Energy Storage Using Refrigeration


Jonathan Steven of GGS has been one of a small technical team developing the innovative EnergiVault concept of energy storage using refrigeration. See for details of the concept.


Many renewable energy sources are intermittent or the periods of generating maximum energy do not coincide with periods of peak use. This is known as “wrong time.“ energy and is one of the current limitations on the growth of renewable energy generation.


Jonathan of GGS and the team have developed a novel approach to storing energy at peak generation times in a unit that can then discharge when demand grows. It does this using heat pumps (a speciality of GGS) in a different configuration and used for refrigeration. The resulting EnergiVault unit is an effective bank for energy that can be charged and discharged frequently without loss of performance.

The Proof of Concept work for this project is now completed (late 2018) and a pilot unit is available for demonstrations of the technology. EnergiVault development was partly funded by a grant from the Innovus Technology Investment Fund (administered by the University of Manchester School of Electronic and Electrical Engineering).

Partner comment

“I was impressed by the project team's ability to deliver what they had said they would, to schedule and with clarity on both the technology and its commercial potential. I have been involved for 20 years in the commercialisation of early stage technologies and it would appear that this technology has considerable immediate potential for providing cooling energy storage, load management and grid frequency response with a marketplace across a range of sectors in the UK and worldwide.“

Dr Frank Allison Innovus Project Mentor/Monitoring Officer and Managing Director, FIS360 Ltd

GGS comment

“The combination of my heat pump expertise and experience with the knowledge of specialists in refrigeration technology has led to the development of EnergiVault. We still have plenty of hurdles to get over in terms of commercial development but the technology is sound and it has the potential to make a big difference to renewable energy generation and storage in future.“

Jonathan Steven
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