US 7,441,589 B2Granted

Absorption heat-transfer system

AssigneeCooling Technologies, Inc.

InventorsMichael A. Garrabrant, Roger E. Stout, Michael W. Klintworth, II, Eric Collet

Life of this patent

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Abstract

A waste heat source (100) is used to heat a high temperature heat transfer fluid which is used to heat an absorption heat transfer machine (10) having a generator (20), an absorber (30), a condenser (40), and an evaporator (50) operatively connected together. The high temperature heat transfer fluid can also be used to heat a load (190) such as a room space or a process. The waste heat source (100) can also be used to heat an intermediate heat transfer fluid, which can be used to heat a second load (175) such as a space, a process, or an absorption heat transfer machine. Novel flow control devices (70, 60) for controlling the flow of weak solution from generator (20) to absorber (30) or of refrigerant from condenser (40) to evaporator (50), respectively, are also described.

An absorption, heat-transfer system comprising:

a) a first absorption heat-transfer system comprising a first generator, an absorber, a condenser, and an evaporator operatively connected together;
b) a first flow control device located between said generator and said absorber and controlling the flow of a weak solution from said generator to said absorber;
c) a second flow control device located between said condenser and said evaporator and controlling the flow of a refrigerant from said condenser to said evaporator;
d) a waste-heat source;
e) a waste heat steam;
f) a high-temperature heat exchanger;
g) a solution pair in said first generator;
h) a first heat exchange unit in said first generator;
i) a first heating load;
j) an operationally connected high-temperature heat-exchange loop comprising:
1) a first pump;
2) a second heat exchange unit in said high-temperature heat exchanger;
3) a high-temperature heat-transfer fluid;
4) said first heat exchange unit in said first generator;
and
5) a third heat-exchange unit operationally connected to said high-temperature heat-exchange loop;
k) said waste heat source passing said waste heat stream to said high-temperature heat exchanger for heating said solution pair in said first generator to a temperature of at least about 250° F. (121°C.) via said first heat exchange unit in said generator, said first heat exchange unit operationally connected to said high-temperature heat-exchange loop with said second heat exchange unit in said high-temperature heat-exchange loop and in said high-temperature heat exchanger heating said high-temperature heat-transfer fluid with said waste heat stream from said waste-heat source;
l) an intermediate-temperature heat exchanger;
m) a second load;
n) an operationally connected intermediate-temperature heat-exchange loop comprising:
(1) a second pump;
(2) a fourth heat exchange unit in said intermediate temperature heat exchanger;
(3)a fifth heat-exchange unit for heating said second load via said waste heat stream emerging from said high-temperature exchanger;
and
(4) an intermediate heat-transfer fluid;
o) said waste heat source passing said waste heat stream to said high-temperature heat exchanger for heating at least one of the following:
(1) said first heating load via said third heat-exchange unit operationally connected to said high-temperature heat-exchange loop;
and
(2) said intermediate-temperature heat-exchange loop comprising said said fifth heat-exchange unit for heating said second load via said waste heat stream emerging from said high-temperature heat exchanger.

26 more elements

Facts

Application

10/497,222Filed 29 Nov 2002 · us provisional application

Priority

30 Nov 2001

Published

US 2005/0022963 A13 Feb 2005

Granted

28 Oct 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

F25B 15/04
Without inert gas: the refrigerant being ammonia evaporated from aqueous solution
F25B 27/02
Machines, plants or systems, using particular sources of energy: using waste heat, e.g. from internal-combustion engines
F25B 41/28
Disposition of valves, e.g. of on-off valves or flow control valves: specially adapted for sorption cycles
F25B 41/31
Expansion means; Dispositions thereof: expansion valves

Abstract

Claims27