An automobile exhaust air temperature difference power generation system, its cooling method and the method for controlling the exhaust gas flow

Abstract

The invention discloses an automobile exhaust temperature difference power generation system, a cooling method thereof and an exhaust gas flow controlling method. A heat collecting system controls the hot end temperature of a temperature difference power generation device through an electronic control unit, so as to realize exhaust gas shunt. The temperature difference power generation device forms temperature difference on both ends of a temperature difference power generation material (the hot end formed by exhaust gas and the cold end formed by a cooling system cooling the temperature difference power generation material) to generate electric power. The cooling system cools the cold end by through air cooling and water cooling control. A temperature protection system protects the temperature difference power generation system when valve connected with a condenser pipe is fully opened (an electronic control unit controls the closing of a valve connected with a collector). A DC-DC control circuit integrates unstable open circuit voltage generated by the temperature difference power generation device to acquire constant output power and charge a battery. The battery powers a vehicle-mounted electric appliance on occasion.

Description

technical field [0001] The invention provides a novel automobile exhaust gas temperature difference power generation device and a method for cooling and controlling the flow of exhaust gas, and belongs to the technical field of energy recovery and utilization of automobile exhaust gas. Background technique [0002] Existing automobile is in running process, and the energy that fuel combustion produces has at most only about 25-30% and can be converted into the kinetic energy that drives automobile to travel, and remaining about 70% energy passes through forms such as tail gas discharge (wherein about 40% energy is with tail gas Exhaust) into the atmosphere, resulting in huge energy loss and serious environmental pollution. [0003] The thermoelectric power generation device is a power generation technology developed based on the Seebeck effect of thermoelectric materials. It connects two different types of thermoelectric materials (P type is a hole-rich material and N type i...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an automobile exhaust temperature difference power generation system and its cooling method, which solves the problem of damage to the hot end of the thermoelectric power generation device due to excessively high temperature by adopting the method of controlling the exhaust gas flow; and Water cooling and air cooling are used as the working mode of the cooling system, which improves the efficiency of the thermoelectric power generation system and fully improves the utilization rate of waste gas energy

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