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A computationally efficient method for the design of the heliostat field for solar power tower plant

Besarati, Saeb M.; Yogi Goswami, D. - In: Renewable Energy 69 (2014) C, pp. 226-232

A number of codes have been developed in order to optimize the heliostat field layout for solar power tower plants. These codes are intended to improve calculation accuracy as well as computational time. Of all the factors that need to be taken into account in these codes, shading and blocking...

Persistent link: https://www.econbiz.de/10011044552

Evaluation of solar radiation properties by statistical tools and wavelet analysis

Peled, A.; Appelbaum, J. - In: Renewable Energy 59 (2013) C, pp. 30-38

With high penetration of PV generation in power grid distribution systems, solar irradiance fluctuations introduced by …. Predicting the characteristics of the fluctuations requires a mathematical approach, such as the combination of a statistical … to evaluate the magnitude and the persistence of the various fluctuations of the solar radiation. The method presented in …

Persistent link: https://www.econbiz.de/10010805133

Models of diffuse solar radiation

Boland, John; Ridley, Barbara; Brown, Bruce - In: Renewable Energy 33 (2008) 4, pp. 575-584

For some locations both global and diffuse solar radiation are measured. However, for many locations, only global is measured, or inferred from satellite data. For modelling solar energy applications, the amount of radiation on a tilted surface is needed. Since only the direct component on a...

Persistent link: https://www.econbiz.de/10010805497

Mathematical modelling of electricity market with renewable energy sources

Marchenko, O.V. - In: Renewable Energy 32 (2007) 6, pp. 976-990

The paper addresses the electricity market with conventional energy sources on fossil fuel and non-conventional renewable energy sources (RESs) with stochastic operating conditions.

Persistent link: https://www.econbiz.de/10010806017

Model validation of a CFB biomass gasification model

Miao, Qi; Zhu, Jesse; Barghi, Shahzad; Wu, Chuangzhi; … - In: Renewable Energy 63 (2014) C, pp. 317-323

The developed 1-dimensional biomass gasification mathematical model [1] was validated using the experimental results obtained from a circulating fluidized bed biomass gasifier. The reactor was operated on rice husk at various equivalence ratios (ER), fluidization velocities and biomass feed...

Persistent link: https://www.econbiz.de/10010806282

Frosting of heat pump with heat recovery facility

Liu, Di; Zhao, Fu-Yun; Tang, Guang-Fa - In: Renewable Energy 32 (2007) 7, pp. 1228-1242

This paper aims to prolong the heat pump frost time and reduce its growth with heat recovery facility, which should mix the exhausted indoor and outdoor air before entering the evaporator. An ideal mathematic model is developed for heat transfer, frost generation and airside pressure drop. The...

Persistent link: https://www.econbiz.de/10010806543

A mathematical model of thermal performance of a solar air heater with slats

Ammari, H.D. - In: Renewable Energy 28 (2003) 10, pp. 1597-1615

A mathematical model for computing the thermal performance of a single pass flat-plate solar air collector is presented. Air channels were formed by providing metal slats running along the circulated air passage linking the absorber plate by the bottom one in an endeavor to enhance the thermal...

Persistent link: https://www.econbiz.de/10010807224

The use of hydrogen in the rural sector in Venezuela: Technical and financial study of the storage phase

Posso, F.; Contreras, A.; Veziroglu, A. - In: Renewable Energy 34 (2009) 5, pp. 1234-1240

The aim of this work is to develop and evaluate a mathematical model for the process of storing hydrogen obtained from hydroelectricity via electrolysis, for use as an energetic vector in rural areas of Venezuela. Following an exhaustive bibliographical review of the subject, pressurized...

Persistent link: https://www.econbiz.de/10010804175

Heat transfer analysis and experimental verification of casted heat exchanger in non-icing and icing conditions in winter

Yu, Jie; Zhang, Huan; You, Shijun - In: Renewable Energy 41 (2012) C, pp. 39-43

Seawater-source heat pump systems (SWHP) are recognized to be outstanding heating, cooling and water heating systems. A large number of SWHP systems have been used in residential and commercial buildings in coastal areas due to the attractive advantages of high efficiency and environmental...

Persistent link: https://www.econbiz.de/10010804984

A mathematical model for calculating cross-sectional properties of modern wind turbine composite blades

Wang, Lin; Liu, Xiongwei; Guo, Lianggang; Renevier, Nathalie - In: Renewable Energy 64 (2014) C, pp. 52-60

A wind turbine blade generally has complex structures including several layers of composite materials with shear webs. It is essential but also inherently difficult to accurately and rapidly calculate the cross-sectional properties of a complex composite blade for the structural dynamics and...

Persistent link: https://www.econbiz.de/10010805255