本文關(guān)鍵詞： L-CNG加氣站 系統(tǒng)配置 運行能耗 增壓系統(tǒng) NPSH 充裝系統(tǒng)　出處：《山東建筑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：L-CNG加氣站是以LNG為氣源,利用低溫高壓泵加壓至25MPa再經(jīng)氣化后向CNG車輛加氣。由于近年來進(jìn)口LNG逐漸體現(xiàn)出價格優(yōu)勢,加氣站運營企業(yè)紛紛投資新建L-CNG加氣站或是在原有LNG加氣站基礎(chǔ)上增設(shè)增壓氣化設(shè)施。L-CNG加氣站在我國發(fā)展起步較晚,相關(guān)的研究并不完善。在L-CNG加氣站運營中經(jīng)常出現(xiàn)實際運行能耗往往高于預(yù)期能耗;選取的設(shè)備與加氣能力不匹配造成的資源浪費或超負(fù)荷運行;以及L-CNG加氣站內(nèi)增壓系統(tǒng)工藝設(shè)計不合理而導(dǎo)致的低溫高壓泵回氣不暢、汽蝕、空車等現(xiàn)象。所以,對L-CNG加氣站運行能耗以及系統(tǒng)配置進(jìn)行系統(tǒng)分析,對站內(nèi)工藝系統(tǒng)優(yōu)化進(jìn)行深入研究能夠為L-CNG加氣站的設(shè)計以及運行提供理論及技術(shù)支持,有利于加氣站企業(yè)的節(jié)能運營。本文以L-CNG加氣站系統(tǒng)配置和運行能耗為研究對象,闡述加氣站的系統(tǒng)配置以及相關(guān)工藝;分析加氣站運行過程中的能源消耗分布;研究加氣站最大能耗單元增壓系統(tǒng)的吸入性能;模擬加氣站的充裝過程以及供氣模式。其具體工作如下:1.闡述L-CNG加氣站內(nèi)的系統(tǒng)配置及其相關(guān)工藝,并通過調(diào)研加氣站的加氣數(shù)據(jù),得到加氣站用氣規(guī)律和加氣時不均勻系數(shù),在此基礎(chǔ)下對站內(nèi)的關(guān)鍵設(shè)備(LNG儲罐、低溫高壓泵、高壓氣化器、CNG儲氣裝置等)在不同用氣量、不同建站條件下提出相應(yīng)的選型方法。2.分析L-CNG加氣站內(nèi)運行過程中產(chǎn)生的能源消耗,界定加氣站運行過程的能耗評價范圍,選取產(chǎn)品單位產(chǎn)量綜合能耗法為分析依據(jù),將L-CNG加氣站內(nèi)各類能耗數(shù)量折算為標(biāo)準(zhǔn)煤進(jìn)行比較和分析,得到運行過程中的能耗分布、各工藝的能源消耗方式及特點,并確定其主要能耗環(huán)節(jié)即站內(nèi)增壓系統(tǒng)。3.研究L-CNG加氣站增壓系統(tǒng)的吸入性能,利用不穩(wěn)定流動伯努利方程理論分析低溫高壓泵正常吸入時的必要條件;利用更符合實際情況的低溫高壓泵NPSH(凈正吸入壓頭)來闡釋低溫高壓泵正常工作時所要滿足的要求;并基于MATLAB軟件對影響加氣站增壓系統(tǒng)NPSHa的各因素進(jìn)行計算分析;基于MATLAB GUI實現(xiàn)增壓系統(tǒng)NPSHa值分析平臺的GUI設(shè)計,并模擬加氣站增壓系統(tǒng)的運行參數(shù)利用分析平臺對增壓系統(tǒng)進(jìn)行評估,最后結(jié)合上述理論研究與分析對實際站點增壓系統(tǒng)提出相應(yīng)的改進(jìn)思路。4.模擬L-CNG加氣站的充裝過程和供氣模式,利用CNG車輛加氣過程數(shù)學(xué)模型對儲氣瓶組車輛加氣過程進(jìn)行了模擬,得到氣體利用率最大的儲氣瓶組高、中、低壓配比,以及切換壓差;通過對儲氣瓶組單一供氣和儲氣瓶組和低溫高壓泵聯(lián)合供氣兩種不同供氣模式的工作時序的計算,分析出在L-CNG加氣站特殊工藝前提下儲氣瓶組和低溫高壓泵聯(lián)合供氣是最優(yōu)供氣模式。
[Abstract]:The L-CNG filling station uses LNG as the gas source, uses low temperature and high pressure pump to pressurize to 25MPa and then vaporizes to CNG vehicle. Because in recent years the imported LNG gradually reflects the price advantage. Gas station operators have invested in the construction of new L-CNG gas filling stations or the addition of pressurized gasification facilities on the basis of the original LNG filling stations. The development of L-CNG gas filling stations has started relatively late in China. The related research is not perfect. In the operation of L-CNG gas station, the actual energy consumption is often higher than the expected energy consumption, and the selected equipment is not matched with the gas filling capacity, which results in the waste of resources or overload operation. And the phenomena of low temperature and high pressure pump backflow, cavitation and empty car caused by unreasonable process design of charging system in L-CNG filling station. Therefore, the energy consumption and system configuration of L-CNG filling station are analyzed systematically. The deep research on the optimization of the in-station process system can provide theoretical and technical support for the design and operation of L-CNG gas filling station, and be beneficial to the energy saving operation of the gas filling station enterprise. This paper takes the system configuration and operation energy consumption of the L-CNG gas station as the research object. The system configuration and related technology of the gas station are described, the distribution of energy consumption during the operation of the station is analyzed, and the suction performance of the booster system of the maximum energy consumption unit of the gas station is studied. Simulation of filling process and gas supply mode of filling station. The specific work is as follows: 1. The system configuration and related technology in L-CNG filling station are expounded, and by investigating the filling data of gas station, the gas law and uneven coefficient of gas filling station are obtained. On this basis, for the key equipment in the station, such as LNG storage tank, low temperature and high pressure pump, high pressure gasifier CNG gas storage unit, etc. 2. The energy consumption generated in the operation of L-CNG gas station is analyzed, the energy consumption evaluation range of the operation process of the gas station is defined, and the comprehensive energy consumption method of product unit output is selected as the basis for the analysis. The energy consumption distribution in the operation process, the energy consumption mode and the characteristics of each process are obtained by comparing and analyzing the amount of energy consumed in L-CNG gas station converted into standard coal. And determine its main energy consumption link, I. e., the in-station booster system .3.Study on the suction performance of the L-CNG charging system, and analyze the necessary conditions for the normal suction of the low-temperature high-pressure pump by using the unsteady flow Bernoulli equation theory. Using NPSHs (net positive suction head), which is more suitable to the actual situation, to explain the requirements of the cryogenic high pressure pump in normal operation, and to calculate and analyze the factors that affect the NPSHa of charging system of gas station based on MATLAB software. Based on MATLAB GUI, the GUI design of the NPSHa value analysis platform of the supercharging system is realized, and the operation parameters of the turbocharging system are simulated to evaluate the supercharging system by using the analysis platform. Finally, based on the above theoretical research and analysis, the author puts forward the corresponding improvement ideas for the actual station pressurization system. 4. Simulating the filling process and the gas supply mode of the L-CNG filling station. By using the mathematical model of CNG vehicle filling process, the gas filling process of gas cylinder group was simulated, and the high, medium and low pressure ratio and the switching pressure difference of gas cylinder group with the largest gas utilization ratio were obtained. Based on the calculation of the working time of two different gas supply modes, the single gas supply and the gas storage cylinder combined with the low temperature and high pressure pump, the working time series of the single gas supply and the gas storage cylinder combined with the low temperature and high pressure pump are calculated. On the premise of special technology of L-CNG gas filling station, the optimal gas supply mode is the combination of gas tank set and low temperature and high pressure pump.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE974

【相似文獻(xiàn)】

相關(guān)期刊論文 前4條

1 蔣藝;黃坤;李欣;賀煥婷;王怡佳;沈坤蓉;;基于模糊綜合法的L-CNG加氣站風(fēng)險評價研究[J];石油與天然氣化工;2014年02期

2 羅東曉;林越玲;;L-CNG加氣站的推廣應(yīng)用前景[J];天然氣工業(yè);2007年04期

3 賀紅明;林文勝;顧安忠;;L-CNG加氣站技術(shù)淺析[J];天然氣工業(yè);2007年04期

4 田瑞華;;廣西L-CNG加氣站建設(shè)投營過程問題探討與對策[J];化工技術(shù)與開發(fā);2014年01期

相關(guān)重要報紙文章 前1條

1 記者 李文 通訊員 阮偉民;上海首座L-CNG加氣站正式投運[N];中國石油報;2013年

相關(guān)碩士學(xué)位論文 前3條

1 陳喜鳳;泉州市東海L-CNG加氣站項目運行安全風(fēng)險評價研究[D];華僑大學(xué);2015年

2 張欣豪;L-CNG加氣站系統(tǒng)配置與運行能耗研究[D];山東建筑大學(xué);2017年

3 李欣;L-CNG加氣站安全評價體系研究[D];西南石油大學(xué);2014年

，

本文編號：1532268