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  • Compact Minichannel Latent Energy Storage for Air Related Cold Storage Applications

    Cold storage using cold air in different applications can reduce the energy use and contribute to mitigation of greenhouse gas emissions significantly. Such applications are free cooling in HVAC systems, in automotive evaporators and in refrigeration systems running on floating condensing mode. Latent Thermal energy storage (LTES), employing Phase Change Materials (PCM) as energy storing medium, is a useful technology which can be used to reduce the energy consumption of energy systems. In the storage system, using air and PCM, a compact and robust heat exchanger in terms of energy density and power is highly in demand.

  • Two phase heat transfer & pressure drop with new environment friendly refrigerants in minichannels (completed)

    Two phase heat transfer, pressure drop, mini channel

  • Numerical Study on flow boiling in micro/mini channels (completed)

    The study of micro-channels has attracted more and more attention during the last few decades.

  • Functional surface coatings for energy efficient heat pumps

    This project concerns the frost formation problem on air-source heat pumps (ASHP), which is a common issue in colder climates such as Sweden.

  • Two-phase flow in flat channels

    Refrigeration and heat pump systems today use refrigerants with high global warming potential (GWP). Within the next ten years, these will be substituted by natural and synthetic fluids with low GWP. Such fluids are always flammable and to reduce the connected risks it is important to reduce the charge of refrigerant. To achieve this, heat exchangers with small internal volume are required. New designs of the heat exchangers for low charge can simultaneously give better heat transfer, if the design is done correctly, which will increase the COP.

  • Deep Borehole Heat Exchanger (completed)

    This project aimed to measure advantages and disadvantages of deep borehole heat exchangers as well as to propose design guidelines for multiple borehole fields with coaxial collectors.