【摘要】：閉式能源塔熱泵作為一種新型的熱泵形式,在空調(diào)領(lǐng)域已經(jīng)有一些應(yīng)用并在發(fā)展中不斷完善,該系統(tǒng)主要是利用了小溫差、寬翅片、無(wú)霜運(yùn)行等技術(shù)特點(diǎn),冬季運(yùn)行時(shí)閉式能源塔利用換熱器內(nèi)載流介質(zhì)與空氣進(jìn)行熱質(zhì)交換,完成低品位能源轉(zhuǎn)化為高品位能源,使能源得到充分利用。閉式能源塔在冬季工況下運(yùn)行時(shí),主要的換熱工具為翅片管換熱器,本文通過(guò)對(duì)株洲市某公共樓冬季工況下運(yùn)行的閉式能源塔進(jìn)行數(shù)據(jù)測(cè)量,根據(jù)所得參數(shù)對(duì)閉式能源塔進(jìn)行(火用)損失及(火用)效率計(jì)算,得出閉式能源塔內(nèi)翅片管換熱器的(火用)損失為9.46715KW,(火用)效率為56.49%。結(jié)合其他文獻(xiàn)數(shù)據(jù)比較分析得出:減少冷熱源溫差可以降低換熱器的(火用)損失,在閉式能源塔內(nèi)冷熱源的溫差控制在3℃~5℃左右可提高能源利用效率。本文利用FLUENT軟件對(duì)翅片管換熱器管外空氣流場(chǎng)的、溫度場(chǎng)、壓力場(chǎng)的分布進(jìn)行研究,得到的模擬數(shù)據(jù)與測(cè)量數(shù)據(jù)誤差為7.43%,證明數(shù)值模擬具有一定的可靠性。本文還對(duì)不同風(fēng)速、不同翅片間距、不同進(jìn)風(fēng)溫度等工況下翅片管外空氣流動(dòng)進(jìn)行研究,根據(jù)所得到的數(shù)據(jù)進(jìn)行擬合公式并與所得曲線(xiàn)圖進(jìn)行分析,得出風(fēng)速在4.5m/s,翅片間距為4mm及換熱在濕工況下進(jìn)行換熱效果較好。閉式能源塔內(nèi)換熱器的研究對(duì)于節(jié)約能源、降低能耗、提高換熱效率提供了有意義的方法及途徑。
[Abstract]:As a new type of heat pump, closed energy tower heat pump has been applied in the field of air conditioning and constantly improved in the development. The system mainly makes use of the technical characteristics of small temperature difference, wide finned, frost-free operation and so on. In winter operation, the closed energy tower uses the internal current-carrying medium of the heat exchanger to exchange heat and mass with air to complete the conversion of low-grade energy into high-grade energy, so that the energy can be fully utilized. When the closed energy tower runs in winter, the main heat exchange tool is the finned tube heat exchanger. In this paper, the data of the closed energy tower operating under the winter working condition of a public building in Zhuzhou City are measured. According to the obtained parameters, the exergy loss and exergy efficiency of the closed energy tower are calculated. The exergy loss of the finned tube heat exchanger in the closed energy tower is 9.46715kW, and the exergy efficiency is 56.49%. Combined with the comparative analysis of other literature data, it is concluded that reducing the temperature difference between cold and heat sources can reduce the exergy loss of heat exchanger, and the energy utilization efficiency can be improved by controlling the temperature difference between cold and heat sources in closed energy tower at about 3 鈩，

本文編號(hào)：2504099