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Hydrofluorocarbon refrigerant composition for heat pump water heater

A heat pump water heater and refrigerant technology, applied in fluid heaters, heat exchange materials, chemical instruments and methods, etc., can solve problems such as unsatisfactory capacity and efficiency, reduced capacity, and small production capacity

Inactive Publication Date: 2010-11-10
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

HFC-134a can supply 60-65℃ hot water at low discharge temperature and pressure, but its capacity is very small and a large compressor is required
In addition, when the ambient temperature is lower than 5°C, its ability is greatly reduced
HFC-417A is very popular because the discharge temperature and pressure are very safe for existing compressors (discharge pressure exceeds 28MPa). As a refrigerant for heat pump water heater units, it can provide 60-65°C hot water, so it is very popular and efficiency is not ideal

Method used

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  • Hydrofluorocarbon refrigerant composition for heat pump water heater
  • Hydrofluorocarbon refrigerant composition for heat pump water heater
  • Hydrofluorocarbon refrigerant composition for heat pump water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Comparison of selected compositions R134a / R125 / R143a with other working fluids.

[0046] In one embodiment of the composition, the weight percentages of the components are as follows: HFC-134a about 52%, HFC-125 about 24%, HFC 134a about 24%. (This embodiment is designated HPWH-20.) The prefix "R" and the prefix "HFC" used herein are interchangeable when describing different compositions.

[0047] In another embodiment of the composition, the weight percentage of the composition is as follows: about 50% of HFC-134a, about 24% of HFC-125, and about 26% of HFC-143a.

[0048] In another embodiment of the composition, the weight percentage of the composition is as follows: about 48% of HFC-134a, about 24% of HFC-125, and about 30% of HFC-143a.

[0049] The following are the working fluids used for comparison under the above working conditions

[0050] ASHRAE code

combination

R22

R22(100％)

R407C

R134a / R125 / R32 (52% / 25% / 23%)

R417A...

Embodiment 2

[0057] Further analysis of the evaluation performed in Example 1 showed that R134a had better efficiency than HPWH-20 ( Figure 4 ),but Figure 5 It shows that the heating capacity of HFC-134a is very low. To make up this capacity, the manufacturer will need new compressors and possibly larger heat exchangers. Overall, the performance of HPWH-20 is superior.

Embodiment 3

[0059] Glide generally describes the potential of a blend to fractionate. Some blends such as HFC-407C have higher fractionation potential and can glide up to 3.3°C. Some other blends such as HFC-417A have lower slip (as shown in the table below), which is a desired characteristic. HPWH-20 has even lower slip, which means lower potential for fractionation.

[0060] The refrigerant

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PUM

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Abstract

A hydrofluorocarbon refrigerant composition ensures the existing compressor technique to be applied to the field of the heat pump water heater reliably (low exhaust temperature and pressure) and high efficiently (high productability and efficiency). On one hand, the refrigerant includes an admixture of HFC-125, HFC-134a and HFC-143a. On the other hand, the refrigerant includes an admixture of HFC-125, HFC-32, HFC-134a and HFC-143a.

Description

technical field [0001] The present invention generally relates to compositions for use as refrigerants. More specifically, the present invention relates to hydrofluorocarbon refrigerant compositions for use in heat pump water heater systems. Background technique [0002] Hot water is widely used in family residences, commercial buildings, heating industry, bathing, industrial processing, etc. Gas boilers and electric heaters are mainly used to supply hot water. A heat pump water heater (HPWH) is another device that supplies hot water. Since HPWH uses renewable energy as a heat source and has a low environmental impact, its use in domestic and light commercial applications is growing rapidly. [0003] Such as figure 1 As shown, the heat pump water heater device (HPWH) mainly includes a system composed of a compressor 1 , a condenser 2 , an expansion device 3 and an evaporator 4 . The evaporator can be an air source type or a water source type. A working fluid (refrigera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04F24H4/02
Inventor S·F·亚纳莫塔Z·卢M·W·斯帕茨M·曹A·孙L·钱
Owner HONEYWELL INT INC
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