Calculation method of net output power of a water-cooled vehicle-mounted thermoelectric power generation system

Abstract

The invention discloses a calculation method of the net output power of a water-cooled vehicle-mounted thermoelectric power generation system, which is used for evaluating the output performance of the vehicle-mounted thermoelectric power generation system. A water-cooled vehicle-mounted thermoelectric power generation system is composed of a heat exchanger, a thermoelectric fin and a radiator. When tail gas flows through the heat exchanger and cooling water flows through the radiator, a temperature difference is formed at both ends of the thermoelectric fin, thereby generating electric energyfor supplying power to a load; However, when the on-board thermoelectric power generation system generates electric energy, the weight of its own structure will cause additional gravity loss of the vehicle. In addition, the tail gas flow through the heat exchanger and cooling water flow through the radiator will also increase the resistance of fluid flow, resulting in pump energy loss. Therefore,the invention calculates the output power, the gravity loss, the tail gas pump energy loss and the cooling pump energy loss of the thermoelectric power generation system respectively, and finally obtains the net output power. According to the net output power, it is of great practical value to quantitatively evaluate the output performance of the vehicle-mounted thermoelectric power generation system.

Description

technical field [0001] The invention belongs to the field of waste heat recovery from vehicle tail gas, and in particular relates to a method for calculating the net output power of a water-cooled vehicle-mounted thermoelectric power generation system, which is used to evaluate the output performance of the vehicle-mounted thermoelectric power generation system. Background technique [0002] Thermoelectric power generation refers to a technology that uses the effect of the semiconductor PN junction made of thermoelectric materials to move directionally under the action of temperature difference to generate current, and to recover heat energy. The thermoelectric power generation system consists of three structures: the hot end heat exchanger, the cold end radiator, and the thermoelectric power generation sheet sandwiched in the middle. It has many advantages, such as simple structure, no complicated moving parts, no pollution, no noise, and long life. and directly convert the...

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Problems solved by technology

However, few scholars comprehensively consider the additional loss caused by the installation of the thermoelectric generator on the vehicle. Even if the pump energy loss of the thermoelectric generator is considered, the determination of the pressure difference is obtained by using experimental means, and no specific information is given. The theoretical calculation formula of

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