Asfafaw Haileslassie Tesfay
About
I am a mechanical engineer with a PhD from the Norwegian University of Science and Technology, specialized in solar energy conversion to thermal energy through technology development on collection, transportation, storage, and application. My research focuses on renewable energy including but not limited to solar, hydropower, wind, bioenergy, off-grid electrification, power plant operation and maintenance, energy auditing and optimization, and technology development. I developed extensive experience in academia with strong communication skills as shown in https://scholar.google.com/citations?hl=en&user=UgKyfm4AAAAJ&view_op=list_works&sortby=pubdate
Research
Current Research topic: Transient Management and hydropower Flexibility
Research topics:
Hydropower (technologies, development and performance)
Clean cooking using renewable energy (solar thermal, biomass, electric and biogas)
Solar thermal applications (cooking, heating, drying)
off grid electrification
Publications
2025
-
Assefa, Ephrem Yohannes;
Tesfay, Asfafaw Haileselassie.
(2025)
Effect of Blade Number on Internal Flow and Performance Characteristics in Low-Head Cross-Flow Turbines.
Energies
Academic article
-
Gebremariam, Filmon Tquabo;
Tesfay, Asfafaw Haileselassie;
Sigtryggsdottir, Fjola Gudrun;
Goitom, Haddush;
Lia, Leif.
(2025)
Overtopping-Induced Embankment Breaching Experiments: State-of-the-Art Review on Measurement and Instrumentation.
Water
Academic literature review
-
Tesfay, Asfafaw Haileselassie;
Lia, Leif;
Vereide, Kaspar Vatland.
(2025)
Composite surge tanks to boost hydropower flexibility.
Renewable Energy
Academic article
2024
-
Tesfay, Asfafaw Haileselassie;
Gebreslassie, Mulualem G.;
Lia, Leif.
(2024)
Sustainability challenges of hydropower and its implication on Ethiopia’s economy.
International Journal of Sustainable Engineering
Academic article
-
Tesfay, Angesom Gebrezgabiher;
Tesfay, Asfafaw Haileselassie;
Adaramola, Muyiwa S..
(2024)
Quantifying Agricultural Residues Biomass Resources and the Energy Potentials with Characterization of Their Nature and Ethiopian Case Consumption Inference.
Energies
Academic article
-
Tesfay, Asfafaw Haileselassie;
Kahsay, Mulu Bayray;
Geleta, Abenezer Bekele.
(2024)
Improved Cook Stoves to Meet Sustainable Development Goal in Ethiopia.
Energies
Academic article
-
Hailu, Mesele Hayelom;
Kahsay, Mulu Bayray;
Tesfay, Asfafaw Haileselassie;
Nydal, Ole Jørgen.
(2024)
An Experimental Comparative Study of Large-Sized Direct Solar Fryers for Injera Baking Applications.
Energies
Academic article
2015
-
Tesfay, Asfafaw Haileselassie;
Goel, V.K..
(2015)
Analysis of semi-active vehicle suspension system using airspring and MR damper.
IOP Conference Series: Materials Science and Engineering
Academic article
-
Tesfay, Asfafaw Haileselassie;
Hagos, Ftwi Yohannes;
Yohannes, Kiros G.;
Nydal, Ole Jørgen;
Kahsay, Mulu Bayray.
(2015)
Preparing side charging of PCM storage: Theoretical and experimental investigation.
IOP Conference Series: Materials Science and Engineering
Academic article
-
Tesfay, Asfafaw H.
(2015)
Experimental Investigation of a Concentrating Solar Fryer
with Heat Storage.
Doktoravhandlinger ved NTNU (60)
Doctoral dissertation
2014
-
Tesfay, Asfafaw H;
Kahsay, Mulu Bayray;
Nydal, Ole Jørgen.
(2014)
Design and Development of Solar Thermal Injera Baking: Steam Based Direct Baking.
Energy Procedia
Academic article
-
Tesfay, Asfafaw H;
Kahsay, Mulu Bayray;
Nydal, Ole Jørgen.
(2014)
Solar Powered Heat Storage for Injera Baking in Ethiopia.
Energy Procedia
Academic article
-
Mahmud, Anwar Mustefa;
Kahsay, Mulu Bayray;
Tesfay, Asfafaw H;
Hagos, Ftwi Yohannes;
Gebray, Petros;
Kelele, Hailay Kiros.
(2014)
Solar energy resource assessment of the geba catchment, Northern Ethiopia.
Energy Procedia
Academic article
-
Tesfay, Asfafaw H;
Nydal, Ole Jørgen;
Kahsay, Mulu Bayray.
(2014)
Energy storage integrated solar stove: A case of solar Injera baking in Ethiopia.
IEEE conference proceedings
Academic chapter/article/Conference paper
2013
-
Kahsay, Mulu B;
Tesfay, Asfafaw H;
Mahmud, Anwar Mustefa;
Kelele, Hailay Kiros;
Enday, Petros Gebray;
Hayelom, Messele.
(2013)
Wind Energy Data Analysis and Resource Mapping of Geba Catchment, North Ethiopia.
Wind Engineering : The International Journal of Wind Power
Academic article
Journal publications
-
Assefa, Ephrem Yohannes;
Tesfay, Asfafaw Haileselassie.
(2025)
Effect of Blade Number on Internal Flow and Performance Characteristics in Low-Head Cross-Flow Turbines.
Energies
Academic article
-
Gebremariam, Filmon Tquabo;
Tesfay, Asfafaw Haileselassie;
Sigtryggsdottir, Fjola Gudrun;
Goitom, Haddush;
Lia, Leif.
(2025)
Overtopping-Induced Embankment Breaching Experiments: State-of-the-Art Review on Measurement and Instrumentation.
Water
Academic literature review
-
Tesfay, Asfafaw Haileselassie;
Lia, Leif;
Vereide, Kaspar Vatland.
(2025)
Composite surge tanks to boost hydropower flexibility.
Renewable Energy
Academic article
-
Tesfay, Asfafaw Haileselassie;
Gebreslassie, Mulualem G.;
Lia, Leif.
(2024)
Sustainability challenges of hydropower and its implication on Ethiopia’s economy.
International Journal of Sustainable Engineering
Academic article
-
Tesfay, Angesom Gebrezgabiher;
Tesfay, Asfafaw Haileselassie;
Adaramola, Muyiwa S..
(2024)
Quantifying Agricultural Residues Biomass Resources and the Energy Potentials with Characterization of Their Nature and Ethiopian Case Consumption Inference.
Energies
Academic article
-
Tesfay, Asfafaw Haileselassie;
Kahsay, Mulu Bayray;
Geleta, Abenezer Bekele.
(2024)
Improved Cook Stoves to Meet Sustainable Development Goal in Ethiopia.
Energies
Academic article
-
Hailu, Mesele Hayelom;
Kahsay, Mulu Bayray;
Tesfay, Asfafaw Haileselassie;
Nydal, Ole Jørgen.
(2024)
An Experimental Comparative Study of Large-Sized Direct Solar Fryers for Injera Baking Applications.
Energies
Academic article
-
Tesfay, Asfafaw Haileselassie;
Goel, V.K..
(2015)
Analysis of semi-active vehicle suspension system using airspring and MR damper.
IOP Conference Series: Materials Science and Engineering
Academic article
-
Tesfay, Asfafaw Haileselassie;
Hagos, Ftwi Yohannes;
Yohannes, Kiros G.;
Nydal, Ole Jørgen;
Kahsay, Mulu Bayray.
(2015)
Preparing side charging of PCM storage: Theoretical and experimental investigation.
IOP Conference Series: Materials Science and Engineering
Academic article
-
Tesfay, Asfafaw H;
Kahsay, Mulu Bayray;
Nydal, Ole Jørgen.
(2014)
Design and Development of Solar Thermal Injera Baking: Steam Based Direct Baking.
Energy Procedia
Academic article
-
Tesfay, Asfafaw H;
Kahsay, Mulu Bayray;
Nydal, Ole Jørgen.
(2014)
Solar Powered Heat Storage for Injera Baking in Ethiopia.
Energy Procedia
Academic article
-
Mahmud, Anwar Mustefa;
Kahsay, Mulu Bayray;
Tesfay, Asfafaw H;
Hagos, Ftwi Yohannes;
Gebray, Petros;
Kelele, Hailay Kiros.
(2014)
Solar energy resource assessment of the geba catchment, Northern Ethiopia.
Energy Procedia
Academic article
-
Kahsay, Mulu B;
Tesfay, Asfafaw H;
Mahmud, Anwar Mustefa;
Kelele, Hailay Kiros;
Enday, Petros Gebray;
Hayelom, Messele.
(2013)
Wind Energy Data Analysis and Resource Mapping of Geba Catchment, North Ethiopia.
Wind Engineering : The International Journal of Wind Power
Academic article
Part of book/report
-
Tesfay, Asfafaw H;
Nydal, Ole Jørgen;
Kahsay, Mulu Bayray.
(2014)
Energy storage integrated solar stove: A case of solar Injera baking in Ethiopia.
IEEE conference proceedings
Academic chapter/article/Conference paper
Report
-
Tesfay, Asfafaw H.
(2015)
Experimental Investigation of a Concentrating Solar Fryer
with Heat Storage.
Doktoravhandlinger ved NTNU (60)
Doctoral dissertation
Teaching
I have taught:
- Experimental methods
- Research methods
- Advanced heat transfer
- solar energy (PV & thermal)
- Experimental Methods for Engineers
- Thermal System Modeling
- power generation
- Machine Design (I&II)
- Vibration
- Materials Handling Equipment
- Mechatronoics
- Fluid power system
- Thermodynamics
- Machine Technology (I & II)
- Engineering Mechanics
- Engineering Drawing
Supervision
Supervision:
PhD theses Supervion:
- Hydraulic scale modeling of a Pressurized Sedment ladend flow
- Dam Safety Risk and Mitigation of Embankment dams: The Case of Zarema Rockfill dam, Northern Ethiopia.
- Characterization of Biomass Composition and kinetics: Investigation for combustion and gasification.
- Comparative optimization of computational and experimental study of Cross Flow Hydraulic Turbine.
- Experimental and numerical investigation of direct and indirect heat transportation in a concentrated solar energy system
MSc theses Spervision:
- I have supervised more than twenty seven theses
BSc theses Supervion:
- I have supervised seven theses
Outreach
2017
-
Academic lectureHailu, Mesele Hayelom; Nydal, Ole Jørgen; Kahsay, Mulu B; Tesfay, Asfafaw Haileselassie. (2017) A direct solar fryer for injera baking application. ISES Solar World Congress 2017 , Abu Dhabi 2017-10-29 - 2017-11-02
2015
-
PosterNydal, Ole Jørgen; Tesfay, Asfafaw Haileselassie. (2015) Ray Tracing for Evaluation of the SK14 Solar Concentrator as a Solar Fryer. ISES Solar World Congress 2015 , Daegu 2015-11-09 - 2015-11-12
2014
-
PosterTesfay, Asfafaw Haileselassie; Nydal, Ole Jørgen; Kahsay, Mulu B. (2014) Storage integrated solar stove and its perspectives in Ethiopia. Renewable Energy Research Conference, 2014 2014-06-16 - 2014-06-18
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LectureTesfay, Asfafaw Haileselassie; Nydal, Ole Jørgen; Kahsay, Mulu B. (2014) Solar energy for Sustainable energy and climate security. Sustainable Land and Watershed Management (SLWM) Conference, 2014 2014-05-26 - 2014-05-27
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InterviewTorheim, Maria Gilje; Tesfay, Asfafaw H; Larsen, Even Sønnik Haug; Hæreid, Mari; Vendrig, Sebastian; Haneberg, Dag Håkon. (2014) Kan bake mat på solstrålar. Gemini Gemini [Journal] 2014-01-10
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InterviewTorheim, Maria Gilje; Tesfay, Asfafaw H; Larsen, Even Sønnik Haug; Hæreid, Mari; Vendrig, Sebastian; Haneberg, Dag Håkon. (2014) Vil bake etiopisk brød med solstrålar. Bistandsaktuelt Bistandsaktuelt [Internet] 2014-01-10
2013
-
LectureMahmud, Anwar Mustefa; Tesfay, Asfafaw H; Kahsay, Mulu B; Enday, Petros Gebray; Kelele, Hailay Kiros; Hagos, Ftwi Yohannes. (2013) Solar Energy Resource Assessment of the Geba Catchment, Northern Ethiopia. International Solar Energy Society Conference , Cancun 2013-11-03 - 2013-11-07
-
LectureKahsay, Mulu B; Tesfay, Asfafaw H; Mahmud, Anwar Mustefa; Tesfay, Messeret; Paintin, John; Gebray, Biniam. (2013) Theoretical and Experimental Comparison of Box Solar Cookers with and without Internal Reflector. International Solar Energy Society conference oral presentation , Cancun 2013-11-03 - 2013-11-07
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LectureTesfay, Asfafaw H; Nydal, Ole Jørgen; Kahsay, Mulu Bayray. (2013) Solar powered heat storage for Injera baking in Ethiopia. International Solar Energy Society 2013 ISES Solar World Congress , Cancun 2013-11-03 - 2013-11-07
-
LectureTesfay, Asfafaw H; Nydal, Ole Jørgen; Kahsay, Mulu Byray Kahsay. (2013) Design and development of solar thermal Injera baking: steam based direct baking. International Solar Energy Society 2013 ISES Solar World Congress , Cancun 2013-11-03 - 2013-11-07