Refrigerating system based on automobile engine exhaust

Abstract

The invention discloses a refrigerating system applicable to automobile engine exhaust. The refrigerating system comprises an evaporator, a working medium pump, an exhaust heat regenerator, a condenser, a screw expander, a compressor, a generator, circulating pipelines, a liquid storage tank, an electric power storage tank and the like. One part takes an exhaust heat source emitted from an engineas the heat source, exhaust emitted by an automobile exhaust pipe heats an organic working medium in the liquid storage tank, the organic working medium is changed into a gaseous state from the liquidstate, then steam is introduced into the expander for acting through a steam pipe, and one part drives the compressor to perform refrigerating; and the other part is brought to the electric power storage tank for energy storage through the turbine generator, so that the compressor operates normally when the engine stops working. The refrigerating system fully recovers heat energy in the automobile exhaust, and the utilization rate is high.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning technology, in particular to CO with exhaust gas from an automobile engine as a heat source. 2 Transcritical cycle refrigeration system. Background technique [0002] With the growth of the economy and the improvement of people's living standards, automobiles have become indispensable in people's daily life. The automobile industry has also become one of the pillar industries of the national economy. People know that the power plant of the automobile is mainly an internal combustion engine, which converts heat energy into kinetic energy through fuel to drive the automobile. However, the current level of technology cannot fully utilize the internal combustion engine to generate About 40% of the heat energy is not fully utilized, and most of it is discharged into the atmosphere through the exhaust pipe in the form of waste heat. During the combustion process of the internal combustion engi...

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Problems solved by technology

The automobile industry has also become one of the pillar industries of the national economy. People know that the power plant of the automobile is mainly an internal combustion engine, which converts heat energy into kinetic energy through fuel to drive the automobile. However, the current level of technology cannot fully utilize the internal combustion engine to generate About 40% of the heat energy is not fully utilized, and most of it is discharged into the atmosphere through the exhaust pipe in the form of waste heat. During the combustion process of the internal combustion engine, the instantaneous temperature can reach 1800 degrees, in less than 0.1 seconds Exhausting the burned gas, the temperature of the exhaust gas in the exhaust pipe can also reach 800 degrees, and the pressure generated by the exhaust gas in the exhaust pipe is very high, and a large amount of heat energy cannot be used, causing huge economic losses and environmental damage.

In order to ensure the normal operation of the engine, the circulating cooling water takes away 30% of the calorific value of the fuel, and the outlet temperature is generally controlled at 350-500°C, the exhaust gas takes away 35%-45%, and the effective power of the engine is only 35%-40%. underutilized

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