Working material for absorption machines using ammonia (NH.sub.3) or methylamine (CH.sub.3NH.sub.2) or dimethylamine ((CH.sub.3).sub.2NH) as the working agent and using water (H.sub.2O) as the solvent, to which a small amount of basic water glass is added, i.e., a certain mixture of water glass and bases, which does not contain any chromium salts as corrosion inhibitors.

An absorption cycle based system is disclosed for using waste heat from a vehicle and providing selective heating, cooling, and dehumidifying to a vehicle compartment. The system includes a waste heat loop in thermal communication with a power generating unit of the vehicle, and a vapor absorption subsystem. The vapor absorption subsystem may include a thermal compressor in thermal communication with the waste heat loop, a radiator unit, a condensing unit for heating the vehicle compartment, an evaporating unit for selectively cooling and dehumidifying the vehicle compartment, and a plurality of valves configured to selectively direct refrigerant through the vapor absorption subsystem. The vehicle compartment may include at least one of a passenger cabin, an electronics housing, a battery pack, an engine compartment, and a refrigeration compartment.

A refrigeration and/or heat transfer device includes a heating section and cooling section, a release member, and a one-way check valve affixed together in a continuous loop so working fluid may flow in one direction therein. The heating section absorbs heat and transfers such heat to the working fluid, thereby heating, expanding and increasing pressure upon the working fluid therein. The pressurized working fluid is released in a regulated manner from the heating section to the cooling section, thereby carrying the heat away. The released working fluid cools and transfers its heat to the surroundings within the cooling section. As released working fluid enters the cooling section, such fluid displaces already cooled working fluid, pushing such fluid through the one-way check valve back into the heating section to absorb heat. The working fluid may undergo a phase change or remain in a single phase throughout to enhance heat transfer.

A refrigeration and/or heat transfer device includes a heating section and cooling section, a release member, and a one-way check valve affixed together in a continuous loop so working fluid may flow in one direction therein. The heating section absorbs heat and transfers such heat to the working fluid, thereby heating, expanding and increasing pressure upon the working fluid therein. The pressurized working fluid is released in a regulated manner from the heating section to the cooling section, thereby carrying the heat away. The released working fluid cools and transfers its heat to the surroundings within the cooling section. As released working fluid enters the cooling section, such fluid displaces already cooled working fluid, pushing such fluid through the one-way check valve back into the heating section to absorb heat. The working fluid may undergo a phase change or remain in a single phase throughout to enhance heat transfer.