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

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
Tesfay, Asfafaw Haileselassie; Kahsay, Mulu Bayray; Geleta, Abenezer Bekele. (2024) Improved Cook Stoves to Meet Sustainable Development Goal in Ethiopia. Energies
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
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, 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; 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 lecture

Hailu, 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

Poster

Nydal, 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

Poster

Tesfay, 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
Lecture

Tesfay, 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
Interview

Torheim, 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
Interview

Torheim, 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

Lecture

Mahmud, 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
Lecture

Kahsay, 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
Lecture

Tesfay, 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
Lecture

Tesfay, 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

Språkvelger

Asfafaw Haileslassie Tesfay