Engine waste heat recycling system

Abstract

The invention discloses an engine waste heat recycling system. The engine waste heat recycling system includes an engine, an intercooler, an exhaust gas aftertreatment device, a heating radiator and awater tank heat exchanger. The engine is provided with a pressurizer. The engine waste heat recycling system further includes an air inlet waste-heat heat exchanging device and a water pump, whereinthe air inlet waste-heat heat exchanging device is arranged on a communicating air channel between the rear side of the pressurizer and the intercooler, a water inlet of the air inlet waste-heat heatexchanging device communicates with a water outlet of the engine, and a water outlet of the air inlet waste-heat heat exchanging device communicates with a water inlet of the heating radiator and / or awater inlet of the engine; and the water pump is used for circulating cooling liquid in the air inlet waste-heat heat exchanging device, the heating radiator and the engine. According to the engine waste heat recycling system, except the fact that waste heat of the cooling water of the engine is used, waste heat of air which enters the intercooler after the pressurizer is also recycled through the air inlet waste-heat heat exchanging device, and the waste heat is used for fast vehicle heating and air-conditioning heating. The engine waste heat recycling system improves the utilization ratio of the engine waste heat, satisfies demands of fast vehicle heating and air-conditioning heating of a vehicle in the cold season and a high cold area.

Description

technical field [0001] The invention relates to the technical field of engine waste heat utilization, in particular to an engine waste heat recycling system. Background technique [0002] According to research, only 35-45% of the fuel combustion heat of supercharged and intercooled diesel engines is converted into effective work and output by the crankshaft, and the remaining heat is taken away by about 30% of the engine exhaust gas, 20-30% by the engine circulating coolant, and About 5% is taken away by the cooler and lost through different forms such as radiation and convection. [0003] In order to effectively utilize the waste heat of the engine, the waste heat of the engine circulating coolant is usually used to warm up the engine and heat the vehicle air conditioner. Generally speaking, the ideal temperature of the engine circulating coolant is in the range of 75°C to 95°C. [0004] However, for some vehicles, in cold seasons and alpine regions, existing engine waste...

AI Technical Summary

Problems solved by technology

[0004] However, for some vehicles, in cold seasons and alpine regions, existing engine waste heat utilization methods cannot meet the needs of engine warm-up and vehicle air-conditioning heating at the same time

Therefore, these vehicles are equipped with independent combustion heating devices, and the circulating medium is heated through the combustion of additional fuel to meet the needs of heating and fast warming in alpine regions. However, this method increases fuel costs.

[0005] In summary, how to solve the problem that the vehicle cannot meet the needs of rapid warm-up and air-conditioning heating in cold seasons and high-cold regions has become an urgent problem to be solved by those skilled in the art

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