Scandinavian Homes - Research
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Saturday, 2022-07-02
EinStein Project


The overall objective of the project is the development, evaluation and demonstration of a low energy heating system based on Seasonal Thermal Energy Storage (STES) systems in combination with Heat Pumps for space heating and domestic hot water (DHW) requirements for existing buildings to drastically reduce energy consumption in buildings.

The integration between STES system and heat pumps is one of the main breakthroughs of the EINSTEIN project. STES systems are known in northern Europe and heat pump technology is known and used all over the world, but the integration between these two systems is not optimized. An appropriate heat pump does not exist, neither an evaluation tool for this integration design. Within the EINSTEIN project, both barriers will be overcome.

The Objectives

  • To make STES systems cost-effective and to adapt this technology to be applied in existing buildings.
  • To develop a novel, high efficiency, cost-effective and compact heat pump optimized for STES systems.
  • To develop a Decision Support Tool (DST) for selection, design and evaluation of STES integrated system suitable for existing buildings. It will be a user-friendly analysis tool that will allow engineers to select the most suitable technologies to install according to particular specifications of the retrofitting project, to design the heating system based on the STES concept and to evaluate the expected impact of the innovative solar heating plant.

The Research

Scandinavian Homes Ltd is making its solar seasonal store project in Lysekil, Sweden available for further reasearch.

The buildings involved in this project are a merchants house from 1860 which has been upgraded to passive house standard. This building of 380m² floor area consist of two large apartments and four shops / offices. The other building is a new apartment building built to passive standard with 6 apartments at 65m² each on average.

The system consists of the following elements:

- Stratified storage-tank 3.3 m3 (3300l)
- Large seasonal store embedded in 100m3 of granite rock
- Supplemented by municipal district heating
- Total of 50m2 aperture area made up of 10m2 vacuum tubes and 40m2 flat panel collectors

Attached Documents

PDF: Educators training EINSTEIN
Seasonal Thermal Energy Storage (STES) for EDUCATORS (Academic Staff, Higher Education, Public Administration in Charge of Energy, etc)
-What is Seasonal Thermal Energy Storage (STES)?
- Why use STES?
- History of STES
- How does it work?
- Ways to store thermal energy
- How much energy can be stored?
- Where is it best used?
- How much does it cost?
- Case Studies

PDF: Description of STES in Lysekil, EINSTEIN research (Work package 2.6) PDF

PDF: World Renewable Energy Council June 2014 Presentation of the initial results from the EINSTEIN project by Dr. Shane Colclough, Dr. David Redpath, Dr. Philip Griffiths, Prof Neil Hewitt

Scandinavian Homes - Research