The compression/absorption heat pump cycle—conceptual design improvements and comparisons with the compression cycle
作者： Magnus Hultén , Thore Berntsson
DOI: 10.1016/S0140-7007(02)00014-2
关键词:
摘要: Performance improvement of an industrial single-stage compression/absorption heat pump (CAHP) using ammonia/water mixture as the working fluid has been studied theoretically. By allowing a higher absorber pressure (40 bar) than highest design today's screw compressors (25 bar), COPs could be obtained. Longer falling-film tubes in vertical shell-and-tube and desorber also increased COP. These two modifications together COP CAHP by 10%. The improved lower optimal glide (temperature difference due to composition change absorber) reduced solution exchanger sizes. study was performed with constant total area. Furthermore, performance for five heating cases. Its compared that two-stage compression (CHP) isobutane fluid, on basis approximately equal investment cost. It concluded only cases where both sink source temperature changes are high (>20 K) give superior CAHP.
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sci-hub.se 参考文章(12)
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