An adsorption refrigeration device driven by engine exhaust gas

Abstract

The invention provides an adsorption refrigeration device driven by engine exhaust gas. The adsorption refrigeration device comprises a condenser, an evaporator, a high temperature salt adsorption bed and a medium temperature salt adsorption bed which are connected successively to form a refrigerant circulating flow loop. Finned tubes of the high temperature salt adsorption bed are filled with manganese chloride / sulfide expanded graphite composite adsorbents and finned tubes of the medium temperature salt adsorption bed is filled with calcium chloride / sulfide expanded graphite composite adsorbents. Engine exhaust gas is conveyed into the high temperature salt adsorption bed and the medium temperature salt adsorption bed via air and exhaust gas pipes and is discharged to the external environment after heat exchange with the finned tubes of the high temperature salt adsorption bed and the medium temperature salt adsorption bed. The air and exhaust pipes of the high temperature salt adsorption bed and the medium temperature salt adsorption bed lead to the external air through branches. The adsorption refrigeration device is suitable for refrigerator trucks; heat in the engine exhaust gas of the refrigeration trucks can be used for driving the adsorption refrigeration device to obtain cold energy and achieve a refrigerating effect. The adsorption refrigeration device is suitable for more severe working conditions.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an adsorption refrigeration device driven by exhaust gas from an engine. Background technique [0002] Adsorption refrigeration, as a green and environmentally friendly technology that can be driven by low-grade heat energy (such as engine exhaust, geothermal energy, etc.), has attracted more and more attention from researchers. Adsorption refrigeration system is mainly composed of adsorption bed, evaporator and condenser. Adsorption refrigeration generally includes two processes: (1) cooling adsorption process, which uses cooling water or air to cool the adsorption bed, so that the adsorbent in the adsorption bed Adsorb the refrigerant in the evaporator, and the refrigerant evaporates in the evaporator to generate cold energy; (2) Heating and desorption process, which uses low-grade heat energy to regenerate the saturated adsorbent, that is, to separate the refrigerant fro...

AI Technical Summary

Problems solved by technology

Considering that the engine exhaust has relatively high heat and high temperature, if the engine exhaust is discharged directly, it will inevitably lead to waste of heat, so an adsorption refrigeration device driven by automobile exhaust is proposed, such as figure 1 The shown set of zeolite-water adsorption air-conditioning system driven by the waste heat of diesel locomotive flue gas, the field operation shows that the adsorption waste heat air-conditioning system can basically meet the needs of air-conditioning in the cab of locomotives except for slow train conditions. The circulation mode achieves continuous cooling. For typical working conditions, the cooling capacity of the system is 3.0-4.2 kW, and the evaporation temperature is about 10°C. This system meets the air conditioning working conditions, but cannot meet the refrigeration working conditions, that is, it cannot meet the refrigeration conditions. car refrigeration needs

[0003] With the improvement of people's living standards, the requirements for food quality are also higher, so that food preservation and refrigeration become more important, so refrigerated trucks came into being. Traditional refrigerated trucks use vapor compression refrigeration systems. In order to ensure the continuous refrigeration of refrigerated vehicles, a certain amount of engine shaft power is consumed, which increases the exhaust emissions of refrigerated vehicles, causing air pollution and the greenhouse effect

[0004] As mentioned above, the adsorption refrigeration system driven by engine exhaust gas, the evaporation temperature can only reach 10°C, which cannot meet the refrigeration needs of the refrigerated truck during transportation, and the evaporation temperature needs to reach -10°C

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