Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - WoS: 34Citation - Scopus: 41Assessment of Geothermal Energy Use With Thermoelectric Generator for Hydrogen Production(Pergamon-Elsevier Science LTD, 2021) Hadjiat, M. M.; Hancıoğlu, Ebru; Mraoui, A.; Ouali, S.; Hancıoğlu Kuzgunkaya, Ebru; Salhi, K.; Ouali, A. Ait; Benaouda, N.In this work, a new model for producing hydrogen from a low enthalpy geothermal source was presented. Thermal energy from geothermal sources can be converted into electric power by using thermoelectric modules instead of Organic Rankine Cycle (ORC) machines, especially for low geothermal temperatures. This electrical energy uses the water electrolysis process to produce hydrogen. Simulation and experiments for the thermoelectric module in this system were undertaken to assess the efficiency of these models. TRNSYS software is used to simulate the system in Hammam Righa spa, the temperature of this spring is 70 degrees C. Obtained results reveal that in hammam righa spa in Algeria, 0.5652 Kg hydrogen per square meter of thermoelectric generator (TEG) can be produced in one year. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.Conference Object Energy-Efficient Resource Allocation for Multiuser Ofdm Wireless Networks(Institute of Electrical and Electronics Engineers Inc., 2015) Durbaş, Şükrü; Özbek, BernaIn the last decades, the energy consumption in wireless communication systems is increasing and becoming a major problem for cellular operators. As a result of that, solutions to increase energy-efficiency (EE) in wireless networks are becoming more popular. Therefore, the resource allocation algorithms that provides EE for multiuser OFDM based wireless networks is presented in this paper. Then, the conventional spectrum-efficient (SE) designs are compared with EE based schemes and EE characteristics of the system has been analyzed. The simulation results show the advantages of EE scheme especially on high channel-gain-to-noise ratio and low number of users cases.Article Citation - WoS: 14Citation - Scopus: 14Thermal Simulation of Retrofits To Existing Mass Housing in Turkey for Energy Efficiency(Sila Science, 2011) Yıldız, Yusuf; Durmuş Arsan, ZeynepEnergy consumption in the existing residential building stock in Turkey is currently excessive. Mass housing, comprising a major portion of the officially-registered residential stock, carries enormous potential for energy savings even in the short run. This paper describes a case study in a mass housing area in Izmir, Turkey, in order to demonstrate the possibility of significant energy savings by implementing case-specific energy-efficient retrofitting scenarios and relating them with the payback periods. Building energy analysis software was used to examine thirteen scenarios consisting of various combinations of four main retrofitting options: addition of extra insulation for building envelope, replacement of existing glazing, regulation of air infiltration rate and indoor set point temperature. These scenarios revealed that annual energy savings of up to 62% are achievable and that the customer payback period for the best retrofitting scenario is 34 years.