Patent Application
20060283864
The embodiments relate to transport systems for devices and containers containing dangerous goods. The embodied systems can be used for dangerous goods in cases where packing instructions have not yet been developed for a dangerous good. As one example, the embodied systems can be used to transport hydrogen in a metal hydride storage system. The embodied systems can be used for transport of dangerous goods in cases where the substances are packaged in non-specification packaging.
The embodiments relate to transport systems for devices and containers for dangerous goods that are faster to use and easier to ship than traditional shipping systems.
In order to transport substances classified as dangerous goods (herein interchangeably referred to as ‘dangerous goods’), a consignor must either package the substances in packaging that has been approved as Packaging by the authority having jurisdiction following the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, or, special permission must be obtained from the authority having jurisdiction. For example, to transport dangerous goods in a way not prescribed by the regulations in Canada, a Permit of Equivalent Level of Safety must be obtained from Transport Canada; in the United States, a Special Permit (formerly called an Exemption and herein used interchangeably) or Approval must be obtained from the Office of Hazardous Materials Safety in the US Department of Transportation. Typically, the approval process to obtain a permit in Canada takes from 1 month to several years to obtain. For the United States, the approval process can take from 4 months to several years. Similar mechanisms of providing permission exist in other countries throughout the world.
The need for an Exemption/Special Permit, Approval, or Permit of Equivalent Level of Safety can exist for various reasons. The two most prevalent reasons are a) situations in which the consignor wishes to use non-specification packaging to transport a dangerous good; and, b) situations in which a packing instruction does not exist—common when a substance has been newly regulated.
Both of the prevalent reasons for needing of the Exemption/Special Permit, Approval, or Permit of Equivalent Level of Safety occur in the case of fuel cell technology. New ways of packaging dangerous goods are always emerging; in addition, new fuels are being developed. The lengthy period of time required to obtain necessary approvals has caused major setbacks in development of fuel cell technology because of the time needed to wait for approval to transport these devices. At present, every device design that either does not qualify as specification packaging or contains a dangerous good that does not yet have a packing instruction must be approved individually prior to being transported. In addition, there is a need to prove the new materials and devices are compliant with shipping safety requirements. This means devices which have been designed to be safe must still be proven to be safe before they can be granted permission to be transported. Therefore, the requirements of shipping place very difficult requirements on the development and sharing of prototypes and early demonstration devices. The requirements force developers to take devices many steps down the road to distribution prematurely in the product development cycle.
Metal hydrides are a popular means of storing hydrogen fuel in some types of fuel cell technology. Traditionally, uncertified devices with metal hydrides cannot be shipped. Only certified and/or approved vessels, such as DOT 3AL certified cylinders, containing the metal hydride material have received the requisite permissions required for shipping metal hydride material. In addition to being limited to storing the metal hydride in a certified or approved cylinder, it has taken a long time to obtain shipping permits for these devices. This method of shipping is particularly not feasible when considering the transport of pre-production metal hydride containing devices.
A need exists for a method of transporting that does not necessitate recertification of every iteration of device, which is faster than the one month to several years encountered to obtain a permit to transport devices.
The embodiments meet these needs.
The detailed description will be better understood in conjunction with the accompanying drawings as follows:
The embodiments are detailed below with reference to the listed Figures.
Before explaining the embodiments in detail, it is to be understood that the embodiments are not limited to the particular embodiments and that the invention can be practiced or carried out in various ways.
Special permission from a governing authority having jurisdiction is required in order to transport substances classified as dangerous goods, unless those substances are being transported within the guidelines of existing transport regulations. Often, the dangerous goods are contained in objects which may not yet have been approved by the relevant governing authority for transport of the substance. These objects may be devices, for example portable electronic devices, or they may simply be a means of containing the substance. If the object is not approved under the existing transport regulations, special permission from the governing authority having jurisdiction must be obtained prior to transport.
The embodied shipping containers and methods of use entail selecting a shipping container with suitable properties, such that the shipping container could safely contain any worst-case failure event involving the dangerous goods intended to be shipped inside the container. In order to obtain permission from relevant governing authorities, the proposed means of transporting the goods (including selected packaging) must be shown to provide a level of safety acceptable to the relevant governing authority. In an embodiment, the shipping container is designed to be pre-approved by the governing authority having jurisdiction so that the shipping container is recognized as able to safely contain the device or material no matter what might happen to the shipping container during transport. The design of the shipping container places limits on the amount and type of objects, dangerous goods or devices that can be transported by the container. As long as those limits are conformed to, a great deal of flexibility can be afforded in the use of (potentially) uncertified devices containing the dangerous goods when transported within the shipping container.
The embodied shipping containers and methods of use may be used for transport of any substance classified as a dangerous good (according to the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations) or which could be classified as a dangerous good when tested according to the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria. It is possible to tailor the properties of the shipping container such that its properties are particularly suitable for ensuring safe transport of the dangerous good in question. For example, to transport substances classified as Class 1, Explosive, an explosion-proof shipping container might be selected; to transport substances classified as Class 2 (gases), Class 3 (flammable liquids), or Class 4 (flammable solids, substances liable to spontaneous combustion, or substances which, on contact with water, emit flammable gases) a shipping container capable of withstanding high pressures and high temperatures might be selected; to transport substances classified as Class 5 (oxidizers and organic peroxides), a shipping container with a suitable inert inner coating might be selected; to transport substances classified as Class 8 (corrosive), a corrosion-resistant shipping container might be selected.
For example, in one embodiment, the shipping container may be a sealable certified outer pressure vessel having a pressure resistant shell capable of withstanding high pressures as well as high temperatures. Once approved for use with a dangerous good, the shipping container can be used to transport uncertified devices containing the dangerous good, within the limits prescribed by the relevant authority, wherein the means of containing the dangerous good or uncertified device is not yet approved by a competent authority having jurisdiction. By virtue of fitting the device containing the dangerous goods within the shipping container, safe transport is assured. The embodied shipping containers can have a chamber within the pressure resistant shell defining a chamber for containing one or more uncertified devices or dangerous goods. The embodied shipping containers can have a closable access lid that allows the uncertified device or dangerous good to be inserted into the chamber of the shipping container for transport. The shipping container can have a pressure relief device installed through the pressure resistant shell for providing emergency pressure relief.
In one embodiment, the shipping container can be selected such that the shipping container is appropriate for transporting one or more uncertified devices (for example, a device comprising hydrogen stored in a metal hydride storage system). These embodiments can be suitable for other dangerous goods such as hydrogen, or substances that can be described as hydrogen storage materials (for example, carbon, chemical hydrides, and hydrocarbon fuels). These embodiments can be suitable for other dangerous goods that might also be suitable for use as fuel for a fuel cell, such as methanol, ethanol, formic acid, butane, or borohydride compounds. In these embodiments, selection criteria for the shipping container can comprise: ability to withstand the pressure that could be generated if the device inside were to be compromised and release all hydrogen gas into the shipping container; ability to withstand the temperature that might be created inside the shipping container if the devices inside were to catch fire; ability to withstand the pressure and force that could be generated if the devices inside were to explode; ability to withstand an external fire such that the effects of said fire would not result in an event inside the shipping container that could result in escape of dangerous goods into the surroundings; ability to contain the dangerous goods contained within the devices inside the shipping container regardless of external conditions (within reasonable limits).
Other examples of objects optionally comprising substances classified as dangerous goods transportable by the embodied shipping container include, but are not limited to: sealable containers (such as plastic bags), screw top tubes, glass bottles, metal canisters, or combinations of these items. Other examples of objects comprising substances classified as dangerous goods may include laboratory sample containers containing a measured amount of the substance, components of an electrical device using a substance classified as a dangerous good as a fuel; components of a fuel cell with a fuel plenum containing a substance classified as a dangerous good (optionally for use as fuel), components of a fuel cell system with a fuel cartridge containing a substance classified as a dangerous good for use as fuel, components of a compact chemical reactor with a plenum containing a substance classified as a dangerous good, portions of a fuel plenum for a fuel cell containing a substance classified as a dangerous good, portions of fuel plenums for fuel cell layers containing a substance classified as a dangerous good and combinations of these items.
For example, substances classified as dangerous goods that may be appropriate for use as fuel include, but are not limited to: methanol, ethanol, formic acid, hydrogen in a metal hydride storage system, compressed hydrogen, liquid hydrogen, hydrogen stored in a hydrogen storage material (for instance, carbon), hydrogen stored in a chemical hydride, borohydride compounds, butane, or combinations thereof.
The metal hydride, with or without hydrogen, either in the uncertified device or as a separate dangerous good, can optionally be maintained in an inert atmosphere within the shipping container during transport. Examples of inert atmospheres include argon, nitrogen, helium, combinations of these gases, and oil (such as food grade white mineral oil). Examples of metal hydrides are elemental hydride (such as vanadium hydride or magnesium hydride); intermetallic hydride with crystal structure (such as A2B, AB, AB2, AB3, AB5, A2B7, or A2B17); solid solution hydride; multiphase hydride; composite hydrides; and combinations thereof.
In order to transport substances classified as dangerous goods, one must comply with applicable national and international law. These laws are generally developed based on the United Nations Recommendations on the Transport of Dangerous Goods. As mentioned above, special permission may be granted by the relevant governing authority to provide relief from certain sections of the laws. Regardless of relief provided, all other sections of the laws must be adhered to. These sections, which may include requirements for documentation and other transport procedures, are known to those skilled in the art, and will not be further discussed.
Possible shipping modes for the embodied shipping containers include rail, truck, cargo ship, cargo airplane, cargo compartments of passenger airplanes, combinations thereof, and similar types of transport. The selection and guidelines for transport are governed by the relevant authority having jurisdiction.
The embodied shipping containers can be used to safely transport substances classified as dangerous goods, and objects containing substances classified as dangerous goods (also referred to as ‘dangerous goods’). The embodied shipping containers can ensure that an adequate level of safety is maintained throughout the transport process, thereby providing a process of transport that does not compromise the safety of the public.
The embodied shipping containers support commerce by improving the ability to ship dangerous goods and objects containing dangerous goods, thereby enabling shipping of the material itself or a component containing substances classified as dangerous goods without requiring the object containing the substance to be approved or certified by any regulatory body. The use of the embodied shipping container allows system developers to share prototype devices and components with other developers or potential customers in a timely manner without the expense and time delay of certifying a particular device that may not have any commercial value. The embodied shipping container, therefore, serves to accelerate the process of product development, streamline costs, and order operations in a manner that ensures the highest level of safety.
With reference to the figures,
In one embodiment, the shipping container includes a shell (12). In some embodiments, it may be suitable for the shell to be a pressure resistant shell. In some embodiments, the shell may comprise a pressure relief device installed through the pressure resistant shell. The pressure relief device could be selected from the group comprising: fusible trigger, fusible plugs, rupture disks, diaphragms, or re-sealable type pressure relief devices such as spring-loaded pressure relief valves, or combinations thereof.
In one embodiment, the shipping containers can be used to transport hydrogen in a metal hydride storage system. The shipping container (10) is a sealable certified pressure vessel. The shipping container (10) includes a pressure resistant shell (12). A closable access port (22) allows the object, device or a good to be transported to be inserted into the chamber (16) in the shipping container (10). The closable access port (22) can be closed using a lid. In this embodiment, the shipping container (10) and/or pressure resistant shell (12) can be constructed of durable materials that can withstand pressures of at least 1800 psig (130 bar) and operating temperature above 500 degrees Celsius. Examples of materials include stainless steel, steel, composite material over steel, aluminum, composite material over aluminum, or composite material over polymer, among other things.
As shown in
The pressure resistant shell (12) can have one or more chambers located inside the pressure resistant shell (12) in order to transport one or more objects, devices or goods. A separate object, device or goods can be placed in each chamber or, alternatively, two or more objects, devices or goods can be shipped in each chamber.
In an embodiment, the at least one object containing a substance classified as a dangerous good can be a device containing a fuel cell system, wherein the substance may be used as fuel for the fuel cell system. In this embodiment, the substance which may be used as fuel for the fuel cell system could be selected from the group comprising: methanol, ethanol, formic acid, compressed hydrogen gas, liquid hydrogen, hydrogen in a metal hydride storage system, hydrogen occluded in a hydrogen storage material (such as activated carbon, carbon nanotubes, carbon nanofibres, chemical hydrides), borohydride compounds, butane, or combinations thereof. In another embodiment, the at least one uncertified device can be a container containing at least some metal hydride.
Returning to
The shipping container (10) can have a pressure relief device (24) that is installed through the pressure resistant shell (12) for providing emergency pressure relief if pressures in the vessel or temperatures inside the vessel exceed a preset limit. For example, limits may include a pressure limit of around 1000 psig and a temperature limit of 100 degrees Celsius for the same vessel. In another example, limits may include a pressure of between 1800 psig and 3600 psig, and a temperature of about 100° C.
The embodied shipping container (10) is not limited to the permissions from the United States and Canada; the shipping containers (10) can be used for shipping dangerous goods, or objects containing dangerous goods, to, from, or in any country which has in its transport regulations, provisions of similar processes for requesting special permission to transport dangerous goods outside the existing regulations.
An identification number (40) can be added to the outside of the shipping container (10). The identification number (40) can be a unique identifier for the particular container. The identification number (40) can be an identifier that links the shipping container to the Approval, Permit, Special Permit/Exemption, or other permission under which the shipping container is being transported. The identification number (40) can be permanent and non-removable.
As an example of use of the embodied shipping container, a pressure vessel, such as the embodied shipping container discussed herein, can be used if the pressure vessel can be shown to provide an equivalent level of safety under the requirements of the governing authority having jurisdiction. One or more dangerous goods or objects containing dangerous goods may be inserted into the one or more chambers in the pressure vessel through the closable access lid on the pressure vessel. The access lid is closed forming a closed certified pressure vessel and the closed certified pressure vessel is delivered to a common carrier for transport.
As an example embodiment, the shipping container can have a 3¼″ or 4-9nch inside diameter, which is large enough to permit multiple attachments or openings into the lid of the shipping container. The size is small enough, though, to be conveniently handled without auxiliary equipment, such as fork lifts or other lifting means. The shipping container is available in standard pressure vessel materials. The closable lid can come in various styles: a blank lid; a lid with a threaded socket, and a lid with an installed thermowell or temperature sensor. The shipping container can be customized to a user's need by adding additional ports or openings, or additional inlet and outlet vales, or safety vales, rupture disks, sensors, dip tubes, electrical leads, and similar fittings.
While these embodiments have been described with emphasis on the embodiments, it should be understood that within the scope of the appended claims, the embodiments might be practiced other than as specifically described herein.
The present application claims priority from co-pending U.S. Provisional Patent Application Ser. No. 60/651,708, filed on Feb. 10, 2005.
| Number | Date | Country | |
|---|---|---|---|
| 60651708 | Feb 2005 | US |
