發(fā)布時(shí)間：2018-04-20 09:15

  本文選題：蒸發(fā)式冷凝器 + 參數(shù)設(shè)計(jì)　； 參考：《哈爾濱商業(yè)大學(xué)》2017年碩士論文

【摘要】：制冷行業(yè)的能耗在我國全年能耗中占很大的比例。在制冷行業(yè)中,設(shè)備的節(jié)能與否直接關(guān)系水力和電力的資源浪費(fèi)問題,因此制冷系統(tǒng)的節(jié)能問題迫在眉睫。蒸發(fā)式冷凝器是制冷系統(tǒng)中換熱效率較高的換熱器,具有高效節(jié)能、結(jié)構(gòu)緊湊等優(yōu)點(diǎn),在制冷行業(yè)中備受關(guān)注,近幾年對(duì)蒸發(fā)式冷凝器的研究越來越深入。本文依據(jù)節(jié)能減排的基本要求,對(duì)蒸發(fā)式冷凝器進(jìn)行分析計(jì)算,結(jié)合實(shí)際工程應(yīng)用,對(duì)其優(yōu)化改進(jìn),為蒸發(fā)式冷凝器改進(jìn)和節(jié)能優(yōu)化提供理論依據(jù)。主要工作內(nèi)容如下:(1)根據(jù)蒸發(fā)式冷凝器內(nèi)部流體之間的傳熱過程,以工程應(yīng)用為例,設(shè)計(jì)出所需設(shè)備結(jié)構(gòu)型式,確定主要設(shè)備的選型,并對(duì)蒸發(fā)式冷凝器相關(guān)參數(shù)進(jìn)行計(jì)算;(2)通過數(shù)值模擬,得出換熱盤管管壁的溫度變化,進(jìn)而求出管壁平均溫度,為下一步計(jì)算打下基礎(chǔ);(3)采用數(shù)值實(shí)驗(yàn)研究的方法研究了蒸發(fā)式冷凝器換熱情況。重點(diǎn)研究了叉排和順排兩種管束結(jié)構(gòu)形式以及相對(duì)位置關(guān)系對(duì)蒸發(fā)器內(nèi)部流動(dòng)和換熱的影響。數(shù)值實(shí)驗(yàn)研究的結(jié)果表明,叉排管束形式更有利于蒸發(fā)式冷凝器內(nèi)管外流體與制冷劑之間的換熱,降低制冷劑溫度。同時(shí),獲得最佳管束間距;(4)分析了影響蒸發(fā)式冷凝器的工作性能的因素。提出在蒸發(fā)式冷凝器內(nèi)增加預(yù)熱結(jié)構(gòu)降低水垢形成的改進(jìn)方案。預(yù)熱部分采用翅片管形式,根據(jù)所設(shè)計(jì)蒸發(fā)式冷凝器的結(jié)構(gòu)、用水量等參數(shù),計(jì)算了預(yù)熱部分翅片管長度等參數(shù)。
[Abstract]:The energy consumption of refrigeration industry accounts for a large proportion of the annual energy consumption in China. In the refrigeration industry, the energy saving of the equipment is directly related to the waste of water and electricity resources, so the energy saving problem of the refrigeration system is urgent. Evaporative condenser is a heat exchanger with high heat transfer efficiency in refrigeration system, which has the advantages of high efficiency and energy saving, compact structure and so on. It has attracted much attention in refrigeration industry. In recent years, the research on evaporative condenser has been more and more in-depth. According to the basic requirements of energy saving and emission reduction, the evaporative condenser is analyzed and calculated in this paper. Combined with the practical engineering application, the evaporative condenser is optimized and improved, which provides a theoretical basis for the improvement of evaporative condenser and the optimization of energy saving. The main work is as follows: (1) according to the heat transfer process between the internal fluids of the evaporative condenser, taking the engineering application as an example, the structure type of the required equipment is designed and the type selection of the main equipment is determined. The relevant parameters of evaporative condenser are calculated. By numerical simulation, the temperature change of the tube wall of the heat transfer coil tube is obtained, and the average temperature of the tube wall is obtained. The heat transfer of evaporative condenser is studied by numerical experiment. The influence of two kinds of bundles structure and relative position on the internal flow and heat transfer of evaporator was studied. The results of numerical experiments show that the cross-row tube bundles are more favorable to the heat transfer between the internal and external fluid and the refrigerant in the evaporative condenser and reduce the refrigerant temperature. At the same time, the optimal bundle spacing is obtained. The factors affecting the working performance of evaporative condenser are analyzed. An improved scheme of adding preheating structure to evaporative condenser to reduce the formation of scale is put forward. The preheating part is in the form of finned tube. According to the structure and water consumption of the evaporative condenser, the parameters such as the length of the preheated partial fin tube are calculated.
【學(xué)位授予單位】：哈爾濱商業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB657;TK172

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