Heat transfer study of four nested helical coils inside an absorption heat transformer

摘要

ABSTRACT This paper shows the design and experimental analysis of a dual generator/condenser component for an absorption heat transformer (AHT) of 2?kW operating with H2O/LiBr, and heat exchangers with four nested helical coils in series. This design shows a compaction ratio of 5.26?×?104 Wm?3/K in the generator and 1.58?×?104 Wm?3/ K in the condenser (higher than in the literature). This AHT can research a gross temperature lift of up to 24.9?K and coefficient of performance of 0.44. The desorption and condensation processes developed under the new arrangement reduce the sizing and installation area, and reduce heat losses, tube friction, and stability time.