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Failure pressure of a pressurized girth-welded super duplex stainless steel pipe in reverse osmosis desalination plants

Lee, Chin-Hyung; Chang, Kyong-Ho - In: Energy 61 (2013) C, pp. 565-574

the girth welding of the thin-walled super duplex stainless steel pipe and the failure pressure of the girth-welded super … stresses were then incorporated into the 3-D elastic-plastic FE analyses to explore the failure behavior of the girth … indicator of the failure pressure. The FE results have shown that the failure of the girth-welded thin-walled super duplex …

Persistent link: https://www.econbiz.de/10011055833

Identifying key variables and interactions in statistical models of building energy consumption using regularization

Hsu, David - In: Energy 83 (2015) C, pp. 144-155

Statistical models can only be as good as the data put into them. Data about energy consumption continues to grow, particularly its non-technical aspects, but these variables are often interpreted differently among disciplines, datasets, and contexts. Selecting key variables and interactions is...

Persistent link: https://www.econbiz.de/10011264361

Optimal electricity dispatch on isolated mini-grids using a demand response strategy for thermal storage backup with genetic algorithms

Neves, Diana; Silva, Carlos A. - In: Energy 82 (2015) C, pp. 436-445

The present study uses the DHW (domestic hot water) electric backup from solar thermal systems to optimize the total electricity dispatch of an isolated mini-grid. The proposed approach estimates the hourly DHW load, and proposes and simulates different DR (demand response) strategies, from the...

Persistent link: https://www.econbiz.de/10011209575

Forecasting semi-dynamic response of natural gas networks to nodal gas consumptions using genetic fuzzy systems

Askari, S.; Montazerin, N.; Zarandi, M.H. Fazel - In: Energy 83 (2015) C, pp. 252-266

Abstract-Semi-dynamic behavior of natural gas distribution network and nodal gas consumptions are predicted. Traditional Hardy-Cross method for analysis of the gas network is replaced with a direct mathematical solution of mass conservation equations at network nodes to yield nodal static...

Persistent link: https://www.econbiz.de/10011264391

Reactive power price clearing using multi-objective optimization

Reddy, S. Surender; Abhyankar, A.R.; Bijwe, P.R. - In: Energy 36 (2011) 5, pp. 3579-3589

This paper presents a new multi-objective optimization based reactive power price clearing (RPPC) mechanism, considering voltage stability. Use of realistic voltage dependent load models is important in power system analysis and optimization. The influence of the same on RPPC is investigated in...

Persistent link: https://www.econbiz.de/10010807265

Genetic algorithms and non-intrusive energy management system based economic dispatch for cogeneration units

Chang, Hsueh-Hsien - In: Energy 36 (2011) 1, pp. 181-190

By integrating neural networks (NNs) with turn-on transient energy analysis, this work attempts to recognize demand load, including the buyers’ load on the power systems and the internal load on the cogeneration systems, thereby increasing the recognition accuracy in a non-intrusive energy...

Persistent link: https://www.econbiz.de/10010807442

Development of future energy scenarios with intelligent algorithms: Case of hydro in Turkey

Cinar, Didem; Kayakutlu, Gulgun; Daim, Tugrul - In: Energy 35 (2010) 4, pp. 1724-1729

Energy production is considered as one of the key indicators for economic development. It is vital to improve the renewable energy production for global sustainability, while leveraging the national resources. This study is contributing to the demonstration of using genetic algorithms (GA) in...

Persistent link: https://www.econbiz.de/10010811273

Heat management for hydrogen production by high temperature steam electrolysis

Mansilla, Christine; Sigurvinsson, Jon; Bontemps, André; … - In: Energy 32 (2007) 4, pp. 423-430

Many research and development projects throughout the world are devoted to sustainable hydrogen production processes. Low-temperature electrolysis, when consuming electricity produced without greenhouse gas emissions, is a sustainable process, though having limited efficiency.

Persistent link: https://www.econbiz.de/10010811413

CO2-free power generation in combined cycles—Integration of post-combustion separation of carbon dioxide in the steam cycle

Möller, Björn Fredriksson; Assadi, Mohsen; Potts, Ian - In: Energy 31 (2006) 10, pp. 1520-1532

Ever since the release of the Kyoto protocol the demand for CO2-free processes have been increasing. One of the most expanding sources of electric power in the industrialised world today is the gas-fired combined cycle, combining high efficiency and low investment cost. In this paper, the...

Persistent link: https://www.econbiz.de/10011053950

Optimization of blade pitch angle of an axial turbine used for wave energy conversion

Mohamed, M.H.; Shaaban, S. - In: Energy 56 (2013) C, pp. 229-239

Wells turbine is a part of OWC (Oscillating Water Column) which is one of the most practical wave energy converters. However, they suffer low aerodynamic efficiency and consequently low power produced. It is proposed to improve the aerodynamic efficiency of Wells turbines by optimizing the blade...

Persistent link: https://www.econbiz.de/10011054547