Automobile engine tail gas waste heat thermoelectric conversion control method

Abstract

The invention discloses an automobile engine tail gas waste heat thermoelectric conversion control method, and relates to the technical field of thermoelectric conversion. The method comprises a generator module, a temperature detection module, a temperature difference power generation module, an output energy storage module and a control processing module. The engine module sends state information of an engine to the control processing module; the temperature detection module transmits engine tail gas temperature information to the control processing module; the processing control module controls starting of the thermoelectric power generation module and discharging and storing of the output energy storage module. The processing control module sends conversion control information to the thermoelectric conversion module. Herein, other modules are controlled through the control processing module, and the temperature in engine tail gas is monitored in real time through the temperature monitoring module; tail gas is pressurized or decompressed through the air pressure intensifier, so that the tail gas reaches the optimal conversion state; meanwhile, the heat dissipation speed in the device can be slowed down through the heat insulation layer and the heat insulation gasket, and the conversion efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric conversion, in particular to a method for controlling thermoelectric conversion of waste heat of automobile engine exhaust. Background technique [0002] At present, there are about 800 million vehicles in the world, most of which are ordinary fuel internal combustion engine vehicles, and the heat generated by the combustion of fuel in the engine is not all converted into kinetic energy, and the power conversion efficiency of the car is only about 40%. As much as 60% of the energy is not effectively utilized, among which the heat taken away by the engine exhaust accounts for about 30% to 45% of the fuel combustion heat, and the heat used for cooling accounts for about 30%. The form is lost into the air, resulting in a huge waste of energy and serious environmental pollution. [0003] Although the waste heat thermoelectric power generation device of automobile exhaust can recover part of th...

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Problems solved by technology

[0002] At present, there are about 800 million vehicles in the world, most of which are ordinary fuel internal combustion engine vehicles, and the heat generated by the combustion of fuel in the engine is not all converted into kinetic energy, and the power conversion efficiency of the car is only about 40%. As much as 60% of the energy is not effectively utilized, among which the heat taken away by the engine exhaust accounts for about 30% to 45% of the fuel combustion heat, and the heat used for cooling accounts for about 30%. The form is lost into the air, resulting in a huge waste of energy and serious environmental pollution

[0003] Although the waste heat thermoelectric power generation device of automobile exhaust can recover part of the waste heat in the exhaust, the conversion efficiency is not high, only ranging from tens of watts to hundreds of watts, and the input cost is not proportional to the recovery. In the process of power generation with waste heat, thermoelectric conversion Mainly faced with these two problems, one: the material of thermoelectric power generation determines whether there is secondary consumption of heat energy during the transfer process and whether the conductivity of heat energy is good in the process of converting heat energy into electric energy; two: the connection of thermoelectric power generation materials Method, choose different connection methods, and finally conduct electricity to form a circuit The electric energy generated and the electric energy consumed in the conduction process have an extremely important relationship with the connection method. These two points are issues that need to be considered in thermoelectric power generation.

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