Abstract: The invention pertains to a cooler particularly suitable for use with recreational vehicles, such as tent trailers, and consists of a receptacle formed of a homogeneous sheet of synthetic plastic material wherein a portion of the receptacle includes a first bottom portion located at a vertical orientation higher than the vertical orientation of a second bottom receptacle portion wherein the cooler bottom is defined at different elevations. A partition separates the cooler multi-levels and consists of a wire grill slidably received within grooves defined in the receptacle side walls. Block ice may be located within the upper cooler level and a refrigeration system evaporator may also be placed therein, and the cooler construction permits a relatively large size cooler capacity in a concise configuration particularly adaptable to the vehicle interior configuration.

Abstract: Method and apparatus for continuously freezing and melting a fluid mixture, for use in separating a fluid mixture into dilute and concentrated components which have been made separble due to the freezing. A turbine is used to produce mechanical energy to drive a refrigeration compressor, while exhaust heat from the turbine is used for secondary cooling. Heat from a refrigeration condenser is used to melt the liquid frozen by a refrigerant evaporator. The evaporator and condenser may comprise a plurality of plates or may comprise a bubbler for bubbling refrigerant directly into contact with the fluid mixture.

Abstract: An apparatus to circulate and regulate the flow of cold air from the exterior of a building having a cold room to the cold room to supplement the refrigeration of the cold room provided by the usual refrigeration equipment. Duct work is provided to carry cool air from the exterior of the building to the cold room, and further duct work is provided to exhaust air from the cold room. One or more blowers operate in conjunction with the duct work to circulate the air through the duct work and through the cold room. The blowers are controlled by temperature controls such that the apparatus can operate only when the temperature outside is below a high temperature limit, and does operate when the temperature in the cold room approaches or exceeds an upper temperature boundary to introduce cold air into the room until a lower temperature boundary is reached.

Abstract: An auxiliary method and apparatus therefor for cooling refrigerated enclosures equipped with a primary refrigerating system, includes an intake opening mounted in fluid communication with a source of cold air and a blower having its inlet connected in fluid communication with the intake opening to draw cold air from the source of cold air, such as cold outside ambient air. The blower is mounted within a heated enclosure to prevent the blower housing from collecting moisture therewithin. A discharge opening is provided in the walls surrounding the refrigerated enclosure and a conduit connects in fluid communication the outlet of the blower and the discharge opening for supplying the cold air to the interior of the refrigerated enclosure when the blower is activated.

Abstract: In one embodiment, a closed cycle gas turbine system employs a precooler for cooling the gas prior to compression. A closed loop coolant circuit for the precooler includes a primary heat exchanger. A secondary heat exchanger is provided which may be employed during periods of peak demand on the turbine system to provide additional cooling for the coolant in the closed loop coolant circuit for the precooler. The secondary heat exchanger may also be employed to transfer heat in the reverse direction during periods of time in which the primary heat exchanger is operating at high effectiveness to provide storage of a fluid at low temperature to enhance operation in the initially described mode. In another embodiment, a similar coolant circuit operates in conjunction with a condenser for a steam power electrical generating facility.

Abstract: Apparatus for supplying a refrigeration system with a low-temperature liquid CO.sub.2. High pressure liquid CO.sub.2 is supplied from a storage vessel system to a holding chamber where the pressure is reduced to create vapor and CO.sub.2 snow, forming a low-temperature coolant reservoir. Vapor is removed from the chamber to maintain the pressure therein at about 75 p.s.i.a. or below by a compressor and returned to the storage vessel. The stored cooling power of the reservoir is then employed to meet refrigeration demand and is thereafter replenished over a period of hours. The storage principle can be incorporated into a variety of different systems. For example, additional liquid CO.sub.2 may be supplied from the storage vessel to a refrigeration system wherein vapor is created that is transferred to the holding chamber for condensation by melting the snow.

Abstract: A system for filling vehicle tanks with low pressure liquid carbon dioxide. A holding chamber is supplied with high pressure liquid CO.sub.2 from a storage vessel system, and the pressure of liquid CO.sub.2 is reduced to about 60 psig or below to create CO.sub.2 vapor and CO.sub.2 snow and form a low-temperature coolant reservoir in the holding chamber. CO.sub.2 vapor from the chamber is compressed and returned to the storage vessel system. Liquid CO.sub.2 from the storage vessel system can be supplied simultaneously to several vehicle tanks at below about 125 psig, and vapor created as a result thereof is condensed by melting CO.sub.2 snow in the holding chamber. Standby cooling of vehicle compartments is provided by vaporizing liquid CO.sub.2 from a vehicle tank in a heat exchanger for vaporization therein, expanding the vapor to cool it and then passing the expanded vapor through a second heat exchanger.

Abstract: A refrigerated semitrailer truck for both long and local delivery of frozen foods in a hot environment is disclosed which utilizes both a liquid nitrogen unit and a mechanical refrigeration unit with an automatic control system. The system automatically turns the liquid nitrogen off when the temperature is above 30.degree. F., below -10.degree. F., or when an access door to the insulated truck is open. The liquid nitrogen also operates as a standby unit at all temperatures above -10.degree. F. in the event of a malfunction of the mechanical unit.

Abstract: An apparatus for simultaneously monitoring the temperature within a refrigerated enclosure and the temperature of the ambient air exteriorly of the enclosure which functions to shut down normal compressor operations and selectively activates one or more primary and auxiliary ambient air inlet supply units dependent upon the temperature of the ambient air when the ambient air temperature is below the temperature within the enclosure.

Abstract: In a preferred embodiment, a mateable upper and lower vessel having upper and lower compartments substantially isolated from one-another, of insulation light-weight material self-supporting, containable of water and ice in the lower compartment and having mounted fans adjacent upper ports of the upper compartment and therebeneath water-circulation conduits and heat-transfer fins with a connected pump mounted also within the upper compartment and circulatable of water from the lower compartment through the water-circulation conduits and heat-transfer fins which are located above air intake ports at a lower location within side walls of the upper compartment structure, with separate variable controls of speed for the separate fans, and with thermostat and manual activation switches in parallel with one-another both in electrical series with a variable speed control of the motor of the pump.

Abstract: Refrigerating apparatus and method including a compressor refrigerating system and an absorber refrigerating system having respective separated closed circuits in operative relationship with respect to one another such that a coolant from the compressor system is usable for cooling a refrigerant of the absorber system. The compressor and absorber system are alternatingly operated to cool a common container with refrigerant store of the absorber system being replenished during operation of the compressor system by boiling out refrigerant from an absorber composition utilizing heat from coolant compressed and heated by a compressor of the compressor system.