22 May 2008

EXPERIMENTAL INVESTIGATIONS AND EXERGY ANALYSIS OF A MODIFIED HYBRID HEAT PUMP SYSTEM USING NH3-H2O AS WORKING FLUID


The energy consumption for space air conditioning bears huge share of total
energy consumption around the world. Due to the increasing pressures of energy demand,
the degradation of environment, global warming and depletion of ozone layer etc., there is
need of efficient energy utilization and waste heat recovery. The researchers are
concentrating on the alternate and environment friendly refrigerants, especially after the
Kyoto and the Montreal Protocols. In this paper, the investigations on a modified hybrid
vapour compression/absorption heat pump system using ammonia-water as the working fluid
have been presented. This system can also utilize the non-conventional energy sources such
as solar energy and bio-gas in addition to the waste heat from different industries. The
theoretical as well as the experimental performance based on the energy and exergy
analysis have been investigated.