The compression-absorption heat pump (C-A HP), one
of the promising heat recovery equipments that make process hot
water using low temperature heat of wastewater, was evaluated by
computer simulation. A simulation program was developed based on
the continuity and the first and second laws of thermodynamics. Both
the absorber and desorber were modeled using UA-LMTD method. In
order to prevent an unfeasible temperature profile and to reduce
calculation errors from the curved temperature profile of a mixture,
heat loads were divided into lots of segments. A single-stage
compressor was considered. A compressor cooling load was also
taken into account. An isentropic efficiency was computed from the
map data. Simulation conditions were given based on the system
consisting of ordinarily designed components. The simulation results
show that most of the total entropy generation occurs during the
compression and cooling process, thus suggesting the possibility that
system performance can be enhanced if a rectifier is introduced.
[1] Hultén M, Berntsson T. "The compression/absorption cycle - influence of
some major parameters on COP and a comparison with the compression
cycle," Int J Refrig 1999;22:91-106.
[2] Itard L."Wet compression versus dry compression in heat pumps working
with pure refrigerants or non-azeotropic mixtures," Int J Refrig
1995;18:495-504.
[3] Klein S. EES (Engineering Equation Solver) V7.345. web site:
http://www.fChart.com; 2005.
[1] Hultén M, Berntsson T. "The compression/absorption cycle - influence of
some major parameters on COP and a comparison with the compression
cycle," Int J Refrig 1999;22:91-106.
[2] Itard L."Wet compression versus dry compression in heat pumps working
with pure refrigerants or non-azeotropic mixtures," Int J Refrig
1995;18:495-504.
[3] Klein S. EES (Engineering Equation Solver) V7.345. web site:
http://www.fChart.com; 2005.
@article{"International Journal of Earth, Energy and Environmental Sciences:57775", author = "Young-Jin Baik and Minsung Kim and Young-Soo Lee and Ki-Chang Chang and Seong-Ryong Park", title = "Computational Evaluation of a C-A Heat Pump", abstract = "The compression-absorption heat pump (C-A HP), one
of the promising heat recovery equipments that make process hot
water using low temperature heat of wastewater, was evaluated by
computer simulation. A simulation program was developed based on
the continuity and the first and second laws of thermodynamics. Both
the absorber and desorber were modeled using UA-LMTD method. In
order to prevent an unfeasible temperature profile and to reduce
calculation errors from the curved temperature profile of a mixture,
heat loads were divided into lots of segments. A single-stage
compressor was considered. A compressor cooling load was also
taken into account. An isentropic efficiency was computed from the
map data. Simulation conditions were given based on the system
consisting of ordinarily designed components. The simulation results
show that most of the total entropy generation occurs during the
compression and cooling process, thus suggesting the possibility that
system performance can be enhanced if a rectifier is introduced.", keywords = "Waste heat recovery, Heat Pump.", volume = "6", number = "10", pages = "685-4", }