The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Qiang Li - One of the best experts on this subject based on the ideXlab platform.
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Vacuum lifetime and Residual Gas analysis of parabolic trough receiver
Renewable Energy, 2016Co-Authors: Jinmei Liu, Dongqiang Lei, Qiang LiAbstract:The vacuum characteristics and lifetime are the key problems of parabolic trough receiver. Heat loss of the receiver will greatly increase when the vacuum has been lost. Especially, if hydrogen is inside the annulus space of the receiver, heat loss at a level is approximately a factor of four higher than the loss for a receiver with good vacuum. Suitable vacuum levels and Residual Gases should be maintained in the receiver to ensure performances during its projected lifetime. In this paper, the variations of composition and partial pressure of Residual Gases with temperature in the receiver were measured by a high sensitivity quadrupole mass spectrometer Gas analyzer. The effects of Residual Gas and getter on the vacuum lifetime of receiver were analyzed. The results showed that hydrogen was the main Residual Gas in the annular space of receiver without getter, and the nitrogen was the main Gas released in the receiver with getter. It can be confirmed that the Residual Gas analysis was a very effective way to predict and evaluate the vacuum lifetime of the receiver.
Masanori Kiyota - One of the best experts on this subject based on the ideXlab platform.
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geological storage of carbon dioxide by Residual Gas and solubility trapping
International Journal of Greenhouse Gas Control, 2008Co-Authors: Tetsuya Suekane, Tomohisa Nobuso, Shuichiro Hirai, Masanori KiyotaAbstract:Abstract A CO 2 geological storage technology based on Residual Gas and solubility trapping is proposed. First, we experimentally evaluated the maximum trapped CO 2 saturation for typical conditions of aquifers at depths from 750 to 1000 m. To avoid the experimental difficulty due to the dissolution of CO 2 in water and the compressibility of CO 2 , the trapped Gas saturations were estimated from the relationship between pressure and volume under an isothermal expansion process. The trapped Gas saturation is in the range from 24.8 to 28.2% despite the variation of CO 2 density, viscosity and interfacial tension. Therefore, at least 38.8% of CO 2 would be stored by Residual Gas and solubility trapping per unit volume as compared to physical trapping with cap rock. The storage potential of Japan by the proposed scheme is evaluated to be 71.6 Gt CO 2 , which corresponds to the emission in Japan for 53.6 years. The storage by Residual Gas and solubility trapping not only augments the storage capacity but also provides the sites that are located close to the large emission sources.
Fangfang Yin - One of the best experts on this subject based on the ideXlab platform.
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a systematic study of the Residual Gas effect on vacuum solar receiver
Energy Conversion and Management, 2011Co-Authors: Jun Wang, Xinyan Huang, Guangjie Gong, Menglong Hao, Fangfang YinAbstract:A parabolic trough solar receiver is the key component in the parabolic trough solar system. The annulus between the absorber and glass envelope is evacuated to protect the solar selective coating and decrease the heat loss of entire receiver. However, at any existing operational solar plants, the vacuum condition in annulus may be compromised by glass breakage, seals and bellows broken, hydrogen penetration and getter decomposition. In this paper, different heat transfer mechanisms due to variable Residual Gas conditions in the annulus are analyzed. In addition, a series of heat loss tests of China’s first high temperature vacuum solar receiver are carried out by two methods with special exhaust system and vacuum gauges. The negative effects of Residual Gas, including environmental-sensitivity enhancement, coating degradation, and system efficiency decreasing, are acquired and analyzed with theoretical as well as test results.
Jinmei Liu - One of the best experts on this subject based on the ideXlab platform.
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Vacuum lifetime and Residual Gas analysis of parabolic trough receiver
Renewable Energy, 2016Co-Authors: Jinmei Liu, Dongqiang Lei, Qiang LiAbstract:The vacuum characteristics and lifetime are the key problems of parabolic trough receiver. Heat loss of the receiver will greatly increase when the vacuum has been lost. Especially, if hydrogen is inside the annulus space of the receiver, heat loss at a level is approximately a factor of four higher than the loss for a receiver with good vacuum. Suitable vacuum levels and Residual Gases should be maintained in the receiver to ensure performances during its projected lifetime. In this paper, the variations of composition and partial pressure of Residual Gases with temperature in the receiver were measured by a high sensitivity quadrupole mass spectrometer Gas analyzer. The effects of Residual Gas and getter on the vacuum lifetime of receiver were analyzed. The results showed that hydrogen was the main Residual Gas in the annular space of receiver without getter, and the nitrogen was the main Gas released in the receiver with getter. It can be confirmed that the Residual Gas analysis was a very effective way to predict and evaluate the vacuum lifetime of the receiver.
Colin Card - One of the best experts on this subject based on the ideXlab platform.
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risk mitigation through the optimization of Residual Gas and solubility trapping for co2 storage in saline aquifers
Energy Procedia, 2009Co-Authors: Long Nghiem, Chaodong Yang, Vijay Kumar Shrivastava, Bruce Frederick Kohse, Mohamed Shamshudin Hassam, Colin CardAbstract:Abstract The two most important trapping mechanisms in CO2 storage in saline aquifers, namely Residual Gas trapping and solubility trapping are examined. It is shown that a water injector located above the CO2 injector can be used to enhance both Residual Gas trapping and solubility trapping. Using simulation, the optimal location and operating conditions for the water injector are determined for both a low-permeability aquifer and a high-permeability aquifer. It is shown that low vertical permeability and water injection at a larger depth favor Residual Gas trapping while high vertical permeability and water injection at a smaller depth favor solubility trapping. It is also shown that for high-permeability aquifers, water injection does not increase the total CO2 trapping.
