- 學位論文
螺旋式冰水主機一次側變流量節能分析
Energy Saving Analysis of Variable Primary Flow System with Screw Chiller
摘要
中央空調系統一次側的冰水流量一直以來都是以定流量操作，本文主要討論冰水主機之中央空調系統一次側變流量的節能操作運用，這個概念是1999年Trane首先提出，剛開始因為牽涉的複雜性讓很多人抱持觀望與懷疑的態度，越來越多的成功案例逐漸提高市場的接受度。 降低冰水流量對冰水泵浦而言一定是減少耗電的，但對冰水主機的蒸發器而言熱傳係數改變了，蒸發溫度也可能改變，因此冰水主機的耗電也可能改變，所以本研究論文探討冰水流量對冰水主機效能的影響，加上冰水泵浦變流量的節能效益，整合出最佳整體效益的冰水流量。 本研究方法是以迴歸分析作為理論依據，求出冰水主機耗電量與冰水流量、冰水出水溫度、冷卻水進水溫度、部份負載的關係方程式。也求出冰水泵浦耗電量與冰水流量的關係方程式。找出負載在不同流量的耗電變化曲線，得到冰水主機與冰水泵浦在各種負載下最節能的冰水流量。
並列摘要
Chilled water primary flow of central air conditioning system has been a constant flow operation. The paper focuses on the central air conditioning system of the chilled water primary variable flow of energy-saving operation. The concept is Trane first proposed in 1999, At the beginning , many people hold the altitude of doubt because of the complexity it involves . However, more and more successful cases are gradually raising the marketing acceptance . Decreasing the primary flow rates can obviously save energy from water pump, but the heat transfer coefficient of the evaporator changes at the same time, as well as the temperature of evaporation. These changes might influence the energy consumption. Therefore, the benefit of energy-saving by VPF of the pump is discussed with the primary flow rates to find the flow rates with the most efficiency. This research is based on the regression analysis to derive the equation between the power consumption of chiller and the primary flow rates, the temperature of extracted chilled water, the temperature of infill cooling water and the partial loads, as well as the equation between the power consumption of the pump and the primary rates. Finally, obtain the curve of partial loads and electric consumption vary with primary flow rates, and find the best energy-saving efficiency of primary flow rates under the loads of chiller and pump.