Browsing by Author "Araz, Mustafa"

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Citation - WoS: 347
Citation - Scopus: 419
A key review of building integrated photovoltaic (BIPV) systems
(Elsevier B.V., 2017) Emrah Biyik; Mustafa Araz; A. Hepbasli; Mehdi Shahrestani; Runming Yao; Li Shao; Emmanuel A. Essah; Armando Coelho Oliveira; Teodosio del Caño; Elena Rico; Shahrestani, Mehdi; Hepbasli, Arif; Biyik, Emrah; Yao, Runming; Shao, Li; Araz, Mustafa; Atli, Yusuf Baver
Renewable and sustainable energy generation technologies have been in the forefront due to concerns related to environment energy independence and high fossil fuel costs. As part of the EU's 2020 targets it is aimed to reach a 20% share of renewable energy sources in final energy consumption by 2020 according to EU's renewable energy directive. Within this context national renewable energy targets were set for each EU country ranging between 10% (for Malta) and 49% (for Sweden). A large share of renewable energy research has been devoted to photovoltaic systems which harness the solar energy to generate electrical power. As an application of the PV technology building integrated photovoltaic (BIPV) systems have attracted an increasing interest in the past decade and have been shown as a feasible renewable power generation technology to help buildings partially meet their load. In addition to BIPV building integrated photovoltaic/thermal systems (BIPV/T) provide a very good potential for integration into the building to supply both electrical and thermal loads. In this study we comprehensively reviewed the BIPV and BIPVT applications in terms of energy generation amount nominal power efficiency type and performance assessment approaches. The two fundamental research areas in the BIPV and BIPVT systems are observed to be i) improvements on system efficiency by ventilation hence obtaining a higher yield with lowering the panel temperature ii) new thin film technologies that are well suited for building integration. Several approaches to achieve these objectives are reported in the literature as presented in this paper. It is expected that this comprehensive review will be beneficial to researchers and practitioners involved or interested in the design analysis simulation and performance evaluation financial development and incentives new methods and trends of BIPV systems. © 2018 Elsevier B.V. All rights reserved.
Citation - WoS: 168
Citation - Scopus: 211
A key review of wastewater source heat pump (WWSHP) systems
(Elsevier Ltd, 2014) A. Hepbasli; Emrah Biyik; Orhan Ekren; Huseyin Gunerhan; Mustafa Araz; Ekren, Orhan; Araz, Mustafa; Hepbasli, Arif; Gunerhan, Huseyin; Biyik, Emrah
Heat pumps (HPs) are part of the environmentally friendly technologies using renewable energy and have been utilized in the developed countries for years. Wastewater is seen as a renewable heat source for HPs. At the beginning of the 1980s waste (sewage) water source heat pumps (WWSHPs) were widely applied in North European countries like Sweden and Norway and partially applied in China. In the past two decades the WWSHP has become increasingly popular due to its advantages of relatively higher energy utilization efficiency and environmental protection. The present study comprehensively reviews WWSHP systems in terms of applications and performance assessments including energetic exergetic environmental and economic aspects for the first time to the best of the authors' knowledge. In this context a historical development of WWSHPs was briefly given first. Next wastewater potential and its characteristics were presented while a WWSHP system was introduced. The previously conducted studies on WWSHPs were then reviewed and classified in a tabulated form. Finally some concluding remarks were listed. The COP values of the reviewed studies ranged from 1.77 to 10.63 for heating and 2.23 to 5.35 for cooling based on the experimental and simulated values. The performance assessments are mostly made using energy analysis methods while the number of exergetic evaluations is very low and has not been comprehensively performed. It is expected that the comprehensive review here will be very beneficial to those dealing with the design analysis simulation and performance assessment of WWSHP systems. © 2017 Elsevier B.V. All rights reserved.
Citation - Scopus: 2
A Long-term Period Performance Assessment of a Building Integrated Photovoltaic System
(EDP Sciences, 2019) Mustafa Araz; Emrah Biyikt; A. Hepbasli; Hepbasli, Arif; Araz, Mustafa; Biyikt, Emrah; N. Caetano
Building Integrated Photovoltaic (BIPV) systems can be defined as PV modules which can be integrated in building's envelope by replacing conventional building materials such as windows tiles etc. and have an impact on the functionality of the buildings. Considering the huge share (40%) of buildings in total energy consumption and nearly zero-energy building target of the European Union (EU) BIPV systems present a sustainable solution and have gained increased interest in last years. In this study the performance of a BIPV system which was installed on Feb. 8 2016 on the façade of a campus building at Yasar University Izmir Turkey within the framework a EU/FP7 project and has a capacity of 7.44 kWp is evaluated for a three-year period using first and second laws of thermodynamics. Within this context real (experimental) monthly and yearly electricity productions are determined and compared with the results obtained from the simulations. Energy and exergy efficiencies and performance ratios of the system are also calculated based on the cell and total areas. © 2019 Elsevier B.V. All rights reserved.
Citation - WoS: 31
Citation - Scopus: 33
Energy and exergy analysis of a PV-T integrated ethanol PEM electrolyzer
(Elsevier Ltd, 2021) Başar Ca̧ǧlar; Mustafa Araz; Huseyin Gunhan Ozcan; Atalay Calisan; A. Hepbasli; Ozcan, Huseyin Gunhan; Calisan, Atalay; Araz, Mustafa; Hepbasli, Arif; Caglar, Basar
A photovoltaic-thermal (PV-T) integrated ethanol proton exchange membrane electrolyzer (PEME) was proposed as a low-energy consuming energy storage option for renewable-sourced electricity as well as a way for simultaneous chemical production in this study. Energy and exergy analyses were applied to each component of the system (e.g. pumps heat exchanger PV-T PEME and separation unit (SPU)) and the whole system to assess the system performance. The mathematical modelling of the whole system along with its main components except for the SPU was done using the Engineering Equation Solver (EES) software package while the SPU was modelled through the ASPEN Plus. A detailed modelling of the PEME was also included. The effects of the PV-T and PEME parameters on energy and exergy efficiencies of the system were evaluated while the improvement potentials and scale up options were discussed. Energy and exergy efficiencies of the proposed system at the optimum operation of the PEME and under average climatic conditions in the city of Izmir Turkey were determined to be 27.8% and 3.1% respectively. Energy and exergy efficiencies of the system were mainly regulated by the PV-T and PEME whose energy and exergy efficiencies were 40.6% 56.6% and 13.8% 14.1% respectively. Effective PEME parameters for energy and exergy efficiencies of the system were membrane conductivity membrane thickness anode catalyst and the operation temperature of the PEME. By changing the PV-T and PEME parameters and by scale-up energy and exergy efficiencies of the system could be improved. © 2021 Elsevier B.V. All rights reserved.
Citation - WoS: 3
Citation - Scopus: 3
Exergoeconomic and exergoenvironmental assessment of a PV/T assisted wastewater source heat pump system for a sustainable future
(INDERSCIENCE ENTERPRISES LTD, 2021) Mustafa Araz; Arif Hepbasli; Huseyin Gunerhan; Hepbasli, Arif; Gunerhan, Huseyin; Araz, Mustafa
This paper investigated exergetic exergoeconomical and exergoenvironmental performances of a photovoltaic/thermal (PV/T) assisted wastewater source heat pump (WWSHP) system. The highest relative irreversibility among all the components occurred in the PV/T unit followed by the compressor. The functional exergy efficiencies of the WWSHP and whole system were found to be 0.10 and 0.15 respectively. The exergoeconomic factors of the condenser and wastewater heat exchanger were determined to be considerably high among all the components. The highest exergy loss per unit price was due to the PV/T system. Exergoeconomic factors for each equipment and the entire system decreased with increasing yearly working period and decreasing interest rate. The same trend was also observed in the specific cost of exergetic product. Exergy destruction related environmental impacts were found to be the major element in almost all of the components and therefore its reduction should be the main focus on exergoenvironmental performance improvements.
Citation - WoS: 5
Citation - Scopus: 5
Experimental exergoeconomic performance assessment of a wastewater source heat pump system
(Inderscience Publishers, 2019) Mustafa Araz; A. Hepbasli; Huseyin Gunerhan; Hepbasli, Arif; Gunerhan, Huseyin; Araz, Mustafa
This study aims at experimentally analysing and assessing the performance of a wastewater source heat pump system (WWSHP) in cooling mode which was installed at Yasar University Izmir Turkey through exergetic and thermoeconomic (exergoeconomic) analysis methods. Within this context first conventional exergy analysis was performed based on the actual experimental data where exergy efficiencies destructions and relative irreversibilities of each element were determined to indicate improvements. Then these results were combined with the cost data of the system to make exergoeconomic analysis. Functional exergy efficiencies of the entire system and the WWSHP were obtained to be 7.56% and 11.77% respectively. The compressor had the biggest relative irreversibility which was followed by the fan-coil. The exergoeconomic factor values of the condenser WW heat exchanger (WWHE) and fan-coil unit were lower than 0.5 indicating that the exergy destruction costs associated with these components were higher than the capital investments. © 2020 Elsevier B.V. All rights reserved.
Özgün Güneş Fotovoltaik/Isıl (Pv/T) Destekli Bir Atıksu Isı Pompası Sisteminin Tasarımı, Kurulumu ve Deneysel Araştırılması
(2016) Çulha, Oğuzhan; Hepbaşlı, Arif; Bıyık, Emrah; Ekren, Orhan; Araz, Mustafa; Öztop, Hakan Fehmi; Gunerhan, Huseyin
In this research project, it was aimed at designing and constructing a hybrid Photovoltaic/Thermal (PV/T) solar-assisted wastewater source heat pump (WWSHP) and evaluating its performance through various energetic and exergetic analysis methods. The WWSHP system consisting of three (a HP, a WW and an end-user) cycles was installed at Yasar University, Izmir, Turkey. Within the scope of the project, a total of 18 experiments was conducted and recorded to assess the performance of the system using various analysis methods such as energy, exergy, exergoeconomic, exergoenvironmental, low-exergy (lowex) methods. A three-dimensional design of different WW heat exchangers (WWHEs) was made at various geometries and lengths while their performance, fluid and heat transfer tests were modeled using computational fluid dynamics (CFD) method. A dynamic model of the heat pump system was also developed using system identification methods, and was used within the model predictive controller to estimate the system’s response to control actions. The results indicated that the overall COP and exergy efficiency values of the system were in the range of 1.85-5.89 and 3.39% and 20.71% , respectively. The PV/T unit accounted for the biggest exergy destruction, followed by the compressor and the fan-coil unit. The fan-coil unit caused a decrease in the overall COP and exergy efficiency values due to the higher energy consumption and higher exergy destructions. The exergy efficiency and flexibility factor values from the primary energy transformation to the building envelope were determined to be 5.66% and 14.51% through the lowex analysis, respectively. Based on exergoeconomic and exergoenvironmental analysis results, the exergoeconomic factor values were obtained to be larger than 0.5 for the system components excluding the fan-coil unit and the PV/T system while the exergoenvironmental factor values were obtained to be smaller than 0.5 for the system components excluding the condenser and the pumps.
Citation - WoS: 8
Citation - Scopus: 11
Performance evaluation of a building integrated photovoltaic (BIPV) system combined with a wastewater source heat pump (WWSHP) system
(ELSEVIER SCIENCE BV, 2017) Mustafa Araz; Arif Hepbasli; Emrah Biyik; Mehdi Shahrestani; Runming Yao; Emmanuel Essah; Li Shao; Armando C. Oliveira; Orhan Ekren; Huseyin Gunerhan; Essah, Emmanuel; Shahrestani, Mehdi; Hepbasli, Arif; Biyik, Emrah; Yao, Runming; Araz, Mustafa; Gunerhan, Huseyin; FR DAmbrosio; Alfano; L Mazzarella; P Romagnoni
This paper deals with both energetic and exergetic performance assessments of two combined systems as a whole. The first one is a Building Integrated Photovoltaic (BIPV) system while the second one is a wastewater (WW) Source Heat Pump (WWSHP) system. Both systems were installed at Yasar University Izmir Turkey within the framework of EU/FP7 and the Scientific and Technological Research Council of Turkey (TUBITAK) funded projects respectively. The BIPV system was commissioned on 8 February 2016 and has been successfully operated since then while the WWSHP system was put into operation in October 2014. The BIPV system has a total peak power of 7.44 kW and consists of a total of 48 Crystalline Silicon (c-Si) modules with a gap of 150 mm between the modules and the wall and a peak power per PV unit of 155 W-p. The WWSHP system consists of three main subsystems namely (i) a WW system (ii) a WWSHP and (iii) an end user system. Two systems considered have been separately operated while the measured values obtained from both systems have been recorded for performance assessment purposes. In this study a combined system was conceptually formed and the performance of the whole system was evaluated using actual operational data and some assumptions made. Exergy efficiency values for the WWSHP system and the whole system were determined to be 72.23% and 64.98% on product/fuel basis while their functional exergy efficiencies are obtained to be 20.93% and 11.82% respectively. It may be concluded that the methodology presented here will be very beneficial to those dealing with the design and performance analysis and evaluation of BIPV and WWHP systems. (C) 2017 The Authors. Published by Elsevier Ltd.
Citation - WoS: 9
Citation - Scopus: 14
Sustainability indicators of a naturally ventilated photovoltaic façade system
(Elsevier Ltd, 2020) Daniel Garraín; Israel Herrera-Orozco; Irene Rodríguez-Serrano; Yolanda Lechón; A. Hepbasli; Mustafa Araz; Emrah Biyik; Runming Yao; Mehdi Shahrestani; Emmanuel A. Essah; Lechon, Yolanda; Herrera, Israel; Hepbasli, Arif; Garrain, Daniel; Araz, Mustafa; Rodriguez-Serrano, Irene; Oliveira, Armando C.
Building Integrated Photovoltaic (BIPV) systems have been increasingly used as a means to generate electricity on-site and their diffusion will increase in the near future. The objective of this article is to carry out a sustainability assessment of a BIPV system installed in Turkey regarding the three pillars: environmental economic and social potential impact in order to develop different indicators. For the socioeconomic analysis a Multiregional Input-Output (MRIO) method was used to estimate production of goods and services value added creation and employment opportunities. For the environmental evaluation an Environmental Footprint (EF) analysis was performed. The levelized electricity costs and the greenhouse gas emissions abatement costs were also calculated. Results showed that the socioeconomic effects are relevant although only a 23% of these effects remain in Turkey. The environmental profile is also good in terms of climate change impacts showing substantial reductions in greenhouse gas emissions compared to fossil fuel alternatives for electricity generation. Regarding the life cycle stages of the technology the highest environmental impacts are produced in the PV manufacturing processes. The electricity produced is still more costly than fossil-based technologies and in the highest range of PV technologies but greenhouse gases abatement costs are not so high when compared to other references. © 2020 Elsevier B.V. All rights reserved.
Citation - WoS: 3
Citation - Scopus: 3
Thermoeconomic analysis and evaluation of a building-integrated photovoltaic (BIPV) system based on actual operational data
(Springer Verlag, 2018) A. Hepbasli; Mustafa Araz; Emrah Biyik; Runming Yao; Mehdi Shahrestani; Emmanuel A. Essah; Li Shao; Armando Coelho Oliveira; Teodosio del Caño; Elena Rico; Essah, Emmanuel; Shahrestani, Mehdi; Lechón, Juan Luis; Hepbasli, Arif; Biyik, Emrah; Yao, Runming; Luis Lechon, Juan; Araz, Mustafa
In this chapter we considered a building-integrated photovoltaic (BIPV) system which was installed at Yasar University in Izmir Turkey within the framework of an EU/FP7-funded project and has been successfully operated since February 8 2016. The BIPV system consists of 48 crystalline silicon (c-Si) modules in 4 rows and 12 columns and the total capacity is 7.44 kWp. We applied the specific exergy costing (SPECO) method to the BIPV system for the first time to the best of the authors’ knowledge. In this regard we briefly introduced the BIPV system in this study first. We then used the SPECO method for assessing the performance of the BIPV system. Exergetic costs associated with the generated electricity varied between 0.21 and 0.36 €/kWhex for the selected days with an average exergetic cost of 0.368 €/kWhex for the whole year. © 2021 Elsevier B.V. All rights reserved.
Yaşar Üniversitesi’nde Kurulan Binaya Entegre Bir Fotovoltaik Sistemin Dinamik Performansının Değerlendirilmesi
(2018) Arif HEPBAŞLI; Emrah BIYIK; Mehdi SHAHRESTANI; Runming YAO; Emmanuel ESSAH; Li SHAO; Armando C. OLIVEIRA; Teodosio DEL CANO; Elena RICO; Juan Luis LECHON; Mustafa Araz; Essah, Emmanuel; Shahrestanı, Mehdi; Hepbaşlı, Arif; Bıyık, Emrah; Yao, Runming; Shao, Li; Araz, Mustafa
Binaya Entegre (ya da bina ile bütünleşik) Fotovoltaik (FV) Sistemler (Building Integrated PV Systems: BIPV Sistemler) dünya çapında güneş endüstrisinde en hızlı gelişen teknolojidir. Bu sistemler elektrik üretimini bina kabuğunun diğer fonksiyonlarıyla kombine eden çok fonksiyonlu yapı elemanları olarak görülmektedir. Yaşar Üniversitesi’ndeki bir binanın yan duvarlarına 15 ortaktan oluşan 7. Çerçeve Avrupa Komisyonu projesi (REELCOOP olarak adlandırılan) kapsamında bir binaya entegre fotovoltaik (BEFV) sistemi 8 Şubat 2016 tarihinde kuruldu. Bu sistemin toplam pik gücü 7 44 kW olup toplam 48 adet kristal silisyum (o-Si) FV modülden oluşmaktadır. Modüller ile duvar arasında 150 mm boşluk vardır. Toplam hücre ve cephe yüzey alanları sırasıyla 42 08 m2 ve 57 6 m2’dir. Söz konusu BEFV sisteminin bazı ön deneysel modelleme ve sayısal çalışmaları projenin ortaklarından biri olan İngiltere’deki Reading Üniversitesi’nden bir araştırma grubu tarafından yapılarak Yaşar Üniversitesi’ne kurulacak en iyi BEFV sistemi seçildi. Bu sistemin FV hücreleri projenin diğer ortağı olan bir İspanyol firması tarafından tasarlanıp imal edildi. Bu çalışmada öncelikle BEFV sistemler kısaca açıklandı ve performans değerlendirilmesinde kullanılan temel bağıntılar verildi. Daha sonra Yaşar Üniversitesi kampüsündeki mevcut bir binanın cephesine kurulan BEFV sistemi kısaca tanıtıldı. Son olarak sistemin kurulduğu tarihten bugüne kadar geçen bir dönemde sistemin performansı değerlendirildi. Bugünkü bilgimize göre Avrupa Komisyonu projesi kapsamında bir Ar-Ge’ye dayalı olarak ülkemizde ilk defa Yaşar Üniversitesi’nde kurulan bir BEFV sisteminden elde edilen deneyimin bu konuda çalışan tasarımcı uygulayıcı mühendis ve mimarlara katkı sağlayacağı yazarlar tarafından beklenmektedir.