HeatTank is the revolution of thermal energy storage systems.
The HeatTank balances the efficiency of the cooling/heating system. It also provides an extra layer of operational safety in case of equipment failure. As its name suggests, HeatTank serves as an energy buffer with independent control logic.
Our competitive advantage: The use of Phase Change Materials instead of water. By melting and solidifying these materials we store thermal energy in a more concentrated way to save space, energy and cost in an environmentally friendly way.
When excess thermal energy is available or can be generated more efficiently we store a part of the generated thermal energy. When we store the cooling energy the Phase Change Material solidifies and when we store the heating energy the Phase Change Material melts.
HeatTank stores the thermal energy which was produced during the charging phase.
When the thermal energy is needed we draw on the pre-stored energy. During the discharge period of the cooling energy the Phase Change Material melts, while for the heat energy, the Phase Change Material solidifies.
HeatTank can be installed in different ways.Depending on the problems that need to be solved
It is possible to use the HeatTank for multiple purposes, for example it can be responsible for peak performance management and increase the efficiency in off-peak periods.
Figure 1 shows that traditionally when the outside temperature is 39 °C and the cooling need is 80 kW, the chosen chiller will be 90 – 100 kW. If we design the system for 95% of the year, the cooling need will be 58,5 kW, which means 37% size reduction compared to the 80 kW system. The system is able to serve the needs in most of the time except for 84 hours (which is divided to 20 days, including 8 weekend days). (It is a typical case in Central Europe.) When there are additional needs, HeatTank will be part of the system and cover the peak needs as an extra cooling energy source.
For peak performance management price-value calculations are required. This purpose is usable where the cooling needs are changing during a day, for example the cooling needs depend on the change of the outside temperature or when the inner heat generation is changing during the day (like in a meeting room). It can also be used for very humid environments, where the peaks are defined by the humidity. The purpose of the HeatTank is to cover the additional needs in peak time.
The 3 possibilities to save energy with HeatTank.
The first possibility is free-cooling. When the outside temperature is lower than the inside temperature the cooling potential of the outside air can be used. We use indirect free-cooling with 2 independent heat exchange surfaces, so the moisture and dust do not get in the building.
The EER (Energy Efficiency Ratio) of the cooling systems are based on the outside temperature and the air humidity. In case of a lower outside temperature the EER is higher, meaning that the energy consumption could be reduced by generating the cooling energy in the most efficient periods (e.g. at night). HeatTank stores this cooling energy and uses it when the efficiency is lower. Figure 2. shows the real efficiency of a modern chiller, based on measurements.
Further our customers get a balanced energy consumption which is favorable at negotiation with energy suppliers. It is also possible to use the energy tariff difference between peak and off-peak periods (if it is available in your country).
The 3 possibilities to save energy with HeatTank.
HeatTank has its own controller unit. It contains the hardware and the software as well. This controller's main task is to work on optimization of the cooling from 30 facts. It is patented.
There are several phase change materials that we use. We decided to use these materials after many years of research. These are completely harmless for the environment and for humanity. Their lifetime is about 30 years, if we calculate with one phase change per day. We have several suppliers who can ensure the material supply.
Max performance [kW]
External volume [m3]
PCM volume [m3]
Height with insulation [mm]
Width with insulation [mm]
Length with insulation [mm]
Heat exchanger circuits [nr.]
Empty weight [kg]
Total weight [kg]
Usually it takes 8-10 weeks from assessment to installation.
We make assessment on your cooling system and design a unique HeatTank system for you after we discussed which possibility is the most important in your case (saving energy, increase safety etc.).
You get an offer, when you are pleased with the calculations, which is personalized for your unique system.
We manufacture and deliver your tank with the phase change material together and buy your system items (thermoventillator, pump etc.).
After delivery the HeatTank is ready for installing. As you would like, our or your maintanance staff install it and we optimize the operation for your cooling system.
After the installation and optimization we can provide monthly energy reports on the quantity of saved electricity.
To get an indicative offer, first choose which sector do you work in?
HeatTank saves huge amount of cooling energy besides adds an extra safety layer, so it’s highly recommended for cutting edge server parks.
Saving waste heat energy and use in time when it’s required. The gas engines is a perfect example for this field of application.
We joined a remarkable project, as the HeatTank eliminates the unnecessary energy consumption with supporting the district heating and cooling.
Is HeatTank suitable for cooling and heating?
Yes. The tank is able to store cool and warm energy, but we have to use different phase change material for the different temperature level, so you can’t use the same tank for the different temperature storage.
What temperature can be useable by HeatTank?
Simply. We need only 2 bypassing on the cooling system’s refrigerant pipeline, which lead into the HeatTank.
Does it produce thermal energy?
No. It is able to store energy by indirect free-cooling or through on air-conditioning system.
Does the HeatTank need any special maintenance?
No. It is a passive system. If we have to add extra system items (e.g. pump), they have general maintenance process.
What is the long-life period of the phase change material?
It is 30 years calculated with 1 change per day. Its efficiency will be 5% less after 30 years.