AccuWIN - heat accumulator

Thanks to the upper connection pipe, water is only taken from the highest temperature level and sent to the heating system. The lower pipe only carries water from the coldest temperature zone to the heating boiler. This allows full use to be made of the entire accumulator volume.

Loading the heat storage cascade

1/ Loading cascade accumulator

The first cascade accumulator is loaded using the accumulator load control system and hydraulic arrangement. Since only a little water needs to be heated, the energy can be extracted quickly. This also helps to reduce radiation losses.

2/ Loading second accumulator

If the temperature near the middle connection line reaches 45 °C, a valve opens and the second accumulator is loaded without auxiliary energy thanks to the thermal lift. At the same time, the bottom part of the first accumulator remains free, for example for energy from the solar heating system.

3/ Both accumulators have been heated through

Once sufficient energy is supplied, both accumulators are completely heated through.

Discharging the heat storage cascade

1/ Unloading first accumulator

When heat is needed, it is discharged from the first accumulator tank. This means that space is made available again in the lower area for the addition of new solar energy. The temperature is ideally stratified in both accumulators because the bottom connection is used for the return. So the second heat accumulator remains warm in the upper part.

2/ Unloading second accumulator

If the temperature in the first heat accumulator falls below that in the second, the heat is moved from the second to the first accumulator using a pump. The ideal heat stratification is therefore retained and all the stored energy can be used.