Hepbaşli, Arif
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Name Variants
Hepbasli Arif
Job Title
Prof.Dr.
Email Address
Main Affiliation
01.01.09.04. Enerji Sistemleri Mühendisliği Bölümü
Status
Current Staff
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ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
2
Research Products
3GOOD HEALTH AND WELL-BEING
0
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
12
Research Products
7AFFORDABLE AND CLEAN ENERGY
92
Research Products
8DECENT WORK AND ECONOMIC GROWTH
22
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
16
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10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
13
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
17
Research Products
13CLIMATE ACTION
17
Research Products
14LIFE BELOW WATER
1
Research Products
15LIFE ON LAND
1
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
2
Research Products
Documents
401
Citations
19938
h-index
80
Documents
280
Citations
14280
Scholarly Output
169
Articles
137
Views / Downloads
3/1
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
5590
Scopus Citation Count
6387
Patents
0
Projects
0
WoS Citations per Publication
33.08
Scopus Citations per Publication
37.79
Open Access Source
24
Supervised Theses
0
| Journal | Count |
|---|---|
| Energy Conversion and Management | 21 |
| International Journal of Exergy | 18 |
| Energy and Buildings | 16 |
| International Journal of Hydrogen Energy | 11 |
| Energy | 8 |
Current Page: 1 / 13
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169 results
Scholarly Output Search Results
Now showing 1 - 10 of 169
Article Citation - WoS: 61Citation - Scopus: 67Experimental and numerical studies to assess the energy performance of naturally ventilated PV facade systems(PERGAMON-ELSEVIER SCIENCE LTD, 2017) Mehdi Shahrestani; Runming Yao; Emmanuel Essah; Li Shao; Armando C. Oliveira; Arif Hepbasli; Emrah Biyik; Teodosio del Cano; Elena Rico; Juan Luis Lechon; Essah, Emmanuel; Shahrestani, Mehdi; Lechón, Juan Luis; Hepbasli, Arif; Yao, Runming; Shao, Li; Luis Lechon, Juan; Oliveira, Armando C.This paper presents a holistic approach to assess the energy performance of a naturally ventilated PV facade system. A rigorous combined experimental and numerical approach is established. The real energy performance of the system has been evaluated through a long-term high resolution monitoring of a typical ventilated PV facade system. A numerical model based on TRaNsient SYstem Simulation (TRNSYS) package was developed to assess the thermal and energy performance of the system which has been verified by a series of statistical analysis using the data collected from the experiment. The validated model was then used to assess the energy and thermal performance of a 7.4 kWp prototype ventilated PV facade system in Izmir Turkey. The results of this study demonstrated that ventilation in the air cavity of the PV facade system could significantly improve energy performance of the system even in a southeast facing facades. The quantitative analysis provides useful guidance to the system designers for the improvement of energy efficiency of the PV facade system. (C) 2017 The Authors. Published by Elsevier Ltd.Article Citation - WoS: 53Citation - Scopus: 56Advanced Exergy Analysis of a Heat Pump Drying System Used in Food Drying(Taylor & Francis Inc, 2013) Zafer Erbay; A. Hepbasli; Hepbasli, Arif; Erbay, ZaferExergy analysis has been used as a powerful tool to study and optimize various types of energy systems. However the methodology of splitting the exergy destructions (the so-called advanced exergy analysis) allows for a further understanding of the exergy destruction values to improve the system efficiency. In this study advanced exergy analysis was applied to a pilot-scale heat pump drying system used in food drying for the first time to evaluate its performance at different drying temperatures. The results showed that inefficiencies within the compressor and condenser were mainly due to the internal operating conditions and the efficiencies in the evaporator and heat recovery system could be improved by structural improvements of the whole system and remaining system components. © 2013 Copyright Taylor and Francis Group LLC. © 2013 Elsevier B.V. All rights reserved.Article Citation - WoS: 138Citation - Scopus: 156Exergoeconomic- enviroeconomic and sustainability analyses of a novel air cooler(ELSEVIER SCIENCE SA, 2012) Hakan Caliskan; Ibrahim Dincer; Arif Hepbasli; Hepbasli, Arif; Dincer, Ibrahim; Caliskan, HakanThis study presents the energy exergy environmental exergoeconomic enviroeconomic and sustainability analyses of the Maisotsenko cycle based novel air cooler considering the nine different dead state temperatures while the environment temperature is kept constant. In the energy analysis the wet bulb and dew point effectivenesses cooling capacity energetic coefficient of performance and primary energy ratio rates are calculated. Also in the exergy analysis exergy input output loss and destruction rates as well as exergetic coefficient of performance and primary exergy ratio and exergy efficiency values are determined. Furthermore sustainability analysis of the system is conducted through a sustainability index method. The electrical energy consumption cost of this novel air cooler shows that it consumes only 59.85 $/year when it is operated 8 h a day and 125 days in a year. The maximum exergetic cost rate is found to be 0.0228 kWh/$-year at a dead state temperature of 37.77 degrees C. Also according to the enviroeconomic (environmental cost) analysis this novel air cooler has very CO2 emissions cost as 6.96 $/year. Consequently these results show the originality of the Maisotsenko cycle based novel air cooler. (C) 2012 Elsevier B.V. All rights reserved.Book Part Citation - WoS: 3Citation - Scopus: 3Thermoeconomic 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, MustafaIn 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.Article Citation - WoS: 104Citation - Scopus: 110Energetic and exergetic comparison of basic and ejector expander refrigeration systems operating under the same external conditions and cooling capacities(PERGAMON-ELSEVIER SCIENCE LTD, 2015) N. Bilir Sag; H. K. Ersoy; A. Hepbasli; H. S. Halkaci; Halkaci, H. S.; Bilir Sag, N.; Hepbasli, A.; Sag, N. Bilir; Ersoy, H. K.An experimental study was conducted on vapor compression refrigerators using R134a refrigerant for the purpose of achieving energy recovery and decreasing the effects of irreversibility. An ejector was used as an expander instead of an expansion valve. The coefficient of performance of the ejector refrigeration system and the amount of irreversibility and efficiency of each of its components were determined and compared with those of a basic vapor compression refrigeration system of the same cooling capacity under the same external conditions. It was found that the ejector expander system exhibited a lower total irreversibility in comparison with the basic system. When the ejector was used as the expander in the refrigeration system the coefficient of performance was higher than in the basic system by 7.34-12.87% while the exergy efficiency values were 6.6-11.24% higher than in the basic system. (C) 2014 Elsevier Ltd. All rights reserved.Article Citation - WoS: 5Citation - Scopus: 5Experimental exergoeconomic performance assessment of a wastewater source heat pump system(Inderscience Publishers, 2019) Mustafa Araz; A. Hepbasli; Huseyin Gunerhan; Hepbasli, Arif; Gunerhan, Huseyin; Araz, MustafaThis 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.Article Citation - WoS: 6Citation - Scopus: 6Extended exergy analysis of a solar driven water production plant via reverse osmosis(Elsevier Ltd, 2021) Canberk Ünal; Emin Açıkkalp; David Borge-Diez; A. Hepbasli; Açıkkalp, Emin; Borge-Diez, David; Hepbasli, Arif; Ünal, CanberkWater scarcity and contamination of available water are becoming one of the most complex problems worldwide and they compromise economic development global sustainability and human supply among others. Water is required in almost all human activities and also for planet equilibrium in terms of biodiversity. In this research a new home scaled water desalination plant using a reverse osmosis technology and driven with solar energy is analyzed via extended exergy analysis which is one of the most accurate methods for evaluating both energy performance and sustainability. The proposed system that is presented and analyzed consists of a solar concentrator having 1000 concentrating rate a Photon Enhanced Thermionic Emitter a Dye-Sensitized Solar Cell for the electricity generation and a Reverse Osmosis Desalination Plant (RODP) for water purification using the produced electricity. This system allows water desalination in small scale plants requiring low density energy sources and can produce sustainable water for multiples uses such as domestic use or agricultural among others. The most important results are labor and capital exergy equivalents 42.68 MJ/workhour and 12.09 MJ/Euro respectively and an exergy destruction of 389.700 GJ for all the system annually. The proposed technology can be extended and used in different locations and the Extended Exergy Analysis can be used as a powerful tool for both design and optimization. © 2021 Elsevier B.V. All rights reserved.Article Citation - WoS: 14Citation - Scopus: 11Extended exergy analysis of a novel integrated absorptional cooling system design without utilization of generator for economical and robust provision of higher cooling demands(Elsevier Ltd, 2024) Aslı Tiktaş; Huseyin Gunerhan; A. Hepbasli; Emin Açıkkalp; Acikkalp, Emin; Tiktas, Asli; Hepbasli, Arif; Gunerhan, HuseyinThe focus of this study is on designing a novel system for the provision of high-capacity cooling and heating loads (4000 kW) with the utilization of absorption technology to increase economic viability and COP value of existing cooling plants via lower-grade waste heat sources (70 °C-90 °C). To achieve this aim in the novel system an integration including the LiBr-water solution based absorptional heat transformer (AHT) and absorptional cooling cycle (ACC) and flat plate solar collector (FPSC) systems was proposed. In the integration the utilization of the generator in the cooling cycle was avoided with the interaction of the high-temperature LiBr-water solution (120 °C-150 °C) from the AHT system and ACC system evaporator. In this way both the additional cost of the boiler and heat source and the enhancement of economic viability and COP value were achieved. Energy economic traditional and extended exergy sustainability and environmental analyses were implemented in this novel system. The COP value for the cooling system was determined to be 3.10 from energy analysis. This result forms a significant indicator for achieving of the main focus of the current study with the proposed novel system. The annual heating and cooling duty generations with this novel system were computed as 52.37 GWh and 52.40 GWh respectively. In the context of economically comparing the proposed system to other plants with similar scale that already exist the initial overall expenditure yearly operational expenses and the time it takes to recover the investment for the proposed system were set at $4.56 million $3.12 million and 1.75 years respectively. It is worth noting though that these figures fall within the range of $6–8 million $5–7 million and 5–10 years respectively for the currently operational plants. This result indicated that the proposed system provides a robust alternative to the existing cooling-heating cogeneration systems in terms of main output generation and is more economically viable. Also the novel system gained annually US$3.89 million in energy costs. The conventional exergy analysis results were summarized by forming an exergy flow and loss diagram namely the Grassmann diagram. In addition in this current study the novel extended exergy flow diagram indicating extended exergy content components energy carriers of the proposed system and exergy product rate streams was also proposed and drawn for the proposed system. © 2024 Elsevier B.V. All rights reserved.Article Citation - WoS: 25Citation - Scopus: 26Energy and exergy assessments of a perlite expansion furnace in a plaster plant(Pergamon-Elsevier Science Ltd, 2013) Mert Gürtürk; Hakan Fehmi Oztop; A. Hepbasli; Hepbasli, Arif; Oztop, Hakan F.; Gürtürk, MertIn this study energy and exergy assessments of a perlite expansion furnace in a plaster factory are performed. Chemical properties of the perlite and its application areas are described. Energy and exergy relations according to the First and Second Law of Thermodynamics are derived. Energy and exergy efficiencies losses and exergy destructions are calculated based on the measurements obtained from the system. Evaluations of environmental impact energy management and economic are finally generalized according to the obtained results. Energy and exergy efficiencies of the furnace are determined to be 66% and 26% respectively. Reference temperature effects on exergy efficiency destruction and sustainability index are also presented. The results showed that the furnace has not been well designed in terms of thermal aspects due to high energy and exergy losses and the manufacturer producing the perlite expanded should establish an energy management structure. © 2013 Elsevier Ltd. All rights reserved. © 2013 Elsevier B.V. All rights reserved.Publication Nanoakışkan Kullanılan Sıvı Akışkanlı Güneş Kolektörlerinin Enerji Verimliliği Açısından Karşılaştırılması(2023) Hepbasli, Arif; Gunerhan, Huseyin; Kesen, FıratIn this study, the effects of nanofluids on the energy efficiency of collectors in solar collectors using nanofluids were evaluated. The evaluation was made by considering factors such as different nanofluid types, sizes, concentrations and surfactant usage. The study includes a comprehensive literature study. The effects of nanofluids on the efficiency of the flat-plane collector and parabolic collector are presented in detail in the tables. It has been observed that a significant improvement in energy efficiency can be achieved by using nanofluids with very high thermal conductivity capacity and consequently the ability to increase efficiency instead of standard liquids used in collectors. In this study, it was emphasized that, depending on the detailed research results, it is possible to achieve energy efficiency increases of up to 95% in collector efficiency with the use of appropriate nanofluid.
