本文選題：瞬變平面熱源法 + THF水合物��； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：近年來,伴隨著能源危機(jī)的加重,使得天然氣水合物的開發(fā)和利用成為了水合物界研究的重點(diǎn)。天然氣水合物作為一種清潔的潛在能源,實(shí)現(xiàn)商業(yè)化開采,一定會(huì)對(duì)未來的能源結(jié)構(gòu)產(chǎn)生巨大的影響。我國(guó)學(xué)者通過不斷地探索和研究,已經(jīng)證實(shí)我國(guó)的天然氣水合物資源儲(chǔ)量十分豐富,開發(fā)利用其資源對(duì)我國(guó)的可持續(xù)發(fā)展戰(zhàn)略至關(guān)重要。水合物儲(chǔ)層對(duì)溫度的變化非常敏感,開采過程中很容易造成海底滑坡等地質(zhì)災(zāi)害,因此掌握天然氣水合物的基本熱物性參數(shù)具有重要的意義。為了研究水合物以及含水合物沉積物的熱物性,實(shí)驗(yàn)設(shè)計(jì)了一套小裝置以完成實(shí)驗(yàn)?zāi)繕?biāo);實(shí)驗(yàn)以THF水合物作為研究對(duì)象,通過瞬變平面熱源法測(cè)量了干燥石英砂、飽含水的石英砂、飽含冰的不同粒徑的石英砂、飽含THF水合物的不同粒徑的石英砂、飽含冰或者THF水合物的天然海沙等體系的熱物性,主要研究樣品的制備方法、熱物性測(cè)量方法以及含水合物沉積物的熱物性質(zhì)。通過實(shí)驗(yàn)研究,得出結(jié)論:壓力或者水合物生成后壓縮與否對(duì)THF水合物的導(dǎo)熱系數(shù)值、熱擴(kuò)散系數(shù)值和比熱容值的影響不大,并且THF水合物的比熱容值接近于冰的比熱容。常壓下生成的THF水合物的導(dǎo)熱系數(shù)在溫度為250.15～268.15K間時(shí)隨溫度的升高而升高,并且符合線性規(guī)律;在溫度為268.15～277.55K之間時(shí),其導(dǎo)熱系數(shù)值雖然仍然是隨溫度升高而升高,但是并不符合線性規(guī)律。石英砂的粒徑越小,含冰的石英砂的導(dǎo)熱系數(shù)、熱擴(kuò)散系數(shù)和比熱容越大,導(dǎo)熱系數(shù)和熱擴(kuò)散系數(shù)值隨溫度的升高而下降,比熱容隨溫度的升高而升高。石英砂的粒徑越小,含THF水合物的石英砂的導(dǎo)熱系數(shù)越大,其導(dǎo)熱系數(shù)的溫度依賴性與石英砂的粒徑和多孔介質(zhì)的孔隙度有很大的關(guān)系,熱擴(kuò)散系數(shù)隨溫度升高而降低,比熱容隨溫度升高而升高。含THF水合物天然海沙的導(dǎo)熱系數(shù)和比熱容表現(xiàn)出隨溫度升高而升高的玻璃體特征,熱擴(kuò)散系數(shù)隨溫度的升高而降低。
[Abstract]:In recent years, with the aggravation of energy crisis, the development and utilization of natural gas hydrate has become the focus of hydrate research. As a kind of clean potential energy, gas hydrate will have a great impact on the energy structure in the future. Through continuous exploration and research, Chinese scholars have proved that the natural gas hydrate reserves are very rich in China, and the development and utilization of natural gas hydrate resources is of great importance to the sustainable development strategy of our country. The hydrate reservoir is very sensitive to the change of temperature, and it is easy to cause geological disasters such as submarine landslide during exploitation. Therefore, it is of great significance to master the basic thermal physical parameters of natural gas hydrate. In order to study the thermal properties of hydrates and sediments containing hydrates, a small device was designed to accomplish the experimental goal, and the dry quartz sand was measured by transient plane heat source method with THF hydrate as the research object. The thermal properties of quartz sand full of water, quartz sand with different sizes of ice, quartz sand with different particle sizes of THF hydrate, natural sea sand full of ice or THF hydrate, etc., were studied in this paper. Methods of measuring thermal properties and thermal properties of hydrate-containing sediments. Through experimental study, it is concluded that pressure or compression after hydrate formation has little effect on the thermal conductivity, thermal diffusion coefficient and specific heat capacity of THF hydrate, and the specific heat capacity of THF hydrate is close to that of Yu Bing. The thermal conductivity of the THF hydrate formed at atmospheric pressure increases with the increase of temperature at 250.15268.15K, and the thermal conductivity increases with the increase of temperature when the temperature is between 268.15K and 277.55K. But it does not conform to the linear law. The smaller the grain size of quartz sand, the greater the thermal conductivity, thermal diffusion coefficient and specific heat capacity of the quartz sand containing ice. The thermal conductivity and thermal diffusion coefficient value decrease with the increase of temperature, and the specific heat capacity increases with the increase of temperature. The smaller the particle size of quartz sand, the greater the thermal conductivity of quartz sand containing THF hydrate. The temperature dependence of thermal conductivity is related to the particle size of quartz sand and the porosity of porous media, and the thermal diffusion coefficient decreases with the increase of temperature. The specific heat capacity increases with the increase of temperature. The thermal conductivity and specific heat capacity of natural marine sand containing THF hydrate show the characteristics of vitreous body with the increase of temperature, and the thermal diffusion coefficient decreases with the increase of temperature.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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