本文選題：地下水源熱泵 + 非飽和帶�。� 參考：《沈陽(yáng)建筑大學(xué)》2013年碩士論文

【摘要】：地下水源熱泵系統(tǒng)是一種利用淺層地能的既可供熱又可制冷的高效節(jié)能空調(diào)系統(tǒng),在全球范圍內(nèi)應(yīng)用越來(lái)越廣泛。然由于熱泵技術(shù)的不成熟,造成地下水源熱泵工程在運(yùn)行過(guò)程中常造成回灌困難、“熱貫通”及環(huán)境污染等一系列問(wèn)題。地下水源熱泵回灌過(guò)程經(jīng)常在非飽和帶的滲透量較大且滲透效果良好,故準(zhǔn)確掌握地下水源熱泵工程運(yùn)行過(guò)程非飽和帶水位和溫度場(chǎng)的變化特性尤為重要。否則地下水源熱泵工程運(yùn)行時(shí)不僅會(huì)使熱泵工程運(yùn)行效率降低,能源造成浪費(fèi),對(duì)環(huán)境也會(huì)構(gòu)成一定危害。 為全面掌握非飽和帶在水源熱泵工程運(yùn)行中的導(dǎo)熱特性,提高地下水源熱泵工程運(yùn)行效率,本為以沈陽(yáng)城區(qū)為例,對(duì)不同巖性條件下的熱泵運(yùn)行導(dǎo)熱特性進(jìn)行研究。 首先,本文通過(guò)收集沈陽(yáng)城區(qū)今年水文地質(zhì)條件,確定不同地區(qū)巖性特征,確定不同區(qū)域砂土特性。根據(jù)砂土巖性特征,在沈陽(yáng)城區(qū)選取13個(gè)熱泵工程,收集熱泵工程場(chǎng)區(qū)在2011年不同時(shí)間段內(nèi)不同深度處的溫度值,對(duì)不同深度、不同時(shí)段的抽灌井水溫恢復(fù)幅度與速率進(jìn)行監(jiān)測(cè)和分析,研究地下水源熱泵工程采暖后場(chǎng)區(qū)地下水溫恢復(fù)特性。研究表明,地下水溫度隨地層埋深增加不斷升高,在25m-35m深度范圍內(nèi)地下水溫度處于穩(wěn)定,稱為恒溫帶。根據(jù)各監(jiān)測(cè)點(diǎn)溫度值建立沈陽(yáng)城區(qū)恒溫帶溫度分區(qū)圖,為試驗(yàn)取樣和建立模型提供條件和依據(jù)。 為研究砂土在回灌過(guò)程中的導(dǎo)熱特性,本文采用室內(nèi)試驗(yàn)的方法,分別測(cè)取不同巖性條件下砂土的導(dǎo)熱特性和機(jī)械彌散特性。 砂土導(dǎo)熱特性的研究,文章應(yīng)用熱探針?lè)?測(cè)取了不同含水率條件下砂土導(dǎo)熱系數(shù)。研究表明,熱導(dǎo)率值隨著含水率的增大而增大,在含水率h15%狀態(tài)下砂土導(dǎo)熱系數(shù)基本處于穩(wěn)定狀態(tài),故導(dǎo)熱系數(shù)在砂土非飽和狀態(tài)下對(duì)熱彌散度影響不大。 為測(cè)取不同回灌條件下熱彌散度變化特性,本文通過(guò)建立水平土柱模型,應(yīng)用一維非飽和砂土熱量運(yùn)移定解方程,室內(nèi)測(cè)取不同回灌溫度條件下粗砂、中砂和細(xì)砂熱彌散度并對(duì)其變化特性進(jìn)行分析研究。試驗(yàn)表明,同一回灌溫度條件下,中砂熱彌散度最大,粗砂次之,細(xì)砂最��；對(duì)于同一類型砂土,不同回灌水溫度條件下熱彌散度隨溫度升高呈上升趨勢(shì)；熱泵工程布井過(guò)程應(yīng)準(zhǔn)確掌握熱彌散度的變化特性,優(yōu)化布井提高熱泵效率。 其次,為驗(yàn)證本次試驗(yàn)的可行性和準(zhǔn)確性,本次選取鑫淼酒店和紅田美林居兩個(gè)熱泵工程兩個(gè)運(yùn)行熱泵工程,對(duì)熱泵工程監(jiān)測(cè)數(shù)值與試驗(yàn)數(shù)據(jù)條件下的模擬值進(jìn)行對(duì)比分析。經(jīng)分析試驗(yàn)數(shù)據(jù)條件下模擬數(shù)值與實(shí)際工程監(jiān)測(cè)值之間差值較小,表明本次試驗(yàn)數(shù)據(jù)誤差較小,試驗(yàn)數(shù)據(jù)準(zhǔn)確可靠。 最后,為提高本次使用的實(shí)用性,試驗(yàn)完成后選取沈陽(yáng)城區(qū)在建工程千緣商會(huì)大廈熱泵工程和樂(lè)天游樂(lè)場(chǎng)熱泵工程。通過(guò)沈陽(yáng)城區(qū)砂土巖性分區(qū)圖和地溫分區(qū)圖,選取相應(yīng)的熱彌散度試驗(yàn)數(shù)值,應(yīng)用軟件模擬兩個(gè)在建土程運(yùn)行過(guò)程中溫度場(chǎng)的變化特性,對(duì)實(shí)際工程的可行性和可靠性進(jìn)行分析論證,提出合理的布井方案。
[Abstract]:The underground water source heat pump system is a kind of high efficiency and energy saving air conditioning system, which can be used both for heating and refrigeration in shallow ground. It is widely used in the world. However, because of the immature heat pump technology, the underground water source heat pump engineering often causes a series of problems, such as recharge difficulties, "heat through" and environmental pollution. The permeability of underground water source heat pump is often large and has good penetration effect in the unsaturated zone. Therefore, it is very important to grasp the change characteristics of the water level and temperature field of the underground water source heat pump engineering. Otherwise, the operation efficiency of the heat pump project will not only reduce the efficiency of the heat pump, but the energy will cause the wave. Fee, to the environment can also constitute a certain hazard.
In order to master the heat conduction characteristics of the unsaturated zone in the operation of water source heat pump, and to improve the operating efficiency of the underground water source heat pump, this paper takes the urban area of Shenyang as an example to study the heat conduction characteristics of the heat pump under different lithologic conditions.
First, by collecting the hydrological and geological conditions of Shenyang city this year, this paper determines the characteristics of different regions and determines the characteristics of sandy soil in different regions. According to the characteristics of sand and soil, 13 heat pump projects are selected in the urban area of Shenyang to collect the temperature values at different depths of different time periods in different time periods of the heat pump field area in 2011, and to different depths and different periods. The water temperature recovery amplitude and rate of the pumping well are monitored and analyzed. The characteristics of the groundwater temperature recovery in the field area of the ground water source heat pump project are studied. The study shows that the groundwater temperature increases continuously with the ground depth, and the water temperature in the 25m-35m depth is stable, which is called the constant temperature zone. According to the temperature value of each monitoring point, Shenyang is established. The temperature zoning map of the urban constant temperature zone provides the conditions and basis for the test sampling and the establishment of the model.
In order to study the thermal conductivity of sand in the process of recharge, the thermal conductivity and mechanical dispersion characteristics of sand under different lithologic conditions were measured in this paper.
Research on thermal conductivity of sand soil, the thermal conductivity of sand under different water content has been measured by the thermal probe method. The study shows that the thermal conductivity increases with the increase of water content, and the thermal conductivity of sand is basically in the stable state under the condition of water content h15%, so the influence of the number of thermal conductivity on the thermal dispersion under the unsaturated state of sand is not. Big.
In order to measure the variation characteristics of the thermal dispersion under different recharge conditions, by establishing a horizontal soil column model and applying the heat transfer equation of one dimension unsaturated sand, the coarse sand, the heat dispersion of medium sand and fine sand under different recharge temperatures were measured and analyzed. The experiment showed that under the same recharge temperature condition, the thermal dispersion of sand and fine sand was analyzed. The heat dispersion of the medium sand is the largest, the coarse sand is the second and the fine sand is the smallest. For the same type of sand, the thermal dispersion of the heat heat pump should be increased with the temperature rising, and the heat pump project should accurately grasp the change characteristic of the heat mass and optimize the well heat pump efficiency.
Secondly, in order to verify the feasibility and accuracy of the test, two heat pump projects of two heat pump projects in Xin Miao Hotel and red field Merrill are selected, and the simulated values of the heat pump engineering monitoring values and the experimental data are compared and analyzed. The difference between the simulated value and the actual project monitoring value under the condition of the analysis test data is analyzed. It shows that the error of the test data is small, and the test data is accurate and reliable.
At last, in order to improve the practicability of this use, the heat pump project of Shenyang urban area, the heat pump project of Qian Yuan chamber of Commerce building and the music field heat pump project are selected. The corresponding thermal dispersion test values are selected through the zoning map of sand soil lithology and the ground temperature zoning map of Shenyang City, and the application software is used to simulate the temperature of two processes during the running process of the soil construction process. The feasibility and reliability of the actual project are analyzed and demonstrated, and a reasonable well pattern is put forward.

【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU83

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