Browsing by Author "Coskun, Can"

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Citation - WoS: 27
Citation - Scopus: 27
A new approach to determine the outdoor temperature distributions for building energy calculations
(Pergamon-Elsevier Science Ltd, 2014) Can Coskun; Mustafa Ali E. Ertürk; Zuhal Oktay; A. Hepbasli; Oktay, Zuhal; Ertürk, Mustafa; Coskun, Can; Hepbasli, Arif
This study formulated annual monthly and hourly ambient temperature distributions for simplifying the calculation of cooling and heating degree-hours. In this regard Turkey was selected as an application country of which 79 cities were considered for modeling purposes. The temperature data over a period of 42 years were also utilized in the analysis. Similar outdoor distributions were categorized in the same group. The analysis results showed eight main annual distribution trends for the cities in Turkey. Such a detailed analysis and categorization for the outdoor temperature has been done for the first time in the literature. The outdoor temperature distributions are very useful tools for determination of heating and cooling loads while they enable the calculation of the annual- monthly- and hourly-based degree-hours values. In this regard a population-based outdoor temperature distribution concept was also introduced to the literature and tested for Turkey. One temperature distribution was achieved for Turkey with reference to population. © 2013 Elsevier Ltd. All rights reserved. © 2013 Elsevier B.V. All rights reserved.
Citation - WoS: 17
Citation - Scopus: 18
Comparing advanced exergetic assessments of two geothermal district heating systems for residential buildings
(Elsevier Ltd, 2014) Ali Keçebaş; Can Coskun; Zuhal Oktay; A. Hepbasli; Kecebas, Ali; Oktay, Zuhal; Coskun, Can; Hepbasli, Arif
Advanced exergy analysis method has been increasingly utilized in analyzing and assessing the performance of energy-related systems in recent years due to more deeply investigating the exergy destructions. In this study two various geothermal district heating systems (GDHSs) the Afyon and Bigadiç GDHSs which have been operated in Turkey were considered to perform their advanced exergy analyses and assessments. The GDHSs studied were also compared with each other for the first time in terms of advanced exergetic aspects. In the analyses and calculations of the GDHS the actual operational data obtained from the measurements and technical staff were utilized. The overall conventional and advanced exergetic efficiency values for the Afyon GDHS are determined to be 27.53% and 34.72% while those for the Bigadiç GDHS are obtained to be 21.03% and 32.52% respectively. Considering both the interactions among components and the potential for improving components more effective and efficient improvement priorities were proposed. © 2014 Elsevier B.V. © 2014 Elsevier B.V. All rights reserved.