The present invention relates generally to a portable cooling system employing evaporative cooling. In particular, the present invention is related to a system and method for cooling livestock during various stages of transport or relocation.
The use of evaporative cooling is a rapid but safe method for cooling live animals. The transport of animals in warm climates, particularly during high seasonal temperatures, creates a variety of problems not previously resolved in the art. In particular, loading, transport, and unloading of livestock during high temperatures increases the likelihood of heat related health issues, including, but not limited to, heat stress or stroke, suffocation, and death.
Transporting poultry exacerbates the above problems due to the particular sensitivity of poultry to high temperatures. Birds are homoeothermic creatures—they produce heat to maintain a relatively constant body temperature. A five-pound chicken has the ability to produce over 50 BTUs of heat per hour and must rid itself of the same amount of heat per hour to maintain constant body temperature. The body temperature of poultry averages around 104-107° F., but will fluctuate depending upon the environmental temperature. Poultry has an easier time maintaining a constant body temperature with an environmental temperature of at least 10-15° less than its core body temperature. Moreover, there is a greater margin for error on the low temperature side, such that a chicken's body temperature in cold weather can drop as low as 73° F. before becoming fatal. There is much less flexibility, however, on the high temperature side—where an upper lethal limit on core temperature is 113-117° F. Therefore, a chicken must be able to constantly rid itself of excess body heat.
Poultry is generally raised in large specialized coops or houses (also known as broiler houses), that utilize evaporative cooling. Hundreds or even thousands of birds are kept in chicken coops at a temperature of at least 10-15° less than their core body temperature to maintain healthy and timely growth. The evaporative cooling system in the coops encompasses foggers, large fans, and/or misters. Foggers are cooling liquid systems which spray fine particles of cooling liquid into the air and bring down the ambient temperature. Through humidity controlled cooling, liquid discharge of the foggers is an ideal environment for the poultry that is sufficient for survival. Foggers coupled with fans minimize the effect of heat produced by the birds. Birds don't sweat, and therefore depend on losing heat through respiration and releasing heat from surfaces such as wattles, shanks, and unfeathered areas under the wings. Increasing air movement helps birds lose excess body heat.
While poultry is grown in a controlled environment such that the birds are not accustomed to the heat outside of the coop, they must, however, be transported to processing centers and are generally done so at their heaviest weight when they are most susceptible to heat related illnesses. Large chicken houses can easily accommodate the resources necessary for cooling instruments such as fans, foggers and the like. Transport vehicles for hauling livestock and poultry, however, are limited in space for handling such cooling instruments. While a vehicle traveling down the road generally provides adequate wind buildup inside the trailer to keep the birds cool, loading, unloading, and vehicle breakdown creates significant obstacles in maintaining the health of the birds.
Chickens to be transported to a slaughter house are generally first removed from the coop and placed together in small cages that are stacked and/or loaded atop a transport trailer. The birds are caged in very close confines, wherein the loading process generally takes about 45 minutes or more. This amount of time spent in close quarters results in a rapid increase in body temperature, particularly for birds that are experiencing the outside heat for the first time in their lives. Temperatures in many southern U.S. states during warm months can far exceed 100° F., causing numerous fatalities. On average, the DOA (“death on arrival”) rate for birds from heat related causes can be as much as 11% or more. Birds that arrive DOA are not suitable for their intended uses, particularly human consumption. Similar problems arise during unloading and when transport vehicles break down on the side of the road.
The transport of poultry ideally requires at least a transport vehicle, a vehicle to carry a loading machine or forklift, a vehicle that contains or carries a portable cooling apparatus, and a portable toilet for the workers employed in the catching and loading process since many farms that raise such animals (e.g., poultry) do not have readily accessible and/or public toilet facilities. If these systems can be minimized to two or even one vehicle, the costs and savings in labor over the present systems could be substantial.
Attempts have been made to address cooling problems. Sullivan et al. (U.S. Pat. Nos. 6,546,743 & 6,796,136) discloses a mobile evaporative cooling apparatus on a van-type trailer with fans and misters that expel water into a mixing chamber for being drawn into the air stream of the back of electric fans out towards the intended target. There are numerous problems with this design. First, the use of electric fans necessitates a strong electric power source that is generally less powerful than hydraulic fans. Moreover, having water propelled into and through an electric fan is an inherent hazard, in addition to creating an environment where the electric fan motor corrodes and deteriorates rapidly over time. Second, the necessity of having an encased mixing chamber takes up the entirety of available space on the cooling trailer, and does not allow for additional equipment needed on sight during the loading of poultry, such as water tanks for the system, a portable toilet for the workers, or the capacity to load a forklift onto the trailer. Third, the fan positioning of the trailer in Sullivan et al. does not provide a coverage area greater than the length of the trailer, such that it must be parked close to perfectly in line with the trailer to be loaded with livestock.
Similarly, Maynor (U.S. Pat. No. 6,382,141) calls for the use of electric fans and teaches away from using spraying systems that propel water directly onto the animals. In addition, the design of Maynor's trailer is not large enough to carry sufficient water for the process, instead relying on a water supply at the location where the system is to be utilized Likewise, the trailer doesn't have the coverage capacity, nor would it be able to include a portable toilet for the workers or accommodate a forklift
Additionally, a Koolchick system by Techno-Catch LLC (www.chickencatcher.com/koolchick.cfm) provides a fan system utilizing evaporative cooling with hydraulic power, but fails to provide the expansive coverage that is desired, provides only four 8-foot fans with a mere 100,000 CFM, has a limited sprayer coverage that would be incapable of soaking the poultry, fails to include a separate hydraulic connection system for each fan, and fails to provide for angled fans to create an ambient gas environment of evaporative cooling the length of such system. Moreover, the Koolchick system fails to include many additional features and advantages of the present system.
In consequence, the art continues to seek improvements in means for transporting and loading livestock, with particular attention to poultry, such that heat related health issues are decreased or avoided. While the teaching of the above cited art fails to provide the advantages of the present system, the above cited references are incorporated herein by reference. The embodiments of the present invention, methods and systems disclosed herein, that create solutions to the problems raised above.
The present invention relates to portable cooling systems employing evaporative cooling. In particular, the present invention is related to a system and method for cooling livestock during various stages of transport or relocation.
In one aspect, the invention relates to equipping one or more fans with cooling liquid propulsion devices or misters that deliver a quantity of cooling liquid or mist into the air propelled from the fan and onto the livestock. As cooling liquid collects on the livestock or birds and thereafter evaporates as a result of the air flow, the resulting convection rapidly and safely reduces the temperature while absorbing the thermal energy emanating from the birds.
In another aspect, fans with cooling liquid propulsion devices are used to thoroughly soak the birds and keep them wet in anticipation of the air that will pass through the trailer during transport wherein convection keeps the birds cool while the transport vehicle is in motion.
In a further aspect, the invention relates to a plurality of fans that run along a flat-bed trailer, wherein the fans are equipped with water misters for the convection cooling process. The fans on each end of the trailer are angled outward to extend the coverage area. The trailer is pulled next to the livestock transport trailer to keep the animals cool during the loading/unloading process, where the core temperature of the birds may peak. Since the fans on each end are angled, the cooling system trailer need not be pulled exactly along side and in-line with the transport trailer.
In a further aspect, the invention relates to a single livestock transport trailer that includes a self-contained evaporative cooling mechanism with fans and cooling liquid misters. The fans in this aspect of the invention would be thinner relatively than those depicted in other aspects and would be along one side of a transport trailer extending along the edge in such a manner as to minimize the space taken up on the trailer. Additionally, this aspect of the invention would likely include cooling liquid storage tanks under the trailer. Moreover, the hydraulic power may be supplied via the transport truck that drives the trailer, allowing for additional space for the poultry cages to be loaded onto the transport trailer without the loss of space relative to conventional transport trailer. Finally, as an additional option, the fans may be allowed to stick out a width from the side of the trailer, generally not beyond the scope of the outside extended side minors of the truck, so has to avoid implication of most states' wide-load specifications, but to allow greater storage space on the trailer itself. This system would allow for evaporative cooling during travel and truck break downs, in addition to the loading and unloading steps. A forklift could still be loaded on the rear of the trailer, but there would not likely be adequate space for a portable toilet absent the sacrifice of additional space for the poultry cages.
A further aspect of the invention relates to a cooling system with one or more fans, an engine for powering the system, a hydraulic pump for driving power from the engine to the fans, a cooling liquid source, a cooling liquid pump, misters, and controls for running the system.
Another aspect of the invention relates to self-contained livestock transport and cooling device that includes fans, hydraulic pump for powering the fans, cooling liquid source, cooling liquid pump, misters, and controls for running the system, all of which are powered by the engine of the transport vehicle or truck.
A still further aspect of the invention relates to a fully mobile system, incorporating one or more fans, an engine for powering the system, a hydraulic pump for driving power from the engine to the fans, a cooling liquid source, a cooling liquid pump, misters, controls for running the system, a gate surrounding the back of the fans, a fold-down ladder that provides access to the portable toilet and maintenance area, and a maintenance access door that is equipped with a trip switch to be engaged when opened to stop the fans for safety reasons.
A still further aspect of the invention relates to a fully mobile system, incorporating one or more fans, an engine for powering the system, a hydraulic pump for driving power from the engine to the fans, a cooling liquid source, a cooling liquid pump, misters, controls for running the system, and optionally including a canopy for covering the livestock transport vehicle to shield the livestock from direct sunlight.
A still further aspect of one embodiment of the invention provides a strong sprayer piping system capable of withstanding the high wind velocity of the fans as the sprayer piping is placed on the face of the fan cage. Such placement avoids the potential damage or deterioration over time to the fan motor or blades as a result of the water exposure from the sprayers, foggers, or misters placed behind the fans. Likewise, the piping would ideally handle high pressure cooling liquid and accommodate both missing nozzles for evaporative cooling, fogger nozzles for the same but at a lighter liquid load, and sprayer (also referred to a “soaker nozzles”) nozzles for soaking the poultry such that the fluid continues the evaporative cooling process while the transport trailer is in transit.
A still further aspect of one embodiment of the invention provides for a hydraulic system to avoid the problems associated with electric fan motors, but which also optionally includes quick disconnect couplers to disable any one fan separately for service or removal. Likewise, one embodiment of the system may include a multiple hydraulic control which operates each fan individually through one control manifold.
A still further aspect of one embodiment of the invention provides a portable cooling system, comprising: a mobile carrier; at least one motive ambient gas driver generating in operation an ambient gas flow stream, wherein said at least one motive ambient gas driver is mounted on the carrier; a motor for driving the at least one motive ambient gas driver; a power source for driving the motor; and a liquid source arranged to supply liquid to an air stream generated in operation of said at least one motive ambient gas driver.
A still further aspect of one embodiment of the invention provides a portable cooling system, comprising: a mobile carrier; at least one fan mounted on the carrier; a motor for driving the at least one fan; a power source for driving the motor; and a liquid source arranged to supply liquid to an air stream generated in operation of said fan.
A still further aspect of one embodiment of the invention provides a method of transporting poultry comprising: providing a mobile cooling system mounted on a mobile carrier, the mobile cooling system comprising a motor for driving the at least one motive ambient gas driver; a power source for driving the motor; a liquid source arranged to supply liquid to an air stream generated in operation of said at least one motive ambient gas driver; and activating the mobile cooling system in proximity to the poultry.
A still further aspect of one embodiment of the invention provides a method of reducing poultry loss incident to heat during transport, comprising: providing a mobile cooling system mounted on a mobile carrier, the mobile cooling system comprising a motor for driving the at least one motive ambient gas driver; a power source for driving the motor; a liquid source arranged to supply liquid to an air stream generated in operation of said at least one motive ambient gas driver; and activating the mobile cooling system during loading and unloading of said poultry.
Other aspects, features and embodiments of the invention will be more fully apparent from the ensuing disclosure and appended claims.
The present invention relates to a portable cooling system employing evaporative cooling. In particular, the present invention relates to a system and method for safely cooling humans or animals and in particular, livestock during various stages of transport or relocation.
The advantages and features of the invention are further illustrated with reference to the following examples, which are not to be construed as in any way limiting the scope of the invention but rather as illustrative of one or more embodiments of the invention in specific applications thereof. Referring in more detail to the figures, wherein reference numbers indicate like parts throughout each figure.
A 48 or 53 foot flat bed or drop deck trailer may be used, although with some rural road restrictions, the 48 foot trailer may be more practical. Such a 48 foot or greater sized trailer is ideal for covering an equal length poultry transport trailer, but is benefitted by the expansive fan system in one embodiment that includes non-parallel end fans relative to the middle fans to provide broader coverage than parallel fans. Fans ideally may be facing the (left) driver's side (“front side”) of trailer for poultry loading areas but can be configured in different ways for other applications. Moreover, each component of the system 100 can be located anywhere on the trailer for the operator's convenience. The trailer 101 can be used to cool livestock on the farm, in barns, or in the loading areas. The trailer can also be used to cool large crowds of people such as outdoor concerts or water parks. The fan trailer can be configured in many different ways to accommodate a user's needs.
On a system that has fans on a transport trailer, the controls for the system will likely be within the truck since the truck will power the system. Such a system could still have the capacity for loading a forklift on the rear, tanks below the trailer and the fans along one side of the trailer in a much thinner fashion, possibly extending the width of the trailer. A portable toilet would not likely fit on such a system.
The piping 121 includes a series of nozzles 115 for delivering cooling liquid into the flow or air generated by the fans 102. Also shown is the cooling liquid supply hose reel 109, the portable toilet 108, a hydraulic storage tank 107, the engine 106, the fuel tank and battery 105, a cooling liquid holding tank 103 and cooling liquid pump 104. The trailer is equipped with a portable restroom 108 to be used by farm workers and/or catch crews.
A system of the type shown schematically in
The hydraulic system operates at 1,800 psi under full load. The hydraulic piping and hoses are rated at 4,000 psi which will ensure long life of the hydraulic system with no plumbing problems.
The spay nozzles 115 can be configured in several different ways. The nozzles 115 may be positioned around the piping and can include both spray nozzles and mister nozzles. The spray nozzles are used when more water is needed such as soaking the animals. The mister or fogger nozzles are used when less water is needed but the evaporative cooling is still desired. Adjustable nozzles are also desired to vary the flow of cooling liquid with ease.
While the invention has been has been described herein in reference to specific aspects, features and illustrative embodiments of the invention, it will be appreciated that the utility of the invention is not thus limited, but rather extends to and encompasses numerous other variations, modifications and alternative embodiments, as will suggest themselves to those of ordinary skill in the field of the present invention, based on the disclosure herein. Correspondingly, the invention as hereinafter claimed is intended to be broadly construed and interpreted, as including all such variations, modifications and alternative embodiments, within its spirit and scope.
The benefit of priority of U.S. Provisional Patent Application No. 61/294,698 filed Jan. 13, 2010 in the name of Billy Bain for “Portable Livestock Cooling System” is hereby claimed. The disclosure of said U.S. Provisional Patent Application No. 61/294,698 is hereby incorporated herein by reference, in its entirety, for all purposes.
Number | Date | Country | |
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61294698 | Jan 2010 | US |