本文選題：數據中心 + 自然冷源��； 參考：《河北工程大學》2013年碩士論文

【摘要】：能源是各國國民經濟發(fā)展的動力，關系到社會的運行和國家的安全，同時也關系到生態(tài)環(huán)境的保護和子孫后代的生存與發(fā)展，能源是必不可少的社會和經濟發(fā)展的物質前提。隨著經濟的騰飛，人類已經進入了高科技、高效率的信息時代，，信息產業(yè)的飛速發(fā)展加速了人類文明的進步，但在能源日益緊缺的今天，數據中心的高能耗已經變成了人們必須面對且亟待解決的新問題。 數據中心是信息產業(yè)的中樞系統(tǒng)，隨著信息產業(yè)技術的升級和發(fā)展，對數據中心的需求快速增長，而一線城市建設用地的限制迫使數據中心提高空間利用率，加上各類IT設備向小型化、高處理能力演變，促使數據中心逐漸向高密度方向發(fā)展。據統(tǒng)計，近十年來，數據中心IT設備功率密度從300瓦/平方米增加到超過2000瓦/平方米。單個機柜容納的設備功率從不到1千瓦增長到接近10千瓦。高密度設備布局直接帶來高密度散熱，對冷卻系統(tǒng)提出的要求越來越苛刻，導致近年來數據中心空調系統(tǒng)能耗急劇增長。 數據中心不間斷的散熱，冷負荷全年都保持在較高的水平，因此很多地區(qū)即使在冬天也要開啟制冷機組對機房降溫，很不合理。本文以上海地區(qū)某辦公樓自用型數據中心為模型，研究了間接利用自然冷源的空調輔助系統(tǒng)。 文章首先對建筑模型進行了簡單介紹，并通過DeST軟件對機房的負荷進行模擬分析，從而根據機房內逐時變動的冷負荷確定機房逐時所需的送風量及送風溫度。再根據這些數據通過對比分析出了該數據中心機房模型間接利用自然冷源的節(jié)能潛力。由于隨著室外溫度的變化，機房所需的冷風量也在變化，風機需要變頻運行，因此，文章還對換熱器的性能隨風量的變化情況進行了模擬，主要包括換熱效率、換熱量、換熱系數以及壓力損失隨冷風量的不同需求而發(fā)生的改變。其中，壓力損失的隨風量的變化趨勢可以作為風機變頻的計算依據。 通過一系列的計算與模擬，最終得出了新風間接換熱式空調輔助系統(tǒng)的年節(jié)電情況。文章最后對文中的不足之處進行了總結與展望，如該系統(tǒng)只考慮了單獨運行機房空調與單獨運行基站換熱器的情況，而沒有考慮當室外溫度雖然低于室內溫度，但無法承擔全部冷負荷時，機房空調與基站換熱器共同運行的情況。因此，在本文的計算結果的基礎上，仍有一部分節(jié)能潛力有待發(fā)掘，筆者會在今后的學習與工作中繼續(xù)探究。
[Abstract]:Energy is the driving force of the national economic development of every country, relates to the operation of the society and the security of the country, and also relates to the protection of the ecological environment and the survival and development of the future generations. Energy is the essential material premise of the social and economic development. With the rapid development of economy, mankind has entered the information age of high technology and high efficiency. The rapid development of information industry accelerates the progress of human civilization. The high energy consumption of data center has become a new problem that must be faced and solved urgently. Data center is the central system of information industry. With the upgrading and development of information industry technology, the demand for data center increases rapidly. In addition, all kinds of IT equipment to miniaturization, high processing capacity evolution, promote the development of data centers to the direction of high density. According to statistics, in the past ten years, the power density of IT equipment in data center has increased from 300W / m2 to more than 2000 W / m2. A single cabinet accommodates equipment power from less than one kilowatt to nearly 10 kilowatts. The layout of high density equipment directly brings about high density heat dissipation, and the requirement for cooling system is becoming more and more stringent, which leads to the sharp increase of energy consumption in data center air conditioning system in recent years. The data center continuously dissipates heat, the cooling load is kept at a high level all year round, so it is unreasonable to open the refrigeration unit to cool the engine room in many areas even in winter. Based on the data center of an office building in Shanghai, this paper studies the auxiliary air conditioning system which indirectly utilizes the natural cold source. This paper introduces the building model and simulates the load of the engine room by DeST software, so as to determine the air supply rate and air temperature according to the hourly cooling load in the engine room. Based on these data, the energy saving potential of the data center computer room model using natural cold source is analyzed. With the change of outdoor temperature, the amount of cold air needed in the engine room is also changing, and the fan needs frequency conversion operation. Therefore, the performance of heat exchanger with the change of air volume is simulated in this paper, including heat transfer efficiency and heat transfer. The change of heat transfer coefficient and pressure loss with different demand of cold air. The variation trend of pressure loss with air volume can be used as the basis for the calculation of fan frequency conversion. Through a series of calculation and simulation, the annual power saving of the auxiliary system of indirect heat transfer air conditioning with fresh air is obtained. At the end of the paper, the shortcomings of the paper are summarized and prospected. For example, the system only takes into account the single operation of the air-conditioning in the engine room and the heat exchanger of the base station, but not when the outdoor temperature is lower than the indoor temperature. But can not bear all the cooling load, room air-conditioning and base-station heat exchanger operation. Therefore, on the basis of the results of this paper, there is still a part of energy saving potential to be explored, the author will continue to explore in the future study and work.
【學位授予單位】：河北工程大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU831

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