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Working medium for heat cycles and heat cycle system

A technology of working medium and circulation system, which is applied in irreversible cycle compression machines, chemical industry, heat exchange materials, etc. It can solve the problems of HFO-1123's flammability, safety issues, and insufficient cycle performance of thermal cycle systems. , to achieve excellent cycle performance, high productivity, and little impact

Inactive Publication Date: 2018-01-19
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, neither of the thermal cycle systems described in Patent Documents 1 and 2 has sufficient cycle performance (capacity)
[0010] In addition, the thermal cycle system described in Patent Document 3 has excellent cycle performance due to the HFO-1123 contained in the working medium used, but HFO-1123 is flammable, so there is a problem in terms of system safety

Method used

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  • Working medium for heat cycles and heat cycle system
  • Working medium for heat cycles and heat cycle system
  • Working medium for heat cycles and heat cycle system

Examples

Experimental program
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Embodiment

[0208] Hereinafter, the present invention will be described in detail through examples, but the present invention is not limited to the following description. Examples 1-3 are examples. In addition, the even numbers of Examples 4 to 65 are examples, and the odd numbers are comparative examples.

example 1～3

[0210] Four components, HFO-1123, HFC-134a, HFC-125, and HFO-1234yf, and HFO-1132a were mixed so that the ratio of each compound was as shown in Table 2, and a working medium of a 5-component system containing the above compounds was prepared. Then, these working media were mixed with air at a ratio of 10 to 90% by mass with respect to air, and the flammability at the time of mixing with air to reach an equilibrium state was evaluated in the following manner at intervals of 1% by mass.

[0211] [Flammability evaluation]

[0212] The flammability evaluation was carried out using the equipment specified in ASTM E-681.

[0213] After vacuum-exhausting the flask with an inner volume of 12 liters set in a thermostat controlled at a temperature of 25°C, the working medium adjusted to each concentration and air were sealed in the flask until it reached atmospheric pressure. Then, after performing discharge ignition for 0.4 seconds on the conditions of 15 kV and 30 mA in the gas phas...

example 4～65

[0219] The following working media were prepared: containing HFO-1123, HFC-134a, HFC-125 and HFO-1234yf in the ratios shown in Table 3 and Table 4, and at the ratios shown in the same table relative to the total amount of the working media The ratio contains HFO-1132a. Then, the refrigeration cycle performance (hereinafter referred to as refrigeration capacity Q) was measured for these working media by the following method.

[0220] In addition, the refrigerating capacity Q refers to the capacity of refrigerating a loaded fluid, and the higher the Q, the more work can be realized in the same system. In other words, when the Q value is large, it means that the target performance can be obtained with a small amount of working medium, and the miniaturization of the system can be realized.

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Abstract

Provided are: a working medium which is incombustible and has a low impact on the ozone layer and global warming even if leaked, while having excellent cycle performance and high productivity; and a heat cycle system having excellent safety. The ratio of the total amount of four components (trifluoroethylene, 1, 1, 1, 2-tetrafluoroethane, pentafluoroethane and 2, 3, 3, 3-tetrafluoropropene) to theworking medium is more than 90% by mass but less than 100% by mass; and the ratio of 1, 1-difluoroethylene to the working medium is less than 1.5% by mass. Relative to the total amount of the four components, the ratio of trifluoroethylene is from 3% by mass to 35% by mass (inclusive), the ratio of 1, 1, 1, 2-tetrafluoroethane is from 10% by mass to 53% by mass (inclusive), the ratio of pentafluoroethane is from 4% by mass to 50% by mass (inclusive), and the ratio of 2, 3, 3, 3-tetrafluoropropene is from 5% by mass to 51% by mass (inclusive).

Description

technical field [0001] The invention relates to a working medium for heat cycle and a heat 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. In addition, unless otherwise specified, saturated hydrofluorocarbons are referred to as HFCs in this specification, and are used to distinguish them from hydrofluoroolefins having a carbon-carbon double bond (hereinafter referred to as HFO). [0003] However, HFCs have been pointed out as a possible cause of global warming. For example, the greenhouse potential (GWP) of 1,1,1,2-tetrafluoroethane (HFC-134a) used as a refrigerant for automobile air conditioners is as high as 1430 (100-year value). [0004] A thermal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04F25B1/00
CPCC09K5/04F25B1/00Y02P20/10
Inventor 田坂真维福岛正人河口聪史谷口智昭竹内优
Owner ASAHI GLASS CO LTD
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