Low-temperature heat engine device

Abstract

The invention belongs to the technical field of heat engines and particularly relates to a low-temperature heat engine device which comprises a control system, a phase change working system, a heat absorber, a compression cooling and depressurization system and a pressurization system, wherein the heat absorber, the phase change working system, the compression cooling and depressurization system and the pressurization system are controlled by the control system and are sequentially connected to form a loop capable of absorbing heat in the environment temperature smaller than 100 DEG C and capable of performing phase change working, and the loop contains mixed dielectric gases. Compared with the prior art, gas phase change working is performed so that output power of the systems is remarkably increased. In the working process of the systems, the gases are liquefied after phase change working so that in the circulating process of the systems, not massive external work is needed to be consumed to liquefy the gases through a compressor. Most consumed matters in the balance exchange process of the pressurization system are cold capacity generated by the dielectric gases in the process. Therefore, output power of the systems is remarkably increased, consumed external work is remarkably reduced, and the low-temperature heat engine device can be achieved completely.

Description

technical field [0001] The invention belongs to the technical field of heat engines, and in particular relates to a low-temperature heat engine device. Background technique [0002] In the existing technology, there is no product that can absorb heat from the environment below 100°C and convert it into useful work. Although the invention patent application with the application number CN201110279848.9 discloses a "transcritical low-temperature air power generation device", a careful analysis of its technology shows that no phase change occurs when the transcritical gas does work, that is to say Most of the internal energy of the gas has not been converted into mechanical energy, so the unit output power is very small, and the phase change (liquefaction) of the gas is realized by the compression of the compressor, which requires a lot of external work, and the working fluid When entering the high-pressure end, a booster pump is used, which also consumes a lot of external powe...

AI Technical Summary

Problems solved by technology

Although the invention patent application with the application number CN201110279848.9 discloses a "transcritical low-temperature air power generation device", a careful analysis of its technology shows that no phase change occurs when the transcritical gas does work, that is to say Most of the internal energy of the gas has not been converted into mechanical energy, so the unit output power is very small, and the phase change (liquefaction) of the gas is realized by the compression of the compressor, which requires a lot of external work, and the working fluid When entering the high-pressure end, a booster pump is used, which also consumes a lot of external power. Overall, the total output power of the system is not as much as the power consumed. Therefore, it is actually difficult to realize the technology disclosed in this invention application.

[0003] According to the inventor's analysis and practice, the thermal power device in the prior art cannot break through the following technical difficulties, so that it cannot convert heat in an environment below 100°C into useful work:

[0004] First, the working medium gas cannot undergo phase change (liquefaction) through work, that is, it does not output the maximum volume work (because the gas can only output the maximum volume work when it undergoes a phase change), so the net output power is low;

[0005] Second, the medium gas needs to be pressurized by compressors, booster pumps, etc. to circulate, and it also needs to consume a lot of external work;

[0006] Third, none of the existing expanders can work with a large amount of liquid

[0007] Fourth, existing expanders and compressors have low mechanical efficiency

[0008] In summary, the existing technology is that high-pressure gas can do work, but it cannot do large volume work, and the external work consumed by the gas cycle is greater than the output power of the gas

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