移動体通信基地局の冷却システムに関する研究 : 冷媒自然循環を用いる冷却装置の性能解析(熱工学,内燃機関,動力など)

概要

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New cooling system with a natural-circulation loop has been developed to reduce energy consumption of a cooling system for the telecommunication base site. The cooling system consists of two refrigeration units; vapor compression refrigeration unit and pre-cooling unit with a natural-circulation loop. A simulation which calculates pressure drop, heat transfer and refrigerant charge has been developed and the experiments were carried out to evaluate the cycle performance of the pre-cooling unit using HFC refrigerants. The measured cooling capacity and operating pressure agreed with the simulation results within ±10% in the various experimental conditions. In addition, the experimental results indicated that the cooling capacity of R 410 A is approximately 30% larger than that of R 407 C at the temperature difference of 20 K. Also the cooling capacity took a maximum value at the range of refrigerant charge of 2.0〜3.0kg. Furthermore, the cooling capacity slightly increased as the height difference between the evaporator and the condenser increased. These experimental results were in good agreement with the simulation results.
社団法人日本機械学会の論文
2005-07-25