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

Patent metadata

Field	Value
Publication number	US-2019257553-A1
Application number	US-201916292371-A
Country	US
Kind code	A1
Filing date	Mar 5, 2019
Priority date	Sep 7, 2016
Publication date	Aug 22, 2019
Grant date	—

Abstract

An object of the present invention is to provide, as a working fluid to be used for a heat cycle system, a working fluid for heat cycle that has cycle performance replaceable with that of R410A, and at the same time, has a small burden on an apparatus, low flammability, suppressed self-decomposition, and less effect on global warming, and therefore, is usable stably even if leaked, a composition for heat cycle system containing the same, and a heat cycle system using the composition. The working fluid for heat cycle contains trifluoroethylene, difluoromethane, and at least one selected from 1,1-difluoroethane, fluoroethane, propane, propylene, carbon dioxide, 2,3,3,3-tetrafluoropropene, and (E)-1,3,3,3-tetrafluoropropene at mass ratios satisfying predetermined expressions and at a ratio of the total content to be 90 to 100 mass % relative to the total amount of the working fluid and has a temperature glide of 10° C. or less.

First claim

1 : A working fluid for heat cycle comprising trifluoroethylene and difluoromethane, the working fluid for heat cycle further comprising:
at least one compound selected from the group consisting of 1,1-difluoroethane, fluoroethane, propane, propylene, carbon dioxide, 2,3,3,3-tetrafluoropropene, and (E)-1,3,3,3-tetrafluoropropene, wherein the total content ratio of trifluoroethylene, difluoromethane, 1,1-difluoroethane, fluoroethane, propane, propylene, carbon dioxide, 2,3,3,3-tetrafluoropropene, and (E)-1,3,3,3-tetrafluoropropene relative to the total amount of the working fluid for heat cycle is 90 to 100 mass %, content ratios by mass of the respective compounds satisfy all Expressions A, B, C, D and E or all Expressions A2, B, C, D and E below when the total content of trifluoroethylene, difluoromethane, 1,1-difluoroethane, fluoroethane, propane, propylene, carbon dioxide, 2,3,3,3-tetrafluoropropene, and (E)-1,3,3,3-tetrafluoropropene contained in the working fluid for heat cycle is set to 1, and a temperature glide is 10° C. or less when operating a standard refrigeration cycle system under a temperature condition (T) that in the case of the working fluid for heat cycle being a zeotropic mixture, an average temperature of an evaporation start temperature and an evaporation completion temperature is 0° C., in the case of the working fluid for heat cycle being an azeotropic mixture, an evaporation temperature is 0° C., in the case of the working fluid for heat cycle being a zeotropic mixture, an average temperature of a condensation start temperature and a condensation completion temperature is 40° C., in the case of the working fluid for heat cycle being an azeotropic mixture, a condensation temperature is 40° C., a degree of supercooling (SC) is 5° C., and a degree of superheating (SH) is 5° C.,
0<−1.000×[ HFO -1123]+1.179×[ R 32]+1.316×[ 1234 yf ]+1.316×[1234 ze ( E )]+3.831×[CO2]+2.632×[ R 152 a ]+2.390×[ R 161]±6.262×[propane]+2.237×[propylene],  Expression A;

0<−1.000×[ HFO -1123]+1.033×[ R 32]+0.896×[ 1234 yf ]+0.896×[1234 ze ( E )]+2.891×[CO2]+1.955×[ R 152 a ]+1.410×[ R 161]+3.737×[propane]+1.520×[propylene],  Expression A2;

10>3.426×[ HFO -1123]+5.673×[ R 32]+2.193×[ 1234 yf ]−0.596×[1234 ze ( E )]−0.768×[CO2]+29.897×[ R 152 a ]+64.400×[ R 161]+118.965×[propane]+94.943×[propylene],  Expression B;

1.78>1.293×[ HFO -1123]+1.029×[ R 32]+0.369×[ 1234 yf ]+0.354×[1234 ze ( E )]+3.807×[CO2]+0.229×[ R 152 a ]+0.406×[ R 161]+0.568×[propane]+0.719×[propylene],  Expression C;

0.91<1.214×[ HFO -1123]+1.133×[ R 32]+0.402×[ 1234 yf ]+0.346×[1234 ze ( E )]+3.359×[CO2]+0.323×[ R 152 a ]+0.548×[ R 161]+0.588×[propane]+0.725×[propylene], and  Expression D;

160>0.3×[ HFO -1123]+675×[ R 32]+4×[ 1234 yf ]+6×[1234 ze ( E )]+1×[CO2]+124×[ R 152 a ]+12×[ R 161]+3.3×[propane]+1.8×[propylene],  Expression E;

where in Expression A to Expression E, [HFO-1123] represents the content ratio by mass of trifluoroethylene, [R32] represents the content ratio by mass of difluoromethane, [R152a] represents the content ratio by mass of 1,1-difluoroethane, [R161] represents the content ratio by mass of fluoroethane, [propane] represents the content ratio by mass of propane, [propylene] represents the content ratio by mass of propylene, [CO2] represents the content ratio by mass of carbon dioxide, [1234yf] represents the content ratio by mass of 2,3,3,3-tetrafluoropropene, and [1234ze(E)] represents the content ratio by mass of (E)-1,3,3,3-tetrafluoropropene respectively when the total content of trifluoroethylene, difluoromrethane, 1,1-difluoroethane, fluoroethane, propane, propylene, carbon dioxide, 2,3,3,3-tetrafluoropropene, and (E)-1,3,3,3-tetrafluoropropene is set to 1.

2 : The working fluid for heat cycle according to claim 1 satisfying Expression B2 below in place of Expression B above,
8>3.426×[ HFO -1123]+5.673×[ R 32]+2.193×[ 1234 yf ]−0.596×[1234 ze ( E )]−0.768×[CO2]+29.897×[ R 152 a ]+64.400×[ R 161]+118.965×[propane]+94.943×[propylene].  Expression B2;

3 : The working fluid for heat cycle according to claim 1 satisfying Expression B3 below in place of Expression B above,
6>3.426×[ HFO -1123]+5.673×[ R 32]+2.193×[ 1234 yf ]−0.596×[1234 ze ( E )]−0.768×[CO2]+29.897×[ R 152 a ]+64.400×[ R 161]+118.965×[propane]+94.943×[propylene].  Expression B3;

4 : The working fluid for heat cycle according to claim 1 satisfying Expression C3 below in place of Expression C above,
1.65>1.293×[ HFO -1123]+1.029×[ R 32]+0.369×[ 1234 yf ]+0.354×[1234 ze ( E )]+3.807×[CO2]+0.229×[ R 152 a ]+0.406×[ R 161]+0.568×[propane] T 0.719×[propylene].  Expression C3;

5 : The working fluid for heat cycle according to claim 1 satisfying Expression D3 below in place of Expression D above,
1<1.214×[ HFO -1123]+1.133×[ R 32]+0.402×[ 1234 yf ]+0.346×[1234 ze ( E )]+3.359×[CO2]+0.323×[ R 152 a ]+0.548×[ R 161]+0.588×[propane]+0.725×[propylene].  Expression D3;

6 : The working fluid for heat cycle according to claim 1 satisfying Expression E3 below in place of Expression E above,
120>0.3×[ HFO -1123]+675×[ R 32]+4×[ 1234 yf ]+6×[1234 ze ( E )]+1×[CO2]+124×[ R 152 a ]+12×[ R 161]+3.3×[propane]+1.8×[propylene].  Expression E3;

7 : The working fluid for heat cycle according to claim 1 , wherein the temperature glide is 6° C. or less.

8 : The working fluid for heat cycle according to claim 1 , wherein a relative coefficient of performance (RCOP R410A ) calculated by Expression (Y) below is greater than 0.9,

Relative
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coefficient
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of
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performance
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(

RCOP

R
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410
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A

)

=

Coefficient
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of
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performance
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of
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sample
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Assignees

• Agc Inc

Inventors

• ONO Hikaru
• Ueno Katsuya
• Otsuka Tetsuo

Classifications

• F25B9/002 Primary

  characterised by the refrigerant · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title

• C09K2205/122

  Halogenated hydrocarbons · CPC title