Single-module independent water-cooled type automobile tail gas thermoelectric conversion device and method

Abstract

The invention relates to a single-module independent water-cooled type automobile tail gas thermoelectric conversion device and method. The device consists of a thermoelectric conversion unit and a voltage polling unit and is characterized in that: an engine exhausts high-temperature tail gas; in a plurality of thermoelectric conversion modules of the thermoelectric conversion unit, the hot ends absorb the heat of the high-temperature tail gas and the cold ends cling to an independent small water tank; the temperature difference between the hot ends and the cold ends is increased by cooling water of a cooling device of the engine or a cooling water loop designed externally and independently, so that direct-current electric energy is generated; the voltage polling unit detects the direct-current voltage generated by each thermoelectric conversion module; and optimal series and parallel combination is performed according to the output characteristic of each thermoelectric conversion module, so that output power and conversion efficiency of the automobile tail gas thermoelectric conversion device can be improved to the maximum degree. The temperature difference between the hot ends and the cold ends is increased by the single-module independent water-cooled mode; the heat of the waste gas exhausted by the automobile is effectively utilized; and the generated electric energy is applied to vehicle-mounted equipment, so energy conservation and emission reduction of the automobile are facilitated.

Description

technical field [0001] The invention belongs to an automobile exhaust thermoelectric conversion device and method, in particular to a single-module independent water-cooled automobile exhaust thermoelectric conversion device and method. Background technique [0002] The rapid development of my country's automobile industry has become the world's largest automobile producer and the second largest energy consumer. With the rapid development of the economy, the demand for fossil energy has increased sharply. However, my country's fossil energy mainly relies on the energy supply of the international market. Today, the world's fossil energy is increasingly scarce, and the development of new energy and alternative energy or high-efficiency traditional energy has become the focus of research in countries all over the world. [0003] At present, the global energy crisis is deepening, automobile exhaust pollution, global warming is increasing, and automobile energy saving and emission...

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Problems solved by technology

[0003] At present, the global energy crisis is deepening, automobile exhaust pollution, global warming is increasing, and automobile energy saving and emission reduction have become the focus of attention of all countries in the world. Up to 60% of the energy in automobile fuel has not been effectively used, and about 40% of it is Energy is discharged into the air in the form of waste heat, which not only causes a huge waste of energy but also aggravates the pollution of the environment. If this part of the waste heat of automobile exhaust can be used, it will produce good social benefits and broad market prospects

In recent years, developed countries such as the United States, Japan, and Europe have achieved certain results by using thermoelectric conversion technology to convert waste heat into electrical energy, and applying it to automobile engines to achieve vehicle exhaust waste heat power generation, but the conversion efficiency and output power are low. Using the method of integrated control of the temperature of the cold end of the thermoelectric conversion module, the contact between the surface of the cold end of the thermoelectric conversion module and the surface of the cooling equipment is not scientific and reasonable, resulting in a large amount of heat accumulation at the cold end of the thermoelectric conversion module, resulting in insufficient establishment of the temperature difference between the cold and hot ends of the thermoelectric conversion module Obviously, the output power and overall thermoelectric conversion efficiency of the device are small, and the electricity generated can only be used by part of the vehicle equipment, so the economic benefit is low and the cost recovery period is too long, so it is difficult to carry out market promotion and industrialization. The comprehensive benefit advantage of emission reduction is not obvious

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