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Mode of operation

    Thermal energy taken from energy sources (for example solar systems or solid fuel boilers) is stored in the energy tank and may be used as needed for domestic hot water supply or as support to the heating system.Depending on the size of the storage tank, the energy tank facilitates bridging operation over a lengthy time period. During this time, no additional energy must be added.

 

Energy tank with corrugated stainless steel tube

Mode of operation

  • Heat input and output is done solely by an internal heat exchanger made of corrugated stainless steel pipe. This means that the water used as storage medium is completely separate from the heating, solar and service water circuit.
  • The service water heat exchanger uses the heat from the lower portion of the storage container first, before it is then heated in the upper portion to the final warm water temperature. The advantage of this cooling in the lower portion is that the solar system can function effectively even in the cooler seasons.
  • The heat exchanger for heating is used as support to the heating system (heat extraction for heating purposes) and re-heating (ensuring service water heating). To ensure the service water heating, the upper portion of the energy tank can be reheated.

Advantages

          • The variable equipment with internal heat exchangers made of corrugated stainless steel pipe facilitates the direct and simultaneous storage of thermal energy from diverse sources (for example, solar systems + solid fuel boilers + oil or gas boilers, or solar systems + heat pumps + oil or gas boilers).
          • The total system separation prevents mud accumulation in the storage vessel and enables a pressure-free storage design (no expansion vessel necessary).
          • No legionella formation due to the warming of drinking water in the through-flow principle.
          • Greatly reduced calcification rate, due to the turbulent water flow caused by the geometry of the corrugated pipe.

Energy Tank with multi-layer storage system

Mode of operation

        • The cold water is extracted by suction through the lower suction plate during loading, then heated and transferred to the multi-layer storage unit (2). The multi-layer storage unit facilitates the layering of the water, according to its temperature and/or density in the layer corresponding to its temperature.
        • The hot water is extracted by suction through the upper suction plate during discharge, then cooled and transferred to the multi-layer storage unit (3). This gives the cool water the opportunity to be layered in the lower portion of the energy tank during recirculation.
        • Due to the pressure-free operation of the energy tank, an external heat exchanger must be used for system separation.

Advantages

 

          • By using the multi-layer storage unit, even systems with comparatively low power can store their energy in a large energy tank, because the storage area is layered from top to bottom.
          • The total system separation prevents mud accumulation in the storage vessel and permits a pressure-free storage design (no expansion vessel necessary).

Haase Energy Buffer Tank with flange connections

Mode of operation

        • The water is directly put into and/or extracted from the energy tank.
        • During loading, the cold water is extracted from the energy tank by the lower flange, heated, and put into the energy tank by the upper flange.
        • The energy tank is unloaded by the extraction of hot water from the upper portion of the accumulator and input of the cooled water into the lower portion.
        • Due to the pressure-free operation of the energy tank, an external heat exchanger must be used for system separation.

Advantages

          • The buffer can be equipped with any number of flanges of any size. This enables application as a hydraulic compensator and the storage and/or extraction of high energy quantities within a short period of time.

Combining various systems

All of the above-mentioned design variations can be combined with one another.

For example, it is wise to put continuous heat into the energy tank by a multi-layer storage unit, and unload the energy tank again within a short period of time by a flange positioned on the side.