本文關鍵詞： 水冷式多聯(lián)機 制冷劑管路阻力損失 制冷量衰減 能效比 經(jīng)濟性分析　出處：《重慶大學》2014年碩士論文　論文類型：學位論文

【摘要】：多聯(lián)機空調系統(tǒng)，即可變制冷劑流量空調系統(tǒng)(簡稱VRV)，由日本大金公司于1982年開發(fā)推出。多聯(lián)機是在傳統(tǒng)房間分體空調器基礎上發(fā)展而來的，它實現(xiàn)了一(多)臺室外機和多臺室內(nèi)機的連接。與傳統(tǒng)的水冷冷水機組+熱水鍋爐+空調末端的中央空調相比，它具有設計、安裝、運行及維護管理簡單、方便的特點，另外它能將傳統(tǒng)中央空調系統(tǒng)的制冷機房、鍋爐房所占用的建筑空間節(jié)省出來，這在辦公、商場、賓館等房價、地價極高的建筑中，能夠節(jié)約一大筆初投資費用并可以在投入運行后獲得更多的收益。 多聯(lián)機空調目前在市場上得到了較為廣泛的應用。但隨著應用范圍的推廣，傳統(tǒng)的風冷式多聯(lián)機系統(tǒng)的一些不足逐漸暴露出來。在這樣的背景下，一種新的多聯(lián)機空調形式在20世紀興起，這就是水冷式多聯(lián)機空調系統(tǒng)。實際上可以把它看成是多聯(lián)機與水源熱泵或水環(huán)熱泵相結合的一種空調系統(tǒng)。相比于傳統(tǒng)的風冷式多聯(lián)機空調系統(tǒng)，水冷式多聯(lián)機的室外機可以實現(xiàn)分層設置，這樣就減小甚至消除了室外機和室內(nèi)機的高差，使之在高層建筑和多層建筑上可以得到推廣使用。此外，由于水冷式多聯(lián)機的制冷劑管路長度縮短，制冷劑管路的阻力損失減小，因此由于制冷劑管路過長而造成的制冷量衰減就會減小，從而增加了多聯(lián)機空調系統(tǒng)的能效比（EER）。水冷式多聯(lián)機相當于在風冷式多聯(lián)機的基礎上增加了一套水系統(tǒng)，因此勢必造成初投資的提高，因此水冷式多聯(lián)機在重慶地區(qū)的推廣和使用并沒有取得較大進展。 本文將制冷劑管段的阻力損失計算作為研究重點，通過在一個已經(jīng)設計完成的風冷式多聯(lián)機空調系統(tǒng)工程上進行改造，，設計一套水冷式多聯(lián)機空調系統(tǒng)。分別計算兩種系統(tǒng)形式下有代表性的制冷劑管路的阻力損失，并分析計算各自的制冷量衰減和系統(tǒng)能效比（EER）下降，比較兩種系統(tǒng)形式的節(jié)能性。另外計算了兩種系統(tǒng)形式下的初投資和年運行費，比較兩種系統(tǒng)形式的經(jīng)濟性，從而指導重慶地區(qū)進行水冷式多聯(lián)機空調系統(tǒng)的選用。
[Abstract]:The variable refrigerant flow air conditioning system (VRVN), developed in 1982 by Japan's Dajin Company, is a multi-on-line air conditioning system based on traditional room air conditioners. It realizes the connection between one or more outdoor units and multiple indoor units. Compared with the central air conditioning system at the end of the hot water boiler of the traditional water-cooled chillers, it has the characteristics of simple design, installation, operation and maintenance management and convenience. In addition, it can save the building space occupied by the refrigeration machine room and boiler room of the traditional central air conditioning system. This can be done in buildings with extremely high housing prices and land prices, such as offices, shopping malls, hotels, etc. It can save a lot of initial investment cost and make more profit when put into operation. Multi-on-line air conditioning has been widely used in the market at present. However, with the popularization of application scope, some shortcomings of traditional air-cooled multi-on-line system are gradually exposed. In 20th century, a new form of multi-on-line air conditioning came into being. This is the water-cooled multi-on-line air conditioning system. In fact, it can be regarded as a kind of air conditioning system combined with water source heat pump or water loop heat pump. Water-cooled multi-on-line outdoor units can be layered, which reduces or even eliminates the difference in height between outdoor and indoor units, making them widely used in high-rise buildings and multi-storey buildings. As the length of the refrigerant pipeline is shortened and the resistance loss of the refrigerant pipeline is reduced, the cooling capacity attenuation due to the long length of the refrigerant pipeline will be reduced. Thus, the energy efficiency ratio of the multi-line air conditioning system is increased. The water-cooled multi-line system is equivalent to adding a set of water system on the basis of air-cooled multi-on-line system, which will inevitably result in the increase of initial investment. Therefore, the popularization and use of water-cooled multi-line in Chongqing area has not made great progress. In this paper, the calculation of resistance loss in refrigerant pipe section is regarded as the key point of the research, and the project of air-cooled multi-on-line air conditioning system that has been designed and completed has been reformed. A set of water-cooled multi-on-line air conditioning system is designed. The resistance losses of representative refrigerant pipes under two systems are calculated, and the respective cooling capacity attenuation and the system energy efficiency ratio (EER) decrease are analyzed and calculated. In addition, the initial investment and annual operating cost of the two systems are calculated, and the economy of the two system forms is compared to guide the selection of water-cooled multi-on-line air conditioning system in Chongqing area.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU831

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