Design and fabrication of an absorption refrigeration machine employing naturally circulating weak LiBr-H₂O solutions and its performance

Abstract

An experimental natural circulation type LiBr-H₂O absorption cooling machine was designed, fabricated, and tested for its performance to prove its feasibility in connection with solar heat energy source.
The working solar energy collecter-generator temperature was assumed to be approximately 70°C and the corresponding charge of LiBr-H₂O solution concentration was diluted to approximately 50% LiBr by weight.
The test results were summarized in Table 2 and the overall coefficient of heat transfer in each heat exchanger was given in Fig. 7. The test results suggested that in order to obtain longer and better thermosiphon effects so that the overall capacity of the machine would be improved, a combined collecter-generator should replace the bubble column generator which was employed in the test machine.