- 學位論文
空調系統動態效率之控制及運算方法研究
The Study on the Computation and Contral of Dynamic Efficiency of Air-Conditioning System
摘要
中央空調系統占建築物耗能的50%，毫無疑問的，若要確實達到節約能源目的，從中央空調系統著手將是重要目標之一，也是最具成效的方式。根據過去耗電監測成果可知空調系統之主要耗電可分為主機耗電、送風系統耗電及送水系統耗電，其耗電比例大約為55%、25%、20%，但都以主機COP作為效率指標，應該是要將其他設備一併納入計算系統之COP作為空調系統的效率指標。 本研究引入系統效率之觀念，定義中央空調系統之效率，從過去之主機性能係數(COP)改為系統性能係數(System COP)，如此實際反應中央空調系統使用之電力，將可納入中央空調系統監測之標準。結合ASHRAE以及相關文獻所提出用來計算空調設備的經驗公式，提出中央空調系統主要耗電部份之耗電計算公式，可動態計算系統之耗電及效率，用於與動態測量得之耗電量作比較，比較後，發現計算的系統效率與實際量測的系統效率相差不大。並將運算方法撰寫成運算模擬軟體，提供給空調系統設計者和管理者在設計或是運轉管理上有個簡易的系統效率運算做為能源效率管理之工具。
並列摘要
The energy consumption of HVAC systems often account for 50% of the building total. Undoubtedly, air-conditioning systems are to be the major targets for building energy saving. Energy saving from HVAC systems will also be most effective. According to the past monitored data, the major power consumptions of air-conditioning systems are the chiller, air supply system and water supply system, respectively about 55%，25% and 20%. Usually the chiller COP (coefficient of performance) is taken as the indicator of system efficiency. However, more properly, all the system equipments should be included to consider the system COP, which is a more proper efficiency index for central air-conditioning systems. This research introduces the concept of system efficiency, from the present that uses only the chiller COP for energy saving consideration. This will reflect the actual power consumption of the HVAC systems, so that it can be included in the energy monitoring standards of the HVAC. This research used the references from ASHRAE and empirical equations from related literatures, so to calculate the dynamic energy consumption and efficiency of the air- conditioning equipments. The computation scheme developed in this research was used for comparison with actual running data and good agreement was found. Computer program that can be imbedded into energy monitoring system was written in this study. This program can provide the designers and managers of the air-conditioning system an effective tool for system efficiency calculation that is necessary for building energy management.