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Academician

MEHMET DİREK

Profesör

Yalova Üniversitesi Mühendislik Fakültesi Enerji Sistemleri Mühendisliği Bölümü

Research topics OpenAlex
  1. Ana Dal Mühendislik Temel Alanı
  2. Yan Dal Makine Mühendisliği
Keywords YÖKSİS
Articles 36 YÖKSİS 36 · OpenAlex 0 Total citations 418 h-index 13 · OpenAlex OpenAlex coverage %86 matched 31 / 36 Q1 articles 9 Scopus · WoS Q1 8 Best field rank #10 / 72 Keyword · top 13.9% Co-authors 27 3 Turkish institutions

Citation impact

Citation counts of the articles matched in OpenAlex, citing publications from Crossref and the Stanford/Elsevier list. Sources are shown separately and never added up.

OpenAlex YÖKSİS articles matched in OpenAlex: 31 + YÖKSİS · co-author record: 2
h-index 13 Percentile in Türkiye: 89 #26 of 587 at their university by h-index
i10-index
13
Total citations
418
Top 15% in Türkiye
Per article
12.7
FWCI
0.82
1.00 = world average
World top 1%
0
World top 10%
2

Most cited articles

  1. Performance evaluation of an integrated automotive air conditioning and heat pump system 2006 118 citations
  2. Experimental performance evaluation of the dual-evaporator ejector refrigeration system using environmentally friendly refrigerants of R1234ze(E), ND, R515a, R456a, and R516a as a replacement for R134a 2022 world top 10% 36 citations
  3. Performance evaluation of an R134a automotive heat pump system for various heat sources in comparison with baseline heating system 2015 world top 10% 29 citations
How is this computed?

h-index and citations are computed from the citation counts of this academic’s YÖKSİS articles matched in OpenAlex (not Google Scholar, WoS or Scopus). Unmatched articles are not included. 2 articles (19 citations) tagged with this academic’s YÖK author id in co-authors’ YÖKSİS records count only towards citations, h-index and i10; article counts, percentiles and rankings use their own YÖKSİS list.

Citing publications Crossref 44 publications citing 33 DOI-bearing articles · 12 Türkiye-affiliated
  • 2017 1
  • 2019 8
  • 2020 14
  • 2021 16
  • 2022 4
  • 2026 1
  1. DOI 10.1016/j.icheatmasstransfer.2025.110096 2026
  2. DOI 10.1016/j.enconman.2021.115092 2022
  3. DOI 10.1016/j.ijrefrig.2022.03.024 2022
  4. DOI 10.1016/j.tsep.2022.101235 2022
  5. DOI 10.1016/j.applthermaleng.2021.117914 2022
  6. Energetic and exergetic performance comparison of an experimental automotive air conditioning system using refrigerants R1234yf and R134a TR Alpaslan ALKAN et al. · Journal of Thermal Engineering · 2021 · cites 2 articles of this academic
  7. Experimental performance evaluation of an R1234yf automobile air conditioning system employing an internal heat exchanger TR Umut GÜNGÖR et al. · International Journal of Automotive Engineering and Technologies · 2021 · cites 4 articles of this academic
  8. Volumetric Efficiency Evaluation of the Use of Refrigerants R445a, R515a, R456a, ND, and R516a with Low GWP Instead of R134a TR Ümit İŞKAN et al. · Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi · 2021 · cites 3 articles of this academic
  9. Otomobil İklimlendirme Sistemlerinde Farklı Soğutucu Akışkan Kullanılmasında Kompresörün Hacimsel Verim Analizi TR Ümit İŞKAN et al. · International Journal of Pure and Applied Sciences · 2021 · cites 2 articles of this academic
  10. Enerji Depolamalı Bir Boruda Nanoakışkan Kullanımının Isıl Performansa Etkisinin Sayısal Olarak İncelenmesi TR Eda BAKIR et al. · International Journal of Pure and Applied Sciences · 2021
  11. DOI 10.1016/j.enconman.2021.114145 2021
  12. DOI 10.1109/icesc51422.2021.9532643 2021
  13. DOI 10.1016/j.csite.2021.101344 2021
  14. DOI 10.1016/j.ijheatmasstransfer.2021.121162 2021
  15. DOI 10.1016/j.ecmx.2021.100095 2021
  16. DOI 10.1016/j.jclepro.2021.129754 2021
  17. DOI 10.1007/s11431-020-1765-3 2021
  18. DOI 10.1007/s11630-021-1458-8 2021
  19. DOI 10.1088/1742-6596/2054/1/012064 2021
  20. DOI 10.1016/j.seta.2021.101527 2021
  21. DOI 10.1016/j.ijrefrig.2020.10.039 2021
  22. Performance evaluation of an automotive air conditioning and heat pump system using R1234yf and R134a TR Mumin Celil Aral et al. · Science and Technology for the Built Environment · 2020 · cites 3 articles of this academic
  23. Experimental assessment of the retrofit of an internal heat exchanger in refrigeration systems: The effect on energy performance and system operation TR Vedat Oruç et al. · Applied Thermal Engineering · 2020
  24. Experimental energy and exergy performance of an automotive heat pump using R1234yf TR Alpaslan Alkan et al. · Journal of Thermal Analysis and Calorimetry · 2020 · cites 2 articles of this academic
  25. DOI 10.3390/en13205440 2020
  26. DOI 10.1016/j.renene.2020.01.075 2020
  27. DOI 10.1109/tvt.2020.2988468 2020 · cites 2 articles of this academic
  28. DOI 10.1016/j.csite.2020.100800 2020 · cites 2 articles of this academic
  29. DOI 10.1021/acs.energyfuels.0c02661 2020
  30. DOI 10.1016/j.energy.2019.116751 2020

Showing the 30 most recent.

Where does this list come from?

Extracted from the reference lists in Crossref’s public March 2026 data file; 20.3% of the file has been processed, so the list may be incomplete. Crossref citations are never added to or compared with the OpenAlex citation counts; the two sources have different coverage.

Field ranking

Position in the main-field, side-field and keyword cohorts by YÖKSİS article score; each card opens that ranking.

YÖKSİS ?
Keyword rankings 3

Works 36

YÖKSİS and OpenAlex records: index distribution, journals published in, a filterable article list and the other output types.

Indexes and citation percentiles

?
TR Index 11 articles
OpenAlex citation percentile
Top 1%0
Top 10%2
Avg · n 31 %53.9
Other counts

Scopus (SJR)

  • YÖKSİS rows 24

WoS (JCR)

  • YÖKSİS rows 24

Articles

Articles with YÖKSİS and OpenAlex source split; narrow by quartile or TR Index.

36articles

Journals with publications

26 journals

Narrow down

Scopus (SJR)
Q19 Q210 Q35 Q40
WoS (JCR)
Q18 Q20 Q312 Q44
TR Index
11articles

Article list

  1. 2026 Experimental performance and exergy analysis of a net-zero energy heat pump drying system integrated with photovoltaics and carbon fiber film heaters Energy Conversion and Management DOI 10.1016/j.enconman.2026.121632 YÖKSİS SJR Q1 JCR Q1
  2. 2026 Analysis of isentropic efficiencies of ejector components in dual-evaporator refrigeration systems using CFD and experiments Journal of Thermal Engineering DOI 10.47481/jten.0062 YÖKSİS TR Index SJR Q3 JCR Q3
  3. 2025 Experimental investigation on the effect of expansion valves in a dual evaporator ejector refrigeration system using R134a and R456a Energy Sources, Part A: Recovery, Utilization, and Environmental Effects DOI 10.1080/15567036.2021.1982076 YÖKSİS SJR Q2 JCR Q3 OpenAlex 63.6%
  4. 2024 Drying kinetics of nectarine slices in a heat pump drying system Energy Sources, Part A: Recovery, Utilization, and Environmental Effects DOI 10.1080/15567036.2023.2298009 YÖKSİS SJR Q2 JCR Q3 OpenAlex 72.7%
  5. 2024 Exergetic, sustainability and exergoeconomic analyses of a fully photovoltaic-powered heat pump tumble dryer Renewable Energy DOI 10.1016/j.renene.2024.120274 YÖKSİS SJR Q1 JCR Q1 OpenAlex 81.3%
  6. 2024 Experimentally Performance Evaluation of a Dual Evaporator Ejector Refrigeration System with Diffuser Outlet Split Configuration under Varied Compressor Inlet Pressures Hittite Journal of Science and Engineering DOI 10.17350/HJSE19030000331 YÖKSİS TR Index OpenAlex 6.3%
  7. 2024 Comparative evaluation of experimental ejector refrigeration system for different operating configurations Journal of Thermal Engineering DOI 10.18186/thermal.1448602 YÖKSİS TR Index SJR Q3 JCR Q4 OpenAlex 1.7%
  8. 2023 Experimental performance analysis of ejector heat pump water heater under transient conditions Science and Technology for the Built Environment DOI 10.1080/23744731.2023.2193117 YÖKSİS SJR Q2 JCR Q3 OpenAlex 44.2%
  9. 2023 Comparison of R134a and R516A’s Performance at Different Air Velocities in Two Evaporator Ejector Cooling System Hitit University DOI 10.17350/HJSE19030000293 YÖKSİS TR Index OpenAlex 38.8%
  10. 2023 Investigation of the three-phase heat pump drying systems impact on power quality of the electrical grid International Journal of Energy Studies DOI 10.58559/ijes.1363503 YÖKSİS TR Index OpenAlex 42.5%
  11. 2023 R515A soğutucu akışkanlı tek kompresör ve iki buharlaştırıcılı deneysel soğutma sisteminde ejektör sürüklenme oranının ve yoğuşma sıcaklığının performans parametrelerine etkisinin incelenmesi Yenilikçi Mühendislik ve Doğa Bilimleri DOI 10.29228/JIENS.66276 YÖKSİS TR Index OpenAlex 3.7%
  12. 2023 Performance analysis of dual-evaporator ejector refrigeration system in different configurations: Experimental investigation International Journal of Energy Studies DOI 10.58559/ijes.1291259 YÖKSİS TR Index OpenAlex 41.5%
  13. 2022 Evaluation of the impact of the temperature and mass flow rate of the water, utilized in the R516A refrigeration system with dual evaporator and ejector, on the performance parameters Energy Sources, Part A: Recovery, Utilization, and Environmental Effects DOI 10.1080/15567036.2022.2108526 YÖKSİS SJR Q2 JCR Q3 OpenAlex 51.5%
  14. 2022 Drying kinetics and energy-exergy analysis of an experimental heat pump dryer utilized horseshoe heat recovery heat pipes for drying different grapes Thermal Science and Engineering Progress DOI 10.1016/j.tsep.2022.101487 YÖKSİS SJR Q1 JCR Q1 OpenAlex 82.6%
  15. 2022 Evaluation of the effects of entrainment ratios on the performance parameters of a refrigeration machine having dual evaporator ejector system with R134a and R456A Thermal Science and Engineering Progress DOI 10.1016/j.tsep.2022.101345 YÖKSİS SJR Q1 JCR Q1 OpenAlex 76.2%
  16. 2022 Experimental performance evaluation of the dual-evaporator ejector refrigeration system using environmentally friendly refrigerants of R1234ze(E), ND, R515a, R456a, and R516a as a replacement for R134a Journal of Cleaner Production DOI 10.1016/j.jclepro.2022.131612 YÖKSİS SJR Q1 JCR Q1 OpenAlex top 10% OpenAlex 91.0%
  17. 2022 An experimental investigation of ejector employed a dual-evaporator vapor compression refrigeration system under various entrainment ratios using R134a as the refrigerant Sustainable Energy Technologies and Assessments DOI 10.1016/j.seta.2022.102293 YÖKSİS SJR Q1 JCR Q1 OpenAlex 80.3%
  18. 2021 OTOMOBİL İKLİMLENDİRME SİSTEMLERİNDE FARKLI SOĞUTUCU AKIŞKAN KULLANILMASINDA KOMPRESÖRÜN VOLUMETRİK VERİM ANALİZİ International Journal of Pure and Applied Sciences DOI 10.29132/ijpas.881952 YÖKSİS TR Index OpenAlex 41.8%
  19. 2021 Volumetric Efficiency Evaluation of the Use of Refrigerants R445a, R515a, R456a, ND, and R516a with Low GWP Instead of R134a Journal of the Institute of Science and Technology DOI 10.21597/jist.734720 YÖKSİS OpenAlex 50.5%
  20. 2020 Experimental Evaluation of an Automotive Heat Pump System with R1234yf as an Alternative to R134a Arabian Journal for Science and Engineering DOI http://link.springer.com/10.1007/s13369-019-04140-x YÖKSİS SJR Q2 JCR Q3

Projects 11 See all (11) →

  1. 2023 Ejektör sonrası ayrımlı çift evaporatörlü soğutma sisteminin performans analizi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2023-05-11 – 2024-01-11
  2. 2020 ÇOK FONKSİYONLU PROTOTİP ISI POMPALI ÜZÜM KURUTMA SİSTEMİNİN GELİŞTİRİLMESİ VE ÜRÜN KALİTESİ İLE ENERJİ VERİMLİLİĞİNİN İNCELENMESİ Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2020-09-08 – 2022-03-08
  3. 2024 Sıfır Enerji Yaklaşımıyla Tasarlanan Fotovoltaik Enerji Sistemi ve Karbon Fiber Isıtıcı Entegrasyonlu Isı Pompalı Gıda Kurutma Sisteminin Performans Analizi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2024-07-16 – 2025-10-16
  4. 2020 Soğutma sistemlerinde ejektör kullanımının sistem üzerine etkilerinin araştırılması Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2020-03-04 – 2022-01-18
  5. 2020 Düşük GWP’li soğutucu akışkanların kullanımında Ejektörlü soğutma sisteminin performans analizi Yükseköğretim Kurumları tarafından destekli bilimsel araştırma projesi · Tamamlandı 2020-06-02 – 2022-06-16

Books 5

  1. 2022 Proceedings of the 2022 International Symposium on Energy Management and Sustainability Springer Kitap Bölümü · Bilimsel Kitap
  2. 2018 Exergy for A Better Environment and Improved Sustainability Springer ISBN 978-3-319-62571-3 Kitap Bölümü · Bilimsel Kitap
  3. 2018 Exergy for A Better Environment and Improved Sustainability 1 Springer ISBN 978-3-319-62571-3 Kitap Bölümü · Bilimsel Kitap
  4. 2015 Energy Systems and Management Springer International Publishing ISBN 978-3-319-16024-5 Kitap Bölümü · Bilimsel Kitap
  5. 2014 Progress in Exergy, Energy, and the Environment Springer ISBN 978-3-319-04680-8 Kitap Bölümü · Bilimsel Kitap

Proceedings 38 See all (38) →

  1. 2014 Pompaj Depolamalı Hidroelektrik Santral Uygulanabilirlik Analizi: Cevher Hes Uygulaması ULUSLARARASI ENERJİ VE GÜVENLİK KONGRESİ
  2. 2024 EJEKTÖR ÇIKIŞ AYRIMLI ÇİFT EVAPORATÖRLÜ EJEKTÖRLÜ SOĞUTMA SİSTEMİNİN KONDENSERE GİREN HAVA HIZLARINA GÖRE PERFORMANSININ DEĞERLENDİRİLMESİımlı 5TH INTERNATIONAL BURSA SCIENTIFIC RESEARCHS CONGRESS
  3. 2019 5 TH INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL ENGINEERING IN MOBILE AIR CONDITIONING SYSTEM R32 / R1234YF MIXTURE OF DIFFERENT RATES OF USE EVALUATION OF THE IMPACT ON THE PERFORMANCE OF THE SYSTEM 5TH INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL
  4. 2012 Mesleki Teknik Eğitimde Endüstriye Dayalı Öğretimin (Staj) Öğrenci Açısından İrdelenmesi: Yalova Myo İklimlendirme Ve Soğutma Teknolojisi Programı Örneği 1. Ulusal İklimlendirme ve Soğutma Eğitimi Sempozyumu İKSES’12
  5. 2005 Isı Pompası Olarak Çalışabilen Bir Otomobil Klimasının Deneysel Analizi ULIBTK’05 15. Ulusal Isı Bilimi ve Tekniği Kongresi

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Collaboration network

From the author lists of YÖKSİS publication records. Duplicate records of a work count once; institutions are co-authors’ current YÖKSİS affiliations.

Co-authors
27
With an akaturk profile
17
Turkish institutions
3
Co-authored works
%100

Academic co-authors 17

  1. ÜMİT İŞKAN Öğretim Görevlisi (ders Vermekle Görevli) · Yalova Üniversitesi same university 14
  2. FİKRET YÜKSEL Profesör · Yalova Üniversitesi same university 11
  3. CÜNEYT TUNÇKAL Doçent · Yalova Üniversitesi same university 9
  4. MAHMUT CÜNEYT KAHRAMAN Doktor Öğretim Üyesi · Yalova Üniversitesi same university 6
  5. MEHMET SELÇUK MERT Profesör · Yalova Üniversitesi same university 5
  6. MURAT HOŞÖZ Profesör · Kocaeli Üniversitesi 3
  7. SUNAY TÜRKDOĞAN Profesör · Yalova Üniversitesi same university 3
  8. İBRAHİM DOYMAZ Profesör · Yıldız Teknik Üniversitesi 2
  9. AHMET YÜKSEL Doçent · Yalova Üniversitesi same university 1
  10. ALİ TÜRKCAN Profesör · Kocaeli Üniversitesi 1
Show all (17)
  1. ARİF ATAK Profesör · Bursa Uludağ Üniversitesi 1
  2. CEMİL KOYUNOĞLU Doktor Öğretim Üyesi · Yalova Üniversitesi same university 1
  3. ERTAN ALPTEKİN Profesör · Kocaeli Üniversitesi 1
  4. HALİL ATALAY Profesör · Yalova Üniversitesi same university 1
  5. KADRİ SÜLEYMAN YİĞİT Profesör · Kocaeli Üniversitesi 1
  6. MEHMET EKREM ÇAKMAK Doktor Öğretim Üyesi · Yalova Üniversitesi same university 1
  7. MUSTAFA ÇANAKCI Profesör · Kocaeli Üniversitesi 1

National collaboration 3 institutions

Within own university28 joint works · Yalova Üniversitesi

  1. Kocaeli Üniversitesi 3 works · 5 academics
  2. Yıldız Teknik Üniversitesi 2 works · 1 academics
  3. Bursa Uludağ Üniversitesi 1 works · 1 academics

Other co-authors (incl. international) 10

Alper Keleşoğlu 4Batuhan ÜĞÜDÜR 4EREN SOYLU 3Gizem Çetin 2ahmet akın 2ALİ ŞANLICansu yılmazERGİN BAYRAKMehmet Harun SökücüZEKİYE GÖKSEL

Authors without an akaturk profile (international researchers, retired or former academics, students, clinicians) are grouped by name spelling; short forms such as “Gulluce M.” join the single full name they match.