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Title: | COMPRESSOR-LESS WATER-BASED GREEN AIR-CONDITIONING SYSTEM | Authors: | CUI XIN | Keywords: | Heat exchanger, air-conditioning, indirect evaporative cooling, mathematical model, heat and mass transfer, dehumidification | Issue Date: | 30-Jun-2015 | Citation: | CUI XIN (2015-06-30). COMPRESSOR-LESS WATER-BASED GREEN AIR-CONDITIONING SYSTEM. ScholarBank@NUS Repository. | Abstract: | IN THIS DISSERTATION, AN ENERGY-SAVING AND ENVIRONMENTALLY-FRIENDLY AIR-CONDITIONING METHOD HAS BEEN INVESTIGATED. THE KEY COMPONENT IS A REGENERATIVE INDIRECT EVAPORATIVE HEAT EXCHANGER (IEHX). FIRST, AN EXPERIMENTAL STUDY WAS CONDUCTED AND EMPLOYED AS A BASIS FOR FURTHER MODEL VALIDATION AND SYSTEM OPTIMIZATION. NEXT, MATHEMATICAL MODELS HAVE BEEN DEVELOPED FOR EXPLORING THE FUNDAMENTAL CONCEPTS OF THE HEAT AND MASS TRANSFER PHENOMENA. AN ANALYTICAL MODEL FOR IEHXS HAS BEEN ESTABLISHED VIA A MODIFIED LOG MEAN TEMPERATURE DIFFERENCE (LMTD) METHOD TO ACCOUNT FOR THE LATENT HEAT TRANSFER DUE TO WATER EVAPORATION. IN ADDITION, A NUMERICAL MODEL HAS BEEN DEVELOPED TO ENABLE THE STUDY OF A NEW M-CYCLE DESIGN. FURTHERMORE, A HYBRID SYSTEM, THAT EMPLOYS AN IEHX AS A PRE-COOLING UNIT, HAS BEEN INTRODUCED FOR HUMID TROPICAL CLIMATE APPLICATION. FINALLY, A COMPACT DESICCANT-EVAPORATIVE HEAT AND MASS EXCHANGER (HMX), WHICH COMBINED THE ADVANTAGES OF INDIRECT EVAPORATIVE COOLING AND LIQUID DESICC | URI: | http://scholarbank.nus.edu.sg/handle/10635/121129 |
Appears in Collections: | Ph.D Theses (Open) |
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