435 水冷パッケージ空調システムの冷却水熱容量を考慮した信頼性評価に基づく冷却塔設計の研究(環境数値シミュレーション,環境保全型エネルギー技術)  [in Japanese] 435 Design of Water-Cooled Packaged Air-Conditioning System Based on Reliability Assessment  [in Japanese]

Water-cooled packaged air conditioner systems are gaining renewed recognition from the perspective of preventing the urban heat island phenomenon. Up to now, however, there have been no reliable methods for optimizing equipment capacity For this reason, in telecommunications buildings, which demand high levels of reliability, there are cases of excessively redundant configurations, which not only result in reduced space efficiency, but also invite reduced operating efficiency due to partial load operations. In this report, we construct a model for evaluating water-cooled packaged air conditioner systems, and demonstrate that it is possible to study equipment configurations based on these reliability evaluations. Using this reliability evaluation model, we show the equipment configurations required for a level of reliability. Furthermore, we propose a design process using the reliability evaluation methods in this research, taking into account reduced capacity of the cooling tower resulting from the passage of time.