Browsing NTNU Open by Author "Gebremedhin, Alemayehu"

A comparison of the performance of mono-Si and poly-Si photovoltaic modules operating under Kosovo climate condition

Komoni, Vjollca; Gebremedhin, Alemayehu; Ibrahimi, Njomza (Journal article; Peer reviewed, 2018)

The performance analysis and evaluation of a real grid-connected photovoltaic (PV) system operating under the mild continental climate condition of Kosovo are conducted in this paper. The PV system is installed on a flat ...

Achieving a Flexible and Sustainable Energy System: The Case of Kosovo

Ibrahimi, Njomza; Gebremedhin, Alemayehu; Sahiti, Alketa (Journal article; Peer reviewed, 2019)

In today’s energy system, the diffusion of renewable-based technologies is accelerating rapidly. Development of mechanisms that support the large-scale deployment of renewables towards global warming and climate change ...

Analysis of Computer Simulation Software’s for Energy Audit in Albania

Dorri, Altin; Alcani, Majlinda; Ziu, Denada; Daci, Enxhi; Gebremedhin, Alemayehu (Peer reviewed; Journal article, 2019)

Energy efficiency is one of the biggest challenges that energy sector is actually facing in Albania. Due to the design and construction of the existing building stock which is not in compliance with the laws and their ...

A case study on solar, wind and hydro energy resource potential of Prizren region in Kosovo

Sarker, Shiplu; Pecani, Goneta; Vula, Dejon; Gebremedhin, Alemayehu (Peer reviewed; Journal article, 2020)

Prizren is a city located in the south part of Kosovo with approximately 90,000 inhabitants and land area of 640 km2. The region is covered with distinct geographical features, that favor penetration and deployment of ...

A case study on solar, wind and hydro energy resource potential of Prizren region in Kosovo

Sarker, Shiplu; Pecani, Goneta; Vula, Dejon; Gebremedhin, Alemayehu (Journal article, 2020-04-24)

Prizren is a city located in the south part of Kosovo with approximately 90,000 inhabitants and land area of 640 km2. The region is covered with distinct geographical features, that favor penetration and deployment of ...

Comparison of the Energy Performance between Flat-plate and Heat Pipe Evacuated Tube Collectors for Solar Water Heating Systems under Mediterranean Climate Conditions

Maraj, Altin; Londo, Andonaq; Firat, Coskun; Gebremedhin, Alemayehu (Journal article; Peer reviewed, 2019)

In this paper, the energy performance of a flat-plate collector and a heat pipe evacuated tube collector exploited for domestic hot water production in the Mediterranean climate is compared. For this purpose, yearly data ...

Data-driven Machine Learning Model in District Heating System for Heat Load Prediction: A Comparison Study

Dalipi, Fisnik; Yildirim, Sule; Gebremedhin, Alemayehu (Journal article; Peer reviewed, 2016)

We present our data-driven supervised machine-learning (ML) model to predict heat load for buildings in a district heating system (DHS). Even though ML has been used as an approach to heat load prediction in literature, ...

District Heating and Cooling Enable Efficient Energy Resource Utilisation

Henning, Dag; Gebremedhin, Alemayehu (Chapter; Peer reviewed, 2012)

Economic development in transition countries, such as China and India, increase global energy use. Therefore, the demand for energy carriers grows, which should increase energy prices. Global energy supply is dominated ...

Energy performance analysis of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector under the Mediterranean climate cond

Maraj, Altin; Londo, Andonaq; Gebremedhin, Alemayehu; Firat, Coskun (Peer reviewed; Journal article, 2019)

This work represents the energy performance analysis during the annual time period of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector having an aperture area of 1.476 m2 ...

Impact of distributed capacitors on voltage profile and power losses in real low voltage distribution networks

Ibrahimi, Njomza; Gebremedhin, Alemayehu; Folkestad, Tor Arne; Norheim, Ian (Chapter, 2018)

Voltage control in low voltage distribution networks continues to remain an issue of significant importance. The large portion of long overhead lines with high R/X ratio has been the main reason that these circuits were ...

Inventar av mulig sertifikatberettiget fornybar kraftproduksjon i innlandet

Gebremedhin, Alemayehu (Høgskolen i Gjøviks rapportserie;3/2013, Research report, 2013)

Det globale energisystem er i dag helt avhengig av fossile energikilder som er uttømmelig til sin natur og samtidig kjent for ligge bak en hel del miljøproblemer. En gradvis overgang til et bærekraftig energisystem som ...

Miljøvennlige tjenestebiler i Gjøvik kommune – Kartlegging av eksisterende bilpark, og analyse av alternative el- og hybridbiler

Hogseth, Hanne Lundberg; Fosnes, Line (Bachelor thesis, 2016-09-27)

I denne bacheloroppgaven har vi tatt for oss tjenestebiler under 3,5 tonn i Gjøvik kommunes driftsenheter. Vi undersøkte om dagens el- og hybridbiler kan dekke behovene til driftsenhetene i Gjøvik kommune, og samtidig føre ...