Middle and high temperature heat pump mixed working medium containing HFC245fa

A technology of mixed working fluid and high temperature heat pump, applied in the field of refrigeration working fluid, can solve the problems of inability to provide heat energy, deteriorating cycle performance, easy to cause accidents, etc., and achieve the effects of excellent environmental characteristics, reducing the greenhouse effect, and protecting the ozone layer.

Inactive Publication Date: 2006-06-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used air-conditioning-heat pump systems use HCFC22 or its substitutes R407C, R410A, etc. as the working fluid. The upper limit of pressure and discharge temperature of the system is easy to cause accidents), and cannot provide heat energy at a higher temperature level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: get 16 mass %HFC134a, 35 mass %HFC152a, 49 mass %HFC245fa, used as a refrigerant after physical mixing at room temperature.

Embodiment 2

[0013] Embodiment 2: get 31 mass %HFC134a, 23 mass %R13I1, 46 mass %HFC245fa, used as a refrigerant after physical mixing at room temperature.

Embodiment 3

[0014] Embodiment 3: take 8 mass %HFC152a, 70 mass %R13I1, 22 mass %HFC245fa, used as a refrigerant after physical mixing at room temperature.

[0015] If the design working conditions of the heat pump system are taken as follows: the average evaporation temperature is 40°C, the average condensation temperature is 90°C, and the suction superheat temperature is 5°C (for some working fluids, an appropriate exhaust superheat is taken to avoid wet compression) , the subcooling temperature is 5°C, and the constant entropy efficiency in the compression process is 75%. According to cycle calculation, the relevant parameters and cycle performance indicators of the above three embodiments are shown in Table 2.

[0016] Parameters and performance

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PUM

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Abstract

The mixed middle and high temperature heat pump working medium containing HFC245FA is suitable for use as refrigerant in middle and high temperature heat pump system of condensing temperature 60-120 deg.c. The mixed working medium contains four kinds of matter, R13I1, HFC245fa, HFC134a and HFC152a in different mass proportions to constitute binary and ternary mixtures. The mixed working medium is prepared through mixing the components in designated proportion physically at normal temperature. The present invention has no damage on ozone layer, very low green house effect potential, proper thermotechnical parameters and excellent circulation performance, and may be used in middle and high temperature heat pump system of new and available HCFC22 air conditioner compressor.

Description

[0001] The present invention is a divisional application of "a group of medium and high temperature heat pump mixed working fluids containing HFCs and HCs", the filing date is April 5, 2004, the application number is 200410018832.2, and the name of the invention is "a group of working fluids containing HFCs and HCs" Medium and high temperature heat pump mixed working fluid". technical field [0002] The invention belongs to refrigerants in heat pumps or refrigeration and air-conditioning systems, and particularly relates to refrigerants used as refrigerants in medium-high temperature heat pump systems with a condensation temperature of 60-120°C. Background technique [0003] For the energy-consuming links that exist in large numbers in production and life and require relatively low thermal energy grades (temperature is 60-160°C), the use of heat pump heating technology not only has a higher total energy utilization e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
Inventor 王怀信马利敏郑臣明张宇杨强
Owner TIANJIN UNIV
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