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Green intermediate and high temp. working medium

A high-temperature heat pump and green synthesis technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as hydrocarbons hindering applications

Inactive Publication Date: 2003-05-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flammability and explosiveness of hydrocarbons hinder their wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: take 60 mol %HC600, 35 mol %FC13I1,5 mol % HFE143, used as a refrigerant after physical mixing at room temperature.

Embodiment 2

[0012] Embodiment 2: take 80 mol %HC600, 10 mol %FC13I1,10 mol % HFC245ca, used as a refrigerant after physical mixing at room temperature.

Embodiment 3

[0013] Embodiment 3: get 85 mol %HC600, 10 mol %FC13I1,5 mol % HFC245fa, used as a refrigerant after physical mixing at room temperature.

[0014] If the design working condition of the heat pump system is taken as follows: the evaporation temperature is 40°C, the condensation temperature is about 80°C, the superheating temperature is determined according to the specific working fluid composition, and the compressor inlet working medium is guaranteed to be in a saturated gas state, and the supercooling temperature is 75°C , the compressor efficiency is 85%. According to the cycle calculation, the relevant parameters of the above three embodiments and the comparison with CFC114 are listed in the following table 1:

[0015] CFC114

Example 1

Example 2

Example 3

ODP

0.85

0

0

0

GWP

9200

-

-

-

Evaporation pressure MPa

0.333

0.453

0.373

0.401

Condensing pressur...

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PUM

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Abstract

The present invention relates to a kind of green medium-high temp. heat pump working medium. It uses natural working medium hydrocarbon (HCs) as main composition, HC 600 and FC1311, HFE 143, HFC 245 ca and HFC245 fa are formed into different constituent elements and components. According to the different mole ratio the above-mentioned constituent elements and components can be formed into the freen heat pump working medium. The four working media of FC1311, HFE143, HFC245ca and HFC 245 fa can be used as refrigerating agent in refrigeration system, and also can be used as fire-resisting agent.The invented beneficial effect lies in that the introduction of fire-resisting working medium and change of mixture composition can eliminate flammability of working medium, raise its safety, it can be used in medium, high temp. heat pump system instead of CFC114.

Description

technical field [0001] The present invention pertains to refrigerants in heat pumps or refrigeration systems. Background technique [0002] It is well known that CFCs and HCFCs destroy the ozone layer of the atmosphere, thereby greatly increasing the amount of ultraviolet rays directly irradiating the earth, causing damage to human health and ecosystems. Therefore, the United Nations has successively formulated a series of regulations such as the Montreal Protocol on Substances that Deplete the Ozone Layer, the Copenhagen Amendment Protocol, and the Kyoto Protocol, setting a clear control schedule for the banning and banning of CFCs and HCFCs. However, so far, the research on the replacement of CFC114, the traditional working medium of medium and high temperature heat pumps, has not been carried out comprehensively and rapidly. This not only hinders the comprehensive substitution of CFCs and HCFCs, but also inevitably creates a bottleneck for the...

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
Owner TIANJIN UNIV