HyWin Integration

HyWin facade becomes an important part of the buildings thermal system.


Summer:  the sun generated heat is transferred to the geothermal probes


Winter: the heat stored in the geothermal probes provides room heating through the HyWin.


How much of the heat can be stored and how much of the stored energy can be used is crucial.

The complexity of the interdependent and often unknown or heavily fluctuating parameters makes an engineering estimation difficult:

  • Building dimensions

  • Facade geometry

  • Unpredictable climatic and seasonal patterns

  • Building orientation

  • Adjacent buildings

  • Thermal behavior  of the geothermal probes

  • Occupancy type and internal heat sources

  • Local anergy network and energy usage

  • Regulations


Use of the energy from HyWin

Summer period

HyWin generates substantial energy from the building facade. The energy is stored in the geothermal probes and used in cold periods for heating and for hot water preparation.

The overall annual thermal balance of the geothermal ground probes must be maintained: 

  • If negative, the geothermal field gradually undercools losing its ability to provide energy for heating in winter

  • If positive, they geothermal field gradually overheats losing its ability to provide energy for cooling the HyWin in summer

An additional facade cooling is provided to maintain the balance. Such cooling system has been developed by HyWin and is integrated in the facade.

Both systems heating and cooling are controlled to maintain the desired temperature range in the geothermal field. 


Winter Period

HyWin uses the stored energy to heat the rooms through the same heat exchanger used for cooling in summer

The required heating temperature is substantially lower compared to a standard floor heating, which improves the COP of the heat pumps to 6..8