Advanced regenerative absorption refrigeration cycles

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867358

Dao, Kim ^[1]

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1. 14 Nace Ave., Piedmont, CA 94611

Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: Dao, Kim (14 Nace Ave., Piedmont, CA 94611)
• Patent Number(s): US 4921515
• OSTI ID: 867358
• Country of Publication: United States
• Language: English

Related Subjects

advanced
regenerative
absorption
refrigeration
cycles
multi-effect
provide
coefficient
performance
cop
relatively
input
temperatures
absorber-coupled
double-effect
cycle
adr
10
provided
single-effect
11
topping
subcycle
1r
12
bottoming
boiler
13
condenser
21
expansion
device
28
evaporator
31
absorber
40
operatively
connected
multistage
48
multi-stage
resorber
51
multisection
regenerator
49
external
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applied
operation
500
degrees
pressure
vapor
generated
substantially
adiabatic
isothermal
functioning
ser
provides
700
111
140
coupled
improvement
stages
50b-f
portion
output
pumped
boiling
conduits
71a-f
stage
48a
refrigeration cycle
external heat
absorption cycle
absorption refrigeration
operatively connected
expansion device
regenerative absorption
effect absorption
/62/