100% green Norwegian supermarket to achieve 30% energy savings

By Janet Thompson, Nov 28, 2013, 17:51 2 minute reading

A 100% green REMA1000 supermarket in Norway is expected to reach 30% energy savings using an innovative solution from Danfoss and SINTEF. According to the two companies, the store, which utilises an integrated CO2 system and heat recovery, will be the pilot concept store for REMA1000 grocery stores to be built over the next few years, i.e. technologies demonstrated to perform well in the pilot store will be applied further.

Located in Trondheim, Norway, the REMA 1000 Kroppanmarka supermarket is 100% green, including a green cooling and heating solution created by Danfoss and SINTEF within the CREATIV project. The solution covers cooling, heating, ventilation and air conditioning. The store, which opened in mid-August, 2013, also features green grass on the roof, air curtains at the entrance, four 170 meter-deep energy wells and special panels mounted instead of windows to capture the most efficient use of natural light within the building.

It is an extremely high-tech and integrated CO2 and heat recovery solution, and an innovative project. The basic idea behind the new solution is that the refrigeration system also serves as a heat pump in winter and provides cooling for the air-handling unit in the summer. The surplus heat from the refrigeration system is applied for floor heating, heating up the supply air of the ventilation unit and keeping the pavements snow and ice free during the cold Norwegian winters,” says Dr. Armin Hafner, Senior Research Scientist at SINTEF Energy Research.

Solution details

In a close collaboration with the Norwegian government and the REMA 1000 supermarket chain, Danfoss and SINTEF came up with a solution that should provide 30% energy savings in Norwegian supermarkets by 2020.

  • The solution involves floor heating, ventilation, air condition, snow melting and storage of thermal energy
  • Refrigeration and heat pump functions have been combined, as well as the control of the air handling unit and the various heat storage devices
  • 170 meter deep energy wells obtain free cooling in the summer and provide a heat source for the heat pump in the winter
  • The AK-SM 850, a new smart front-end controller by Danfoss, secures full energy control of the total store
  • The energy sub-systems are interconnected and controlled to minimise the entire power consumption of the store

Since its opening in mid-August 2013, all systems have been performing as expected. The sub-system tuning is ongoing, as are measurements and quality assurance checks of over 500 measurement points. These measurements are used to tune and validate simulation models. Danfoss and SINTEF expect that this supermarket will be the concept store for over many Norwegian supermarkets to be built in the coming years.

About Danfoss

The Danish company Danfoss is a global leader in the research, development and production of high efficiency electronic and mechanical components and controls for refrigeration, air conditioning, heating and motion control systems. The company is dedicated to providing technologies and solutions that combine innovative engineering with energy efficiency and environmental sustainability.


Located in Norway, SINTEF is a large, independent research organisation in Scandinavia. Its Energy Research department offers solutions and services among others for CO2 technology in the fields of refrigeration, mobile air conditioning and heat pumps.


By Janet Thompson

Nov 28, 2013, 17:51

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