Digitalisering skaber store gevinster i Svebølle-Viskinge Fjernvarmeselskab

Digitalisering skaber store gevinster i Svebølle-Viskinge Fjernvarmeselskab

Sænkning af fremløbstemperaturen med 10 grader, markant reducering af varmetab samt fastholdelse af varmeprisen.

I magasinet Dansk Fjernvarme kan du læse mere om gevinsterne ved datadreven styring og visualisering i Svebølle-Viskinge Fjernvarmeselskab (m bl.a. Svend Müller).

Her samarbejder DTU – Technical University of Denmark (m Henrik Madsen, Per Sieverts Nielsen samt Dorthe Skovgaard Lund m.fl.) med ENFOR A/S (m bl.a. Mikkel Westenholz) om udviklingen af metoderne gennem IDASC (hjemsted på Gate 21 m Karolina Huss), CITIES Innovation Center samt vores tidligere Smart Cities Accelerator. Og ABB (partner i FED-projektet) er med i aftestningen.

Læs også artiklen her:

Svend Müller, bestyrelsesformand i Svebølle-Viskinge Fjernvarmeselskab (tv) og Mikkel Westenholz, CEO i ENFOR. Foto: Hanne Kokkegård
Svend Müller, bestyrelsesformand i Svebølle-Viskinge Fjernvarmeselskab (tv) og Mikkel Westenholz, CEO i ENFOR. Foto: Hanne Kokkegård

Energy communities: Good or? CITIES is looking behind the hype

During a new demo project at CITIES – Centre for IT-Intelligent Energy Systems – Danish Energy and DTU Compute will make a simple analysis of the impact of energy communities on the national grid.

Energy Communities is a new player on the energy market that can help incorporate larger amounts of sustained energy in the energy system.

Usually, energy communities include prosumers (consumers of energy that produce energy at certain times) that can have or have not the possibility to store energy, e.g. via batteries or thermal energy storage. Although these concepts can sound attractive to different stakeholders, it is not yet clear what the impact of ‘energy communities’ on different distribution systems is. 

I a new demo project Danish Energy (a non-commercial lobby organisation for Danish energy companies) and DTU Compute will look at the impact of energy communities on three different grid layouts – urban, suburban and rural areas of Denmark – to estimate the consequences of different set-ups of energy communities on distribution grids, as well as to find the energy community set-ups that require further research.

– Of course, the idea of creating sustainability with local energy production sounds very good. But we are looking behind the hype. We are not focusing narrowly on the small energy community but look at the horizon to understand the whole role of these energy communities to see the impact on the whole national grid, Dominik Franjo Dominkovic, Postdoc at DTU Compute, says.

– We hope that the results of this project can serve as a solid foundation for designing future flexibility services and tariffs for energy communities, taking into account the different structures (shapes) of energy communities, Jan Rasmussen, Head of Department at Danish Energy, says.

Different kinds of energy communities
The energy communities are not very good defined. And we only have seen very few of them so far.

It could be only two players exchanging their energy in real-time. It could be an energy community far from the owners who just sell the energy to the marked or is used in the houses there. It could be in the city or far out in the countryside.

Some of them could store energy, e.g. via batteries or thermal energy storage for later use by themselves when the energy production is low or for selling at the energy market. Sometimes they will need to get energy from the grid to secure enough energy for the consumers. You could also think of energy communities where the energy is not as green as the energy from the grid.

Therefore Danish Energy and DTU Compute will make a simple analysis of the impact of energy communities on three different grid layouts with a small, a medium and a large setup.

Some of the questions that will be tackled are how an energy community should be billed and how the distribution grid tariffs should be constructed. The demo project looks at both the economy and CO2-reduction.

– The idea is to see in which setup these communities benefit the distribution grid and in which setup they do not support the distribution grid at all or perhaps even having a critical impact for the grid. At the end we would like to see how changes in the energy prices will affect the situation, Dominik Franjo Dominkovic says.

Danish Energy is experiencing an increasing interest in energy communities covering housing association and parts of larger cities.

– It is of great importance, those energy communities are rewarded if supporting the grid, and are integrated into the electricity system in a non-discriminated way, together with all other electricity users. As energy communities can have many ‘shapes’, it is needed to create a foundation for designing future flexibility services and tariffs. We believe that our engagement in the CITIES project can provide this, Jan Rasmussen says.

Learn more about the demo project

See also the YouTube-video from Smart Cities Accelerator, where we also researched energy communities.

District heating tests climate-friendly air conditioning based on cooled hot water

New CITIES demonstration project explores how much energy it saves by connecting an absorption chiller to district heating as a green alternative to traditional air conditioning, e.g. in server rooms.

Danish version? Find it here:

There are not much ‘sales’ in district heating in the summer at the several hundred district heating companies in Denmark. A test with flexible and intelligent cooling at Grindsted electricity and heating (GEV) in the coming summer might help to change that a bit.

GEV has installed an absorption chiller, which has to cool two meeting rooms. The pilot chiller is a small unit of 2.5 kW. It cools the district heating water from 60 degrees to 13-18 degrees and passes it through a valve into a fan coil to cool the air.

The district heating industry should not really make money beyond for the cooperatives; the project for GEV is more about a green profile and about saving operating costs. Therefore, the partners in the project expect the project moves the power consumption, saves energy for cooling and thus speaks into the green transition because it does not use environmentally harmful coolant.

– These kinds of units could be very interesting especially for heating companies for selling cooling in the summertime when the demand for heating is low. If this project will be successful, the heating companies could find additional demands on heating and get a business case out of it. However, the solution is especially suitable for factories, big stores with refrigeration needs and server rooms, Dominik Franjo Dominkovic, Postdoc at DTU Compute and demo project leader at CITIES, says.

The  absorption chiller is the grey instrument at left.  The pilot chiller is a small unit of 2.5 kW. It cools the district heating water from 60 degrees to 13-18 degrees and passes it through a valve into a fan coil to cool the air.  Credit: GEV
The absorption chiller is the grey instrument at left. The pilot chiller is a small unit of 2.5 kW. It cools the district heating water from 60 degrees to 13-18 degrees and passes it through a valve into a fan coil to cool the air. Credit: GEV

Green energy or operational optimization 

The Danish company Energy Cool, which usually sells small installations, where electricity is used exclusively for cooling, develops the set-up. Here, a model has been further developed to convert district heating to cooling water, which is used for comfort cooling of the two meeting rooms, explains Henrik Thorsen, Director, Energy Cool:

– Our normal source of supply is electricity, but this project is extremely exciting, as we can combine green district heating here, which in the summer period is surplus of precisely during the period when most cooling is needed.

– This CITIES project opens up completely new opportunities, to increase our storage technology and utilize green energy, as well as increase flexibility, which can thus contribute to the green transition. We hope with the project to be able to help reduce energy consumption, ensure that green energy is used and utilize surplus heat for cooling, he says.

Energy Cool works with storage technologies to minimize power consumption and shift it across the clock when the power is produced green or to optimize operation.

DTU has installed sensors at GEV to collect data about temperatures from the meeting rooms and the district heating water in the building, as well as power consumption. Energy Cool will deliver the data from sensors via the firm’s own cloud solution during the period from late spring to late summer.

– We will get data in real-time and based on that we will be able to test a simple model for demand response in relation to the energy and district heating prices on the energy market. According to that also to shut down the cooling production and increase it on other times based on the price, Dominik Franjo Dominkovic says.

The need for ventilation created the idea

The idea originally came about because GEV should have installed ventilation in the company’s office building. It would cost DKK 2 million to install a ventilation system. In addition, the electricity bill would also be expensive.

– That’s why we started looking at cheaper options with completely different and more ‘green’ glasses. By thinking carefully about and collaborating with the right people, we have found that using cooled district heating water to cool down warm rooms with, says Leif Jørgensen, operations and project manager at GEV.

Here the power consumption will be low and GEV can use some water that the company already has. Initially, the project runs on a small scale. The absorption chiller is installed in GEV’s heating plant and cools the water and passes it on to the ventilation units in the two meeting rooms, which were connected to the mains on April 1.

– The whole scam about this is also that in the long term we expect to be able to cool our office building with quite a few cooling units, which cost almost nothing. We also expect that even in the future we will be able to produce the small amount of power that the system requires using solar cells. But that will be the next step. Now we need it to run in the two meeting rooms, so the server room and then likely the whole office building, says Leif Jørgensen.

He also mentions the purely aesthetic. Radiators quickly look a little ugly. Here the cooling unit in each room is the size of a radiator but smooth on the outside. Finally, there is also energy in cooling down. Even though it is cold air, it can be used for district heating, for example with a heat pump. However, it will require some investment.

– You could easily replace a number of radiators in our office house, and then have them produce heat in the winter and cold in the summer, so that the same heat pipes supply hot water during the heating season and cold water in the summer season. Such a solution will be interesting. There is clearly a perspective in trying something. That’s what we can get out of this collaboration with DTU and Energy Cool in CITIES, says Leif Jørgensen.

The market for cooling is growing rapidly

Henrik Thorsen points out that the market for cooling is growing rapidly due to global warming, as well as increased data consumption, which requires the expansion of technical installations.

– There are huge prospects in converting heat to cooling, and we are proud to develop customized solutions in collaboration with DTU and CITIES that benefits our customers and especially the environment, Henrik Thorsen says.

At DTU Compute Professor and Project Manager at CITIES Henrik Madsen also links the demonstration project to other projects:

– Like other CITIES solutions, the idea is that the final solution will be scaled up for use in several other contexts at Denmark’s new digital hub for smart energy systems, Center Denmark.

With the location at Kolding, Center Denmark is located near key national players in the energy market, such as Energinet, Ørsted, EWII, TREFOR and Danish District Heating.

This location will help ensure that Center Denmark becomes the hub of the new Energy Silicon Valley in Trekantområdet between Vejle, Fredericia and Kolding. Center Denmark has a close association with all four technical universities in Denmark, as well as a number of key players for a smart green transition.

Learn more about the demo project here.

Credit: EnergyCool

Material from Masterclass: Can district heating become self-learning?

Digitalization is an important element in the future of sustainable supply solutions. In recent years, the proliferation of consumption meters and temperature sensors in the district heating supply has created a great potential for using real-time data and artificial intelligence to make district heating greener and more economically sustainable.

On March 5 2020, Professor and Center Manager for CITIES Innovation Center Henrik Madsen gave a presentation on a masterclass at Gate21 (and the IDASC project): Can district heating become self-learning? Find the presentation material (Danish) at Gate21.

Henrik Madsen – Gate21 Masterclass March 5 2020

Middelfart Fjernvarme as a testing place for CITIES’ demo project for district heating bidding optimization

One of CITIES’ demo projects is to develop an optimization method for the combined heat and power production planning in district heating systems and apply it to a real-world demo-case.

The idea is to improve bids for selling and buying electricity in power markets- and in the end to automate the bidding.

Assistant Professor Daniela Guericke, Postdoc Ignacio Blanco at DTU Compute together with Anders Andersen, EMD, have developed novel methods for the operation of district heating systems co-generating heat and power in 2018. Research Assistant Amos Schledorn from DTU Compute has now further developed the models.

Before the corona crisis closed Denmark Amos visited Middelfart Fjernvarme in Fyn to meet the operations manager, Jesper Skov, and learn how electricity market bids for combined heat and power generation are generated in Middelfart. Amos also showed how far his own model has been developed and tested it with new data from the district heating company.

– It was very nice to visit Middelfart Fjernvarme and see how things are working in the real world. Now, I am working on integrating the feedback from Jesper, so we can develop a truly useful method and maybe, district heating companies could do better with a model like ours, Amos says.

Two typical networks of district heating

Middelfart Fjernvarme has two district heating networks in Nørre Aaby and Ejby. The networks are typical networks of district heating in Denmark, which makes them great testing sites for our model, Amos says.

– The plan is that the algorithm behind the model generates the bids as in the real world – like the operations manager Jesper is doing on paper. Our idea is that the method will automate electricity market bidding for combined heat and power generation and ideally, will improve both profitability for district heating companies and flexibility in the national power system. That will also allow us to evaluate potential investments in the district heating network under realistic operational strategies.

– Jesper Skov uses also an online tool, but he has to do that by hand. It would be nice if you could just insert your data once, and the computation of power market bids is automated, Amos says.

In addition, Middelfart Fjernvarme is happy to help:

– It has been interesting and informative to try to help DTU to create a model to automatize the biddings in the power-market. If they succeed, it will be a very useful software for the district heating companies for optimizing their biddings, Jesper says.

Amos continues his work at DTU Compute for the next months. When the model is ready, further software development will be required to integrate the model into a larger toolbox.

Learn more about the demo case here:

Jesper Skov (left) and Amos Schledorn (right).

No need for performance anxiety about green transition: New Year greeting from CITIES

New Year’s greeting from Henrik Madsen, Professor at DTU Compute, Project Manager at CITIES and Center Manager for the Cities Innovation Center.

The New Year announces the start of a decade of green transition, and the 2020s will be crucial to the future climate on Earth. In Denmark, we have got the Climate Act (Klimaloven) and a goal of 70 per cent reduction in 2030, and the European Commission has announced the Green Deal. So now there is serious action behind the words so that concrete solutions are put into use.

Fortunately, Denmark’s largest smart energy and smart city research project, CITIES – supported by the Innovation Fund Denmark, shows that there are already many tools on the shelves that give hope that the green transition will succeed. And that it doesn’t have to be that hard.

CITIES is a research project. Here, one year before the project ends, we are pleased that we have already published 110 scientific papers. It is far more than the originally promised 30-40 articles. It is well worth noting research results published in peer-review magazines. This shows, I believe, that there has been a need for research in the field of smart energy systems because we do not get results in scientific journals if the research tells something that is well known and tested. CITIES has been and is the leader with the new knowledge.

When we talk about crucial new CITIES knowledge that is important for the conversion from fossil fuels to renewable energy, ‘flexibility’ is at the top.

The energy production of the future will fluctuate as the wind blows and the sun shines. Consumers need to adapt to production, as opposed to today just turning coal and gas up and down in line with consumer needs. Consumer flexibility in the future must ensure a balance between production and consumption.

Before CITIES got started, all previous projects showed that there was no or only very low flexibility. But they had looked isolated into, for example, the grid. That was not the right way to study the problem. We can see that there is a lot of flexibility when we focus on the sectoral connection and use IT tools to control the interaction between electricity, heat, gas, etc. It shows many of our demo projects.

At CITIES, we have often connected digitization solutions to the technological solutions that partners such as Grundfos and Danfoss already have, to get the flexibility. 

For example, we have seen that today we can save 15-20 per cent in CO2 emissions in some of the demo projects through IT management, so we use electricity and heat up when there is plenty of wind turbine power in the electricity grid and on the other hand save electricity when it comes from fossil fuels.

It is just one of 30-40 different CITIES solutions. In addition, we have developed low-temperature technologies in district heating, technologies for operating optimization of the temperature in district heating plants, technologies for operating optimization of wastewater treatment plants, heating of holiday cottages and for controlling the grid.

For example, a report prepared by Damvad for Danish District Heating shows that Denmark will be able to save DKK 800 million annually by optimizing and lowering the flow temperature in district heating systems using IT and data-intelligent solutions developed through CITIES.

We promised savings and CO2 reductions. Today we have tools and knowledge that the world did not have as we embarked on how to get flexibility and accelerate the green transition. This is often done by building on existing solutions from Danish companies, and therefore CITIES solutions lead to an acceleration of the green transition through green growth; including more jobs, increased revenue and exports.

This is one of the things we will be presenting at the closing conference for CITIES on November 9 and 10, 2020. Please put the date in your calendar right away!

When CITIES started back in 2014, many talked about ‘smart city’. But there were no tools available. Today we have the tools and the municipalities are coming along: CITIES shows that there is hope for the green transition.

However, our research also shows that we need changing framework conditions and taxes. The existing framework conditions are a barrier to the green transition – a barrier to the solutions that ensure the green transition and the possibility of reaching, for example, the Danish 70-2030 target.

In CITIES we have the solutions, but it is the politicians who must now create the basis for Denmark – through e.g. the new digitization centre for smart energy systems ‘Center Denmark’ – to show the way to a quick and efficient green transition.

Denmark is lagging behind because the politicians will not address the framework conditions.  A report released by the European Commission just before Christmas confirms that.

In Denmark, there is broad political agreement on the ambitious target of a 70 per cent reduction in greenhouse gases by 2030. This year the government will spend more than DKK 1.5 billion on green research. In order to really benefit it requires the right framework conditions.

The energy agreement from 2018 and a number of committees have highlighted the need for new framework conditions, but nothing has happened. CITIES has in a collaboration between industry, universities, SMEs and people focused on innovation developed and proposed a structure for new framework conditions. We hope that we will get some framework conditions as soon as possible that, unlike the current ones, can promote the green transition – accompanied by green growth.

In 2014, CITIES published a brochure entitled: Could we be 100% fossil-free tomorrow?

The answer was – and is – yes! Maybe not tomorrow. In CITIES we don’t think it is that hard. We just need to be smarter than today and use intelligent solutions – and stop clinging to outdated framework conditions.

Happy New Year.

Danish version – look at the pdf

Overskudsvarme kan gøre den frosne juleand mere grøn

Varmeproduktionen fra køleanlæg i supermarkeder kan let genbruges internt og ledes ud i fjernvarmenettet, viser projektet Super Supermarkets med bl.a. CITIES-partnere. Gratis kogebog og to beregningsmetoder kan hjælpe supermarkeder, der vil i gang. Og lovændring vil gøre det endnu mere attraktivt.

Efter mange års tøven behandler Folketinget lige nu et lovforslag, der skal gøre det rentabelt at udnytte overskudsvarme på nye måder.

På sigt betyder det, at supermarkeder vil kunne udnytte varmeproduktionen fra køleanlægget både til opvarmning internt i supermarkedet og sælge (rest)varmen til det lokale fjernvarmeselskab. Varme, der for omkring 95 procent af tilfældene i dag går til spilde – både i Danmark og ude i verden.

“Perspektivet er stort. Genvinding af varmen betyder også, at kølevarerne i butikken belaster klimaet mindre. Man kan fristes til i denne søde juletid at sige, at udnyttelsen af overskudsvarmen vil gøre juleanden mere grøn, når den er slagtet,” fortæller Torben Funder-Kristensen, chef for PA i Danfoss Cooling, der er partner i CITIES.

“Perspektivet er stort. Genvinding af varmen betyder også, at kølevarerne i butikken belaster klimaet mindre. Man kan fristes til i denne søde juletid at sige, at udnyttelsen af overskudsvarmen vil gøre juleanden mere grøn, når den er slagtet.”

Torben Funder-Kristensen, chef for PA i Danfoss Cooling, der er partner i CITIES.

Kogebog og beregningsmodeller

CITIES arbejder i forvejen med energioptimering og data i supermarkeder, og i relation til CITIES har Danfoss sammen med flere andre CITIES-partnere og eksterne partnere netop afsluttet projektet Super Supermarkets, hvor man har testet ovenstående udnyttelse af overskudsvarmen.

Erfaringerne i projektet er så gode, at det er mundet ud i en kogebog for, hvordan supermarkeder kan gribe det an fra a til z, hvis de vil i gang – samt to beregningsmetoder, der kan vise, om det kan betale sig at installere et anlæg, så man udnytter overskudvarmen. 

Det koster selvfølgelig penge at installere anlæg, der gør det muligt at udnytte overskudsvarmen. Men erfaringerne viser, at anlæggene vil være tilbagebetalt inden for tre år.

“Der blæser nye vinde over Danmark med en klimalov, der skal sikre, at Danmark har reduceret udledningen af drivhusgasser som CO2 med 70 procent i 2030 i forhold til 1990-tal. Derfor gælder det om at få fat i alt det, som vi kan få fat i, som fx overskudsvarmen i supermarkeder,” siger projektleder Lotte Gramkow fra CLEAN.

“Og det kan gøres enkelt. Vi har de tekniske løsninger. Vi har masser af fjernvarme i Danmark. Så det giver rigtig god mening at lade tingene gå hånd i hånd,” siger hun.

Artiklen fortsætter under grafikken

Grafik fra Super Supermarkets

Forskning der kan bruges af supermarkeder globalt

I Danmark giver det mening at tænke fjernvarmenettet ind, fordi fjernvarme er så udbredt. Men også i områder uden fjernvarme  giver det mere mening at bruge overskudsvarmen internt som opvarmning i supermarkederne.

“Vi ved, at EU vil prioritere fjernvarmen langt mere i fremtiden simpelthen, fordi det er meget effektivt. Op til 50 % af EU’s varme skal leveres via fjernvarmen, og det er en kæmpe mulighed for de decentrale store varmepumper og supermarkedsanlæg,” siger Torben Funder-Kristensen.

Alternativt kan overskudsvarmen gå til en varmepumpe i nærområdet i forbindelse med et slags energifælleskab fx industrisymbiose.

“Vi ved, at EU vil prioritere fjernvarmen langt mere i fremtiden simpelthen, fordi det er meget effektivt. Op til 50 % af EU’s varme skal leveres via fjernvarmen, og det er en kæmpe mulighed for de decentrale store varmepumper og supermarkedsanlæg.”

Torben Funder-Kristensen, chef for PA i Danfoss Cooling, der er partner i CITIES.

“I kroner og øre er det svært at give et præcist tal for, hvor stor gevinsten er, for det handler om butikkens størrelse og hvor effektivt køleanlægget kører i forvejen. Men en butik kan sagtens have varmeudgifter for 150.000 kroner, og den udgift slipper man for, hvis man udnytter overskudsvarmen internt,” siger Torben Funder-Kristensen.

Det har man fx set i et andet forsøg med et varmegenvindingsanlæg fra Danfoss i Superbrugsen i Augustenborg på Als. Anlægget betyder, at overskudsvarmen nu både varmer selve butikken op og sørger for varme til rengøring af butikkens slagterafdeling. Desuden leverer butikken varme til fjernvarmenettet svarende til varmeforbruget i cirka 15 standardhuse på årsbasis.

Ifølge Danfoss har det givet en besparelse på el og varme på cirka 90.000 kroner på årsbasis for butikken.

Masser af varme fra de kraftigt dimensionerede køleanlæg

Der produceres overskudsvarme i mange typer erhverv. Men lige netop supermarkeder er interessante i den sammenhæng.

“Der blæser nye vinde over Danmark med en klimalov, der skal sikre, at Danmark har reduceret udledningen af drivhusgasser som CO2 med 70 procent i 2030 i forhold til 1990-tal. Derfor gælder det om at få fat i alt det, som vi kan få fat i, som fx overskudsvarmen i supermarkeder.”

Projektleder Lotte Gramkow fra CLEAN.

I dag er supermarkedernes køleanlæg kraftigt dimensioneret, fordi man vil være sikker på at kunne holde fødevarerne kolde selv på de varmeste sommerdage.

Køleanlægget fungerer ligesom køleskabet hjemme, der har en varm og en kold side. Når man køler luften ned, tager man energien ud af luften. Energi kan ikke bare forsvinde, så i stedet havner det ofte på taget af supermarkedet. Samtidig varmer supermarkederne deres butik op med anden varme, fx naturgas.

Det optimale vil derfor være, at supermarkedet selv udnytter varmen til opvarmning af butikken og så sælger resten af varmen til fjernvarmeselskabet til en pris, de har forhandlet.

“Vi synes, at supermarkeder er et godt sted at høste overskudsvarme, fordi det måske er knap så kompliceret, som hvis man går ud i industrien og skal ind i industriproces fx med meget højere temperaturer. Her er det lettere at styre processerne,” siger Lotte Gramkow.

“Samtidig ligner kølesystemerne hinanden, uanset om det er i Coop-supermarkeder eller Salling Group-supermarkeder. Og eftersom der cirka er 2700 supermarkeder i Danmark, kan de udvalgte være rollemodeller,” mener hun.

Sådanne foregangsbutikker er der brug for, for det er svært for supermarkederne at gå ind på ’markedet’ for overskudsvarme, eftersom deres kernekompetence er at sælge varer – ikke overskudsvarme til fjernvarmenet.

Ny lovgivning på vej

I Super Supermarkets har man testet metoden i tre Coop-butikker og sammen med de tre lokale fjernvarmeselskaber i Kerteminde og Otterup på Fyn samt i Bjerringbro i Jylland.

Partnerne i Super Supermarkets mener, at den nye lov gør beskatningen af brugen af overskudsvarmen fornuftig, forklarer Torben Funder-Kristensen:

“Hidtil har det været dyrt at udnytte overskudsvarmen internt i virksomheden, fordi strømmen brugt i køleanlægget kører uden afgifter som processtrøm, mens der så er afgifter på varmen, hvis man vil udnytte den selv. Nu bliver afgifterne justeret, så man betragter alt varme som lavet af en varmepumpe med en COP på 3. “

“Det vil sige, at varmen divideret med 3 svarer til den strøm, som der skal svares varmepumpe-elafgift af. Til gengæld skal man ikke betale varmeafgift længere, og man kan køre sit anlæg optimalt i forhold til at producere varme og køle på samme tid. Så kan butikken få det bedste energiøkonomiske output anlægget,” siger han.

Det ventes, at loven bliver fulgt op af en anden lov, der også vil øge interessen hos supermarkeder for at sælge overskudsvarmen til fjernvarmenettet.

I dag bliver alle – både store og små virksomheder – betragtet som et varmeværk. Det betyder, at små supermarkeder vil skulle lave specialregnskaber og foretage en priseftervisning, der viser, at salgsprisen for varmen er korrekt prisfastsat. Det er alt for  kompliceret og resultatet er, at man ikke bruger denne mulighed i stor udstrækning endnu

Derfor er der flere gange været lagt op til at lave en minimumsgrænse for, hvor stort supermarkedet eller andre virksomheder skal være, før de skal lave specialregnskaber for salg af overskudsvarme. Ved det nuværende lovforslag er der ikke indført en minimumsgrænse.

“Vi håber godt nok, at vi er blevet hørt, og at der kommer en klar minimumsgrænse for fritagelse for priseftervisning og pris regulering for de små bidragsydere. Vi har 2700 supermarkeder i Danmark og selv om de ikke alle har muligheden i dag, så skal dem, som kan levere varme, have muligheden ved at forhandle en fornuftig pris med fjernvarmen – og så skal der ikke mere kompleksitet i det,” siger Torben Funder-Kristensen.

Fakta om Super Supermarkets

  • Projektet har fået 2,9 millioner kroner i støtte fra det Energiteknologiske Udviklings- og Demonstrationsprogram, EUDP.
  • 13 partnere: Danfoss A/S, COOP A.M.B.A., Dansk Fjernvarme (DFF), OK A.M.B.A., Teknologisk Institut (TI), Ivar Lykke Kristensen (ILK), Dansk Fjernvarmes Projektselskab (DFP), AK-Centralen (AK-C), KTH Royal Institute of Technology Stockholm (KTH), Gudenådalens Energiselskab, Fjernvarme Fyn, Kerteminde Forsyning, CLEAN (projektkoordinator)
  • Tre COOP supermarkeder i Ottestrup, Kerteminde og Bjerringbro har deltaget.
  • Der er i dag etableret varmegenvindingsanlæg ved cirka 150 butikker. Under 100 butikker leverer i dag overskudsvarme til fjernvarmenettet.
  • Partnerne i Super Supermarkets anslår, at der er potentiale for at udnytte overskudsvarmen internt og i fjernvarmenettet ved 2700 supermarkeder i Danmark.
  • Projektet har udarbejdet en kogebog, som kan hjælpe butikker med at komme i gang. Samtidigt har man udarbejdet to beregningsmodeller, som butikker kan bruge til at undersøge, om det kan svare sig at udnytte overskudsvarmen. Alle tre værktøjer ligger frit tilgængeligt på projektets hjemmeside.
  • Kilde: Super Supermarkets

OM CITIES – Center for IT Intelligente Energi Systemer

Danmark har et mål om et energisystem, der kører 100% på vedvarende energi i 2050 og en 70 procent reduktion af drivhusgasser i 2030. Danmarks største smart city-projekt, CITIES, forsker i løsninger, der støtter overgangen fra fossile brændstoffer til et moderne samfund, tilpasset bæredygtige energisystemer.

CITIES dækker over en bred vifte af forskningsaktiviteter, der letter fleksibiliteten i hele energisystemet ved at forske i effektive, integrerede og intelligent energiløsninger. Aktiviteterne i CITIES dækker alle aspekter af energisystemet, herunder el, gas, fjernvarme/køling og biomasse. Og vigtigst af alt forsker vi i metoder, der bygger på kunstig intelligens (AI) til at analysere store mængder data, så vi kan forudsige, kontrollere og optimere samspillet mellem energiformerne.

I CITIES medvirker otte danske og svenske byer og kommuner, 24 danske og svenske industrielle partnere samt 15 internationale videns-institutioner fra EU, Kina og USA. Projektet støttes af Innovationsfonden.

Læs også:

Ajour 2019: Energy taxes must reflect CO2 emissions

The government’s more ambitious targets for CO2 reductions require new technologies, but also a new tax structure that will serve as an incentive to use types of energy with the lowest CO2 emissions.

For technology, the green transition cannot do without the right policy – and vice versa. This is the message in the presentation that Professor Henrik Madsen, DTU Compute, will give at Ajour 2019 – the Danish Engineers´ Association’s annual trade fair. (Maskinmesternes Forening.)

In Ajourmagasinet Henrik Madsen tells more about his upcoming presentation ‘Intelligent energy – an acceleration of the green transition through digitalisation’. The presentation is based, among other things, on a memo that a CITIES task force has recently send to the Danish Energy Agency and politicians on how dynamic CO2 taxes can support the green transition.

Read the article (Danish version) in Ajourmagasinet here.

Read the note ‘Energy Taxes for the Future’ (Danish version) here

Here you can read more about Ajour 2019, which takes place on Thursday, November 28 and Friday, November 29 at the Odense Congress Center.

Henrik Madsen, Professor at DTU Compute and centre Director of CITIES Photo: Hanne Kokkegård


GATE21 AND HOFOR will be leading a demonstration on self-learning data-intelligent district heating systems which is built on the tools developed in CITIES

The IDASC project aims to collect and disseminate experiences about opportunities surrounding the self-learning systems.

As part of the project, IDASC will test different models for using more real-time data in district heating, meaning senior executives, decision-makers and politicians involved in district heating can be given the best possible conditions for assessing its potential. This includes technical advantages and economic savings, as well as its CO2 reduction potential.

HOFOR – Greater Copenhagen Utility is the test partner for the project, testing a district heating network serving 25 apartment buildings. Here, a method will be developed to use smart meters from district heating customers for data-driven temperature optimization. The trial period will begin with the start of the 2019 heating season.

Read more in the pdf

Renewable Energy Forecasting Summer School, Rio de Janeiro, November 2020 – virtual

Henrik Madsen, center director of CITIES and professor at DTU Compute, is invited to Rio de Janeiro in Brazil on 2-5 November 2020 to hold: Renewable Energy Forecasting Summer School.

Following upon the global measures to contain and mitigate the spread of COVID-19, the IIF Board of Directors has postponed this event from July to November.

The IIF Summer School is a two-day course which provides in-depth analysis of a cutting edge topic in forecasting from one of the International Symposium on Forecasting (ISF) invited speakers. The Summer School typically shares the same venue as the ISF.

Renewable Energy Forecasting – Theory and Practice

Today, on average, roughly 50 per cent of the electricity in Denmark is generated as wind and solar power. Wind power alone accounts for around 44 per cent of the electricity load, but this is highly fluctuating. Denmark has hours with almost no wind but also experiences periods with up to 140 per cent of the electricity load. Therefore, forecasting is crucial in order to operate the energy systems including the electricity grid. Prof. Madsen and his collaborators are responsible for the methods used, eg. in Denmark, by both transmission system operators and low voltage operators.

Through a combination of lectures and lab sessions, this course will provide an introduction to methods and tools used for forecasting wind and solar power generation. We will touch upon how the forecasts are used in the daily operation of the power system. For the lab session, R software packages will be used. The topics covered are:

  • Point forecasts and probabilistic forecasts
  • Use of meteorological (MET) forecasts
  • Simple parametric models for forecasting (Box-Jenkins, SARIMA, Holt-Winter, Neural Networks, AI, Hidden Markov, Regime based models)
  • Non- and Semi-parametric methods (Kernel, Spline, Local polynomial, and Varying coefficient based methods)
  • State spaces models in discrete and continuous time
  • Multivariate probabilistic forecasting
  • Methods for forecast evaluation
  • Spatio-temporal forecasting
  • Forecasting hierarchies
  • Combined forecasting (eg. for use of several MET providers)
  • Down- and upscaling
  • Adaptive forecasting
  • Generating forecasts for optimal decision making
  • Tools for wind and solar power forecasting

The course will also provide options for the best tool depending on the penetration level of the renewables and the setting in general.

Interested in attending Henrik Madsen’s summer school? Read more about the course in Rio here.

The power lines meander in the favela Vidigal on a hillside in Rio de Janeiro. Photo: Hanne Kokkegård