本文關鍵詞： 空調(diào)系統(tǒng) 冷凍站及冷凍水系統(tǒng) 用戶側整體模型 模擬計算 設計應用　出處：《清華大學》2013年碩士論文　論文類型：學位論文

【摘要】：空調(diào)冷凍站及冷凍水系統(tǒng)是空調(diào)系統(tǒng)的重要組成部分，其設計水平和實際運行管理會直接影響空調(diào)系統(tǒng)的能耗。通過大量的文獻調(diào)研和實地測試，發(fā)現(xiàn)在空調(diào)冷凍水系統(tǒng)的運行和設計中存在著許多問題，如實際運行中冷凍水系統(tǒng)的“大流量小溫差”現(xiàn)象、冷凍水系統(tǒng)形式的選擇等。由于空調(diào)冷凍站及冷凍水系統(tǒng)的復雜性，影響因素眾多，在分析設計方案時，需要我們對全年工況進行計算分析，這就需要既能反映實際現(xiàn)象又計算功能完備的模擬軟件。目前較常用的能耗模擬軟件雖然具有空調(diào)冷凍站全年能耗模擬計算的功能，但無法反映冷凍水系統(tǒng)的實際運行特性，，其關鍵問題是這些軟件缺少反映用戶側水系統(tǒng)整體性能的模型。用戶側水系統(tǒng)的整體特性決定了冷凍站的運行性能，但目前關于用戶側整體特性的研究成果較少，因此，本論文的主要研究目標是通過實際運行數(shù)據(jù)與模擬結果的比較，建立合理的用戶側整體模型，從而實現(xiàn)冷凍站和用戶側的聯(lián)合模擬計算，以輔助解決設計階段的實際問題。 首先，本文從單個盤管的實際運行數(shù)據(jù)與換熱模型出發(fā)，分析單個盤管的動態(tài)控制特性，并確定影響換熱性能的關鍵因素。其次，根據(jù)盤管水閥控制的不同特點，本文分別針對連續(xù)控制盤管和通斷控制盤管的水系統(tǒng)整體特性，進行了實際數(shù)據(jù)與模擬計算結果的對比，歸納其關鍵性影響因素，最終分別建立了兩者的用戶側整體模型。然后，結合用戶側水系統(tǒng)的整體模型和冷站計算模型，建立了冷凍站及冷凍水系統(tǒng)的聯(lián)合模擬計算方法，并在程序中實現(xiàn)。最后，本文對兩種空調(diào)末端形式的冷凍水系統(tǒng)進行了不同工況下的模擬計算，包括一級泵變頻控制運行工況和過渡季提高冷機出水溫度的節(jié)能效果。本文為冷凍站及冷凍水系統(tǒng)的設計提供了一種全工況的模擬計算方法，可以為實際設計問題提供幫助，如冷凍水系統(tǒng)形式的選擇、供水溫度設計、壓差控制等，也可以通過對各種技術手段的全工況模擬，來比較分析技術手段的運行性能和能耗水平。 本文的工作使得我們更加理解用戶側冷凍水系統(tǒng)的整體特性，并提供有效的整體模型用于冷凍站的模擬計算，為解決設計階段的實際問題提供幫助。
[Abstract]:Air conditioning refrigeration station and chilled water system are important parts of air conditioning system. Its design level and actual operation management will directly affect the energy consumption of air conditioning system. It is found that there are many problems in the operation and design of air conditioning chilled water system, such as the phenomenon of "large flow and small temperature difference" in the actual operation of the chilled water system. Because of the complexity of the air conditioning refrigeration station and the chilled water system, there are many influencing factors. When we analyze the design scheme, we need to calculate and analyze the whole year's working conditions. This requires a simulation software that can reflect both the actual phenomenon and the complete calculation function. Although the energy consumption simulation software which is commonly used at present has the function of simulating and calculating the annual energy consumption of the air conditioning refrigeration station, it cannot reflect the actual operation characteristics of the refrigerated water system. The key problem is that these software lack models that reflect the overall performance of the user-side water system. The overall characteristics of the user-side water system determine the operation performance of the refrigeration station, but there are few research results on the overall characteristics of the user-side water system. The main research goal of this paper is to establish a reasonable overall model of the user side by comparing the actual operation data with the results of simulation so as to realize the joint simulation calculation between the freezing station and the user side in order to help solve the practical problems in the design phase. Firstly, based on the actual operation data and heat transfer model of a single coil, the dynamic control characteristics of a single coil are analyzed, and the key factors affecting the heat transfer performance are determined. Secondly, according to the different characteristics of the control of the coil water valve, In this paper, according to the whole characteristics of the water system of the continuous control coil and the on-off control coil, the comparison between the actual data and the simulation results is carried out, and the key influencing factors are summarized. Finally, the user side integral model of the two systems is established respectively. Then, combined with the whole model of the user side water system and the cold station calculation model, the combined simulation calculation method of the refrigeration station and the refrigerated water system is established and realized in the program. Finally, In this paper, two kinds of air conditioning end forms of chilled water system are simulated under different working conditions. This paper provides a simulation calculation method for the design of refrigerating station and chilled water system, which can be helpful to the practical design, including the operation condition of frequency conversion control of the first stage pump and the energy saving effect of increasing the outlet temperature of the cooler during the transition period, this paper provides a simulation calculation method for the design of the refrigeration station and the chilled water system. For example, the selection of refrigerated water system form, the design of water supply temperature, the control of pressure difference and so on, can also compare and analyze the operation performance and energy consumption level of technical means by simulating the whole operating condition of various technical means. The work of this paper makes us better understand the overall characteristics of the user-side chilled water system, and provide an effective global model for the simulation calculation of the refrigeration station, which can help to solve the practical problems in the design phase.
【學位授予單位】：清華大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU831

【參考文獻】

相關期刊論文 前10條

1 馬樹連;;風機盤管機組冷、熱量綜合表達式與應用[J];建筑技術通訊(暖通空調(diào));1988年03期

2 朱偉峰,江億,薛志峰;空調(diào)冷凍站和空調(diào)系統(tǒng)若干常見問題分析[J];暖通空調(diào);2000年06期

3 孟彬彬,朱穎心,林波榮;部分負荷下一次泵水系統(tǒng)變流量性能研究[J];暖通空調(diào);2002年06期

4 謝曉娜,宋芳婷,燕達,江億;建筑環(huán)境設計模擬分析軟件DeST 第2講 建筑動態(tài)熱過程模型[J];暖通空調(diào);2004年08期

5 燕達,張野,江億;建筑環(huán)境設計模擬分析軟件DeST 第7講 空氣處理設備方案模擬分析[J];暖通空調(diào);2005年01期

6 夏建軍,燕達,江億;建筑環(huán)境設計模擬分析軟件DeST 第9講冷熱源與水系統(tǒng)模擬分析(上)[J];暖通空調(diào);2005年03期

7 燕達 ,夏建軍 ,劉燁 ,張曉亮 ,江億;建筑環(huán)境設計模擬分析軟件DeST 第9講 冷熱源與水系統(tǒng)模擬分析(下)[J];暖通空調(diào);2005年04期

8 汪訓昌;;空調(diào)冷水系統(tǒng)的沿革與變流量一次泵水系統(tǒng)的實踐[J];暖通空調(diào);2006年07期

9 閆軍威;朱冬生;周璇;;區(qū)域集中供冷系統(tǒng)冷量調(diào)節(jié)新技術[J];暖通空調(diào);2007年10期

10 常晟;魏慶們;蔡宏武;謝俊駿;陳永康;吳稼培;陳盛業(yè);;空調(diào)系統(tǒng)節(jié)能優(yōu)化運行與改造案例研究(2):冷水系統(tǒng)[J];暖通空調(diào);2010年08期

本文編號：1550444