本文關(guān)鍵詞： 空冷與噴淋兩用冷卻器 干工況 濕工況 模擬 運(yùn)行分析　出處：《山東建筑大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：空冷與噴淋兩用冷卻器是一種能夠很好滿足制冷要求的節(jié)能設(shè)備,并且具有環(huán)保,投入及運(yùn)行成本低的特點(diǎn),在化工、紡織等行業(yè)得到廣泛的應(yīng)用。本文針對西部地區(qū)空冷與噴淋兩用冷卻器的應(yīng)用建立數(shù)學(xué)模型進(jìn)行求解、結(jié)構(gòu)設(shè)計(jì)及優(yōu)化、數(shù)值模擬研究,分析干濕工況下空冷與噴淋兩用冷卻器各參數(shù)對冷卻性能的影響研究,為新型冷卻器在實(shí)際工程應(yīng)用設(shè)計(jì)提供選型依據(jù),具體內(nèi)容如下： 第一,對空冷與噴淋兩用冷卻器在干工況下的運(yùn)行及換熱機(jī)理進(jìn)行分析研究。通過對邊界條件及設(shè)計(jì)工況進(jìn)行理想型的假設(shè),計(jì)算出干工況條件下的數(shù)學(xué)模型。確定了建立好的數(shù)學(xué)模型的邊界條件以及控制方程,最后通過理論分析計(jì)算得到干工況條件下的解。 第二,通過上述得出的結(jié)論分別求出干工況及濕工況的傳熱、傳質(zhì)系數(shù),根據(jù)設(shè)計(jì)根據(jù)經(jīng)驗(yàn)依據(jù)選擇的翅片管的最佳尺寸,并計(jì)算出冷卻器的具體長、寬、高,整體做出詳細(xì)設(shè)計(jì),并且對選出的冷卻器核心換熱翅片管進(jìn)行溫度場的模擬分析判斷所選的翅片管尺寸是否為適合該工況的最優(yōu)結(jié)構(gòu)。 第三,分析空冷與噴淋兩用冷卻器在兩種工況下的各結(jié)構(gòu)參數(shù)以及運(yùn)行參數(shù)對冷卻性能的影響規(guī)律。論文中所涉及冷卻器性能造成的影響是否對在冷卻器結(jié)構(gòu)的參數(shù)包括：換熱器的基管管材、布置方式、翅片管間距、高度、厚度。所涉及的運(yùn)行方面進(jìn)行分析的參數(shù)包括：干、球溫度、污垢熱阻、迎風(fēng)面風(fēng)速、噴淋水量。 最后對本論文對空冷與噴淋兩用冷卻器性能分析結(jié)構(gòu)優(yōu)化設(shè)計(jì)中所做的研究設(shè)計(jì)得到的結(jié)論進(jìn)行總結(jié),并提出了還需要繼續(xù)優(yōu)化的方向,而且對空冷與噴淋兩用冷卻器未來可能的發(fā)展方向進(jìn)行了展望。
[Abstract]:Air cooling and spray cooler is a kind of energy saving equipment which can meet the refrigeration requirements well, and has the characteristics of environmental protection, low investment and operation cost, in the chemical industry, Textile and other industries have been widely used. In this paper, a mathematical model is established for the application of air-cooled and sprayed dual-purpose coolers in the western region, the structural design and optimization, numerical simulation research, This paper analyzes the influence of air cooling and spray cooling parameters on cooling performance under dry and wet conditions, and provides the selection basis for the design of new type coolers in practical engineering. The specific contents are as follows:. First, the operation and heat transfer mechanism of air-cooled and sprayed dual-purpose coolers under dry working conditions are analyzed and studied. The boundary conditions and design conditions are assumed to be ideal. The mathematical model under dry working condition is calculated and the boundary condition and control equation of the established mathematical model are determined. Finally, the solution under dry working condition is obtained by theoretical analysis and calculation. Secondly, the heat and mass transfer coefficients of dry and wet working conditions are calculated, the optimum size of finned tube selected according to the design, and the specific length, width and height of the cooler are calculated. The whole design is made in detail, and the temperature field of the selected finned tube is simulated to determine whether the size of the finned tube is the optimal structure suitable for the working condition. Third, The structure parameters of air-cooled and sprayed dual purpose coolers under two working conditions and the influence of operation parameters on cooling performance are analyzed. Whether the influence of the performance of the cooler on the parameters package of the cooler structure is discussed in this paper. Including: base tube tubes of heat exchangers, Layout, finned tube spacing, height, thickness. The operational parameters involved include: dry, ball temperature, fouling thermal resistance, windward wind speed, spray water. Finally, the conclusion of the research and design in the performance analysis of air-cooled and sprayed dual-purpose coolers is summarized, and the direction of optimization is put forward. The possible development direction of air-cooling and spray-cooled dual-purpose cooler in the future is also prospected.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB657

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本文編號：1499683