An energy store using GVI® technology

Nobody would dream of producing energy and not using it, because energy is cost-intensive and one of the most valuable resources of our time. It is therefore all the more important to adopt a sensitive and responsible approach to avoid wasting energy. The question is, however, where to put any surplus from wind power or solar plants.

GVI® energy and heat storage systems are able to store more heat energy in a better way – and thus save resources and money.

Better storage and conduction of heat

Due to the heat exchange, latent heat accumulators in their current form do not provide an optimum charge or optimum heat discharge. GVI® therefore offers an energy storage unit with a stainless steel housing in which all heat exchanger units are exposed to approximately the same pressure losses, thereby achieving the same volume flows for the individual heat exchanger units. This, in turn, ensures that the same heat flows are supplied to and discharged from the heat exchanger units.

This results in the phase-changing storage units charging and discharging in exactly the same way, making almost optimum heat distribution and energy storage throughout the entire latent heat storage unit possible. The use of vacuum insulation in the highly efficient GVI® systems means that sensitive heat is also stored over long periods. So, for example, seasonal storage systems for solar applications can be realised together with many other application scenarios.

Advantages of the GVI® energy storage system:

  • Maximum energy density in a compact design
  • Better thermal conductivity
  • Storage of more heat energy than with previous solutions
  • High chemical resistance

KryoSafe® energy storage

Depending on the required cooling temperature, a cold storage medium (4) with a correspondingly low melting point is selected, e.g. water/salt mixtures, aromatics or alcohols, or adapted mixtures of substances. Due to the mechanically stable and integrated design, the cooling materials cannot contaminate the insulating shell, the transported goods or the surrounding environment during operation.

The KryoSafe® is generally made of thin-walled metal and then welded vacuum-tight. The design of the transport container as a triple-walled metal vessel makes it possible to transport dangerous or contaminated samples extremely safely. However, it is also possible to manufacture the transport container entirely from vacuum-suitable plastics, e.g. GRP materials, and thus offer large, weight-optimised units.

The protective container (1.1) is completely filled with pressure-resistant, microporous insulating material (2), which also firmly encloses the container of the cold accumulator (3) and the vacuum-tight bushing (8) – at the same time securing their positioning in the protective container (1.1).

Smart building and living thanks to GVI® and SmartTherm

Energy-efficient, resource-friendly heating and cooling have become increasingly important in recent years, also thanks to and with political incentives. However, the optimum has not yet been achieved. SmartTherm by GVI® paves the way.

Today, numerous VIP applications for building insulation can already be found in the construction industry. GVI® technology can also be used to good effect in structural engineering. Solar gains can be achieved with combined storage/heating elements and house walls can be used as a means of storage. They are also capable of taking on a static function in the physical structure.

The wall systems are sandwich elements consisting of GVI® top layers and a cement core that forms a unit with the insulation layers. The GVI® elements are switchable or adjustable, allowing heat to be supplied to the cement storage core and extracted for room air conditioning.


  • High energy-efficiency
  • Utilisation of solar gains
  • Simple thermal activation
  • Resource-saving
  • Heat storage and distribution without additional heat exchangers or distribution systems
  • Ideal room and “feel-good” climate
  • Slim design thanks to static function

Adjustable heat absorption and dissipation

Collecting and storing waste heat

Multifunctional wall elements in concrete construction