Bielement medium and high temperature refrigerating work medium suitable for normal temperature water source heat pump

A binary refrigeration and water source heat pump technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems that the normal temperature water source heat pump unit cannot be used, and the HFC-134a heat pump unit cannot be used directly, so as to reduce the impact of the greenhouse effect , Good thermal parameters and good thermal performance

Inactive Publication Date: 2005-08-31
TSINGHUA UNIV +1
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the patent application of publication number CN1425735A, disclose HFC-134a / HCFC-124 / HCFC-142b (mass percentage is respectively 5-50%, 30-90% and 0-60%), wherein the content of HCFC-142b is Selective components, when HCFC-142b is zero, the refrigerant disclosed in the patent application, because its evaporation temperature is 40°C, considering the heat transfer temperature difference, it is only suitable for water sources above 45°C, and cannot be used for normal temperature water source heat pumps In addition, the refrigerant in the disclosed patent application is only used for the heat pump unit of HCFC-22, and cannot directly use the original HFC-134a heat pump unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 71% HFC-134a was physically mixed with 29% HCFC-124 in the liquid phase.

Embodiment 2

[0023] 80% HFC-134a is physically mixed with 20% HCFC-124 in the liquid phase.

Embodiment 3

[0025] 95% HFC-134a is physically mixed with 5% HCFC-124 in the liquid phase.

[0026] Under the design working conditions, that is, the evaporation temperature is 25°C, the condensation temperature is 75°C, the subcooling temperature is 5°C, and the superheating temperature is 5°C, the thermal properties of the refrigerants in the above examples are listed in Table 1. Table 1 also lists the parameters of HFC-134a for comparison. It can be seen from Table 1 that compared with HFC-134a, the condensing pressure is lower, the exhaust temperature is equivalent, the COP and heat supply under heating conditions are equivalent, and the volumetric heat supply is roughly equivalent, indicating that the existing HFC-134a can be fully utilized The 134a heat pump unit can provide hot water at about 70°C under normal temperature water source conditions (about 30°C), which is used for heating or other applications that require hot water at about 70°C. (around 30°C) can not provide hot wate...

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Abstract

A medium-and high-temp 2-element refrigerant suitable for the heat pump of ordinary-temp water source at 30 deg.c to provide hot water at 70 deg.c contains 1,1,1,2-tetraethane (HFC-134a) and 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124). Its advantages are no poison, incombustible and better thermodynamic properties.

Description

technical field [0001] The invention relates to a refrigerant, in particular to a binary medium-high temperature refrigerant working medium suitable for a normal temperature water source heat pump. Background technique [0002] Water source heat pump technology uses geothermal water, groundwater, surface water (river water, lake water, sea water), industrial waste water and other low-temperature and low-level thermal energy resources, and adopts the principle of heat pump to transfer low-level heat energy to high-level heat energy through a small amount of electric energy input, so as to realize power supply. An energy-saving and environmentally friendly technology for heating and cooling. The water source heat pump has the characteristics of high efficiency and energy saving, stable and reliable operation, remarkable environmental benefits, and one machine with multiple functions. Because water source heat pumps have high efficiency, are almost not affected by the ambient ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/04
Inventor 史琳朱明善韩礼钟朱秋兰董明
Owner TSINGHUA UNIV
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