本文選題：地源熱泵　切入點：動態(tài)負荷　出處：《南京理工大學》2013年碩士論文

【摘要】：夏熱冬冷地區(qū)的主要氣候特點為夏季炎熱,冬季寒冷,濕度大,因此該地區(qū)的建筑及其負荷特點不同于其他氣候區(qū)域。本文以AT值作為第一劃分參數(shù)對夏熱冬冷地區(qū)的建筑節(jié)能季節(jié)進行了劃分,用DEST軟件對夏熱冬冷地區(qū)的酒店、辦公、住宅類建筑進行了全年逐時能耗模擬,從負荷總量的累積效應、負荷強度的變化特性、負荷的持續(xù)性這三個角度描述了夏熱冬冷地區(qū)建筑的動態(tài)負荷特性。 本文將地源熱泵機組的進、出口水溫及建筑逐時負荷擬合成公式,通過編輯UDF程序控制FLUENT軟件模擬地源熱泵系統(tǒng)的運行,基于動態(tài)負荷對U型地埋管換熱器與當量直徑地埋管換熱器的傳熱模型進行了對比,得出：地源熱泵系統(tǒng)全年運行,不同地下水滲流條件下,在供冷期和供暖期,U型地埋管與當量直徑地埋管土壤平均溫度的最大偏差為0.4℃；供冷期,地埋管逐時出水溫度偏差的平均值為0.47℃,供暖期,地埋管逐時出水溫度偏差的平均值為0.53℃。 地埋管換熱器的換熱特性直接影響到地源熱泵機組的運行性能,本文建立了地埋管管群換熱器的實際傳熱模型,模擬了地下水流動對地源熱泵系統(tǒng)運行性能的影響,通過分析得出：滲流有利于地源熱泵系統(tǒng)的長期運行,當?shù)叵滤臐B流速度等于31.5m/a時,上海市酒店類建筑地源熱泵系統(tǒng)地埋管的年逐時出水溫度大致相同。 本文選取了南京、武漢、長沙、重慶作為夏熱冬冷地區(qū)的典型代表性城市,結(jié)合這四座城市不同功能建筑的負荷特性對地源熱泵在夏熱冬冷地區(qū)的長期運行性能進行了分析,得出了以下三點結(jié)論：負荷總量累積效應越明顯,土壤的溫度越高、蓄熱量越大；負荷的持續(xù)性越強,土壤溫度的分布越不均勻；負荷的強度變化越大,供冷期地埋管的最高出水溫度越高,供暖期地埋管的最低出水溫度越低。
[Abstract]:The main climatic characteristics of hot summer and cold winter are hot summer, cold winter and high humidity. Therefore, the characteristics of buildings and their loads in this area are different from other climatic regions.This paper uses AT value as the first division parameter to divide the energy saving seasons of buildings in hot summer and cold winter area, and simulates the hourly energy consumption of hotel, office and residential buildings in hot summer and cold winter area with DEST software.The dynamic load characteristics of buildings in hot summer and cold winter area are described from three aspects: cumulative effect of total load, variation of load intensity and continuity of load.In this paper, the inlet and outlet water temperature of ground-source heat pump unit and the quasi-composite formula of building hourly load are used to simulate the operation of ground-source heat pump system by editing UDF program to control the operation of ground-source heat pump system.Based on the dynamic load, the heat transfer models of U-type ground heat exchanger and equivalent diameter ground heat exchanger are compared. It is concluded that the ground source heat pump system runs all year round and under different groundwater seepage conditions.The maximum deviation of soil average temperature between U-type buried pipe and equivalent diameter buried pipe is 0.4 鈩，

本文編號：1708238