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.

Latest publications

Department of Mechanical Engineering, Energy Conversion, Energy Efficiency and Systems

Mass flow controlled district heating with an extract air heat pump in apartment buildings: A practical concept study

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

An Artificial Intelligence Approach for Thermodynamic Modeling of Geothermal Based-Organic Rankine Cycle Equipped with Solar System

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

Computational comparison of a novel decentralized photovoltaic district heating system against three optimized solar district systems

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

The possible role of modular nuclear reactors in district heating

Publishing year: 2019 Energies
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

Airflow uniformity optimization for modular data center based on the constructal T-shaped underfloor air ducts

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

Experimental Investigation of Pressure Drop during Two-Phase Flow of R1234yf in Smooth Horizontal Tubes with Internal Diameters of 3.2 mm to 8.0 mm

Publishing year: 2019 INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Energy Efficiency and Systems, Department of Mechanical Engineering

Experimental and numerical investigation of an airflow management system in data center with lower-side terminal baffles for servers

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

Parametric study of geothermal parallel flow double-effect water-LiBr absorption chiller

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

Thermodynamic analysis of geothermal series flow double-efffect water/LiBr absorption chiller

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
Kristo Helin

Kristo Helin

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

Lassi Heikari

Department of Mechanical Engineering
Research Assistant

Tiia Kukkola

Department of Mechanical Engineering
Research Assistant

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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