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

Energy Efficiency and Systems, Department of Mechanical Engineering

Influence of installation of displacement ventilation diffusers above occupied zone on the vertical temperature gradient in simulated office rooms

Publishing year: 2019
Energy Efficiency and Systems, Department of Mechanical Engineering

Design Parameter Modeling of Solar Power Tower System Using Adaptive Neuro-Fuzzy Inference System Optimized with a Combination of Genetic Algorithm and Teaching Learning-Based Optimization Algorithm

Publishing year: 2019 Journal of Cleaner Production
Department of Mechanical Engineering, Energy Efficiency and Systems

Design and validation of an airflow management system in data center with tilted server placement

Publishing year: 2019 Applied Thermal Engineering
Energy Efficiency and Systems, Department of Mechanical Engineering

Heat Transfer Modeling of a Parabolic Trough Solar Collector with Working Fluid of Fe3O4 and CuO/Therminol 66 Nanofluids under Magnetic Field

Publishing year: 2019 Applied Thermal Engineering
Energy Efficiency and Systems, Department of Mechanical Engineering

Thermal adaptation of the elderly during summer in a hot humid area: Psychological, behavioral, and physiological responses

Publishing year: 2019 Energy and Buildings
Energy Efficiency and Systems, Department of Mechanical Engineering

Towards positive energy communities at high latitudes

Publishing year: 2019 Energy Conversion and Management
Energy Efficiency and Systems, Department of Mechanical Engineering

Energy Modelling of a Solar Dish/Stirling by Artificial Intelligence Approach

Publishing year: 2019 Energy Conversion & Management
Energy Efficiency and Systems, Department of Mechanical Engineering

Performance Improvement of a Double Pipe Heat Exchanger Proposed in a Small-Scale CAES System: An Innovative Design

Publishing year: 2019 Applied Thermal Engineering
Energy Efficiency and Systems, Department of Mechanical Engineering

Hood performance and capture efficiency of kitchens

Publishing year: 2019 Building and Environment
Energy Efficiency and Systems, Department of Mechanical Engineering

Cost optimal energy performance renovation measures in a municipal service building in a cold climate

Publishing year: 2019
More information on our research in the Research database.
Research database

Research group members

Elnaz Abdollahi

Department of Mechanical Engineering
Doctoral Candidate
Henrik Holmberg

Henrik Holmberg

Department of Mechanical Engineering
Senior University Lecturer
Janne Hirvonen

Janne Hirvonen

Department of Mechanical Engineering
Postdoctoral Researcher
Juha Jokisalo

Juha Jokisalo

Department of Mechanical Engineering
Senior Scientist
Kari Alanne

Kari Alanne

Department of Mechanical Engineering
Senior University Lecturer
Risto Kosonen

Risto Kosonen

Department of Mechanical Engineering
Professor (Associate Professor)
Kai Siren

Kai Siren

Department of Mechanical Engineering
Senior Advisor

Ville Olkkonen

Department of Mechanical Engineering
Postdoctoral Researcher
Jukka V. Paatero

Jukka V. Paatero

Department of Mechanical Engineering
Senior University Lecturer
Hassam Rehman

Hassam Rehman

Department of Mechanical Engineering
Postdoctoral Researcher
Risto Lahdelma

Risto Lahdelma

Department of Mechanical Engineering
Professor
Sami Lestinen

Sami Lestinen

Department of Mechanical Engineering
Postdoctoral Researcher
Sanna Syri

Sanna Syri

Department of Mechanical Engineering
Professor
Timo Laukkanen

Timo Laukkanen

Department of Mechanical Engineering
Staff Scientist

Haichao Wang

Department of Mechanical Engineering
Academy Postdoctoral Researcher
Rebecka Rikkas

Rebecka Rikkas

Department of Mechanical Engineering
Doctoral Candidate

Natalia Lastovets

Department of Mechanical Engineering
Doctoral Candidate

Weixin Zhao

Department of Mechanical Engineering
Doctoral Candidate

Markku Virtanen

Department of Mechanical Engineering
Professor of Practice
Ali Khosravi

Ali Khosravi

Department of Mechanical Engineering
Postdoctoral Researcher

Johannes Einolander

Department of Mechanical Engineering
Doctoral Candidate

Anahita Farsaei

Department of Mechanical Engineering
Doctoral Candidate
Oleg Todorov Radoslavov

Oleg Todorov Radoslavov

Department of Mechanical Engineering
Doctoral Candidate

Davor Stjelja

Department of Mechanical Engineering
Doctoral Candidate
Behnam Talebjedi

Behnam Talebjedi

Department of Mechanical Engineering
Doctoral Candidate
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