(Not Applicable)
People around the world are desperately seeking a breakthrough in sustainable, low-cost means for generating and storing electricity.
Clean, sustainable energy sources like solar, tidal, and geothermal sources, can power the energy system of the present invention. Electricity is the optimum form of energy-output, due to its high transmission efficiency and ubiquitous use in homes, businesses and future automobiles. It is especially appropriate when combined with new high-energy storage capacitors, which are being co-developed and co-refined with the present invention.
Truly global impacts from successful implementations of this invention can include the following: Virtual elimination of “oil addiction,” reversal of global warming and revitalization of global economies.
The prior state of the technology includes ordinary means for photovoltaic and solar-thermal energy conversion. However, all practical prior solutions have several major limitations. For example, practical photovoltaic devices do not store energy (in themselves), are generally costly, must be customized for each installation, require delicate transparent enclosures and bulky mounting structures (usually on rooftops).
The real estate needed for utility-scale energy farms can be a significant cost penalty, whereas the present invention does not require new land. Instead the present invention can make dual-use of existing asphalt-covered areas (e.g. roads, streets, parking lots).
The present invention significantly improves-upon and extends the practical utility of energy conversion technologies that employ variable capacitors. While the prior art, such as U.S. Pat. No. 6,936,994 B1 does describe how moving capacitor plates can convert mechanical energy to electricity, it does not show how to make a practical in-asphalt energy conversion and storage system, as is shown in the present invention.
Therefore, the present invention fulfills an urgent need with new and unique solutions.
a. This perspective drawing illustrates two groups of oppositely charged structures that are in close proximity. This is a relatively low-energy state. Note how charge-neutral many regions are.
b. This perspective drawing illustrates two groups of oppositely charged structures that are in distant proximity. This is a relatively high-energy state. At atomic or molecular separations, large amounts of work (energy) must be done to move from such low-energy to high-energy states. Likewise, large amounts of energy can be stored in such high-energy states.
a. Low-energy state of separated charged particles in space.
b. High-energy state of separated charged particles in space.
a. Low-energy state of separated charged particles on an electrically conductive material.
b. High-energy state of more crowded charged particles on an electrically conductive material. Note the higher forces trying to repel the like-charged particles.
a. Intervening charged dipoles, as in dielectric materials, oppose the electric field between the other charged particles. The net electric field is reduced due to the dielectric material.
b. When dipoles, as shown in
a shows a planar electrode topology.
b. Coaxial cylindrical electrode topology.
c. Rolled pair of sheet-like electrodes topology.
d. Vein/artery-like coaxial cylindrical electrode topology.
e. Muscle-like topology of coaxial cylindrical electrodes topology.
a. In order to illustrate a phase change principle, this graph shows phase changes that water experiences when changing states (i.e. ice to water). Note the region in which temperature does not increase despite a steadily increasing amount of applied energy. During such phase changes, energy is being stored elsewhere (internally, in increased degrees of molecular freedom of motion).
b. Many materials, such as perovskite ceramic materials, can undergo phase changes. One phase, often at low temperatures, leaves an off-center charged particle. This yields a net polarization field.
c. When materials like that shown in
a. When materials such as perovskite ceramic materials change phase, there are complex interactions at the atomic scale. This figure shows that various atoms in the molecular cell have temperature-dependent preferred locations. The specific material illustrated here is merely representative of many different perovskite-like materials that may be used as capacitor dielectrics.
b. The same material as in
a. This figure illustrates the “simple elegance” of a daily 24-hour-energy-transfer-cycle as the Earth efficiently rotates on its axis in space. A representative volume of asphalt is heated in the daytime by a net absorption of radiant energy from a 9800 degree Fahrenheit source (the sun).
b. As the Earth continues to rotate, the representative volume of asphalt can be exposed to a surprisingly cold night sky (as low as −5 degrees Fahrenheit). Thus, the representative volume of asphalt is cooled in the nighttime by a net emission of radiant thermal energy. Note that the long 24 hours cycle time motivates us to incorporate energy storage in this dynamic capacitor energy system.
a. Energy cycles can have a period of significantly less than 24 hours, by various means, such as that shown here. Substantially parallel rays of sunlight enter at an angle that changes over a 24-hour period. A set of occlusions, lenses or mirrors can concentrate the rays into a spatial pattern that alternately hits a plurality of dynamic capacitors. For example, a given set of capacitors becomes alternately hot, then cold, then hot, then cold, etc. Alternatively, trees, buildings, fences, etc can be used as the occlusions.
b. This figure shows a perspective drawing of arrays of linear elements that correspond to the end-on view
This figure assumes primarily compressive forces.
a shows a linear array topology of cables.
b shows a radial topology.
c shows a hexagonal array of such radial topologies, wherein, common stakes in the earth can be shared by nearby cells (to lower cost).
a. This perspective drawing depicts a relatively cold dynamic capacitor with a temperature sensitive dielectric, comprising a plurality of perovskite-like cells. Here, the ions are not centered and there is a large polarization field, that opposes the electric field from the charges on the top and bottom plates. When polarization is high, the capacitor is pre-charged from a electrical source.
b. This perspective drawing depicts the same dynamic capacitor shown in
a. This highly magnified end view of a dynamic capacitor, shows conceptual polar molecules designed to move somewhat like the nearly-centered ions as found in perovskite ceramics. Two states are shown (although they would actually occur at different temperatures). One state of the molecule provides very high polarization that opposes the main electric field between the top and bottom plates. The other state is orthogonal to the main electric field between the top and bottom plates. Note the curves in the molecule.
b. This highly magnified end view of a dynamic capacitor, shows conceptual polar molecules designed to move somewhat like that in
c. This highly magnified end view of a dynamic capacitor, shows conceptual polar molecules designed to move somewhat like that in
a. This figure is a perspective drawing of a deeper profile core enclosure. The domed top and bottom add strength. The lower portion is thermally insulated from the cooler asphalt under-layers. Some inter-core electrical wiring is electrically connected by (optional) insulation-displacement-connectors (IDCs). Also shown are, three examples of series/parallel electrical wiring of dynamic capacitor cores.
b. This figure shows how the enclosure in
a. This figure shows a perspective view of a low-profile core enclosure, like that in
b. This figure shows a perspective exploded view of the top and bottom halves of the box shown in
c. This figure clarifies one way of constructing the partitions or walls (that may need to support heavy automobiles). The slots interlock. The curved openings allow wire routing. The tabs with holes can be used to fasten the partitions or walls to the top and bottom plates. Two convenient shapes of dynamic capacitors are cylindrical and nearly rectangular solid, both of which can be made from rolled films.
If installed on a large scale, this dynamic capacitor energy system could supply a large part of the world's energy needs.
In order to accurately and concisely describe the present invention, the following terms are first listed, then are defined below:
Note: Previously defined terms are italicized in the definitions below and other sections of this application.
“winter-summer cycle” is defined as a roughly 12 month cycle between coldest temperature and hottest temperatures or between the weakest and strongest energy levels.
“night-day cycle” is defined as a roughly 24 hour cycle between coldest temperature and hottest temperatures or between the weakest and strongest energy levels.
“hour cycle” is defined as a cycle between coldest temperature and hottest temperatures or between the weakest and strongest energy levels with period of less than 24 hours. For example, an array of stationary sunshades can alternately occlude received sunlight and result in periods of cool shade and hot sunlight. The time period between cool shade and hot sunlight can be any period less than 24 hours.
“energy conversion cycle” is defined as a winter-summer cycle, night-day cycle, or hour cycle.
“hour-cycle device” is defined as a mechanism with a rotating, revolving, or sliding element for the occlusion, reflection, absorption, refraction, diffraction or redirection of energy. This modulator can be of a two-channel design (one for cold path and one for hot path). For example, a rotating tilted mirror can direct concentrated sunlight in order to alternately heat, then cool a given region. See the main text for other examples.
“asphalt” is defined as asphalt concrete, asphalt, bitumen, or concrete.
“energy absorbing surface” is defined as one or more of asphalt, coal, tar, carbon-compound or mixture, dark pigment containing material, ash, dark rock, metal, water, paint, or nanotechnology-engineered surface.
“energy emitting surface” is defined as one or more of asphalt, coal, tar, carbon-compound or mixture, dark pigment containing material, ash, dark rock, metal, water, paint, or nanotechnology-engineered surface.
“heat storing volume” is defined as one or more of asphalt, coal, tar, carbon-compound or mixture, dark pigment containing material, ash, dark rock, metal, water, paint, or nanotechnology-engineered volume.
“encapsulant” is defined as one or more of asphalt, concrete, gravel, rock, soil, water, air, plastic, or composite (e.g. rock encapsulated in epoxy).
“under layer” is defined as one or more of gravel, rock, soil, water, or earth.
“heat conveying device” is defined as one or more of encapsulant, heat fins, high thermal conductivity material, aluminum, copper, high thermal convection device, high thermal radiation device, phase change device, water in container, refrigerant in container, low pressure vessel, or heat pipe.
“strengthening device” is defined as one or more of rebar-like outer texture (with “anchor” protrusions), fibers, carbon, fiberglass, or other rubber-like materials.
“energy redirector” is defined as one or more of, occlusion, reflection, absorption, refraction, diffraction, conduction, convection, or radiation.
“electrode shape” is defined as one or more of flat plates, curved surfaces, discs, rods, dendritic shapes, polymer shapes, etc. The electrode shape may include protrusions intended to increase surface area.
“electrode” is defined as one or more of an object containing a material capable of substantial conductivity formed in an “electrode shape” and made of copper, aluminum, steel, tin, zinc, carbon, graphite, or other good electrical conductor. One electrode is typically labeled “+”. Another is typically labeled “−”.
“charged particle” is defined as one or more electron, proton, hole, ion, dipole, charged molecule or object capable of increasing voltage between electrodes.
“plate area” is defined as area between the capacitor electrodes.
“plate separation” is defined as area between the capacitor electrodes.
“dielectric constant” is defined as relative permittivity of a dielectric.
“capacitance-controlling parameter” is defined as one or more of plate area, plate separation, dielectric constant, temperature, resonance, electronic band alignment, or pressure.
“variable capacitor” is defined as an object with at least two electrodes, capable of storing energy via electrically charged particles and capable of increasing voltage between its electrodes, due to a change in at least one capacitance-controlling parameter.
“energy yield fraction” is defined as the ratio of energy output to energy input.
“energy converting variable capacitor” is variable capacitor that is capable of increasing its voltage and its total stored energy due to work done on said variable capacitor by changes in any combination of said capacitance-controlling parameters. For example, high-temperature thermal energy (heat) can change one or more of the capacitance-controlling parameters, thereby doing work on the energy converting variable capacitor, which converts a fraction (the energy yield fraction) of said work into electrical energy.
“pre-charge enabled energy converting variable capacitor” is an energy converting variable capacitor that is electrically charged from an energy source in at least one phase of an energy conversion cycle.
“capacitance-controlling curve” is defined as the quantitative relationship between capacitance and various values of one or more capacitance-controlling parameters. When graphed, this relationship typically forms a curve. For example, the capacitance-controlling curve for a common Barium Titanate dielectric is usually a smooth curve with a peak near the Curie temperature.
“multiple capacitance-controlling curve system” is defined as an energy conversion system that incorporates more than one “capacitance-controlling curve” in order to maximize energy conversion efficiency despite challenging variations, such as the variations in extreme temperatures in summer vs. winter. Possible methods of curve selection include swapping one dielectric material for a different dielectric material as well as more sophisticated methods that alter a second capacitance-controlling parameter. For example, overall temperature controlled bimetalic benders can apply pressure on ceramics and change the temperature at which the capacitance peaks.
“temporary energy store” is defined as a device intended to hold energy that is received and held during times of amble energy availability, and to released when energy is needed.
“non-variable capacitor” is defined to be similar to the variable capacitor, except it may not need to change capacitance. The “non-variable capacitor” functions primarily as a temporary energy store. Energy efficient switches can transfer energy between the variable and non-variable capacitors.
“dynamic capacitor core” is defined as a pre-charge enabled energy converting variable capacitor thermally coupled to at least one heat conveying device.
“core enclosure” is defined as a structure that substantially contains a dynamic capacitor core and said structure has good thermal conductivity to a nearby heat conveying device. For example, a short hollow aluminum cylinder, a tall hollow aluminum cylinder, a long steel tube or a subdivided hollow aluminum box with low vertical height can each be a core enclosure. Low-profile (vertical height) enclosures may be needed in order to avoid buried pipes and wires often found under city asphalt roads. Alternatively, interstate highways, for example, rarely have buried pipes, so a higher vertical profile enclosure may be a better choice.
“load bearing enclosure” is defined as a core enclosure that is designed to support heavy loads such as cars and trucks, the when the enclosure is buried in asphalt. For example, a vertically positioned cylinder with a strong domed top and bottom, a horizontally positioned tube with a naturally strong vertical profile, or interlocking perpendicular partitions within a low-profile metal box can each be a load bearing enclosure. (The interlocking perpendicular partitions can be sized to efficiently contain individual capacitors, which are electrically wired together).
“dual nested enclosure” is defined as a two-part core enclosure with one part easily removable from the other. For example, the removable part can contain the pre-charge enabled energy converting variable capacitor and the non-removable part can be permanently embedded in asphalt. If both parts use tapered side walls, then good wall-surface-contact and thus good thermal conductivity can be assured.
“easy access enclosure” is defined as a core enclosure that is designed to be relatively easily accessed despite being buried in asphalt. For example, easy near-to-curb-access can be attained by use of long horizontal tubular core enclosures that protrude through the curb and into an easy-access box. Alternatively, core enclosures can be designed to withstand (and even aid) asphalt coring (cutting of an annular ring from above the core enclosure.) For example, the core enclosure can provide a center pivot for the coring drill tool. Furthermore, an easy access core enclosure could include a coring-drill-bit-resistant top surface, to avoid damage to the easy access core enclosure. Furthermore, an easy access core enclosure could include a dual nested enclosure design with concentric tapered side walls (to ensure good wall-surface-contact for good thermal conductivity).
“peripheral electronics” is defined as electrical devices or circuits that help control electricity flow to or from capacitors in the asphalt. For example, peripheral electronics can be used (inside and/or outside of a dynamic capacitor core) for protection from short circuits, protection from excessive-temperatures, protection from over-voltages, efficient routing of electrical energy, electrical load balancing, part of a dc-to-ac inverter, are prevention, or the timing of operational phases (e.g. pre-charging or load connection).
“explosion-damage limiting enclosure” is defined as a specially designed core enclosure that includes substantially empty volumes accessible via appropriately weakened ports in order to contain expanding gases. For example, if a short circuit occurred in a high-energy dynamic capacitor core, then a significant (but limited by the distributed-nature of the whole system) energy could be released in the form of an explosion (rapidly expanding gasses). Those gasses would do little, if any, damage to things above the asphalt, if the gases expand safely into said substantially empty volumes under the asphalt.
“heat cell” is defined as a region containing an energy absorbing surface, an energy emitting surface, and a heat storing volume that interacts with a nearby dynamic capacitor core. For example, a rectangular, hexagonal or circular region of asphalt road may be a heat cell for a dynamic capacitor core placed near the center of the rectangular, hexagonal or circular region.
“dynamic capacitor energy system” is defined as the overall functional unit that uses dynamic capacitor cores to convert thermal energy into useful electricity.
“non-core dynamic capacitor system node” is defined as an electrical circuit node that is not physically part of a dynamic capacitor core, but is electrically connected to part of the overall dynamic capacitor energy system. For example, some non-core dynamic capacitor system node are nodes at wire junctions that electrically connect one or more dynamic capacitor cores to a temporary energy store, to a pre-charging energy source, to a dc-to-ac inverter, to electrical loads, to over-temperature protection devices, to over-voltage protection devices, to over-current protection devices, or to system functionality monitoring equipment.
“inter-core wiring” is defined as the electrical circuits formed by electrical conductors that electrically connect one or more dynamic capacitor cores with other dynamic capacitor cores and possibly non-core dynamic capacitor system nodes. For example, such connections can be in nearly any combination of series and/or parallel connections of dynamic capacitor cores. Typically, these electrical conductors are copper wires with electrically insulating coatings. Furthermore, inter-core wiring may utilize high voltage insulation and low-labor (quick-to-connect) connectors, such as insulation displacement connectors (IDC). Slack wire regions may be included to allow for asphalt movement (than can occur after installation). Dual-use wiring (which conveys heat and electric charge) is one way to reduce costs.
“dynamic capacitor installation” is defined as a sequence of operations that result in dynamic capacitor cores and their associated inter-core wiring being encapsulated in asphalt and ready for functional operation. While, various dynamic capacitor installations are reasonably obvious, a few are innovative, such as the following installations:
Installation example 1: Unroll a special “fabric” from a large reel carried on a truck, where this “fabric” can contain inter-core wiring with connectors for connection to the dynamic capacitor cores. Installation example 2: Alternatively, the “fabric” can contain pre-wired inter-core wiring and the dynamic capacitor cores themselves. Installation example 3: A hole can be drilled, at a small angle like 25° to an asphalt surface, through a small opening in the asphalt surface. Another distant opening in the asphalt surface is where another hole can be more-vertically-drilled in order to intersect the first hole, thereby leaving a hollow conduit for associated inter-core wiring, but with only minimal asphalt disruption. Note that some installations can be scheduled to coincide with regularly scheduled road resurfacing. Conventional asphalt laying machines can be used for encapsulation.
“radiated energy modulator” is defined as one or more devices that select between high-energy and low-energy radiation paths. This modulator can change at times controlled by a winter-summer cycle, night-day cycle, or hour cycle.
“conducted energy modulator” is defined as one or more devices that select between high-energy and low-energy conduction paths. This modulator can change at times controlled by a winter-summer cycle, night-day cycle, or hour cycle.
“convection energy modulator” is defined as one or more devices that select between high-energy and low-energy convection paths. This modulator can change at times controlled by a winter-summer cycle, night-day cycle, or hour cycle.
“passive relative motion configuration” is defined as a spatial arrangement of energy modulators and dynamic capacitor cores, that are spaced apart such that said dynamic capacitor cores alternate between high and low temperatures as the sun effectively moves from sunrise to sunset. Examples are sets of gratings with dynamic capacitor cores, loovers with dynamic capacitor cores, trees with dynamic capacitor cores, windows with dynamic capacitor cores, buildings with dynamic capacitor cores, and shades with dynamic capacitor cores.
“active relative motion configuration” is defined as spatial arrangement of energy modulators and dynamic capacitor cores, that are actively moved relative to each other, in order to alternate the temperature of dynamic capacitor cores between high and low values. Examples are motor-driven rotating occlusions, revolving reflectors, and sliding thermal insulator panels.
“inductance-based circuit for low-loss pre-charging” is defined as an electrical circuit that efficiently controls charging of one or more capacitors while minimizing energy loss to heat or other undesired forms of wasted energy.
Typically, the inductance is wound on a high-efficiency torroidal ferrite core, so that oscillating energy cycles are locally contained and reapplied to the capacitor.
“dc-to-ac inverter” is defined as an energy conversion device that modifies the energy form an energy converting variable capacitor, conveyed through inter-core wiring, into a standardized electrical energy form. For example, two standardized electrical energy forms are 120 Volts at 60 Hertz and 120 Volts at 50 Hertz. A typical dc-to-ac inverter includes many of the same functions that a typical photovoltaic inverter includes. Also, it may include one or more inductance-based circuits for low-loss pre-charging of dynamic capacitor cores, a circuit to avoid applying abrupt voltage change to dynamic capacitor cores, a microprocessor software or firmware to effectively control pre-charge of dynamic capacitor cores, energy transfer to or from other non-variable capacitors, load connection and disconnection and protection devices. Circuits intended to avoid applying abrupt voltage change may include a means of switching from multiple voltage sources, each with a small increment above others. Dc-to-ac inverters can include solid state switches (e.g. FETs, IGBTs, SCRs, Transistors) ground fault detectors, short circuit protection, high voltage shut-off, analog-to-digital converters for sensing voltage or charging state of variable or non-variable capacitors, or connection to the electric grid or connection to an isolated end-use location.
Continuation of
The preferred embodiment of the present invention is an energy system, part of which is buried in an asphalt road, street, driveway or parking lot.
The long horizontal cylindrical object 17 encloses a dynamic capacitor core with its (+) and (−) terminals electrically connected to capacitor “plates” called electrodes here. Here, the two electrodes, extend the nearly the length of the enclosure 17 and have edges represented by solid (+) and dashed (−) curves. As will be explained later, this large capacitor converts thermal energy to electricity, as well as storing that electricity for immediate or delayed use.
Likewise, the lower profile, heavy load bearing, core enclosure 18, and the vertically cylindrical core enclosure 19 convert thermal energy to electricity, as well as store that electricity for immediate or delayed use.
Although the specific capacitance-controlling parameter used in
a shows two electrically charged regions 51, 52 (typically joined by electrical conductors) that are in close proximity 53. Note that the voltage difference 58 is low, because the opposite charges (e.g. 54 and 55) are already as close as they can be, without arcing, tunneling, or the like. The configuration 50 is a low energy state and is essentially charge-neutral.
Now, as shown in
Digging a bit deeper,
a shows a relatively large area of electrically conductive surface 127 that contains like-charged (mutually repelling) particles like 102. It takes work to confine these repelling charged particles to a smaller area 128.
a shows two charged particles 101, 102 with intervening dipole 151 which naturally tends to orient so as to oppose the electric field 152 between charged particles 101 and 102. Now, if the dipole 151 is removed, or weakened, as shown in
Several basic physical arrangements of variable capacitor electrodes are depicted in
a shows two parallel electrodes. (Electrodes can be essentially free of sharp corners and edges, too).
b is an end view intended to represent coaxial electrodes that are elongated (into the plane of the paper) that may slide or rotate relative to each other. (If rotation is used, then an electrode or dielectric asymmetry, not shown in
c is an end view intended to represent a rolled-up pair of electrodes that are elongated (into the plane of the paper).
d is a perspective view of a vein-like or artery-like geometry of essentially coaxial electrode pairs. It will be practical to build or grow such variable capacitors with biology-inspired techniques.
d is a top view of a hierarchically combined set of essentially coaxial electrode pairs, somewhat like the hierarchy of bundles-of-bundles of muscle elements. It will be practical to build or grow such variable capacitors with biology-inspired techniques.
In many cases, such as in
A fundamental principle of materials undergoing phase changes is illustrated in
A somewhat analogous phase change takes place when some dielectric materials such as Barium Titanate or Lead Zirconate Titanate are heated. These phase changes can substantially effect the materials' dipole strength, dielectric “constant” or permittivity, as further described in
b schematically represents a cold unit cell 225 within a perovskite ceramic. (Here, this example uses Lead Zirconate Titanate or PZT). Notice that, when cold, the positive Ti ion 229 and 230, is off-center (higher than the center of the four negative oxygen ions 227), thereby causing a substantial net polarization 228 due to the strong dipole field.
However, after heating the material to a specific higher temperature (Curie temperature), the positive Ti ion 253 and 254 becomes substantially centered, the dipole is much weaker and the polarization field substantially disappears. Thus, a pre-charged capacitor with this dielectric material will rise in voltage because the dipole that ordinarily opposed the main electric field is substantially gone, as illustrated in
Notice that we should expect a “flat region” with this perovskite somewhat like the flat region 204 in
Digging a bit deeper,
Here, it is convenient to note that such “flat regions” can be used to effectively cool asphalt because a perovskite-bearing asphalt temperature may plateau despite the sun's continued injection of thermal energy. This “heat island reduction” benefit and “asphalt temperature extreme avoidance” can accompany the benefits of conversion to electricity and energy storage (in both thermal and electricity forms).
In the daytime, the sun 326, at about 9800° F. radiates heat to the slab, which can be at about 140° F. Thus, daytime net flow of radiant energy is into the slab.
In the nighttime, the asphalt slab may be about 80° F., which radiates out into a nighttime sky, which can have a temperature of as low as minus 5° F., on a clear, dry night. Thus, nighttime net flow radiant energy is out from the slab.
Notice the “elegant” simplicity and efficiency of this 24-hour energy transfer cycle (e.g. frictionless Earth-axis bearings that show no wear). This night-day cycle can be used to convert solar energy to electricity by a preferred embodiment of the present invention. (Likewise, earth-moon gravitational (tide) changes have similar elegant simplicity, and can power alternative embodiments of the present invention).
In
Should someone try to pre-charge capacitor 359 with no current limiting, then about half the energy will be wasted by switch-contact arcing and RF radiation.
The preferred embodiment of element 353, in
One such use of an inductive element is shown in
Once a relatively cold variable capacitor 359, in
Generally, it is desirable to have sufficient electricity available, at all times. To that end, persons experienced in the art will have no problem understanding dynamic capacitor energy systems that fill the gaps by one of several means. For example, by choosing a plurality of dielectric materials with different Curie temperatures (e.g. by mixing different elements or different ratios of elements), one dynamic capacitor energy system's gaps can be filled from other dynamic capacitor energy system's non-gaps. Additionally, electric grid-connected systems can use their natural geographically distributed daylight timing to fill gaps. Furthermore, temporary energy storage (thermal or charge-based) within dynamic capacitor energy systems can spread out energy supply to better match electricity demand.
In addition to night-day cycles of energy conversion cycles, shorter than 24-hours cycles (called hour-cycles here) can be created by various means, such those illustrated in
a shows the sun 401 emitting radiant energy in direction 402 and the resulting nearly parallel rays that hit the earth 404 at angle 405 at a given time of day. As the day progresses, angle 405 changes and the rays alternately hit different arrays of dynamic capacitor cores. For example, with the angle 405 shown in
Thus, it has been shown how energy conversion cycles, much shorter than 24-hours can be realized.
The fundamental principle can be those of
a is a perspective drawing that depicts a relatively cold 677 dynamic capacitor with a temperature sensitive dielectric, comprising a plurality of perovskite-like cells 683. Here, the ions are not centered, like 679, and there is a large polarization field 678, that opposes the electric field from the charges on the top 676 and bottom 684 plates. When polarization is high, the capacitor is pre-charged from an electrical source 682 by closing switch 680.
b is a perspective drawing that depicts the same dynamic capacitor shown in
a is a highly magnified end view of a dynamic capacitor, showing conceptual polar molecules 734 and 735 in sphere 728 and sphere 729 that are designed to operate somewhat like the nearly-centered ions as found in perovskite ceramics, except with even higher effectiveness. Sphere 728 is a magnified view of sphere 737. Sphere 729 is a magnified view of sphere 738. Two states 728 and 729 are shown (although they would actually be co-located but occur at different temperatures). One state of the molecule 728 provides very high polarization that opposes the main electric field between the top and bottom plates. The other state 729 is orthogonal to the main electric field between the top 727 and bottom 736 plates. Note the curves 735 in the molecule in sphere 729. (This can use a “molecular-scale version” of the principles used in bi-metalic benders). Within sphere 728, positive ion 730 is coupled to pivot point 723 via molecule 731. Also, Negative ion 733 is coupled to pivot point 723 via molecule 732.
When cold, the molecule 734 is straight and its dipole-like field strongly opposes the electric field from the plates. However, when hot, the same molecule reconfigures itself into the curved version 735, which does not oppose the electric field from the plates.
b is a highly magnified end view of a dynamic capacitor, showing conceptual polar molecules designed to move somewhat like that in
c is a highly magnified end view of a dynamic capacitor, showing conceptual polar molecules designed to move somewhat like that in
Also shown in
a is a perspective drawing of a deeper profile core enclosure. The domed top 978 and bottom 882 add strength. The lower portion of the enclosure 880 includes a thermal insulation layer 881 to insulate from the cooler asphalt under-layers. Some inter-core electrical wiring is electrically connected by (optional) insulation-displacement-connectors (IDCs) located behind protrusion 879. (The details of the IDCs' insulation piercing blades are not shown since they are commonly known). Of course, other non-IDC type of connectors can be substituted for the IDCs.
Also inside enclosure 880 is one or more pre-charge enabled energy converting variable capacitors.
Generally, this capacitor has a spiral electrode configuration with its center-of-spiral axis vertically oriented and centered in the enclosure. Alternatively, a plurality of smaller variable capacitors can be interconnected within the enclosure. In order to evenly and effectively convey heat, a type of transformer oil or the like, can be used can fill gaps between capacitors and the enclosure interior, and this applies to all core enclosures.
Also shown in
b shows how the enclosure 903 that was described in
Fasteners, with the approximate functionality of swivel fastener 942 can secure part 927 into the cavity 937. The sloped walls of 927 and cavity 937 provide good mechanical and thermal contact, and is somewhat self-adjusting, despite typical size variations in 927 or 937.
At the bottom of enclosure 925, is shown an optional explosion-damage limiting enclosure 938, which can provide extra volume for expanding gases, in case a capacitor explodes, due to some fault. This is intended to prevent surface asphalt damage that might otherwise result in a road hazard or repair expense.
As already described for
Such a pivot and a surrounding protective surface can be added above the top of part 927, taking care to leave access and clearance for 928 and 930, or modifications thereof.
a is a figure that shows a perspective view of a low-profile core enclosure 976, like that in
b shows a perspective exploded view of the top 977 and bottom 978 halves of the box shown in
c clarifies one way of constructing the partitions or walls (that may need to support heavy automobiles). One representative wall 984 (like 978) is perpendicular to another representative wall 988 (like 979). The slots 985 and 986 mutually interlock forming a strong set of load-bearing partitions. The curved openings like 987 allow wire routing. The tabs 983 with holes can be used to fasten the partitions or walls to the top and bottom plates, by inserting wires like 981 into the captive tabs like 983. Two convenient shapes of pre-charge enabled energy converting variable capacitors are cylindrical 989 and nearly rectangular solid 990, both of which can be made from rolled films.
If installed on a large scale, this dynamic capacitor energy system could supply a large part of the world's energy needs. In order to simplify energy yield comparisons in this section, a somewhat arbitrary “standard” physical volume of actual capacitor is defined to be 10 liters. This may seem to be a rather large volume for each core. However, early versions of pre-charge enabled energy converting variable capacitors are likely to be physically large. As they are further developed, their size will likely be dramatically reduced, at which time, the standard volume may be only a fraction of one liter. For now, we use the conservative 10-Liter standard. Volumetric energy density is a critical distinguishing factor for these capacitors. Traditionally, capacitor volumetric energy density has been too low for practical use. However, recent developments from several different companies (e.g. EEstor inc. and 1st Lighten The Load Inc.) claim much higher volumetric energy densities. Three technologies are discussed here. The are Tec1, Tec2 and Tec3. Briefly, Tec1 is from general publications and has 8 Joules/cc, which is about 2×10−3 kilowatt hours per liter, and means 0.02 kilowatt hours per core. Tec2 is from a company called 1st LTL and has over 300 Joules/cc, which is about 8.33×10−2 kilowatt hours per liter and means 0.83 kilowatt hours per core. Tec3 is from a company called EEstor and had about 52 kWh/336 lbs, which means about 2 kilowatt hours per liter and means 20 kilowatt hours per core. Notice the range between the lowest and highest volumetric energy densities spans three orders of magnitude! It should be noted that EEstor is a very secretive company and their claims are controversial. Still Lockheed Corp. has inspected their technology and claims it is on track. Likewise, little is known about the 1st LTL company. Nevertheless, the published patents of both companies are detailed and plausible. For now, all three energy densities are considered in this document. That is, in
In order to simplify calculations and comparisons in for
Three Energy Thresholds are needed for practical energy yields. The energy “gain” is from the sun's radiant energy. So, there must be at least Esun kilowatt hours of solar radiation falling on the asphalt or concrete cell. In order to utilize a 24-hour night-to-day cycle, the asphalt or concrete cell must be able to thermally store at least Easp kilowatt-hours of heat energy. Finally, the capacitors in the core, that services the asphalt or concrete cell, must be able to store and convert a reasonable amount of energy Ecap.
Thus, Esun>Easp>Ecap. Any one of the three can limit the total energy gain.
According to the NREL (US National Renewable Energy lab), the sun supplies a mean energy of 6 kilowatt hours per day per square meter in the sunbelt states of the USA. This gives 60 kilowatt hours/day per cell. This is an enormous amount of energy and plenty for meeting the “first threshold” Esun mentioned above.
The energy stored as heat in the asphalt depends upon the following:
asphalt specific heat capacity=2.5556×10−4 kilowatt hours/(kilogram degree K)
asphalt density≈2200 kilograms/m3
volume of asphalt in cell=sqrt(10)m×sqrt(10)m×10cm=1m3
High temperature≈60° C.(≈140° F.)→187 kilowatt hours
Low temperature≈26.7° C.(≈80° F.)→169 kilowatt hours
The result is 19 kilowatt hours per cell, which is a substantial amount of energy and it is easily supplied by Esun.
The energy that can be stored in a capacitor is given by Ecap=½CV2 where C is in Farads and V is in Volts. Here, we need to use V and C appropriate to each technology (tec1, tec2 and tec3):
tec1: Ten liters stores 0.02 kWh. Assuming V≡200 volts, then C≈3.6 Farads.
tec2: Ten liters stores 0.83 kWh. Assuming V≡1000 volts then C≈6 Farads.
tec3: Ten liters stores 20 kWh. Assuming V≡3500 volts then C≈12 Farads.
Assuming the 175% energy yield holds for scaled-up systems, we have the following.
Tec1's energy output per cell per day a 0.015 kWh, where one cell is 10 square meters of asphalt.
Tec2's energy output per cell per day a 0.62 kWh, where one cell is 10 square meters of asphalt.
Tec3's energy output per cell per day a 15 kWh, where one cell is 10 square meters of asphalt.
Thus, both tec2 and tec3 provide ample energy yields for highly effective solar energy conversion (and storage). For an intuitive reference, the average household in the USA uses just under 30 kilowatt hours per day 1032.
The “Initial Charge Source” can be from the grid, a battery, photovoltaic unit, etc. or it can be from the previous dynamic capacitor cycle.
Capacitors 1083, 1084 and 1085 may be implemented as a parallel and/or series combination of energy converting variable capacitors.
Delays (not shown) may be needed to allow capacitors to reach desired temperatures.
Thus, an innovative dynamic capacitor energy system has been disclosed in extensive detail.
It should be understood that innovations disclosed herein can be more generally applied than explicitly stated. For example, asphalt, concrete and other materials can play the same role as asphalt does in this text. Thus, energy systems built into walls, bridges, fences, etc. are covered too. Also, there are numerous ways of wiring dynamic capacitor cores, all of which are approximately equivalent. They are all covered too.
To the extent that such variations do not depart from the spirit of the invention, they are intended to be included within the scope thereof which is assessed only by a fair interpretation of the following claims.
Number | Name | Date | Kind |
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20100043867 | Peng | Feb 2010 | A1 |
Number | Date | Country | |
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20100109473 A1 | May 2010 | US |