本文選題：區(qū)域供冷　切入點：冷源方案　出處：《西安建筑科技大學》2017年碩士論文

【摘要】：區(qū)域供冷系統(tǒng)冷源方案的選擇是區(qū)域供冷系統(tǒng)設計的一個重要環(huán)節(jié)。冷源方案的選擇關系到整個系統(tǒng)的初投資、運行費用、運行能耗以及對環(huán)境的影響。因此,客觀全面地對區(qū)域供冷系統(tǒng)冷源方案進行比較分析,以可持續(xù)發(fā)展的思路確定合理的冷源方案對區(qū)域供冷系統(tǒng)的進一步優(yōu)化和發(fā)展有一定推動作用。本文以夏熱冬冷地區(qū)中的典型代表城市重慶作為研究對象,建立該地區(qū)的典型公共建筑模型,并對其采用區(qū)域供冷系統(tǒng)時的冷源方案進行優(yōu)選研究。從經(jīng)濟、技術、環(huán)境三個方面對四種冷源方案進行對比,并利用層次分析法綜合考慮經(jīng)濟指標、技術指標和環(huán)境指標對冷源方案選擇的影響,得到不同情況下四種冷源方案的優(yōu)選排序�；趪鴥�(nèi)外區(qū)域供冷系統(tǒng)的研究現(xiàn)狀,結(jié)合該地區(qū)區(qū)域供冷技術應用的實際情況,確定四種典型的冷源方案為本文的研究對象:壓縮式制冷機組作為冷源的冷源方案、吸收式制冷機組作為冷源的冷源方案、壓縮式制冷機組與冰蓄冷技術結(jié)合的冷源方案和利用吸收式制冷機組制冷的冷熱電三聯(lián)供系統(tǒng)作為冷源的冷源方案。針對四種冷源方案的經(jīng)濟性分析,本文首先建立了辦公建筑、商場建筑和酒店建筑三類典型公共建筑模型,并對其負荷進行計算。以此為基礎計算了四種冷源方案的初投資費用和運行費用,得到壓縮式制冷機組作為冷源時的初投資費用最低,冰蓄冷方案的運行費用最低。然后,利用費用現(xiàn)值法計算四種冷源方案的經(jīng)濟指標,得到冰蓄冷方案的經(jīng)濟性最好。針對四種冷源方案的技術性分析,本文從能量轉(zhuǎn)換效率入手,結(jié)合一次能源的使用情況,計算四種冷源方案中既能反映能源利用情況又能反映能量轉(zhuǎn)換情況的一次能源利用率,得到冷熱電三聯(lián)供方案的一次能源利用率最高,從而得到評價冷源方案的技術指標。利用綜合評價方法對四種冷源方案的環(huán)境影響進行分析,得到冷熱電三聯(lián)供方案的綜合評價值最小,則其對環(huán)境的影響最小。最后利用層次分析法綜合考慮經(jīng)濟指標、技術指標和環(huán)境指標對冷源方案選擇的影響,根據(jù)各指標相對重要性的不同,得到不同情況下四種冷源方案的優(yōu)選排序,當經(jīng)濟指標較重要時,冰蓄冷方案最優(yōu);當技術指標或環(huán)境指標較重要時,冷熱電三聯(lián)供方案最優(yōu)。
[Abstract]:The selection of cold source scheme for regional cooling system is an important link in the design of regional cooling system. The selection of cold source scheme is related to the initial investment, operation cost, operating energy consumption and environmental impact of the whole system. The cold source schemes of regional cooling system are compared and analyzed objectively and comprehensively. The rational cold source scheme can promote the further optimization and development of the regional cooling system. This paper takes Chongqing, a typical city in the hot summer and cold winter area, as the research object. The model of typical public buildings in this area is established, and the cold source scheme when it adopts regional cooling system is studied. Four cold source schemes are compared from three aspects: economy, technology and environment. The influence of economic index, technical index and environment index on cold source scheme selection is considered synthetically by analytic hierarchy process (AHP), and the optimal selection order of four cold source schemes under different conditions is obtained. Based on the current research situation of regional cooling system at home and abroad, According to the application of regional cooling technology in this area, four typical cold source schemes are selected as the object of this paper: the compression refrigeration unit as the cold source, the absorption refrigeration unit as the cold source, the absorption refrigeration unit as the cold source, and the absorption refrigeration unit as the cold source. The cold source scheme of compressing refrigeration unit combined with ice storage technology and the cold source scheme using the cold heat and electricity triple supply system of absorption refrigeration unit as the cold source. The economic analysis of four kinds of cold source schemes is carried out. In this paper, three typical public building models, namely office building, shopping mall building and hotel building, are established, and their loads are calculated. Based on these models, the initial investment cost and operating cost of four cold source schemes are calculated. It is obtained that the initial investment cost of the compressor refrigeration unit is the lowest and the operation cost of the ice storage scheme is the lowest when the compressor is used as the cold source. Then, the economic indexes of the four cold source schemes are calculated by using the present cost value method. According to the technical analysis of four cold source schemes, this paper starts with the energy conversion efficiency and combines the use of primary energy. The primary energy efficiency of the four cold source schemes, which can reflect both the energy utilization and the energy conversion, is calculated. Therefore, the technical index of evaluating cold source scheme is obtained. The environmental impact of four cold source schemes is analyzed by using comprehensive evaluation method, and the comprehensive evaluation value of three cold source schemes is obtained as the minimum. Finally, the analytic hierarchy process (AHP) is used to synthetically consider the influence of economic, technical and environmental indicators on the selection of cold source schemes, according to the relative importance of each index. The optimal selection order of four cold source schemes under different conditions is obtained. When the economic index is more important, the ice storage scheme is optimal, and when the technical index or environmental index is more important, the cold heat and electricity triple supply scheme is the best.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU831

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