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Numerical simulation of gas production from hydrate deposits using a single vertical well by depressurization in the Qilian Mountain permafrost, Qinghai-Tibet Plateau, China

Zhao, Jiafei; Yu, Tao; Song, Yongchen; Liu, Di; Liu, Weiguo - In: Energy 52 (2013) C, pp. 308-319

a single vertical well by depressurization. The simulation results indicated that for a 1.5 MPa wellbore pressure, the … total gas hydrates in the simulated system. The results may suggest that the single vertical well by depressurization method …, such as a horizontal well design or the combination of depressurization and thermal stimulation, may be more economically …

Persistent link: https://www.econbiz.de/10011053548

A novel approach coupling neutron imaging and numerical modelling for the analysis of the impact of water on fuel cell performance

Iranzo, Alfredo; Boillat, Pierre; Oberholzer, Pierre; … - In: Energy 68 (2014) C, pp. 971-981

A novel modelling framework for the simulation of the diffusive mass transport limitations occurring at GDL local scale of PEFCs is presented, in particular in relation with the distribution of liquid water in the porous media. The distinctive characteristic of this framework is the fact that...

Persistent link: https://www.econbiz.de/10010807487

Numerical model and investigations of the externally heated valve Joule engine

Wojewoda, Jerzy; Kazimierski, Zbyszko - In: Energy 35 (2010) 5, pp. 2099-2108

The mineral fuels used recently, i.e., oil and gas, will be soon exploited out. This paper presents an idea of the engine where any fuel or solar heat can be used as a source of energy. The proposed model is an externally heated, 2-stroke, valve engine (EHVE). This is a piston-type engine,...

Persistent link: https://www.econbiz.de/10010808342

A three-dimensional transient model for EGS subsurface thermo-hydraulic process

Jiang, Fangming; Chen, Jiliang; Huang, Wenbo; Luo, Liang - In: Energy 72 (2014) C, pp. 300-310

Understanding the subsurface thermo-hydraulic process in enhanced or engineered geothermal systems (EGS) is crucial to the efficiency of heat extraction and the sustainable utilization of geothermal reservoir. We present in detail a three-dimensional transient model for the study of subsurface...

Persistent link: https://www.econbiz.de/10010808524

Analytical investigation and experimental validation of an inverted cup float used for wave energy conversion

Ramadan, A.; Mohamed, M.H.; Abdien, S.M.; Marzouk, S.Y.; … - In: Energy 70 (2014) C, pp. 539-546

World energy demand is increasing at an alarming rate and producing electricity from alternative or renewable energy sources is becoming necessary. There are many technologies to extract electric energy from sea waves such as: the oscillating water column, the point absorber, the overtopping...

Persistent link: https://www.econbiz.de/10010808619

Choosing the site for the first wave farm in a region: A case study in the Galician Southwest (Spain)

Iglesias, G.; Carballo, R. - In: Energy 36 (2011) 9, pp. 5525-5531

Where should the first wave farm in a region be installed? The nearshore area with the largest resource is the prime candidate. But how should this area be determined? Wave resource analyses typically consider a small number of wave patterns. Does the number of wave patterns influence the...

Persistent link: https://www.econbiz.de/10010810081

Thermal performance of flat plate solar collectors with sheet-and-tube and roll-bond absorbers

Del Col, Davide; Padovan, Andrea; Bortolato, Matteo; … - In: Energy 58 (2013) C, pp. 258-269

A prototype of glazed flat plate solar collector with roll-bond absorber is presented and its performance is experimentally characterized. Differently from common sheet-and-tube collectors, in the present prototype the channels for the liquid are integrated in the roll-bond absorber plate....

Persistent link: https://www.econbiz.de/10010811452

Wave energy potential along the Death Coast (Spain)

Iglesias, G.; Carballo, R. - In: Energy 34 (2009) 11, pp. 1963-1975

The newly available SIMAR-44 data set, covering a 44-year period, is used together with wave buoy data to assess the wave energy resource along the Death Coast, the craggy stretch from Cape Finisterre to the Sisarga Isles. Its location at the north-western corner of the Iberian Peninsula and its...

Persistent link: https://www.econbiz.de/10011053991

Numerical modelling and experimental measurements for a low-temperature district heating substation for instantaneous preparation of DHW with respect to service pipes

Brand, Marek; Thorsen, Jan Eric; Svendsen, Svend - In: Energy 41 (2012) 1, pp. 392-400

Traditional district heating (DH) systems are becoming uneconomic as the number of new and renovated buildings with reduced heating requirements increases. To keep DH competitive in the future, heat losses in DH networks need to be reduced. One option is to reduce the supply temperature of DH as...

Persistent link: https://www.econbiz.de/10011054876

A numerical model and comparative investigation of a thermoelectric generator with multi-irreversibilities

Meng, Fankai; Chen, Lingen; Sun, Fengrui - In: Energy 36 (2011) 5, pp. 3513-3522

Taking into account inner and external multi-irreversibilities, a complete numerical model of commercial thermoelectric generator with finned heat exchangers is established by combining thermodynamics with heat transfer theory. A significant novelty is that physical properties, geometric...

Persistent link: https://www.econbiz.de/10011055051