Experimental assessment of an absorption heat transformer prototype at different temperature levels into generator and into evaporator operating with water/Carrol mixture

Abstract Absorption Heat Transformer ( AHT ) is a device to recovery heat waste by a thermodynamic cycle. In this paper, an experimental AHT prototype operated with four temperature levels and two pressure levels was analyzed. This prototype was build with commercial Plate Heat Exchangers ( PHE ) and operates with water/Carrol mixture. The heat powers measured were 1.03, 1.48 and 1.51 kW for the generator, 1.19, 1.54 and 1.61 kW for the condenser, 1.21, 1.57 and 1.64 kW for the evaporator, and finally, 0.59, 0.98 and 1.09 kW for the absorber. Experimental Gross Temperature Lift ( GTL ) was 18.0, 17.4 and 16.5 °C and the dimensionless values of Coefficient of Performance ( COP ) calculated for those operating conditions were 0.26, 0.32 and 0.35. Absorber temperatures were 106.8, 105.3, 103.9 °C.