地源水分級供熱系統(tǒng)構(gòu)思與案例分析
發(fā)布時間：2018-05-06 22:27
本文選題：供熱 + 低溫?zé)崴?/strong>�。� 參考：《暖通空調(diào)》2016年12期
【摘要】：為充分利用地源水冬季溫度較高的特征以及室內(nèi)熱環(huán)境的非均勻性來提高能效,提出了地源水分級供熱系統(tǒng),即部分地源熱量直接用于加熱圍護結(jié)構(gòu)、減少室內(nèi)直接散熱量,部分地源熱量則通過熱泵提升品位后承擔(dān)剩余部分負(fù)荷。選取北京一幢典型玻璃幕墻建筑,以地埋管地源熱泵為例,構(gòu)建了傳熱數(shù)值計算模型和能耗計算方法,分析了該系統(tǒng)在整個供暖季的逐時性能。結(jié)果表明:分級供熱系統(tǒng)可以提高窗戶平均溫度2.3℃并降低16.8%的累計熱負(fù)荷和33.1%的尖峰熱負(fù)荷;由于地源水的直接利用無需機組能耗,該系統(tǒng)節(jié)能率達(dá)13.0%,初投資不變而運行費用有效降低。在室外溫度較低時,負(fù)荷降低效果將更顯著。此外,因該系統(tǒng)的末端應(yīng)用于窗戶,所以其適用于窗墻面積比較大的建筑。
[Abstract]:In order to make full use of the characteristics of high temperature in winter and the non-uniformity of indoor thermal environment to improve energy efficiency, this paper puts forward a classified heating system of ground source water, that is, part of ground source heat is directly used to heat the enclosure structure and to reduce the indoor direct heat loss. Part of the heat source heat through the heat pump to enhance the grade of the remaining part of the load. Taking a typical glass curtain wall building in Beijing as an example, a numerical heat transfer model and a method for calculating energy consumption are constructed, and the hourly performance of the system in the whole heating season is analyzed. The results show that the average temperature of windows can be increased by 2.3 鈩，
本文編號：1854191
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