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.

norwaytoday
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

Comments

Post your comment to communicate and discuss this article.

Society
Euronext operates stock exchanges in Paris, Amsterdam, Brussels, Dublin and Lisbon. In a statement, the operator said it had approached the board of directors of the Oslo Stock Exchange (Oslo Bors VPS) to seek its support for a tender offer of 625 million euros for all outstanding shares in the bourse. "Euronext strongly believes that Oslo Bors VPS' unique strategic and competitive positioning, including a global leading position in seafood derivatives and...
Society
The Abortion Act is one of the most controversial issues during the Government negotiations that started on Hadeland yesterday. NTB has talked to several who were on the «red» side in the struggle for the Christian Democrats’ choice of direction. That ended up with a «blue» victory as most are aware. Not least because of Deputy Leader Kjell Ingolf Ropstad singled out that it presented a «historic opportunity» to make changes to the Abortion Act’s section 2...
Society
A Morocco prosecutor on Sunday presented to an anti-terror judge 15 people suspected of links to the murder of two Scandinavian women in the Atlas Mountains, Rabat's attorney general said. The prosecution asked that the suspects be investigated for "setting up a gang to prepare and commit terrorist acts", "premeditated attacks on life" and "advocating for terrorism", the attorney general said. Seven other detainees will be referred to the prosecution in th...
Society
Lower Norwegian King Crab quotas in 2019 The total Norwegian quota for male King Crabs has been set at 1400 tonnes for 2019. This is a decrease of 350 tonnes from 2018. The Ministry of Fisheries simultaneously warns of tighter control of the industry.   – In recent years we have had a very high degree of harvesting of King Crab. Now the researchers say that if this continues, it will lead to a collapse of the stock. That will not happen. We will continue t...
Society
Dreary news from around the world As Christmas peace descends on those fortunate to live in a peaceful corner of Tellus, it is business as usual, out in the ”real” world. Death toll rises after an attack on Government buildings in Kabul 43 people have been killed following an attack on Government offices in Kabul, Afghanistan on Christmas Eve, the authorities state. At least ten people are injured. Most people killed are employees of the Ministry of Labour...
Society
Heavy winds, avalanche and landslide hazards and slippery roads create problems in several places in Norway on Christmas day. – Drive extremely cautiously, the police urges.   Slippery roads, closed Mountain crossings and bad weather In Voss, one of several areas where, according to the Norwegian Water Resources and Energy Directorate (NVE), there is a considerable landslide hazard on Christmas Day, a two-cubic meter block of ice fell on the E16 at Evanger...
Society
Since 1999, the average American has become heavier and shorter according to a state health study. By 2015, the average height Americans around the country were 175.4 centimetres, two millimetres shorter than at the start of the study in 1999. American women were also two millimetres shorter. The study also shows that American men and women have become around three kilograms heavier on average since 1999. The average American woman now weighs 77 kilograms,...
Society
PFU believes that iTromsø, Dagsavisen and Harstad Tidende have violated good press coverage in their writing surrounding sexual harassment allegations against former Progress Party Youth (FpU) Deputy Leader, Kristian Eilertsen. The cases ended with that Eilertsen received a warning from the Progress Party’s organisation committee, without being deprived of office nor imposed with other sanctions. Eilertsen reacted to the coverage of the matter in iTromsø,...
Society
The European Union on Tuesday published further contingency plans for a "no-deal" Brexit, piling pressure Prime Minister Theresa May by warning that Britons will lose a host of travel rights from recognition of driving licences to lower credit card fees and no mobile roaming charges. The European Commission, the bloc's executive arm, said that, while it is working hard for a deal, it must prepare for "all outcomes" and "contingency measures in narrowly def...