An engine waste heat recovery and utilization system using organic working medium as coolant

Abstract

The invention discloses an engine waste heat recycling system utilizing organic working medium as cooling liquid. The engine waste heat recycling system is connected with an engine, a cooling tube in the engine, a power transmission system and a vehicle / ship-mounted fan heater and comprises a turbine, an air-cooled condenser, a liquid storage tank, a cooling liquid circulation pump, a flash evaporator, a throttle valve, an engine waste heat recycling device and first to twelfth solenoid valves. The organic working medium which is free of toxicity and damage to human bodies, is odorless, has no destructive effect or less destructive effect on the atmospheric ozone layer, and is good in thermal transfer, small in gas specific volume and large in steam pressure is selected instead of water to serve as the cooling liquid. By recycling engine cooling heat and engine tail gas waste heat, the temperature of the organic working medium rises to form high-pressure steam which drives the turbine to output power which can drive a vehicle / ship-mounted air conditioner compressor and can also serve as part of the power supplied to the engine. Under the same engine waste heat recycling system, refrigerating, heating and power supply can be switched through a plurality of modes, the energy utilization rate is improved, energy consumption is reduced, and operation cost of automobiles / ships can be reduced.

Description

technical field [0001] The invention relates to an engine waste heat recovery and utilization system using an organic working medium as a cooling liquid, in particular to a comprehensive utilization technology of engine waste heat. Background technique [0002] 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 80-90°C, the exhaust gas takes away 35%-45%, and the effective power of the engine is only 35%-40%. Underused. Therefore, recovery of engine waste heat and comprehensive utilization is a promising way to save energy. At present, the technologies that use engine coolant and engine exhaust waste heat as driving heat sources for cooling and heating mainly include adsorption cogeneration technology and lithium bromide absorption cogeneration technology. The former is limited by the performance of the adsorbent, and the overall perfor...

AI Technical Summary

Problems solved by technology

The former is limited by the performance of the adsorbent, and the overall performance of the refrigeration system is not great; while the latter is difficult to miniaturize the unit, the system is huge, and the space required is large.

On the other hand, the coolant temperature of the engine is low, and water is used as the cooling medium. Although the heat transfer coefficient is relatively high, the evaporation pressure is low and it is difficult to use it directly.

Images