冰水主機性能提升與節能驗證方法之探討

Verification of Chiller Performance Promotion and Energy Saving

陳肇元(Chao-Yuen Chen)

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(2008年)

摘要

在台灣地區98 %的能源都必須仰賴國外進口，石油及電費一直存在著漲價的趨勢，台電近年來不論在裝置容量、發電量、售電量及用戶數等都持續成長，因此該如何節省能源將是相當重要的課題。
本論文利用迴歸分析建立冰水主機耗電量模型，將冰水主機運轉數據中的部分負載率(Partial Load Ratio，簡稱PLR)、冰水出水溫度及冷卻水入水溫度之影響參數同時考慮時，所得到的預測結果相當精準，與實際耗電量相比，在短期預測上精確率高達99%以上，透過此方法可用來驗證各項冰水主機節能方法之效益。本論文特別分析當冰水主機多部並聯運轉時，冰水流量改變對於主機性能的影響;離心式冰水主機變頻運轉與非變頻運轉之耗能分析;清洗冷凝盤管對於冰水主機性能係數（Coefficient of Performance，簡稱COP）提升之探討，其案例分析結果發現當多部主機並聯運轉時，冰水流量的改變對於主機性能影響有限，該案例當主機在部分負載時使用變頻平均可節省約36%的耗電量，而該案例清洗冷凝盤管對於主機性能係數(COP)則有約3.08%的提升效果。

關鍵字

冰水主機 ； ESCO ； 主機性能 ； 迴歸分析

並列摘要

98% of the energy needed in Taiwan has been imported. The prices of petroleum and electricity have been increasing. In addition, facility capacity, amount of electricity generation, amount of electricity consumption and number of Taiwan Power Company customers have continued to increase. For these reasons energy conservation has become an important topic.
This study employed regression analysis to set up the energy consumption models of chiller units. The regression analysis had quite accuracy under considering factors of PLR and the inlet and outlet temperatures of the chilled water and the cooling water at the operating chiller units. Compared with the actual power consumption, the accuracy of the regression analysis reached over 99% at a short-term forecast. Therefore, we could employ this method to verify the performance of various energy-saving methods of the chiller units. This study analyzed the effects of the flow rates of the chilled water on the coefficient of performance (COP) at the parallel operation of the chiller units, the energy consumption of the centrifugal chillers with or without variable frequency controls, and the effects of condenser cleaning on the COP of the chiller units. Results showed that the flow rate of the chilled water had insignificant influence on the COP at the parallel operation of the chiller units, the variable frequency control had a 36% of energy-saving at partial load operation of the chiller units, and cleaning the condenser had a benefit of 3.08% increase in COP.

並列關鍵字

Chillers ； ESCO ； Chiller Performance ； Regression analysis

參考文獻

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