Profile URL: https://hdl.handle.net/20.500.12514/8325
Job Title:Dr. Öğr. Üyesi
Main Affiliation:Department of Machine and Metal Technologies / Makine ve Metal Teknolojileri Bölümü
Status: Former Staff
Name Variants:
Beyazit, Nesrin Ilgin Beyazıt, Nesrin İlgin
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Article Faz Değiştiren Malzemeli Duvarlarda Sıcaklık Dağılımının Nümerik Analizi(2021-12-31) Beyazıt, Nesrin İlgin; Özel, Meral; Çakmak, Fethi AhmetBu 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.Article Citation - WoS: 8Citation - Scopus: 8Modelling of the Hourly Horizontal Solar Diffuse Radiation in Sanliurfa, Turkey(Vinca inst Nuclear Sci, 2020) Beyazit, Nesrin Ilgin; Unal, Fatih; Bulut, HusamettinHorizontal 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.Article Economic and Environmental Benefits of Heating of Poultry Houses with Geothermal Energy: A Case Study for Nevşehir Province of Turkey(2024) Beyazit, Nesrin Ilgin; Öztürk, HasanIn this study, as an example of the use of geothermal energy resources for the air-conditioning of animal shelters, the technical, economic and environmental gains that will be achieved in the case of heating a chicken coop with a total floor area of 480 m2 in Nevşehir province of Turkey in the winter months have been evaluated. For this purpose, a standard chicken coop with a length of 40 m, a width of 12 m and a height of 2.5 m and a capacity of 4320 chickens has been considered. The optimum indoor temperature for adult chickens is considered to be 22 °C. The total heat losses related to the different structural components of the considered standard house were determined. The annual total highest heat load for the poultry house was calculated as Qt = 197.32 kW. For geothermal resources suitable for house heating in the region, the amount of heat to be gained from the geothermal fluid to the house environment was calculated, taking into account the lowest physical properties (the lowest temperature Tgeo = 30 °C and the lowest flow rate mgeo = 30 m3/h). Since the amount of heat energy gained to the poultry environment with geothermal fluid (Qgeo=278.96 kW) is higher than the total heat losses (Qt = 197.32 kW) of the poultry house (Qgeo>Qt), it can be used for poultry heating with geothermal fluid. In case the considered poultry house is heated with geothermal energy, a total of 45073 kg of fuel will be saved annually from LPG consumption and 42186.4 kg of diesel fuel consumption will be saved. If Diesel or LGP fuel is used instead of geothermal fluid for poultry heating, the annual total fuel cost will be 266 211.6 TL for LPG usage and 274 585.2 TL for Diesel usage. In case the considered house is heated with geothermal energy, 136 571.2 kgCO2-eq or 133 798.3 kgCO2-eq from the annual total greenhouse gas emissions will save compared to the use of LPG and Diesel, respectively.