氣冷式冰水主機舒適度節能應用

Application of Air - Cooled Chiller for Comfort and Energy Saving

蘇群仁(Chin-Ren Su)

指導教授 ： 張永宗

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2012年)

摘要

隨著經濟的成長，對電力與石油等能源之需求不斷增加，使用傳統定頻運轉的中央空調系統已不符於節能時代之需求。在缺水的氣候條件下，利用空氣方式散熱的氣冷式主機較需要用水為冷卻媒介的空調系統更具有強力的優勢。本文使用變頻器對原本定頻的小型3RT中央空調氣冷冰水主機的壓縮機進行變頻控制，室內送風機與冰水泵維持固定頻率運轉。利用熱舒適度PMV=0.5為比較基準記錄其耗電量之變化，探討冰水主機之壓縮機與散熱風扇在符合舒適度的前提下進行變頻控制的節能空間。
實驗結果指出，在定頻運轉下壓縮機平均耗電量為2.62kW，散熱風扇平均耗電量為0.33kW；變頻運轉下壓縮機平均耗電量為2.38kW，散熱風扇平均耗電量為0.29kW。經過變頻控制後壓縮機可以節省9%的耗電量，散熱風扇可以省約14%之耗電量，具有相當顯著的節能成果。

關鍵字

氣冷式冰水主機 ； 舒適度 ； 變頻 ； 節能

並列摘要

Economic growth has greatly increased the use of electrical energy and petroleum. The traditional air conditioning systems can not satisfy the energy saving requirement current. Under the climatic condition which is short of water, the air cooled chillers have strong advantages and adapt to the climate. This study used the 3 Ton air cooled chilled water system with variable frequency control. The Predicted Mean Vote (PMV) is used to be the reference which is PMV=0.5. To discuss the energy efficiency between the compressor and the chiller's cooling fan for variable frequency.
The experimental result points out, the average power consumption of the compressor is 2.62kW on constant frequently control, and the average power consumption of the cooling fan is 0.33kW. The average power consumption of compressor is 2.38kW on variable frequency control and the average power consumption of the cooling fan is 0.29kW on variable frequency. After variable frequency control, the compressor can save 9% of the power consumption; the cooling fan can save about 14% of the power consumption. This method has significant energy saving achievements.

並列關鍵字

Air cooled chiller ； Comfort ； Variable frequency ； Energy saving

參考文獻

[17] 盧浩仁，「需量反應中卸載最佳化之設計」，國立台北科技大學自動控制研究所碩士論文，2005年7月，第55~62頁。　

[24] 陳湘中，「變頻器及直接數位控制器在空調系統中之節能應用」，淡江大學電機工程學系碩士在職專班學位論文，2006年，第8-31頁。

[4] 建築物能源管理網站，http://www.tabc.org.tw/joomla/index.php?option=com_content&task=view&id=27&Itemid=72

[9] Ashfaque Ahmed Chowdhury,M.G. Rasul,M.M.K. Khan, “Modeling and analysis of air-cooled reciprocating chiller and demand energy savings using passive cooling” Applied Thermal Engineering, Volume 29, Issues 8–9, June 2009, Pages 1825–1830

[10] F.W. Yu, K.T. Chan, “Improved energy performance of air-cooled chiller system with mist pre-cooling” Applied Thermal Engineering, Volume 31, Issue 4, March 2011, Pages 537–544