08-03-2017, 10:55 AM
Water absorption cooling system that uses the exhaust of an internal combustion engine as an energy source. The energy availability of exhaust gases and the impact of the absorption cooling system on engine performance, exhaust emissions and power economy are evaluated. An automobile production engine was tested on a bench test bench, with the absorption cooling system tailored to the exhaust pipe. The engine was tested for 25%, 50%, 75% and wide open butterfly valve. The refrigerator reached a stable temperature between 4 and 13 ° C approximately 3 hours after system start-up, depending on the throttle valve opening of the engine. The calculated availability of exhaust gas suggests that the cooling capacity can be highly improved for a dedicated system. Exhaust hydrocarbon emissions were higher when the cooling system was installed in the engine exhaust, but carbon monoxide emissions were reduced, while the carbon dioxide concentration remained virtually unchanged.
Steam absorption refrigeration is a system that works with heat. This is older than the steam compression system. In the early 1900's, cooling with this kerosene burner system was very popular. When CFCs were introduced and electric power was cheap, the compression system having a better COP became popular. With the increase in electricity rates and the elimination of CFCs, the absorption system is again popular in large capacities. In both systems we have the evaporator and the condenser. The evaporation and condensation process takes place at two different pressure levels in both systems. They differ in how the evaporator circulates in the system. In contrast to the steam compression system using a mechanical compressor. The type of absorption benefits from an 'absorber' and a 'generator'. A solution called an absorbent having affinity for the refrigerant is used. The absorber in the absorber draws in or draws the refrigerant vapor formed from the evaporator thereby maintaining low pressure in the evaporator to allow the refrigerant to evaporate at low pressure. In the generator, the absorber is heated to release the refrigerant vapor as high pressure vapor, to condense in the condenser.
Video on the use of exhaust gases for the cooling system:
Steam absorption refrigeration is a system that works with heat. This is older than the steam compression system. In the early 1900's, cooling with this kerosene burner system was very popular. When CFCs were introduced and electric power was cheap, the compression system having a better COP became popular. With the increase in electricity rates and the elimination of CFCs, the absorption system is again popular in large capacities. In both systems we have the evaporator and the condenser. The evaporation and condensation process takes place at two different pressure levels in both systems. They differ in how the evaporator circulates in the system. In contrast to the steam compression system using a mechanical compressor. The type of absorption benefits from an 'absorber' and a 'generator'. A solution called an absorbent having affinity for the refrigerant is used. The absorber in the absorber draws in or draws the refrigerant vapor formed from the evaporator thereby maintaining low pressure in the evaporator to allow the refrigerant to evaporate at low pressure. In the generator, the absorber is heated to release the refrigerant vapor as high pressure vapor, to condense in the condenser.
Video on the use of exhaust gases for the cooling system: