Browsing by Author "Ekren, O."

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    Performance Assessment of a Near Room Temperature Magnetic Cooling System
    (Elsevier Ltd, 2017) Orhan Ekren; Ahmet Yilanci; Mehmet Akif Ezan; Murat Kara; Emrah Biyik; Ekren, O.; Kara, M.; Yilanci, A.; Ezan, M.A.; Biyik, E.; N.S. Caetano , N.S. Caetano , M.C. Felgueiras , M.A. Forment
    In this study performance of a near room temperature magnetic cooling system was investigated experimentally in terms of temperature span. The current setup has a permanent magnet pairs (0.7 Tesla) a magnetocaloric material (Gadolinium) and a heat transfer fluid (water ethylene glycol and 10% ethanol-water mixing) furthermore solar energy was used as a power source of liner motion of the magnetic system. The obtained results showed that ethanol-water was the best heat transfer fluid and also that optimum magnetization-demagnetization period for the system was found 10 s. © 2017 Elsevier B.V. All rights reserved.
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    Citation - WoS: 1
    Citation - Scopus: 1
    Radiant Heating-cooling Performance Assessment in a Shopping Center in Sopron Hungary
    (Elsevier Ltd, 2017) Orhan Ekren; A. Hepbasli; Emrah Biyik; Hepbasli, A.; Ekren, O.; Biyik, E.; N.S. Caetano , N.S. Caetano , M.C. Felgueiras , M.A. Forment
    In this study performance of a radiant heating-cooling via air source heat pump was investigated. This study is part of a project funded by European Union's FP7 for research technological development and demonstration. In the project it is aimed that a holistic retrofitting solution for commercial buildings to reduce primary energy consumption down to less than 80 kWh/m2 per year. A shopping center called IKVA located in Sopron Hungary used as a demo building. In that building a heat pump system integrated with a radiant heating and cooling system is used. In this paper two different cases are compared regarding air source heat pump system, in Case-1 air source of the heat pump is outdoor air in Case-2 air source of heat pump is return air. © 2017 Elsevier B.V. All rights reserved.