本文選題：海水 + 熱泵�。� 參考：《天津科技大學(xué)》2013年碩士論文

【摘要】：海水源熱泵空調(diào)具有高效、節(jié)能、環(huán)保等諸多優(yōu)點,已被國內(nèi)外許多沿海城市所采用,是國家“十二五”規(guī)劃重點推廣的能源項目。然而海水源熱泵空調(diào)的推廣卻面臨諸多障礙,其中就包括在冬季低溫海水工況下無法穩(wěn)定高效運行的問題,針對這一難題,本文對低溫海水工況下海水源熱泵空調(diào)的運行性能進行了研究。 首先,對套管式換熱器和噴淋豎板式換熱器進行了結(jié)構(gòu)介紹和性能分析,分別對二者的傳熱過程建立了數(shù)學(xué)模型,并通過求解數(shù)學(xué)模型,得到其作為海水源熱泵中間換熱器時海水入口溫度、海水流速等關(guān)鍵參數(shù)對其流動性能和傳熱性能,以及對整個熱泵系統(tǒng)制熱系數(shù)(COP)和制熱量的影響,并分析了造成這些影響和規(guī)律的原因。 其次,分別對兩種換熱器在結(jié)冰時的傳熱過程進行分析,建立數(shù)學(xué)模型并求解,得到其在結(jié)冰時的特性規(guī)律：套管式換熱器存在結(jié)冰堵塞流道,使換熱無法繼續(xù)進行,進而使熱泵機組停機,甚至有損壞設(shè)備的危險；而噴淋板式換熱器可以帶冰連續(xù)工作,但其在冰層厚度達到一定程度后,傳熱性能會急劇下降。同時,定義了套管式換熱器冰堵率的概念,給出其可以安全運行的工況范圍；定義了噴淋板式換熱器熱阻占比率的概念,給出其可以高效穩(wěn)定運行的工況范圍,并提出了除冰融冰的方案建議。 最后,搭建了低溫海水工況下海水源熱泵中間換熱器性能測試實驗臺,分別對套管式換熱器和噴淋板式換熱器的傳熱性能,以及對熱泵系統(tǒng)制熱系數(shù)(COP)和制熱量的影響進行了測試,驗證了數(shù)學(xué)模型的可靠性。
[Abstract]:Sea water source heat pump air conditioning has many advantages, such as high efficiency, energy saving, environmental protection and so on. It has been adopted by many coastal cities at home and abroad. However, the promotion of sea water source heat pump air conditioning is faced with many obstacles, including the problem that it can not operate stably and efficiently under low temperature and seawater conditions in winter. In this paper, the operating performance of sea water heat pump air conditioning under low temperature sea water condition is studied. Firstly, the structure and performance of casing heat exchanger and spray vertical plate heat exchanger are introduced, and the mathematical models of heat transfer process are established, and the mathematical model is solved. The influence of the key parameters such as seawater inlet temperature, sea water velocity and other key parameters on the fluidity and heat transfer performance, as well as the heat production coefficient and heating capacity of the whole heat pump system, are obtained when it is used as an intermediate heat exchanger of the sea water source heat pump. The causes of these effects and laws are analyzed. Secondly, the heat transfer process of the two kinds of heat exchangers during icing is analyzed, the mathematical model is established and solved, and the characteristics of the two kinds of heat exchangers are obtained. Then the heat pump unit is shut down, even the equipment is damaged, and the spray plate heat exchanger can work continuously with ice, but when the ice thickness reaches a certain degree, the heat transfer performance will decline sharply. At the same time, the concept of ice plugging rate of casing heat exchanger is defined, and the operating condition range of safe operation is given, and the concept of thermal resistance ratio of sprinkler plate heat exchanger is defined, and the working condition range that can operate efficiently and stably is given. The proposal of deicing and melting is put forward. Finally, an experimental platform for testing the performance of an intermediate heat exchanger of a sea water source heat pump under low temperature sea water condition is built, and the heat transfer performance of the casing heat exchanger and the spray plate heat exchanger are respectively studied. The influence of the heating coefficient and heating capacity on the heat pump system is tested, and the reliability of the mathematical model is verified.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU831

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本文編號：1803374