US2021253974A1PendingUtilityA1
Use of tetrafluoropropene based compositions
Est. expiryOct 10, 2036(~10.2 yrs left)· nominal 20-yr term from priority
Inventors:Wissam Rached
F25B 9/002C09K 2205/22C10N 2040/30C09K 2205/126C10N 2070/00C10N 2020/101C10M 171/008C09K 5/045C10M 2207/2835C09K 2205/128
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Claims
Abstract
The use of a composition including a polyol ester-based lubricant and a refrigerant F including at least one tetrafluoropropene and at least one hydrofluorocarbon, in a heat transfer system containing a vapour compression circuit including an oil separator. A heat transfer system including a vapour compression circuit containing a composition including a polyol ester lubricant, and a refrigerant F including at least one tetrafluoropropene and at least one hydrofluorocarbon, as a heat transfer composition, said vapour compression circuit including an oil separator.
Claims
exact text as granted — not AI-modified1 . A heat transfer system comprising a vapour compression circuit containing a composition comprising a polyol ester lubricant, and a refrigerant F comprising at least one tetrafluoropropene and at least one hydrofluorocarbon, as a heat transfer composition, said vapour compression circuit comprising an oil separator.
2 . The system according to claim 1 , wherein the polyol esters have the following formula (I):
R 1 [OC(O)R 2 ] n (I)
wherein:
R 1 is a linear or branched hydrocarbon radical, optionally substituted with at least one hydroxyl group and/or comprising at least one heteroatom selected from the group consisting of —O—, —N—, and —S—;
each R 2 is, independently of each other, selected from the group consisting of:
i) H;
ii) an aliphatic hydrocarbon radical;
iii) a branched hydrocarbon radical;
iv) a mixture of a radical ii) and/or iii), with an aliphatic hydrocarbon radical comprising from 8 to 14 carbon atoms; and
n is an integer of at least 2.
3 . The system according to claim 1 , wherein the polyol esters are obtained from a polyol selected from the group consisting of neopentyl glycol, glycerol, trimethylolpropane, pentaerythritol, dipentaerythritol, tripentaerythritol, and mixtures thereof.
4 . The system according to claim 1 , wherein the polyol esters are obtained from at least one branched carboxylic acid comprising from 5 to 8 carbon atoms.
5 . The system according to claim 1 , wherein the polyol esters are poly (neopentylpolyol) esters obtained by:
i) reaction of a neopentylpolyol with the following formula (V):
wherein:
each R represents, independently of each other, CH 3 , C 2 H 5 or CH 2 OH;
p is an integer between 1 and 4;
with at least one monocarboxylic acid containing 2 to 15 carbon atoms, in the presence of an acid catalyst, the molar ratio between the carboxyl groups and the hydroxyl groups being less than 1:1, to form a composition of poly (neopentyl partially esterified poly; and
ii) reacting the partially esterified poly (neopentyl) polyol composition obtained at the end of step i) with another carboxylic acid consisting from 2 to 15 carbon atoms, to form the poly (neopentyl polyol) ester composition.
6 . The system according to claim 1 , wherein the polyol esters have one of the following formulas (VIII) or (IX):
in which:
R 7 , R 8 , R 9 , R 10 , R 11 and R 12 are, independently of each other, H or CH 3 ;
a, b, c, y, x and z are, independently of each other, an integer;
a+x, b+y, and c+z are, independently of each other, integers ranging from 1 to 20;
R 13 , R 14 and R 15 are, independently of each other, selected from the group consisting of aliphatic or branched alkyls, alkenyls, cycloalkyls, aryls, alkylaryls, arylalkyls, alkylcycloalkyls, cycloalkylalkyls, arylcycloalkyls, cycloalkylaryls, alkylcycloalkylaryls, alkylarylcycloalkyls, arylcycloalkylalkyls, arylalkylcycloalkyls, cycloalkylalkylaryls and cycloalkylarylalkyls,
R 13 , R 14 and R 15 , consisting 1 to 17 carbon atoms, and may be optionally substituted.
or
wherein:
each of R 17 and R 18 , is, independently of each other, H or CH 3 ;
each of m and n is, independently of each other, an integer, with m+n being an integer from 1 to 10;
R 16 and R 19 are, independently of each other, selected from the group consisting of aliphatic or branched aliphatic or branched alkyls, alkenyls, cycloalkyls, aryls, alkylaryls, arylalkyls, alkylcycloalkyls, cycloalkylalkyls, arylcycloalkyls, cycloalkylaryls, alkylcycloalkylaryls, alkylarylcycloalkyls, arylcycloalkylalkyls, arylalkylcycloalkyls, cycloalkylalkylaryls and cycloalkylarylalkyls,
R 16 and R 19 , consisting 1 to 17 carbon atoms, and may be optionally substituted.
7 . The system according to claim 1 , wherein the refrigerant F comprises at least one tetrafluoropropene chosen from HFO-1234yf and HFO-1234ze, and at least one hydrofluorocarbon selected from the group consisting of dichloromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1-difluoroethane (HFC-152a), fluoroethane (HFC-161), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), 1,1,1-trifluoropropane (HFC-263fb), and mixtures thereof.
8 . The system according to claim 1 , wherein refrigerant F comprises one of the following mixtures:
HFO-1234yf
HFC-32
HFO-1234yf
HFC-152a
HFO-1234yf
HFC-134a
HFO-1234yf
HFC-125
HFO-1234ze
HFC-32
HFO-1234ze
HFC-152a
HFO-1234ze
HFC-134a
HFO-1234ze
HFC-125
HFO-1234yf
HFC-32
HFC-125
HFO-1234yf
HFC-152a
HFC-125
HFO-1234yf
HFC-152a
HFC-32
HFO-1234yf
HFC-134a
HFC-152a
HFO-1234yf
HFC-134a
HFC-32
HFO-1234yf
HFC-134a
HFC-125
HFO-1234ze
HFC-134a
HFC-152a
HFO-1234ze
HFC-134a
HFC-32
HFO-1234ze
HFC-134a
HFC-125
HFO-1234ze
HFC-152a
HFC-32
HFO-1234ze
HFC-152a
HFC-125
HFO-1234ze
HFC-32
HFC-125
HFO-1234yf
HFO-1234ze
HFC-134a
HFO-1234yf
HFO-1234ze
HFC-152a
HFO-1234yf
HFO-1234ze
HFC-134
HFO-1234yf
HFO-1234ze
HFC-32
HFO-1234yf
HFO-1234ze
HFC-125
HFO-1234yf
HFC-134a
HFC-152a
HFC-32
HFO-1234yf
HFC-134a
HFC-152a
HFC-125
HFO-1234yf
HFO-1234ze
HFC-134a
HFC-32
HFO-1234yf
HFO-1234ze
HFC-134a
HFC-152a
HFO-1234yf
HFO-1234ze
HFC-134a
HFC-125
HFO-1234ze
HFC-134a
HFC-152a
HFC-32
HFO-1234ze
HFC-134a
HFC-152a
HFC-125
HFO-1234yf
HFC-134a
HFC-152a
HFC-125
HFC-32
HFO-1234ze
HFC-134a
HFC-152a
HFC-125
HFC-32
9 . The system according to claim 1 , wherein refrigerant F comprises from 75.5 to 79.5% weight of HFO-1234yf, from 12 to 16% weight of HFC-152a, and from 6.5 to 10.5% weight of HFC-134a.
10 . The system according to claim 1 , wherein refrigerant F comprises 77.5% (±0.2%) weight of HFO-1234yf, 14% (±0.2%) weight of HFC-152a and 8.5% (±0.2%) weight of HFC-134a, said composition being azeotropic at a boiling point of between −40.00° C. and 70.00° C., at a temperature of pressure between 0.5 and 21.0 bar abs (±0.5%).
11 . The system according to claim 1 , selected from mobile or stationary heat pump heating, air conditioning, refrigeration, and freezing systems, and thermal engines.
12 . The system according to claim 1 , wherein said vapour compression circuit further comprises a centrifugal compressor.
13 . A method of producing electricity by means of a heat engine, said method comprising successively evaporation of the heat transfer composition, expansion of the heat transfer composition in a turbine for generating electricity, condensation of the heat transfer composition, and compression of the heat transfer composition,
wherein the process comprising using an oil separator, and said heat transfer composition being a composition comprising a lubricant based on polyol esters, and a refrigerant fluid F comprising at least one tetrafluoropropene and at least one hydrofluorocarbon.
14 . A method of heating or cooling a fluid or a body by means of a vapour compression circuit containing a heat transfer composition, said method comprising successively evaporation of the heat transfer composition, compression of the heat transfer composition, the condensation of the heat transfer composition and the expansion of the heat transfer composition,
said compression circuit comprising an oil separator, and
said heat transfer composition being a composition comprising a lubricant based on polyol esters, and a refrigerant fluid F comprising at least one tetrafluoropropene and at least one hydrofluorocarbon.Join the waitlist — get patent alerts
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