Publicado 8 números por año
ISSN Imprimir: 1065-5131
ISSN En Línea: 1563-5074
Indexed in
COMPARATIVE EXPERIMENTAL STUDY ON MICROCHANNEL AND FINNED-TUBE EVAPORATORS IN A WINDOW AIR-CONDITIONING SYSTEM
SINOPSIS
In view of the increasing energy consumption, it has become more and more important to compare different solutions in various everyday applications of broad use. Here, we compare the performance of a microchannel evaporator (MCE) and a finned-tube evaporator (FTE) in a window air-conditioning refrigeration system. To allow for a fair comparison between the two cases, the evaporators are identical in terms of shape, volume, surface area, air-side heat transfer area, fin thickness, and fan speed. By exploring a range of different refrigerant charges and thermal loads and measuring properties, such as the inlet and outlet temperature difference, the pressure drops, the cooling capacity, the coefficient of performance (COP), and the thermal hydraulic index of the two evaporators, we find that MCE overall exhibits a better performance. In particular, the cooling capacity of MCE is 38.8% and 14.5% higher than that of FTE under different charges and thermal loads, respectively, while the COP of MCE is 40.8% and 23.7% higher than that of FTE under the two different conditions. What's more, the average thermal hydraulic index ε, of the MCE system is 1.9 times and 2.2 times higher than that of the FTE system for these two different cases in terms of combined pressure drop and thermal performance, respectively. We anticipate that our experimental results may provide the data support in favor of the application of the MCE in the window air conditioner industry.
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