Abstract
Bubble pump is the bottle neck of the DAR cycle and its performance depends on the amount of separated refrigerant. An experimental continuous system was designed to characterize the performance of three parallel bubble pumps with a solution of R134a-DMAC. The dependence of the number of bubble pump lift tubes and various operating conditions on the amount of the desorbed refrigerant was investigated.The results showed that in comparison to a single lift tube, the use of two or three parallel lift tubes at optimal heat input and mass concentration could double or triple, correspondingly, the amount of desorbed refrigerant.
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