Transcritical power cycle mixed working medium

A technology of mixed working fluid and power cycle, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of poor economy of power generation utilization, lack of cycle working fluid, and low power generation economy

Inactive Publication Date: 2010-12-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason why low-temperature resources are less economical for power generation and utilization is that on the one hand, there is a lack of suitable cycle working fluid, and on the other hand, the power generation economics of the subcritical organic Rankine cycle is low

Method used

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  • Transcritical power cycle mixed working medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: take 10 mass % R125 and 90 mass %CO 2 , as a refrigerant after physical mixing at room temperature.

Embodiment 2

[0026] Example 2: Take 50 mass %R125 and 50 mass %CO 2 , as a refrigerant after physical mixing at room temperature.

Embodiment 3

[0027] Embodiment 3: take 90 mass %R125 and 10 mass %CO 2 , as a refrigerant after physical mixing at room temperature.

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Abstract

The invention discloses a transcritical power cycle mixed working medium, which is suitable to be used as a refrigerant of a low-temperature transcritical power cycle system with a resource temperature between 70 and 100 DEG C. The mixed working medium is a binary mixture of five substances, namely R125, R32, R143a, R41 and CO2 in different mass ratios. A preparation method for the mixed working medium comprises a step of physically mixing the components at a normal temperature in a specified ratio to obtain the corresponding mixed working medium. The working medium does not destroy an ozone layer, has low greenhouse effect, meets the environment-friendly requirement, and has proper thermo-technical parameters and good cycle performance. The Rankine cycle efficiency is about 6 percent under a designed working condition, and the net output power of the system is over 9.8kW.

Description

technical field [0001] The invention belongs to refrigerants in heat pumps or air-conditioning systems, in particular to working fluids in low-temperature transcritical power cycle systems with a resource temperature of 70-100°C. Background technique [0002] Research on low-temperature resources (such as low-temperature geothermal energy, waste heat or solar energy) power generation technology is helpful for reducing fossil energy consumption and CO 2 , SO 2 , NO x It is of great significance to achieve sustainable development by reducing the emission of greenhouse gases and environmental pollutants. One of the main technical factors restricting the utilization of low temperature resources for power generation is the system economy. The practice of medium-temperature resource power generation technology shows that the power generation technology based on organic Rankine cycle is more economical. [0003] In recent years, with the increasing challenges brought about by e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
Inventor 王怀信张圣君郭涛
Owner TIANJIN UNIV
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