Department of Mechanical Engineering

Research in thermal sciences

Industrial Energy Systems

The research is focused on the optimization of industrial energy systems by application of thermodynamic models and exergy analysis in combination with thermoeconomics. Focus is on the extension of process integration to not only cover heat exchanger networks.

Applications are e.g., brewing, pulp and paper and dairy industry.

Heat pumps, Combined heat and Power and optimal heat supply

Heat pumps may be applicable for high-efficient heat supply in an energy system based on renewable energy sources as solar and wind with minimal use of thermal power stations based on fossil fuels or biomass. But in the current, modern energy system state-of-the-art heat pumps are not competitive with optimized combined heat and power production. Focus of the research is the best possible heat supply system in current and future energy systems, including working media, heat products and storage of thermal energy.

Refrigeration systems

Refrigeration for food conservation, comfort cooling and other applications is a significant consumer of electricity.  Research focuses on minimization of consumption and integration with other energy consumptions.

Exergy analysis

Exergy analysis and thermoeconomics as well diagnosis based on these methods is studied with focus on refrigeration and heat supply and storage of intermittent, renewable energy sources.


Simulation and modelling

Development of models for the analysis of thermal plants ranging from biomass systems to compressed air energy storage (CAES) and heat pump and refrigeration plants. Models are developed in DNA and EES for solution of steady state and dynamic problems.

The tool DNA has been developed since 1988 and I have been involved in the work since 1995. DNA is a component-based simulator for thermal systems that is applicable for steady state and dynamics as well as exergy analysis. It is generally applicable to thermal systems with large component library and fluid property data base. DNA may be extended by adding components to the library and is freely available.

Last updated 09.01.2012