【摘要】：以管內(nèi)介質(zhì)有相變的翅片管空氣冷卻器為研究對(duì)象,采用量綱分析、泛函分析等方法,構(gòu)建了一個(gè)合理的翅片管空氣冷卻器傳熱系數(shù)關(guān)聯(lián)式。以氨泵供液型空氣冷卻器為實(shí)驗(yàn)研究對(duì)象,設(shè)計(jì)了結(jié)構(gòu)參數(shù)、迎面風(fēng)速、庫(kù)溫、驅(qū)動(dòng)溫差和供液倍率等多因素、多水平的實(shí)驗(yàn)方案,并采用校準(zhǔn)箱法測(cè)得不同測(cè)點(diǎn)下的傳熱系數(shù)。采用測(cè)試數(shù)據(jù)并以關(guān)聯(lián)式為目標(biāo)函數(shù),通過(guò)非線性擬合方法建立了適用于氨泵供液空氣冷卻器傳熱系數(shù)計(jì)算的關(guān)聯(lián)式。關(guān)聯(lián)式計(jì)算值與實(shí)測(cè)值相對(duì)誤差在±10%之間,且分項(xiàng)管內(nèi)換熱系數(shù)大于管外換熱系數(shù),符合空氣冷卻器換熱系數(shù)分布的一般規(guī)律,證明了傳熱關(guān)聯(lián)式是合理準(zhǔn)確的。在氨泵供液空氣冷卻器常用設(shè)計(jì)點(diǎn),關(guān)聯(lián)式計(jì)算值約為設(shè)計(jì)經(jīng)驗(yàn)值1.11~1.30倍,這表明采用關(guān)聯(lián)式設(shè)計(jì)該類(lèi)型空氣冷卻器可節(jié)約11%~30%的換熱面積,提高了經(jīng)濟(jì)效益。
[Abstract]:Taking finned tube air cooler with phase change in tube as the research object, a reasonable correlation formula of heat transfer coefficient of finned tube air cooler is constructed by means of dimensional analysis and functional analysis. Taking the ammonia pump liquid type air cooler as the experimental research object, a multi-factor and multi-level experimental scheme was designed, such as structure parameters, face wind speed, reservoir temperature, driving temperature difference and liquid supply ratio, etc. The heat transfer coefficient at different measuring points was measured by calibration box method. Using the test data and the correlation as the objective function, the correlation formula suitable for the calculation of the heat transfer coefficient of the ammonia pump air cooler is established by nonlinear fitting method. The relative error between the calculated value and the measured value of the correlation formula is 鹵10%, and the heat transfer coefficient in the partial tube is larger than the heat transfer coefficient outside the tube, which accords with the general law of the heat transfer coefficient distribution of the air cooler, and proves that the heat transfer correlation is reasonable and accurate. At the common design point of ammonia pump air cooler, the calculated value of the correlation formula is about 1.111.30 times that of the design experience, which indicates that the heat transfer area can be saved by 1130% and the economic benefit can be improved by adopting the correlation design method for this type of air cooler.
【作者單位】： 煙臺(tái)冰輪股份有限公司研發(fā)設(shè)計(jì)部;機(jī)械科學(xué)研究總院中機(jī)生產(chǎn)力促進(jìn)中心;
【分類(lèi)號(hào)】：TB657

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