Using heat recovered from heat source to obtain high temperature hot water
First Claim
Patent Images
1. A refrigeration system, comprising:
- a first refrigeration cycle having a first refrigerant, the first refrigeration cycle including a condenser that cools the first refrigerant and rejects heat in a cooling mode, and the rejected heat in a heat transfer relationship with air; and
a second refrigeration cycle having a second refrigerant,the second refrigerant having a relatively lower pressure than the first refrigerant,the second refrigeration cycle is in a heat exchange relationship with the first refrigeration cycle operating in the cooling mode through a heat exchanger that uses heat from the first refrigerant to heat up and evaporate the second refrigerant, such that the first refrigeration cycle providing a source of heat to the second refrigeration cycle, the second refrigeration cycle configured to heat water using, as a boost, the source of heat from the first refrigeration cycle.
1 Assignment
0 Petitions
Accused Products
Abstract
Heat is recovered from a heat source to heat water to high temperatures. Apparatuses, systems and methods are described to heat water to a high temperature by using heat, such as may be considered in some instances as waste heat, recovered from a heat source. The methods, systems, and apparatuses described utilize low pressure refrigerant(s) as a fluid to provide a refrigeration cycle that utilizes a source of heat to heat water to a high temperature. The refrigeration cycle can be with or without a cascade cycle. The refrigerant cycle in some examples uses an oil free compressor.
13 Citations
19 Claims
-
1. A refrigeration system, comprising:
-
a first refrigeration cycle having a first refrigerant, the first refrigeration cycle including a condenser that cools the first refrigerant and rejects heat in a cooling mode, and the rejected heat in a heat transfer relationship with air; and a second refrigeration cycle having a second refrigerant, the second refrigerant having a relatively lower pressure than the first refrigerant, the second refrigeration cycle is in a heat exchange relationship with the first refrigeration cycle operating in the cooling mode through a heat exchanger that uses heat from the first refrigerant to heat up and evaporate the second refrigerant, such that the first refrigeration cycle providing a source of heat to the second refrigeration cycle, the second refrigeration cycle configured to heat water using, as a boost, the source of heat from the first refrigeration cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of heating water, comprising:
-
evaporating a first refrigerant in a cooling mode; compressing the evaporated first refrigerant in the cooling mode; rejecting heat from the compressed first refrigerant to condense the first refrigerant in the cooling mode which includes; rejecting a first portion of the heat from the compressed first refrigerant to a second refrigerant through a heat exchanger, and rejecting a second portion of the heat from the compressed first refrigerant through a condenser, the rejected second portion of heat in a heat transfer relationship with air; and heating water, via the second refrigerant, with the first portion of the rejected heat from the compressed first refrigerant, such that the heating water heats water in the range of 160°
F. to 200°
F.,the second refrigerant being a relatively low pressure refrigerant suitable to heat water to the range of 160°
F. to 200°
F., andthe second refrigerant is selected from at least one from the group consisting of trans-1-chloro-3,3,3 trifluoropropene;
cis-1-chloro-3,3,3 trifluoropropene;
2-chloro-3,3,3 trifluoropropene;
1,1,dichloro-3,3,3 trifluoropropene;
trans-1,2 dichloro-3,3,3 trifluoropropene;
cis-1,2 dichloro-3,3,3 trifluoropropene;
1,1,3,3 tetrafluoropropane;
1,1,1,2,3 pentafluoropropane;
1,1,2,3,3 pentafluoropropane;
1,1,1,3,3 pentafluoropropane;
1,1,1,2,2 pentafluoropropane;
1,1,1,2,2,3 hexafluoropropane;
1,1,1,2,3,3 hexafluoropropane;
1,1,1,3,3,3 hexafluoropropane;
propane;
butane;
isobutene;
isopentane;
pentane;
cyclopentane;
1, 1 difluoroethane;
1,2-difluoroethane;
difluoromethane;
1,1,1,2 tetrafluoroethane;
trans-1,3,3,3 tetrafluoropropene;
cis-1,3,3,3 tetrafluoropropene;
2,3,3,3 tetrafluoropropene;
1,1,2 trichloro-3,3,3 trifluoropropene;
trans-1,2 dichloroethylene;
cis-1,2 dichloroethylene;
1,1 dichloroethylene;
cis-1,1,1,4,4,4 hexafluorobutene;
trans-1,1,1,4,4,4 hexafluorobutene;
1,2-difluoroethene;
1,1,1,2 tetrafluoroethane;
1,1,2,2 tetrafluoroethane;
1,1 difluoroethene;
trans-1,2 difluoroethene;
cis-1,2 difluoroethene;
Z-1-chloro-2,3,3,3-tetrafluoropropene;
E-1-chloro-2,3,3,3-tetrafluoropropene;
E-1,1,1,4,4,5,5,5-octafluoropent-2-ene;
trifluoroiodomethane; and
1,2,2 trifluroroethene.
-
-
11. A method of heating water, comprising:
-
evaporating a first refrigerant in a first refrigeration cycle in a cooling mode; compressing the evaporated first refrigerant in the first refrigeration cycle in the cooling mode; rejecting heat from the compressed first refrigerant to condense the first refrigerant in the cooling mode, wherein the rejecting of heat from the compressed first refrigerant in the cooling mode includes; the first refrigerant in a heat exchange relationship with a second refrigerant in a second refrigeration cycle through a heat exchanger and vaporizing the second refrigerant in the second refrigeration cycle, and a condenser in the first refrigeration cycle cooling the first refrigerant and rejecting heat, the rejected heat from the condenser in a heat exchange relationship with air; compressing the vaporized second refrigerant in the second refrigeration cycle; and heating water with the compressed second refrigerant and condensing the compressed second refrigerant, the second refrigerant having a relatively lower pressure than the first refrigerant, where the first refrigerant from the first refrigeration cycle providing a source of heat to the second refrigerant, and where the second refrigeration cycle configured to heat the water using, as a boost, the source of heat from the first refrigeration cycle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification