Heat rejection and primary energy efficiency of solar driven absorption cooling systems

Review and recent improvements of solar sorption cooling systems

“…Palacin et al used open geothermal cycle as a heat rejection tank to remove this negative effect on chiller COP [48]. Eicker et al made comparison study between geothermal, wet, and dry geothermal heat rejection tank and found that the electrical COP is between 4 and 8 when using dry heat rejection [49].…”

The experimental characterization of a lithium bromide–water absorption chiller and the development of a calibrated model

“…However, in many cases the methods used to measure performance have not been adequately described and instrumentation and measurement uncertainties have not been provided (e.g. Prasartkaew, 2014;Borg and Kelly, 2012;Eicker et al, 2012;Yin et al, 2012;Monné et al, 2011;Helm et al, 2009;Nomenclature T g;i temperature of water at inlet of generator's heat exchanger (°C) T g;o temperature of water at outlet of generator's heat exchanger (°C) DT g T g;i À T g;o (°C) T e;i temperature of water at inlet of evaporator's heat exchanger (°C) T e;o temperature of water at outlet of evaporator's heat exchanger (°C) DT e T e;i À T e;o (°C) T c;i temperature of water at inlet of cooling heat exchanger (°C) V TP voltage signal generated by thermopile (mV) _ V g flow rate of water through generator circuit (L/s) _ V e flow rate of water through evaporator circuit (L/s) q density of water (kg/L) c P heat capacity of water (kJ/kgK) q evap rate of heat transfer at evaporator (kW) q gen rate of heat transfer at generator (kW) COP th thermal coefficient of performance (-) B…”

Energy efficiency and economic feasibility of an absorption air-conditioning system using wet, dry and hybrid heat rejection methods

“…The performance of the absorption chiller depends on the heat rejection of the absorber as well as the condenser. Hence, it is crucial to consider efficient heat rejection methods and energy consumption of auxiliaries for the overall primary energy balance of this cooling system [5].…”