發(fā)布時(shí)間：2018-02-21 09:41

  本文關(guān)鍵詞： 土壤源熱泵 水文地質(zhì) 淺層地溫 巖土熱物性 能耗 工程經(jīng)濟(jì)效益　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：建筑中的能源消耗占據(jù)我國(guó)能源總消耗的很大比例，而暖通空調(diào)又是建筑能耗中最大的因素。隨著資源緊缺和環(huán)境污染的問(wèn)題日益加劇，淺層地?zé)崮茉絹?lái)越受建筑設(shè)計(jì)人員和科研人員的高度關(guān)注。土壤源熱泵正是一種利用淺層地?zé)崮艿男滦透咝Э照{(diào)系統(tǒng)，在國(guó)家政策的鼓勵(lì)下，近年來(lái)得到快速發(fā)展。 由于土壤源熱泵系統(tǒng)綜合性能主要受地埋管淺層巖土換熱性能的影響，即受巖土熱物性參數(shù)的影響。因此本文提出依據(jù)巖土的熱物性來(lái)對(duì)土壤源熱泵進(jìn)行適宜區(qū)的劃分。 本文以西安市主城區(qū)及周邊為研究區(qū)域，結(jié)合地質(zhì)、水文地質(zhì)條件勘察數(shù)據(jù)，選取代表性點(diǎn)進(jìn)行巖土熱響應(yīng)試驗(yàn)，分析研究區(qū)域地下水位埋深和巖土熱物特性等因素對(duì)地埋管換熱性能及土壤源熱泵系統(tǒng)應(yīng)用的影響。以經(jīng)濟(jì)效益與社會(huì)效益的角度，通過(guò)與常規(guī)空調(diào)系統(tǒng)對(duì)比分析，，將西安市地區(qū)不同地貌單元淺層巖土熱物性參數(shù)對(duì)土壤源熱泵應(yīng)用的適宜性做出分析。 通過(guò)試驗(yàn)與分析得出以下結(jié)論：西安市主城區(qū)及周邊的潛水水位范圍為360m～550m（海拔值），沿東南至西北方向水位遞減。黃土塬地貌區(qū)域包氣帶厚度為30m～60m。其它區(qū)域包氣帶厚度基本為2m～30m。地下120m內(nèi)，巖土綜合導(dǎo)熱系數(shù)的范圍是1.551W/(m K）～2.0W/(m K），容積比熱容的范圍是2.255×106J/(m3℃）～2.709×106J/(m3℃）。研究區(qū)域恒溫層至地下120m內(nèi)巖土的平均溫度范圍是16℃～18℃。 通過(guò)年運(yùn)行能耗值計(jì)算比較及經(jīng)濟(jì)性比較，得出西安市主城區(qū)及周邊各個(gè)地貌單元中，土壤源熱泵空調(diào)系統(tǒng)比常規(guī)冷熱源空調(diào)系統(tǒng)的節(jié)能效果明顯，經(jīng)濟(jì)效益顯著。綜合社會(huì)效益和工程經(jīng)濟(jì)效益，對(duì)研究區(qū)域土壤源熱泵空調(diào)系統(tǒng)應(yīng)用的適宜性做分析，按照地貌單元對(duì)研究區(qū)域土壤源熱泵空調(diào)系統(tǒng)適宜性做出排序。 本課題的研究旨在對(duì)當(dāng)?shù)氐芈窆軣岜孟到y(tǒng)的開(kāi)發(fā)利用進(jìn)行適宜性評(píng)價(jià),為西安市主城區(qū)及周邊地源熱泵健康發(fā)展提供幫助。為土壤源熱泵系統(tǒng)的設(shè)計(jì)提供參考。
[Abstract]:Energy consumption in buildings accounts for a large proportion of the total energy consumption in China, and HVAC is the biggest factor in building energy consumption. Ground source heat pump (GSHP) is a new type of high efficient air conditioning system using shallow geothermal energy, which has been developed rapidly in recent years under the encouragement of national policies. Because the comprehensive performance of ground-source heat pump system is mainly affected by the heat transfer performance of shallow rock and soil of buried pipe, that is, by the parameters of geotechnical thermal property, this paper proposes to divide the suitable area of ground-source heat pump according to the thermophysical property of geotechnical. In this paper, taking the main urban area of Xi'an city and its surrounding area as the study area, combined with the geological and hydrogeological condition survey data, the representative points are selected to carry out the geotechnical thermal response test. This paper analyzes the influence of the factors such as the buried depth of regional groundwater level and the characteristics of geotechnical heat objects on the heat transfer performance of buried pipes and the application of ground-source heat pump system. From the point of view of economic and social benefits, it is compared with the conventional air conditioning system. The suitability of the thermal properties of shallow rock and soil in different geomorphologic units to the application of ground-source heat pump in Xi'an area was analyzed. Through test and analysis, the following conclusions are drawn: the range of diving water level in the main urban area of Xi'an city and its surrounding area is 360 m ~ 550 m (elevation value), which decreases along the southeast to northwest direction. The thickness of aeration zone in loess tableland is 30 m ~ 60 m. The thickness of the belt is about 2 m ~ 30 m. Within 120 m underground, The comprehensive thermal conductivity of rock and soil is 1.551 W / m ~ (-1) K ~ (-1) 2.0 W / m ~ (-1) K ~ (-1), and the range of volume specific heat capacity is 2.255 脳 10 ~ (6) J / m ~ (3) 鈩

本文編號(hào)：1521629