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Development of thermoelectric oxides for renewable energy conversion technologies

Weidenkaff, A.; Robert, R.; Aguirre, M.; Bocher, L.; … - In: Renewable Energy 33 (2008) 2, pp. 342-347

Geothermal and solar heat can be directly converted into electricity by using thermoelectric generators. Perovskite …

Persistent link: https://www.econbiz.de/10010806933

Investigation on generated power of thermoelectric roof solar collector

Maneewan, S.; Khedari, J.; Zeghmati, B.; Hirunlabh, J.; … - In: Renewable Energy 29 (2004) 5, pp. 743-752

The aim of this paper was to conduct lab-scale investigation of a new roof design concept termed “the thermoelectric roof solar collector (TE-RSC)” for power generation using solar energy. The TE-RSC was composed of a transparent acrylic sheet, air gap, a copper plate, thermoelectric modules...

Persistent link: https://www.econbiz.de/10011045848

A practical model for evaluating the performance of proton exchange membrane fuel cells

Moreira, Marcos V.; Silva, Gisele E. da - In: Renewable Energy 34 (2009) 7, pp. 1734-1741

Several models have been proposed in the literature to predict the performance of proton exchange membrane fuel cells (PEMFC). These models have different levels of complexity and can be divided basically into two groups: (i) mechanistic (theoretical); and (ii) semi-empirical models. The...

Persistent link: https://www.econbiz.de/10010804121

Modelling of proton exchange membrane fuel cell performance based on semi-empirical equations

Al-Baghdadi, Maher A.R. Sadiq - In: Renewable Energy 30 (2005) 10, pp. 1587-1599

Using semi-empirical equations for modeling a proton exchange membrane fuel cell is proposed for providing a tool for the design and analysis of fuel cell total systems. The focus of this study is to derive an empirical model including process variations to estimate the performance of fuel cell...

Persistent link: https://www.econbiz.de/10010804395

The solar furnaces for scientific and technological investigation

Trefilov, V.I.; Schur, D.V.; Pishuk, V.K.; … - In: Renewable Energy 16 (1999) 1, pp. 757-760

For the last 25 years the National Academy of Sciences of Ukraine in common with the leading firms of aero-space complex of USSR have created several experimental solar furnaces used for making of new technique and technologies. These units are the parabolical concentrators of solar energy of...

Persistent link: https://www.econbiz.de/10010804801

Effects of rare earth ion modifications on the photoelectrochemical properties of ZnO-based dye-sensitized solar cells

Lu, Lanlan; Li, Renjie; Peng, Tianyou; Fan, Ke; Dai, Ke - In: Renewable Energy 36 (2011) 12, pp. 3386-3393

lead to a decreased short-circuit photocurrent. The optimal conversion efficiency is obtained from the Gd-ion modified ZnO …

Persistent link: https://www.econbiz.de/10010805453

Effect of operating methods of wind turbine generator system on net power extraction under wind velocity fluctuations in fields

Wakui, Tetsuya; Yamaguchi, Kazuya; Hashizume, Takumi; … - In: Renewable Energy 16 (1999) 1, pp. 843-846

The effect of how a wind turbine generator system is operated is discussed from the viewpoint of net power extraction with wind velocity fluctuations in relation to the scale and the dynamic behavior of the system. On a wind turbine generator system consisting of a Darrieus-Savonius hybrid wind...

Persistent link: https://www.econbiz.de/10010805975

Vehicle hybridization with fuel cell, supercapacitors and batteries by sliding mode control

Ayad, M.Y.; Becherif, M.; Henni, A. - In: Renewable Energy 36 (2011) 10, pp. 2627-2634

This paper treats the design and control of two hybrid source using supercapacitors, fuel cell, with and without batteries on the DC link. A fuel cell, as a slowest dynamic source in these systems (because of its auxiliaries) acts to supply the permanent energy. The supercapacitors, as a high...

Persistent link: https://www.econbiz.de/10010806366

Endoreversible terrestrial solar energy conversion

Wright, S.E. - In: Renewable Energy 33 (2008) 12, pp. 2631-2636

The analysis of reversible radiation conversion is insightful in process optimization and provides the upper limit to … inherently irreversible process. Likewise, heat rejection from the conversion device is unavoidable and dependent on local … conversion process. In this paper, the effect of these irreversibilities on performance is investigated for a model with …

Persistent link: https://www.econbiz.de/10010806436

Energy analysis of a solar-assisted ejector cycle air conditioning system with low temperature thermal energy storage

Diaconu, Bogdan M. - In: Renewable Energy 37 (2012) 1, pp. 266-276

Thermal energy storage is essential in solar cooling applications due to intermittent and uncontrollable availability of solar energy. Various technologies are available for low temperature energy storage. In the present work, a solar-assisted ejector cooling system with latent heat cold storage...

Persistent link: https://www.econbiz.de/10010806637