應用蓄熱能電池於儲冰式空調系統之研究

A Study on Thermal Battery Used in Ice-Storage Air Condition System

本文將蓄熱能電池（thermal battery, TB）加裝於氣冷式冰水機組中，利用蓄熱能電池之儲能特性，於冷房負荷輕載或無載時，將空調系統多餘的能量轉換為儲冰，並於高冷房負荷時融冰以提高冷房能力；故不論冷房負荷如何變化，本系統隨時以近於滿載之狀態運轉，因此運轉效率佳。另外，由於本系統之結構簡單，管路系統單純，在保養維護上亦相當容易。經實驗證明，加裝蓄熱能電池之儲冰式空調系統，與一般的氣冷式空調系統相較，其優點如下：（一）能夠提高40~60%的冷房能力，減少空調設備的設計容量。（二）配合足量之儲冰，在尖峰負載時約可轉移空調電力的三分之一。（三）對於運轉八小時的場所，至少可節省15.1%的電費。故若能以本系統取代傳統的儲冰式空調系統，不僅能夠轉移夏季的尖峰電力需求，對於業主亦可收到節省電費的效益。

This paper is aimed at incorporating a thermal battery (TB) into an aircooled chilling unit to store surplus thermal energy by generating ice underlight-loaded or unloaded conditions and to reclaim the energy by meltingthe stored ice to enhance cooling capability during the peak-load period. Itis shown in this paper that the proposed system can operate at almostfull-load condition despite load fluctuation, which means high efficiencyfor the proposed system. In addition, the pipeline structure of this system issimplified by reducing the number of heat exchangers and hence themaintenance.Experimental results are shown to indicate the advantages of theproposed system. These results show that the system is able to increasecooling capability by 40~60%, transfer approximately one third of the peakpower demand required by an air-conditioning system, and save at least 15.1% of the power fee for 8-hours of operation. Therefore, replacingtraditional air conditioning systems by the proposed system is a solution toeasing the peak load demand during the summer and acquiring economicbenefit.