溫濕度獨立控制空調系統(tǒng)在長沙地區(qū)的應用研究
本文關鍵詞: 溫濕度獨立控制空調系統(tǒng) COP 傳統(tǒng)中央空調系統(tǒng) 熱泵 新風處理系統(tǒng) 優(yōu)化 再生熱源 出處:《湖南大學》2014年碩士論文 論文類型:學位論文
【摘要】:構建節(jié)能和舒適型空調系統(tǒng)一直是我們空調領域追求的目標,特別在這個能源和環(huán)境問題突出的今天,達到這個目標的愿望更加迫切。隨著傳統(tǒng)中央空調的弊端逐漸顯露并被關注,而溫濕度獨立控制空調系統(tǒng)展現(xiàn)出了可以消除這些弊端的優(yōu)點,則人們對其的研究也越來越多,且其相關產(chǎn)品也在努力研發(fā)中。在現(xiàn)有的研究工作中,對三種常見新風除濕方法的溫濕度獨立控制空調進行統(tǒng)一對比分析的研究比較少,因此本文開展研究和優(yōu)化不同形式的溫濕度獨立控制空調系統(tǒng),這對其推廣和應用有著十分重大的指導意義。 本文首先介紹幾種典型溫濕度獨立控制空調系統(tǒng)中的新風系統(tǒng)的組成和工作原理,并分析了各個重要裝置的性能和優(yōu)缺點;之后分別列出關于三種常見除濕方式下典型THIC型空調系統(tǒng)的能耗成分和系統(tǒng)效率的計算公式,而后分別計算出某高級辦公樓在長沙地區(qū)夏季工況下各個工況點參數(shù)和三種常見新風除濕方式下典型THIC型空調系統(tǒng)的COP值,且得出同一種除濕方式下的最優(yōu)系統(tǒng)形式,并與傳統(tǒng)中央空調系統(tǒng)進行對比;最后通過調節(jié)各個重要狀態(tài)參數(shù)、系統(tǒng)結構和再生熱源方式對溫濕度獨立控制空調系統(tǒng)進行優(yōu)化。 本文先計算出以電加熱室外空氣為再生方式的一級和雙級轉輪除濕THIC型空調系統(tǒng)在最低理論再生溫度條件下的COP值,體現(xiàn)出雙級轉輪系統(tǒng)的優(yōu)越性,并通過比較除濕比例為1:1、1:2、2:1的雙級轉輪除濕系統(tǒng)的COP值,得出除濕比例為2:1時系統(tǒng)最優(yōu),且此除濕比例下的高溫冷水預冷式系統(tǒng)優(yōu)于排風熱回收方式,為選擇系統(tǒng)的預冷方式提供指導,且計算出雙級風冷熱泵轉輪除濕系統(tǒng)的COP值,也得出其性能值在轉輪除濕系統(tǒng)中最高;再計算一級和雙級熱泵式溶液除濕THIC型空調系統(tǒng)的COP值,,并通過比較除濕比例為1:1、1:2、2:1的雙級溶液除濕THIC型空調系統(tǒng)的COP值,得出1:2除濕比例的系統(tǒng)最優(yōu);最后通過分析比較幾種冷凝除濕THIC型空調系統(tǒng)的COP值,確定室內排風再熱送風式冷凝除濕系統(tǒng)為該種除濕方式中最優(yōu)系統(tǒng)形式。綜上比較分析,三種溫濕度獨立控制系統(tǒng)中最優(yōu)形式的COP值都比傳統(tǒng)中央空調系統(tǒng)的高,并得出長沙地區(qū)夏季工況下最優(yōu)溫濕度獨立控制空調系統(tǒng)。
[Abstract]:Building energy-saving and comfortable air conditioning system has been the goal of our air conditioning field, especially in this energy and environmental problems today. The desire to achieve this goal is more urgent. As the disadvantages of traditional central air conditioning are gradually revealed and paid attention to, the temperature and humidity independent control air conditioning system shows the advantages that can eliminate these disadvantages. People are also more and more research on it, and its related products are also in the efforts to develop. In the existing research work. There are few researches on the temperature and humidity independent control air conditioning of three common fresh air dehumidification methods, so this paper studies and optimizes the different forms of temperature and humidity independent control air conditioning system. This is of great significance to its popularization and application. In this paper, the composition and working principle of several typical air conditioning systems with independent temperature and humidity control are introduced, and the performance, advantages and disadvantages of each important device are analyzed. Then the calculation formulas of energy consumption and system efficiency of typical THIC air conditioning system under three common dehumidification modes are listed respectively. Then the COP values of typical THIC type air conditioning system under three common fresh air dehumidification modes are calculated respectively under the summer working conditions of a certain advanced office building in Changsha area. The optimal system form under the same dehumidification mode is obtained and compared with the traditional central air conditioning system. Finally, the air conditioning system with independent control of temperature and humidity is optimized by adjusting the important state parameters, system structure and regenerative heat source. In this paper, the COP value of the first stage and two-stage rotary dehumidification THIC air conditioning system with electrical heating outdoor air as regeneration mode is first calculated under the condition of the lowest theoretical regeneration temperature. This paper shows the superiority of the two-stage runner system, and by comparing the COP value of the two-stage runner dehumidification system with the dehumidification ratio of 1: 1 and 1: 2: 1, the optimal system is obtained when the dehumidification ratio is 2: 1. The precooling system with this dehumidification ratio is superior to the exhaust heat recovery system, which provides guidance for selecting the precooling mode of the system, and calculates the COP value of the two-stage air-cooled heat pump runner dehumidification system. It is also obtained that its performance value is the highest in the runner dehumidification system. The COP value of the first and two-stage heat pump solution dehumidification THIC air conditioning system is calculated, and the dehumidification ratio is 1: 1 / 1: 2 by comparison. (2) the COP value of two-stage solution dehumidification THIC air conditioning system of 1: 1 is obtained, and the system with 1: 2 dehumidification ratio is optimized. Finally, by analyzing and comparing the COP values of several condensing and dehumidifying THIC air conditioning systems, the optimal dehumidification and dehumidification system is determined. The optimal COP values of the three independent temperature and humidity control systems are higher than those of the traditional central air conditioning systems, and the optimal temperature and humidity independent control air conditioning systems in Changsha area in summer are obtained.
【學位授予單位】:湖南大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TU831
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