- 學位論文
特殊空調系統空氣側規劃設計之模擬分析與效益研究
Numerical Analysis and Benefit Study on Various Air-Side Design Approaches in Special HVAC Systems
摘要
大氣環境溫度逐年升高，空調系統的需求也十分普及，但是空調系統的用電量卻是快速增加，為了抑制及降低空調系統之尖峰用電量，勢將投入大量具專業能力之人力與龐大之資源來研究，才足以發揮出降低空調系統耗能之具體成效。因此，如何以更具效率、更易執行之方式進行節能技術研究，為現階段重要的課題。 本研究係針對特殊空調系統之空氣側進行評估及分析，並以數值模擬之方式進行空氣側系統各種參數之探討。整體研究係以高速電腦中心及捷運系統等二種不同用途的大型特殊空間的空調區域之空氣側作為系統探討之案例；針對這兩個案例分別進行空調氣流模擬分析、室內空調現況實地量測與改善規劃、以及對不同區域進行消防排煙避難的規劃驗證。對該目標區域進行空調現況檢討、改善規劃與後續施工施作進行空調改善設計規範之擬定，並透過CFD數值模擬最佳之送風口與回風口配置。本研究成功的透過空調設計與計算流體力學結合進行氣流數值模擬分析，提出一套空調改善建議方案使區域內部之室內環境維持在設計條件而又能有效的抑制空調用電有突破性之貢獻。 本研究在高速電腦中心之評估中發現出回風口之配置對整體空間溫度之分佈影響最大，對空調耗能之降低能產生較大之效果；成功建立之數據機房類空調系統之分析模式並提供未來進行設計時對出回風口配置之重要參考依據。 本研究成功地以一維模式之分析結果，提供做為三維CFD細部模擬之邊界條件做進一步分析；成功建立之隧道通風系統之分析模式並提供未來進行捷運系統通風及消防排煙之重要參考依據。
並列摘要
The rising of atmospheric temperature has increased the demand for air-conditioning system. This also induced a rapid increasing in electricity consumption. In order to reduce the peak power consumption in air conditioning system, we need to invite a lot of professional engineer and spend huge resource to develop more efficient technology. In this way, we can effectively reduce the energy consumption for air-conditioning systems. Therefore, the more efficient and easier way to perform the energy audit and realize the energy saving technology is needed to be developed at this stage. This also can enhance and strengthen the effectiveness of energy-saving in air-conditioning system. This research will focus on the design analysis and evaluation of air-side in the air-conditioning system for some large scale and special purpose system. We will adopt two different purposes of large air-conditioning system - high-speed computer center and mass rapid transit systems as the sample case in our study. We will perform the air-flow numerical simulation, the status of indoor air flow field measurement and improvement plan, and fire smoke in different regions for refuge plan validation with this physical model. We will review the current status of these air-conditioning systems and propose the improvement plan to improve the design specification for future construction works. The CFD (computational fluid dynamics) simulation is also employed to decide the optimum arrangement or configuration of air inlet and outlet. In this study, air conditioning design in conjunction with computational fluid dynamics simulation of airflow is performed. An improvement plan is also proposed so that a comfortable indoor temperature condition can be maintained and effectively restrain the energy consumption and comply with fire regulations. In this study, we found that the arrangement of outlet for supply air and return air shown a significant influence on the temperature distribution inside the space and energy consumption for cooing requirement. We have successful established the model to analyze the air-conditioning system for the data center and provide the useful information for the design of supply and return air port for large air-conditioning system. This study also employs the results from one-dimensional analysis as the boundary conditions of three-dimensional CFD simulation for further analysis. We have successful established the analysis model for the tunnel ventilation system. This can be employed as the design guide for the design of ventilation and fire smoke in the rapid transit system.