Working medium for heat cycle, composition for heat cycle system, and heat cycle system

A technology of working medium and circulation system, which is applied to irreversible circulating compressors, refrigeration components, materials for heat exchange, etc. It can solve the problems of large temperature gradient, difficult recovery of working medium, and poor management of working medium, and achieve temperature gradient. Small, excellent cycle performance, small composition change effect

Inactive Publication Date: 2017-02-15
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, when the composition of the working medium changes, it is difficult to restore the working medium to the initial composition
Therefore, when a zeotropic composition is used as a working medium, there is a problem that the manageability of the working medium is poor
In addition, when a zeotropic composition is used as a working medium, there is also the problem that the temperature gradient becomes larger

Method used

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  • Working medium for heat cycle, composition for heat cycle system, and heat cycle system
  • Working medium for heat cycle, composition for heat cycle system, and heat cycle system
  • Working medium for heat cycle, composition for heat cycle system, and heat cycle system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0189] Hereinafter, examples of the present invention will be described, but the present invention is not limited to these examples.

[0190] (Evaluation of self-degradability of HFO-1132(E))

[0191] The evaluation of self-decomposability was carried out using a device based on Method A recommended as a device for measuring the combustion range of a gas mixed with a halogen-containing gas in a separate document of the High Pressure Gas Safety Act.

[0192] To be specific, the internal volume is 650cm when the temperature is controlled externally. 3 After sealing the thermal cycle working medium obtained by mixing HFO-1132(E) and HFC-32 or HFC-125 in various proportions in a spherical pressure-resistant container at a specified pressure, the platinum wire installed inside is fused An energy of about 30J was applied. The presence or absence of self-decomposition was confirmed by measuring the temperature and pressure changes in the pressure-resistant container after energy ap...

example 1

[0197] (Evaluation of refrigeration cycle performance)

[0198] The cycle performance evaluation of the thermal cycle working media 1-28 composed of this type of azeotropic composition shown in Tables 4-6 was carried out as follows. exist image 3 In the refrigerating cycle system 10 of the above-mentioned thermal cycle using the working medium 1~28 respectively, in image 3 The thermal cycle shown, i.e. adiabatic compression using compressor 11 in process AB, isobaric cooling using condenser 12 in process BC, isenthalpic expansion using expansion valve 13 in process CD, and evaporation in process DA The refrigeration cycle performance (refrigeration capacity and efficiency coefficient) was evaluated as the cycle performance (capacity and efficiency) when the device 14 performed isobaric heating.

[0199] The evaluation was carried out under the following conditions: the average evaporation temperature of the working medium for thermal cycle in the evaporator 14 is 0°C, the ...

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Abstract

Provided are: a working medium for a heat cycle, said working medium containing 1,2-difluoroethylene and exhibiting high stability, reduced environmental impact, and cycle performance that can replace that of R410A (a pseudo-azeotropic mixed refrigerant including difluoromethane and pentafluoroethane at a mass ratio of 1:1) and 1,1,1,2-tetrafluoroethane; a composition for heat cycle system, said composition using the medium; and a heat cycle system using the composition. The working medium for a heat cycle is characterized by the inclusion of 1,2-difluoroethylene and at least two types of hydrofluorocarbon selected from the group of hydrofluorocarbons that include a carbon-carbon double bond other than a saturated hydrofluorocarbon and 1,2-difluoroethylene.

Description

technical field [0001] The present invention relates to a working medium for thermal cycle, a composition for thermal cycle system and a thermal cycle system. Background technique [0002] As a heat cycle system used in refrigerators, air conditioners, power generation systems (waste heat recovery power generation, etc.), latent heat transport devices (heat pipes, etc.), it is known to use hydrofluorocarbons (hereinafter referred to as HFCs) that have a small impact on the ozone layer as operating systems. medium. For example, R410A (an azeotrope-like mixed refrigerant in which the mass ratio of difluoromethane (HFC-32) and pentafluoroethane (HFC-125) is 1:1) has been widely used. However, HFCs have been pointed out as a possible cause of global warming. Therefore, there is an urgent need to develop working media with little impact on the ozone layer and low greenhouse effect coefficient (GWP). In this specification, for halogenated hydrocarbons, the abbreviation of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/126C09K2205/22C09K2205/32C09K2205/122F25B1/00F25B43/00F25B2400/12F25B2500/16F25B2500/222
Inventor 福岛正人河口聪史
Owner AGC INC
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