太陽電池直驅式冷氣系統研究

Abstract

本研究設計了一個太陽電池直驅式冷氣系統，並探討太陽電池在近最大功率點操作(nearly Maximum Power Point Operation, nMPPO)下，冷氣系統的運轉情形與輻射量變化的關係。可分為兩個部分討論，(1)全天的累積輻射量對冷氣系統的運轉情形；(2)瞬間的輻射量變化對冷氣系統運轉的影響。本研究發現累積輻射量對冷氣系統的運轉率大致上呈現線性關係，其製冷量大致與累積輻射量呈現正相關。除此之外，冷氣系統的運轉率亦受到天氣型態的影響，包括(1)輻射量的分佈情形(2)輻射量的瞬間變化。 本研究亦探討系統的設計匹配對於冷氣運轉率有何影響。本研究發現當系統蓄電池容量上升，但太陽電池瓦數不變，此時冷氣系統的運轉率並未有明顯提高，因此冷氣系統的運轉率主要受到太陽電池瓦數的影響。 本研究最後探討直驅式冷氣系統的經濟效益。從實驗結果建立系統匹配的模型並進行經濟效益分析，發現太陽電池直驅式冷氣系統在夏季用電尖峰負載時段使用，其單位製冷成本較傳統冷氣更為低廉。且系統適合架設在日照輻射量較充足的地方，除此之外，根據各個地區的氣候型態，系統不宜搭配過大的太陽電池瓦數，否則會導致單位製冷成本反而提高，造成浪費。

In this research, a solar air-conditioning system for direct driving is designed on nearly Maximum Power Point Operation (nMPPO). Besides, discuss the relationship between the solar air-conditioning system for direct driving operation situation and changes in the amount of radiation. Discussion can be divided into two parts, (1) the cumulative amount of radiation for all day on the air conditioning system operating situation; (2) instantaneous changes in the amount of radiation effects the operation of air-conditioning system. The study found that the cumulative amount of radiation on the operation ratio of air-conditioning system generally showed a linear relationship. The cooling capacity and the cumulative amount of radiation is roughly positively correlated. In addition, the operation ratio of air-conditioning system also affected by the weather that day, including (1) the distribution of radiation (2) the rapid changes in the amount of radiation. In this research, discusses the effect of air-conditioning system design on the operating ratio. The study found that the system battery capacity increased, but the same wattage of solar cells, the operation ratio of air-conditioning system has not significantly improved. Thus, the operation rate of air-conditioning system is mainly decided by the wattage of solar cells. Finally, this study explores the economic benefits of air-conditioning system for direct driving. To establish the system model from the experimental results and the analysis the economic benefits found that using solar air-conditioning for direct driving in the summer electricity peak load, unit cost of cooling is lower than the conventional air-conditioning. System is suitably set up in areas where solar radiation is adequate. According to local weather patterns, the system should not be designed too large wattage of solar cells because it will increase unit cost of cooling.