Department of Mechanical Engineering

Energy Efficiency and Systems

Energy efficiency plays a key role in solving challenges related to developing a sustainable future for human societies, highlighting the need to optimise energy systems of all sizes.
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In the Energy Efficiency and Systems research group, research is focused on energy generation and energy consumption systems. The scale of these systems ranges from single buildings to industrial energy systems and continental energy networks.

Despite the variety of application areas, common research methods provide opportunities for close cooperation between the group's researchers, thus providing the base of knowledge needed for top-level research. This knowledge base also provides possibilities for international research cooperation.

Efficient energy use and indoor climate in buildings, energy- and material-efficient technologies, process concepts and process integration in industry, and optimal energy systems of communities are the key research knowledge in the group. The basis of the research is in the increasing complexity of energy systems and the need to reduce their environmental impact.

The main research tools are different types of analysis, simulation and optimisation methods used in computer software and programs. These computer programs include both leading commercial software and programs created by the group. Experimental methods are also used, focusing on efficient integration of renewable energy in buildings, on drying technology and on measuring the indoor-air quality and performance of energy systems in buildings.

The societal and economic impact of energy technologies is studied by applying system analysis tools to search for ways to integrate renewable energy and to reduce greenhouse gas emissions in energy systems of both industrialised countries like Finland and developing countries. The tools that are utilised include life-cycle approaches, carbon footprint calculation, (primary) energy efficiency analysis, exergy analysis, production simulation and multi-objective optimisation, GIS analysis, investment analysis as well tools for multicriteria decision making. Research is done within national Finnish research programs, the EU’s Horizon programme and in other international research programmes.

The group also studies large transformations of energy systems to reach carbon-neutrality. Medium- and long-term energy system transformations are studied with energy system models, such as EnergyPLAN and EnergyPRO as well as in-house models of electricity markets and demand-side management. The focus of research is on modelling and exploring future developments of national energy systems, city-level heating systems and international electricity markets.

Latest publications

Social acceptability of using low carbon building: a survey exploration

Sadaf Alam, Md.Munjur E. Moula, Risto Lahdelma 2020 International Journal of Sustainable Energy

Rakennusten sisä- ja ulkoilman välisen staattisen paine-eron tavoitetaso

Marko Björkroth, Lari Eskola, Juha Vinha, Risto Kosonen 2020 Sisäilmastoseminaari 2020

Energy and Economic Analysis of Flash Steam Geothermal Power Plants in Lebanon

Mamdouh El Haj Assad, Mohammad AlShabi, Ali Khosravi, Abir Hamida, Zafar Said 2020

Rakennusten paine-erojen mittausohje

Lari Eskola, Marko Björkroth, Risto Kosonen, Juha Vinha 2020 Sisäilmastoseminaari 2020

Implications of carbon price paths on energy security in four Baltic region countries

Arvydas Galinis, Linas Martišauskas, Jaakko Jääskeläinen, Ville Olkkonen, Sanna Syri, Georgios Avgerinopoulos, Vidas Lekavičius 2020 Energy Strategy Reviews

Applications of refrigerant R1234yf in heating, air conditioning and refrigeration systems: A decade of researches

Juan Jose Garcia Pabon, Ali Khosravi, J.M. Belman-Flores, Luiz Machado, Rémi Revellin 2020 International Journal of Refrigeration

Modeling and energy analysis of a linear concentrating photovoltaic system cooled by two-phase mechanical pumped loop system

Juan Jose Garcia Pabon, Ali Khosravi, Mohammad Malekan, Oscar R. Sandoval 2020 Renewable Energy

The effect of deep energy retrofit on the hourly power demand of Finnish detached houses

Janne Hirvonen, Juha Jokisalo, Risto Kosonen 2020 Energies
More information on our research in the Research database.
Research database

Research group members

Sami Lestinen

Mechanical Engineering

Yuchen Ju

Doctoral candidate
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