Self-cooled thermodynamic cycle method

A thermodynamic cycle and self-cooling technology, applied in heat pumps, refrigerators, refrigeration components, etc., can solve the problems of implementation methods and application field limitations, and achieve the effects of low cost, improved practicability, and high heat and mass transfer efficiency

Inactive Publication Date: 2018-01-19
张玉良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its limitation is that the exhaust heat of the heat pump that recovers the exhaust heat first enters the expansion process, and then passes through the heat recovery process together with the system waste heat to transfer to the heating process, so it is at least limited in terms of implementation methods and application fields

Method used

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Examples

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Embodiment approach 1

[0016] Embodiment 1, a self-cooling thermodynamic cycle using an independent heat pump:

[0017] Such as figure 1 Shown is a self-cooling thermodynamic cycle that uses an independent heat pump process. After cooling or liquefaction by the heat pump heat absorbing heat exchanger 15 (for simplicity, the dotted line represents the heat exchange process, which has nothing to do with the heat exchanger structure, the same below), the heat The low-temperature working medium of the system completes the pressure boosting process through the pump 14, and after the pressure boosting, it passes through the heat pump process heat exchanger 13 and the heat recovery heat exchanger 12 to complete the preheating process, and completes the process of absorbing heat from the heat source through the heat source heater 11 to make the working medium become The power gas source, the power gas source enters the expansion work device 18, and the low-temperature gas working medium that completes the e...

Embodiment approach 2

[0022] Embodiment 2, regenerative heat pump

[0023] as attached Figure 4 A self-cooling thermodynamic cycle using a regenerative heat pump is shown in the attached figure 1 On the basis of the heat pump process, the heat recovery process is added before and after the booster device. The heat recovery process uses a heat recovery heat exchanger 16, and the heat exhaust heat exchanger and the heat recovery heat exchanger arranged on the outlet pipeline of the booster device are arranged in parallel to exchange heat synchronously. , can also be alternately arranged multiple times on the same pipeline for heat exchange.

[0024] as attached Figure 5 Shown is a self-cooling thermodynamic cycle using a heat recovery heat pump. The heat pump process uses a jet cyclone heat pump, and the heat pump booster 17 provides injection power for the jet cyclone 21 to realize the cooling of the system working fluid. Refrigeration and liquefaction become jet refrigeration and liquefaction ...

Embodiment approach 3

[0025] Embodiment 3, open self-cooling thermodynamic cycle

[0026] as attached Figure 7 In the open self-cooling thermodynamic cycle shown, a multi-stage compressor 31 is used in the boosting process, a compressor 35 is used in the heat pump process, and an expander 34 is added to recover the expansion work after heat exchange in the heat pump process. The low-temperature gas that comes out is sent to the cooling device 32 of the multi-stage compressor in the step-up process (for simplicity, only the dotted line represents the heat transfer process) to provide a cold source for it. Obviously, when the temperature of the heat pump gas coming out of the cooling device 32 is close to the ambient temperature, it is equivalent to transferring the exhaust heat of the multi-stage compressors in the boosting process to the preheating process through the heat pump, which is an open heat pump cycle. The working medium of the open thermal cycle is directly air or flue gas (for example...

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Abstract

The invention discloses a self-cooled thermodynamic cycle method and belongs to the field of thermal energy power. The working medium of a thermodynamic system absorbs heat from a heat source to applywork after boosting. The self-cooled thermodynamic cycle method comprises the following steps: the boosting process of the working medium from the low-temperature state, the preheating process afterboosting, the heat absorption process from the heat source enabling the working medium to become a power air source, the expansion work applying process of the power air source after entering into anexpansion work-applying system, the further heat release and heat discharging process of the low-temperature air working medium after expansion work applying and the thermodynamic cycle realizing process; a thermodynamic cycle system adopts open cycle or closed cycle; the heat pump adopting process absorbs all or part of heat released by the working medium during the heat discharging process; thepreheating process directly or indirectly absorbs all or part of heat discharged during the heat pump process; a heat returning process can be adopted between the heat discharging process and the preheating process; and the thermodynamic system recycles all or part of heat discharged during the heat discharging process through the heat pump process and the heat returning process.

Description

technical field [0001] The invention belongs to the field of thermal power. Background technique [0002] In the field of thermodynamics, the reversible Carnot cycle has always been considered to have the highest thermal efficiency. However, compared with the Rankine cycle, the adiabatic compression process of the Carnot cycle cannot realize the regenerative cycle, and the regenerative cycle can improve the thermal efficiency. Especially in the supercritical Rankine cycle, the supercritical liquid working medium and gas working medium can not only absorb low-temperature exhaust heat through the regenerative cycle, but also have a specific heat much larger than that of the normal pressure gas working medium, that is, the supercritical Rankine The energy-saving potential of the regenerative capacity during cyclic constant-pressure heating has been neglected. Invention patent application CN201310497436.1 (publication number CN103775148A) made good use of this potential, and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K25/00F25B30/00
Inventor 张玉良
Owner 张玉良
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