Solves one of the challenges with solar energy

Solves one of the biggest challenges with solar energy

In a small shed at the University of Ås, storage challenges with solar energy will be history.

Solar cells in private homes are becoming increasingly popular, but saving energy using batteries or waterborne heat is both challenging and very bulky. Researchers at the university in Ås have now found the solution.

– Heat has been drilled for in recent years. But boreholes often gets colder and colder as you extract the heat, and heat pumps have therefore less and less to work with, says Petter H. Heyerdahl.

The associate professor of the NMBU in Ås stands in a campus shed and looks down at 20 energy wells in the ground in front of him. On the roof over his head 64 square meters of solar collectors are installed.

But in addition to heat domestic water as ordinary solar collectors do, solar energy will contribute to heating of space.

Adapted to Norwegian climate

– While other geothermal facilities run constantly on credit and lose power or get permafrost in the ground after a few years, we instead fill up the account in advance by sending solar heat into the ground. In summer, the hot water from the solar collectors drops to the ground and warms it up before returning to the ceiling for reheating. In the cold season, heat is found in the same way as a common geothermal system. In this way we solve the problem of cold wells and at the same time save the volatile solar heat, Heyerdahl explains.

Already in use in Canada

The technology in the project, which has come to life with the help of Innovation Norway and Anergy AS, is not new. In Canada, the Drake Landing Solar Community, a neighborhood of 52 detached houses in the city of Okotoks, has solar heating in the same way and has been in operation for many years.

Heyerdahl explains that the university’s facility is based on the same technology, but with some adjustments.

-We will see if we can get enough solar energy to supply a single home with heat for the whole year without the use of heat pumps. We use most of the ceiling to retrieve as much heat as possible.

The price of a full scale system adapted to an average Norwegian detached house, according to Heyerdahl, may be around NOK 600,000. However, the investment is rerieved in other areas.

Cuts in insulation

– You can expect to cut costs on insulation with the equivalent when building the house. With ample access to heat, you can have thinner walls. If you go down 20 cm in thickness on the walls, you get eight square meters more living space per floor in a common detached house. So you almost go to zero cost already at construction, saving money from day one when you move in, explains Heyerdahl.

He adds that there are very few with geothermal facilities that check the heat pump’s effect after a few years. This can cause the heat pump to be very ineffective without the consumer being aware of it.

Self-sufficient future?

The pilot plant may be just the beginning of the use of the technology in this country. A larger plant is already under construction, and the tests from the test facility show good results. Heyerdahl is convinced that collecting solar energy will give great results in terms of energy use in the future.

– The larger the plant, the larger the potential heat storage. A large heat storage unit will have less loss relative to the volume and thus higher recovery rate. Therefore, it is beneficial to think of common warehouses in a local district heating system for a group of homes or for larger buildings. With this on the ceiling in addition to a solution with PV solar panel and batteries, you may be able to disconnect the mains. One will be able to approach self-sufficiency, even with the climatic conditions we have in Norway, he says.

Read other news on the city site of Oslo.

Ground Deposit Norway Solar Energy Storage Today
If you notice an error, highlight the text you want and press Ctrl + Enter to report it to the editor
I recommend
No recommendations yet


Post your comment to communicate and discuss this article.

Ferde repays several million after toll scandal A technical error in the North Jæren toll system has led to many motorists being billed too much in the peak hours. Tens of millions will be repaid to the victims, and the peak hour fee is put on hold.   Motorists on North Jæren are furious about the toll station wall surrounding all urban hubs. Now it turns out that they have been overbilled for the peak hour fee. According to the Steering Group for the ”Urb...
Nearly 8000 foreigners took the Norwegian test Nearly 8000 immigrants can have a well-deserved break after completing the last Norwegian examinations of the year. The test is becoming increasingly important.   – Norwegian language skills open the door to integration, education and jobs, says Director in Competence Norway, Gina Lund. The Norwegian test has gained an increasing role, and is, among other things, entry conditions for both residence permits and...
Judgement day for Janne Jemtland’s husband The prosecutor wants the husband of Janne Jemtland behind bars for 18 years for the murder of his spouse. He, however, demands an acquittal. The sentencing is due on Monday morning.   At 10 am on Monday, District Court Judge, Trond Christoffersen, calls for order in court for the last time in the Janne Jemtland case. The Hedmark District Court will then provide an answer to the question that everyone asked before...
The man charged with sending a bomb to the police in Ski has been in conflict with them for a long time. He denies having anything to do with the bomb.   When he was detained for four weeks on Saturday, the man appealed the decision on the spot. His lawyer, John Christian Elden, told VG newspaper that his client does not acknowledge having sent the package containing the bomb. “The basis for imprisonment is primarily the risk that there may have been other...
In Norway, there are far more believers than in Denmark, Sweden, and Finland, according to a new survey.   According to the study by the independent American think-tank Pew Research Center, 17 per cent of Norway’s citizens are strong believers. The same is true for 8 per cent of Danes, 10 per cent of Swedes and 13 per cent of Finns. In the survey, the degree of religiosity is measured in all the European countries. Romania is at the top with 55 per cent st...
PST investigate threats against Minister of Justice, Wara The Special Branch (PST) investigates serious threats to Justice Minister Tor Mikkel Wara (Progress Party). His house and car have been tagged, and his car may have been attempted to be ignited.   – We have started investigating threats against Government officials this afternoon. We are in an initial phase of the investigation. There are aspects of the matter that make us look very seriously at it,...
Norwegian Fisheries Directorate wants a ban on cod fishing in entire Oslofjord The Norwegian Fisheries Directorate proposed a ban on fishing for cod from Telemark to the Swedish border, which means that the entire Oslofjord will be subject to the ban.   The proposal is a follow-up after the Directorate issued a consultation proposal earlier this year. The reason for the proposal given was that measures must be taken because the state of the coastal and fjo...
The Police House at Ski is evacuated because of a suspicious parcel in the public area.   The bomb squad is on the spot to investigate the object. It is uncertain whether the package has arrived via the mail or has been delivered at the reception. There is no danger to the area outside the police house, writes Dagbladet. The customer reception at the police house in Ski in Akershus is temporarily evacuated, writes the Eastern Police District on Twitter. –...
Prime Minister Erna Solberg does not want to change abortion practice in Norway, but will remove “discriminatory element in the law”, according to Dagens Næringsliv. Solberg has been criticized for her willingness to negotiate changes in the Abortion Act, as she needs the support of Christian Democrats (KrF) for her bourgeois government. In an interview with the newspaper, Solberg says that women should still be able to use abortion right after 12 weeks if...