Semiconductor temperature difference power generation system

Abstract

The invention discloses a semiconductor temperature difference power generation system, which comprises phase-change heat transfer structures and temperature difference power generation modules; each phase-change heat transfer structure is composed of an evaporating section and a condensing section, and working medium with high heat absorption capacity and less useful energy loss within a temperature range, which is chosen according to the optimal working temperature of thermoelectric material, is filled in the pipeline of the evaporating section; the phase-change heat transfer structures comprise a high-temperature phase-change heat transfer structure, a medium-temperature phase-change heat transfer structure and a low-temperature phase-change heat transfer structure; the thermoelectric materials with different optimal working temperatures, which correspond to the evaporating sections, are also chosen by the temperature difference power generation modules; thermoelectric material hot ends cling to the surfaces of the condensing sections, and thermoelectric material cold ends cling to the wall surfaces of cooling passages. The invention broadens the useable range of the phase-change heat transfer structures in the whole process of heat transfer, reduces the temperature difference between a heat source and a generator, and increases the energy utilization rate of the system, and the semiconductor temperature difference power generation system is mainly used for supplying electric energy to an automobile power system.

Description

technical field [0001] The invention relates to a semiconductor power generation device, in particular to a semiconductor thermoelectric power generation system which recycles the heat energy of waste vehicle exhaust and combines a heat exchange system with a thermoelectric power generation system. Background technique [0002] Thermoelectric power generation technology is a technology that directly converts thermal energy into electrical energy by using the Seebeck effect of semiconductor materials. With the increase of social and economic demand for energy, energy shortage, waste and environmental pollution are becoming more and more serious. The semiconductor power generation device has the characteristics of no vibration, no noise, compact structure, environmental protection and long service life. The volume can be large or small, and the efficiency is basically not affected by the volume. Using it to recover various waste heat can reduce the pollution and waste caused ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing phase-change heat structure using a single working fluid, and the heat transfer is limited by the working temperature range of the working medium, which makes the entire system less efficient. The phase-change heat of the phase-change heat working medium expands the use range of the phase-change heat transfer structure in the entire heat transfer process, so as to reduce the heat loss in the heat transfer process and improve the energy utilization rate. Add a corresponding phase-change heat unit between the exhaust channel and the high-temperature heat source of the thermoelectric material, and use thermoelectric materials with different optimal operating temperatures as the thermoelectric conversion material, a semiconductor thermoelectric power generation system using automobile exhaust as a high-temperature heat source

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