İlgin Beyazit, Nesrin

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Faz Değiştiren Malzemeli Duvarlarda Sıcaklık Dağılımının Nümerik Analizi
(2021) Beyazıt, Nesrin İlgin; Özel, Meral; Çakmak, Fethi Ahmet
Bu çalışmada, bina dış duvarlarında geleneksel ısı yalıtım malzemesi yerine faz değiştiren malzeme (FDM) kullanılarak duvar kalınlığı boyunca sıcaklık dağılımı ANSYS’de sayısal olarak araştırılmıştır. Bu amaç için Elazığ ilinin kış iklim şartları göz önünde bulundurularak güney ve kuzeye bakan bir duvar için beş farklı duvar modeli ele alınmıştır. Belirlen bu duvar modelleri için ilk önce duvarın kalınlığı boyunca sıcaklık dağılımları hesaplanmış ve daha sonra ise ısıl depolama kapasitelerini temsil eden faz kayması ve sönüm oranları tespit edilmiştir. Sonuç olarak özellikle FDM’nin kullanılmasıyla duvar içerisindeki sıcaklık dalgalanmalarının oldukça fazla sönümlenerek birbirine yakın sıcaklık değerlerinin elde edildiği ve duvar içerisinde hemen hemen sabit kaldığı görülmüştür. Ayrıca maksimum faz kayması ve minimum sönüm oranı açısından en iyi duvar yapısının FDM’nin dışta olduğu durumda elde edildiği görülmüştür.
Citation - WoS: 7
Citation - Scopus: 7
Modelling of the Hourly Horizontal Solar Diffuse Radiation in Sanliurfa, Turkey
(Vinca inst Nuclear Sci, 2020) Beyazit, Nesrin Ilgin; Unal, Fatih; Bulut, Husamettin
Horizontal diffuse solar radiation has been calculated over various models by using the total radiation data obtained from the horizontal surface due to reasons such as lack of adequate measurements and expensive measuring instruments. hi this study, the measurements were calculated using the obtained data between the years 2009 and 2016 from solar radiation measurement system with solar tracking system, which belongs to the Department of Mechanical Engineering, Sanliurfa Harran University, Turkey. Three horizontal solar diffuse radiation models have been proposed by using the relationship between the diffuse radiation ratio and the clarity index obtained by eight years data. Horizontal solar diffuse radiation values were calculated and compared with the measurement data for Sanliurfa by using 15 models of diffuse radiation given in the literature and the results obtained from the models. The statistical errors of the proposed models and 15 different diffusive radiation models were calculated. As dijfuse radiation varies with time, it is determined that modelling of Model 1 and Model 2 obtained from Sanliurfa data gives better results in terms of clarity index constraints. Furthermore, although the desired success cannot be achieved with Model 2 in terms of t(stat), it has been determined that the relevant model provides better results than many models when compared to statistical errors. With the improvements to be made on Model 2, a local estimation model is thought to give better results.

Journal	Count
Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi	1
Thermal Science	1

İlgin Beyazit, Nesrin

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