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A novel lignite-fired power plant integrated with a vacuum dryer: System design and thermodynamic analysis

Liu, Ming; Wu, Dongyin; Xiao, Feng; Yan, JunJie - In: Energy 82 (2015) C, pp. 968-975

Pre-drying of lignite before feeding to the boiler is a potential way to increase the net efficiency of lignite-fired power plants. Lignite pre-drying is, however, a high energy consumption process with a high risk of spontaneous ignition. If the lignite is dried at low temperature, the...

Persistent link: https://www.econbiz.de/10011209525

Thermodynamic and kinetic evaluation of the reaction between NO (nitric oxide) and char(N) (char bound nitrogen) in coal combustion

Zhang, Hai; Liu, Jiaxun; Shen, Jun; Jiang, Xiumin - In: Energy 82 (2015) C, pp. 312-321

thermodynamics and kinetics of the heterogeneous interaction between NO (nitric oxide) and char(N) (char bound nitrogen) during coal …

Persistent link: https://www.econbiz.de/10011209583

Energy, exergy, and Second Law performance criteria

Lior, Noam; Zhang, Na - In: Energy 32 (2007) 4, pp. 281-296

Performance criteria, such as efficiencies and coefficients of performance, for energy systems, are commonly used but often without sufficient understanding and consistence. The situation becomes particularly incoherent when simultaneous energy interactions of different types, such as work,...

Persistent link: https://www.econbiz.de/10010807607

The thermodynamics of direct air capture of carbon dioxide

Lackner, Klaus S. - In: Energy 50 (2013) C, pp. 38-46

the thermodynamically-required energy can be as small as $1 to $2 per metric ton of carbon dioxide. Thermodynamics does …

Persistent link: https://www.econbiz.de/10010807989

Teaching elementary thermodynamics and energy conversion: Opinions

Gaggioli, Richard A. - In: Energy 35 (2010) 2, pp. 1047-1056

This presentation deals with innovation in teaching and understanding of thermodynamic principles. Key features of the approach being advocated are: (a) postulation of the existence of entropy, (b) explicitly associating energy transfers with other transports, (c) stating the 2nd Law in terms of...

Persistent link: https://www.econbiz.de/10010808343

The thermodynamic basis of entransy and entransy dissipation

Xu, Mingtian - In: Energy 36 (2011) 7, pp. 4272-4277

shown that the entransy is a state variable and can be employed to describe the second law of thermodynamics. For heat … conduction, a principle of minimum entransy dissipation is established based on the second law of thermodynamics in terms of … thermodynamics, which paves the way for applications of the entransy dissipation theory in heat exchanger design. …

Persistent link: https://www.econbiz.de/10010808543

A theoretical global optimization method for vapor-compression refrigeration systems based on entransy theory

Xu, Yun-Chao; Chen, Qun - In: Energy 60 (2013) C, pp. 464-473

The vapor-compression refrigeration systems have been one of the essential energy conversion systems for humankind and exhausting huge amounts of energy nowadays. Surrounding the energy efficiency promotion of the systems, there are lots of effectual optimization methods but mainly relied on...

Persistent link: https://www.econbiz.de/10010808653

Thermodynamic analysis of algal biocrude production

Beal, C.M.; Hebner, R.E.; Webber, M.E. - In: Energy 44 (2012) 1, pp. 925-943

Although algal biofuels possess great potential, profitable production is quite challenging. Much of this challenge is rooted in the thermodynamic constraints associated with producing fuels with high energy, low entropy, and high exergy from dispersed materials. In this study, a preliminary...

Persistent link: https://www.econbiz.de/10010808664

Thermodynamic analysis and experimental study of solid/gas reactor operating in open mode

Marias, Foivos; Neveu, Pierre; Tanguy, Gwennyn; … - In: Energy 66 (2014) C, pp. 757-765

Thermochemical storage with moist air is a promising way to achieve seasonal storage of solar heat. This paper investigates the link between outlet and inlet airflow conditions in the case of hydration/dehydration of thermochemical processes operating with moist air at atmospheric pressure. A...

Persistent link: https://www.econbiz.de/10010810644

Thermodynamic assessment of a wind turbine based combined cycle

Rabbani, M.; Dincer, I.; Naterer, G.F. - In: Energy 44 (2012) 1, pp. 321-328

Combined cycles use the exhaust gases released from a Gas Turbine (GT). Approximately 30–40% of the turbine shaft work is typically used to drive the Compressor. The present study analyzes a system that couples a Wind Turbine (WT) with a combined cycle. It demonstrates how a WT can be used to...

Persistent link: https://www.econbiz.de/10010811302