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  • Capacity control in Heat Pump systems

    The overall objective of this project is to develop a structured method to approach the challenge of better understanding the techniques and potential for capacity control in Heat pump systems with a focus on Ground Source Heat Pump (GSHP) systems.

  • Digitalization and IoT technologies for Heat Pump systems

    In the last decades digital technologies became widely used in energy end-use sectors and digital solutions have been driving dramatic changes in the society. In the years to come, Heat Pumps will become connected devices participating in the Internet of Things (IoT).

  • 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.

  • Tank to Grave Management of new Low-GWP Refrigerants (Hantering av nya låg-GWP köldmedier från installation till destruktion)

    The project “Tank to Grave Management of new Low-GWP Refrigerants” is a project funded within the Termo program (heating and cooling for future energy systems), the 5th funding call (contributing to a Sustainable Energy System through Heating and Cooling) by the Swedish Energy Agency.

  • Smart Control Strategies for Heat Pump Systems (completed)

    A new perspective for improving the heat pump system performance can be given by the development of enhanced system control strategies able to achieve a considerable increase of the system Seasonal Performance Factor together with a reduction of operation and maintenance costs.

  • Efficient use of energy wells for heat pumps (completed)

    FFSYS2 is a Swedish research program, which started in 2006 until 2010. EFFSYS2 is the continuation of the earlier research programs “Alternativa köldmedier”, “Klimat 21″ and “eff-sys” that were first started back in 1994. These research programs have been very successful and have brought Sweden to the front of international research in the area of refrigeration and heat pumps. Nowadays, Swedish research institutes have a strong international position in the area of refrigeration and heat pump technologies. This position shall be maintained and the research shall continue to develop in cooperation with the industry. This is a step in the switch towards a more sustainable and resource efficient society.

  • Alternative secondary fluids for indirect refrigeration systems

    The secondary fluid is a complex mixture which also contains pH adjusting agents, antioxidants, anti-foaming agents, stabilizers, colorants, etc. These additives can stabilize and improve the fluid performance but also affects the thermophysical properties. Secondary fluid is water-based solutions of organic or inorganic substances (such as alcohols, glycols and salts) used in various indirect refrigeration systems and heat pumps.

  • Environmentally friendly lubricants for high temperature heat pumps with low GWP refrigerants

    This project aims to provide expert knowledge, disseminate findings, and support the development of new POE lubricants in collaboration with leading manufacturers. Given that lubrication plays a critical role in compressor durability, energy efficiency, reliability, and life-cycle cost, attention must be directed towards selecting lubricants compatible with emerging low-GWP synthetic refrigerants.

  • Experimental investigations to maximize efficiency of CO2 vapor compression systems

    CO2 is an environmentally friendly and cost-effective replacement for synthetic refrigerants used in refrigeration and heat pumps systems. Hence, the installation of CO2 refrigeration system is expected to increase in the coming years. In this project, we will experimentally verify methods to maximize the efficiency of CO2 refrigeration systems

  • EcoPack 3

    Synthetic refrigerants with high GWP are being substituted in refrigeration and heat pump systems for highly flammable hydrocarbons. To maintain safety with these fluids it is essential that the charge of refrigerant is low. EcoPack3 is the third in a series of projects where we develop heat pump components and systems with low charge. We have demonstrated the design of a heat pump with 12 kW capacity using only 120g of isobutane as refrigerant. This has been achieved by using very compact heat exchangers and the type of compressors used in electric cars.