中壓冷媒注入對雙段磁浮離心壓縮機性能與碳排影響之研究

10.29911/JEHVACE_NEW.202309_(141).0007

林俊傑；鐘震麒；劉中哲；蘇立康；洪國書

磁浮離心式壓縮機 ； 性能係數 ； 等熵效率 ； Magnetic bearing centrifugal compressor ； Coefficient of performance ； Isentropic efficiency

冷凍空調&能源科技

141期（2023 / 09 / 10）

76 - 82

繁體中文;英文

本研究探討應用雙段壓縮磁浮離心壓縮機，採用雙壓縮機結合閃蒸筒型中壓節能器所設計之240USRT單冷媒循環冰水機系統，中壓冷媒注入量對其雙段壓縮冷凍循環性能的影響。本設備於工研院TAF認證冰水機性能測試實驗室進行CNS12575全載、AHRI Standard 551/591部分負載IPLV之冰水機性能測試分析，參考ANSI/ASHRAE Standard 225-2020規範分析雙段壓縮離心壓縮機等熵效率，評估能源效率對碳排放量的影響。實測全載效率COP為6.48與部分負載IPLV為10.651，壓縮機雙段壓縮於全載時之等熵效率為0.736，部分負載的雙段壓縮等熵效率分別為0.734、0.735、0.714、0.666，將等熵效率代入冷凍循環分析軟體，所得之部分負載COP與實測值誤差為-0.9%、0.2%、-0.9%、-2.2%。根據本研究對1級能源效率雙壓縮機與2級能源效率單壓縮機之冰水機實測研究結果，透過電力排碳轉換係數分析評估其年碳排放量的差異，冰水機運轉時數越長及負載越大將使耗電量越大，因此推廣與採用具高性能效率之多壓冰水機組，將可大幅降低碳排放量。

This study investigates the effect of economizer injection on the two-stage refrigeration cycle of dual-compressor single chiller system combined with a flash tank the rated capacity of 240 USRT designed using two-stage compression magnetic bearing centrifugal compressor on its performance. The COP and IPLV performance tests were based on CNS and AHRI 551/591 standards, and conducted by the TAF certified water chiller performance test laboratory of ITRI. Analyze the isentropic efficiency of the two-stage compression centrifugal compressor with reference to ANSI/ASHRAE Standard 225-2020, and evaluate the impact of energy efficiency on carbon emissions. The two-stage compression isentropic efficiency are CNS 0.736, IPLV 0.734, 0.735, 0.714, and 0.666, respectively. Substituting the isentropic efficiency into the refrigeration cycle analysis software, the partial load COP have errors of -0.9%, 0.2%, -0.9%, and -2.2% to the measured value. According to this study on the chiller with dual compressors of energy efficiency level 1 and the chiller with single compressor of energy efficiency level 2, the difference in annual carbon emissions is evaluated through the analysis of electricity carbon emission factor. The longer the chiller runs and the greater the cooling capacity will consume more energy. Therefore, the promotion and adoption of multi-compressor chillers with high COP and IPLV will greatly reduce carbon emissions.

1. (2020).ANSI/ASHRAE Standard 225-2020,Method for Performance Testing Centrifugal Refrigerant Compressors and Condensing Units,2020..
2. 蒸氣壓縮式冰水機組容許耗用能源基準CNS12575 與能源效率分級標示事項方法及檢查方式。
3. AHRI Standard ANSI/AHRI Standard 551/591 (SI),Performance Rating of Water-chilling and Heat Pump Water-heating Packages Using the Vapor Compression Cycle,2020..
4. 林俊傑,鐘震麒,劉中哲,劉敏生,洪國書。壓磁浮冰水機應用案例研究。冷凍空調與能源雜誌
5. 林俊傑,鐘震麒,劉中哲,蘇立康,洪國書。雙段壓縮磁浮離心冰水機之節能器壓力影響性能研究。冷凍空調與能源雜誌