放冷冷水の冷却水化による蓄熱式空調システムの昼間電力消費削減に関する研究: 第3報——空冷冷凍機システムへの適用

摘要

In previous papers, a method for applying cold water discharged as the cooling water of a refrigerator was proposed. Furthermore, on the basis of the partial load characteristics of present refrigerators, the parallel operation of the proposed system with the discharging operation of the heat storage tank was proposed. From the calculation of these systems, it was shown that the growth of the total electric energy consumption was limited to less than 5%, although the electric power consumption during the day was greatly reduced. In this paper, the proposed system was assumed to apply to an air cooled refrigerator system with a heat storage tank to reduce the growth of the total electric energy consumption. The calculated results showed that the total electric energy consumption was limited to less than 1%, and the electric power consumption during the day was reduced efficiently. Furthermore, after expanding this application system to a heat storage system with alarge temperature difference, the effects of the electric power consumption during the day and the total electric energy consumption were considered.%既報において昼間消費電力削減を目的に，蓄熱槽内の放冷冷水を冷却水として用いる放冷冷水の冷却水化方式を提案した.さらに続報で，水冷冷凍機の部分負荷特性を考慮した運転方法の改良を行い，冷凍機2台運転のシミュレーションを行った結果，冷凍機消費電力を大幅に低減できるが，冷凍機消費エネルギーは5%程度増加することを示した.本報では，冷却水化方式による冷凍機消費エネルギーの増加を抑えるために，空冷冷凍機を用いた蓄熱式空調システムに放冷冷水の冷却水化を適用し，既報同様シミュレーションによって冷凍機消費電力と冷凍機消費エネルギーへの影饗を調べた.その結果，冷凍機消費電力は既報と同程度に低減可能で，冷凍機消费ェネルギーが増加する場合でも1%以下に抑えられることを示した.さらに，大温度差送水システムに冷却水化方式を適用した場合の効果について考察を加えた。