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Optimized Operation of a Solar-Driven Thermoelectric Dehumidification System for Fresh water production

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Journal of Energy and Power Engineering 2012年第6期6卷 878-891页

作者： Muhyiddine Jradi Nesreen Ghaddar Kamel Ghali Department of Mechanical Engineering American University of Beirut Beirut 1107-2020 Lebanon

The work presents a parametric analysis of the performance of a solar-driven thermoelectric system to dehumidify air and produce fresh water. The system is combined with a solar distiller humidifying ambient air to enhance distillate output to meet the specified fresh water needs for a residential application. The presented system is a totally renewable energy-based system taking advantage of the clean solar energy. A model is developed to simulate the air dehumidification process using TEC （thermoelectrically cooled） channels. An optimization problem for setting system operational parameters is formulated to meet the fresh water requirement of 10 liters per day for a typical residential application in the Lebanese coastal humid climate. Using five TEC channels of length of 1.2 m and area of 0.07 - 0.05 m^2 integrated with 1.2 m^2 solar distiller is capable of meeting the water demand, where the air mass flow rate introduced to each TEC channel is optimally set at 0.0155 kg/s. The optimal electrical current input to the TEC modules from the photovoltaic solar panels varied depending on the month and is set at 2.2 A in June, 2.1 A in July and 2.0 A in August, September and October per each TEC module.

关键词： Thermoelectric cooling humidification/dehumidification process solar energy water production design and optimization.

Simulation of low and high salinity water injection method to determine the optimum salinity

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Petroleum Research 2019年第4期4卷 348-353页

作者： Seyed Mohammad Mehdi Nassabeh Afshin Davarpanah Joata Bayrami Department of Petroleum Engineering Faculty of Engineering and TechnologyOmidiyeh BranchIslamic Azad UniversityOmidiyehIran Department of Petroleum Engineering Science and Research BranchIslamic Azad UniversityTehranIran

Investigating the enhanced oil recovery leads to optimal production,protection and reduction of lateral *** salinity water injection(LSWI)is one of the significantly improved oil recovery(IOR)techniques for changing the amount of wettability in the carbonate fractured *** utilization of this methodology in terms of high efficiency in displacing light crude oils to the medium-gravity crude oils,water sources availability and its sustainability for pushing the oil which leads to appropriate economic occasions,are being compared with other IOR/EOR *** this study,the best injection modelling pattern is based on the highest rate of recovery *** of“high and low salinity water injection method”with“pure water injection method”is performed in an oil ***,analyzing the sensitivity on the high and low salinity according to the moderately low recovery factor of high and low salinity among the injection scenarios illustrates the low sensitivity of this parameter on a fractured carbonate *** reviewing different scenarios,it could be demonstrated that if the water injection could be applied to the reservoir from the preliminary times of production,the recovery factor rate would be ***,higher appropriate efficiency and better supplement have *** water injection has a high recovery factor than salty water *** the way,these two methods have little differences in calculating recovery ***,this parameter is significantly depended on wellhead equipment properties,safety factor and economic issues(water production).

关键词： Low salinity water injection Enhance oil recovery Injection scenarios Oil recovery factor water production

Experimental investigation of hydrate formation in water-dominated pipeline and its influential factors

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China Geology 2022年第2期5卷 310-321页

作者： Li Huang Jia-le Kang Xiao-dong Shen Jian-ye Sun Qing-guo Meng Qiang Chen Gao-wei Hu Chang-ling Liu Neng-you Wu Key Laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyChina Geological SurveyMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and TechnologyQingdao 266071China College of Marine Science and Technology China University of GeosciencesWuhan 430074China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China

Blockage in water-dominated flow pipelines due to hydrate reformation has been suggested as a potential safety issue during the hydrate *** this work,flow velocity-dependent hydrate formation features are investigated in a fluid circulation system with a total length of 39 m.A 9-m section pipe is transparent consisted of two complete rectangular *** means of pressurization with gas-saturated water,the system can gradually reach the equilibrium *** result shows that the hydrates are delayed to appear as floccules or thin films covering the methane *** the circulation velocity is below 750 rpm,hydrate is finally deposited as a“hydrate bed”at upmost of inner wall,narrowing the flow channel of the ***,no plugging is observed during all the experimental *** five stages of hydrate deposition are proposed based on the experimental *** is also revealed that a higher driving pressure is needed at a lower flow *** driving force of hydrate formation from gas and water obtained by melting hydrate is higher than that from fresh water with no previous hydrate *** authors hope that this work will be beneficial for the flow assurance of the following oceanic field hydrate recovery trials.

关键词： Pipeline water production Circulation Gas hydrate Formation morphology Gas concentration Flowrate NGHs exploration trial engineering Oil and gas exploration engineering Shenhu Area South China Sea

Drainage feature about coalbed methane wells in different hydrogeological conditions in Fanzhuang area

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Journal of Coal Science & Engineering(China) 2012年第4期18卷 344-349页

作者： NI Xiao-ming LIN Ran WANG Yan-bin School of Energy Science and Engineering Henan Polytechnic UniversityJiaozuo 454000China State Key Laboratory Cultivation Base for Gas Geology and Gas Control Henan Polytechnic UniversityJiaozuo 454000China College of Geo-science and Surveying Engineering China University of Mining&TechnologyBeijing 100083China

It is an important guarantee to enhance the production of coalbed methane （CBM） and reduce the project invest- ment by finding out the drainage feature about CBM wells in different hydrogeological conditions. Based on the CBM explora- tion and development data on the Fanzhuang block in southeast Qinshui Basin and combined with the seepage principle and lithology on the roof and the bottom coalbed, the mathematical model of integrated permeability was established. By perme- ability experiments of the different lithologies on the roof and the floor within the 20 m range combined with the log curves, the integrated permeability of different lithological combinations were obtained. The starting pressure gradient and permeabi- lity of the roof and the floor for different lithologies was tested by ＂differential pressure-flow method＂. The relationships be- tween the starting pressure gradient and the integrated permeability were obtained. The critical distance of limestone water penetrating into coal reservoirs was calculated. According to the drainage feature of CBM wells combined with the drainage data of some CBM wells, the results show that, when limestone water can penetrate into coal reservoirs, the daily water production is high and the daily gas production is low although there is no gas at the beginning of the drainage process, the CBM wells stop discharging water within 6 months after the gas began to come out, and the gas production is steadily improved. When limestone water can not penetrate into coal reservoirs, the daily water production is low and the daily gas production is high at the beginning of the drainage process, and it almost stops discharging water after some time when the gas come out, the daily gas production increases, and the cumulative water production is much lower.

关键词： coalbed methane hydrogeologicalv condition drainage feature water production Fanzhuang area