The Jam Session was held to support the further development of utilization of waste heat from the steel plant Ovako. The purpose of the Jam Session was to identify problems and develop proposals for the best solution for Boxholm and Ovako waste heat recovery. The ‘red hot topic’ for the jam session was: Possible solutions for the recovery of all the waste heat from Ovako.


11 people were invited to the jam session, representing Boxholm municipality, Ovako, two different companies (Billerud and SSAB) which have had successful solutions for recovery of waste heat and SEEC providing technical solutions for energy storage. The jam session was held in the premises of ESEA on Friday 6´th February.

Ylva Ek welcomed participants and presented the the BEAST project, within which the local action “Recovery of Waste Heat” is a key action. For more information on BEAST see Anders Carlsson from LIU outlined the purpose and format of the jam session element.

Bertil Lundberg, from Billerud Korsnäs paper mill shared knowledge and good practice from district heating project in Skärblacka and Kimstad and Tomas Hirsh from SSAB, steel industry also shared good practice and experiences from Borlänge and Finspång.

Experiences of Threats from SSAB within the waste heat business are:

  • Increased financial risk in large investments such as e.g. five-year amortization period
  • Residual heat does not count as renewable as it has a fossil origin: The Energy Agency is clear about this.
  • One cannot not be credited with CO2 emissions, which however the power companies get.
  • Operational changes

How to not  get into a partner ship cooperation:

  • Start by talking about the price of the waste heat. // Instead, start by looking at the system solution.
  • Require guaranteed delivery, especially at Christmas and New Year's Eve
  • Put down the project if the calculations do not go together! Counting each resulting Joule, from the waste heat is difficult, because you do not know exactly how much heat is obtained, etc.

Anders Carlsson from LIU informed that 50% of the available waste heat is not recovered today. A major obstacle is fear of disruptions in the regular plant production. Organizational problems are also often an obstacle. A common vision and confidence is necessary. Utilizing waste heat is no core business for anyone; projects often fall on the soft parts.

The intention of Boxholm Municipality is to supply energy to a lower price that today. One proposed project is an Energy storage system for low temperature waste heat (40 degres) with SEEC's technology with drill holes in the ground / rock. Suggested size is about 4,5GWh and will supply a group of service housing with heat and hot water.

Ovako has both high- and low-grade energy and need to be disposed of both. The goal and the terms of condition from Ovako´s part is that there must be a plan and a goal to get provision for both. This is a long-term requirement and it does not play a major role which heat to start with, but both parts have to be disposed.

Boxholm Municipality is too small for the use of all energy.  The low-grade energy of Ovako´s waste heat is estimated to 20GWh. The total energy need of Boxholm is 11GWh.

EON owns the district-heating network in Boxholm and their network covers about 80 percent of the community. EON is currently purchasing energy from a sawmill, Rörvik timber in Boxholm and also supplies heat to the sawmill. If the plant for energy storage is built, EON has stated that they are not interested in participating in the project. EON however are interested in the high-grade waste heat.

Group discussions and comments are presented below:

  1. What do we agree on in the project right now? What do we not need to discuss more?


  • Ovako and Boxholm Municipality has signed a letter of intent for the project saying that Boxholm and Ovako are participating in the project for utilization of waste heat and that one possible solution is storage in drill holes.
  1. Possible technical solutions? Possible stakeholders? Possible business solutions and gains? What positive opportunities do we see?
  • Energy storage for low temperature waste heat (40 degres) with SEEC's technology with drill holes in the ground / rock. Suggested size is about 4,5GWh and will supply a service housing with heat and hot water.

  • Development of energy storage of high-temperature waste heat. Funding to investigate a high-temperature storage system has been applied by SEEC to the Swedish Energy Agency and Jernkontoret.

  • Building a connection to the TV's (Tekniska Verkens) district heating network in Mjölby. On the way to Mjölby there are large farms that are interested in supplying biogas to natural gas pipeline.  Possibilities for cooperation would be interesting to look at.

  • Join the rest of the municipal buildings to waste heat through EON's district heating network, which requires discussions with EON, TV and Rörviks timber.
  1. What questions do we need to answer in order to move on?
  • Is there a need to store high temperature energy the energy is deliver to TV networks?

  • Should we involve TV and their district-heating network or involve EON and their networks in Boxholm? Are they interested?

  • Perhaps enable LIU to be a brokering party in discussions with EON to investigate their interest in the project?

  • Financing for implementation and project leading is lacking and needs to be resolved
  1. Who does what in the next step?
  • Find funding/financing for project leading (Boxholm Municipality, help from ESEA). Funding for implementation of low energy system is ongoing by SEEC to the Swedish Energy Agency and Jernkontoret.

  • Impartial investigation of various proposed alternatives (LIU).

  • Decision from Boxholm Municipality on how to handle all waste energy  (in short and long term).

  • Agreement Signing between Boxholm and Ovako.

  • Discussions with EON and TV (ESEA-meeting organization, LIU-impartial broker)

The complex situation became clearer thanks to this jam session. It is complicated to determine the order in which steps should be taken to meet all interests.

For Ovako's part, it is important that Boxholms municipality makes a decision soon, which includes both short-term and long-term solutions for the handling of all the waste heat from Ovako.

For Boxholm´s part it is also important to make this decision but it involves investigating a range of solutions and involvement of different stakeholders.

Ten evaluation forms were completed at the end of the jam session and one is filled in by a BEAST member. There was positive feedback from attendees, and the jam approach appeared to work well as a model for sharing information and generating useful discussion. On the evaluation forms, participants were asked to score the following statements from ‘1’ to ‘5’ (1 being ‘strongly disagree’ and 5 being ‘strongly agree’).   All participants agreed or strongly agreed that their overall experience of the jam session was positive, that group work was effective and that participation was encouraged.

Comments regarding major strengths and the most useful part of the session, included, “Get information on other solutions”, “A better system overviewand understanding on the driving forces that exist in the project”, “Good to create a common understanding of the problems”,

The suggestions for improvement was “Better background info for preparing discussions”, “Sometimes difficult to hold the line in the discussions that slid onto tracks other than the topical issue. “Maybe create structure via more strict model”

Comments on interesting parts of the jam session included, “The “game” that is part of this project- how one action might change the prerequisites for the whole project” Strengths and weaknesses were clearly visualized”.

Comments on results and useful parts of this jam session includes, “It is clear that a decision in one or other direction must be made now”, the discussion part was the most useful”