Storage tank (domestic hot water)

Own input heat transfer

 EPG
The heat transfer coefficient of the heat storage is determined flat rate by default, but may also be specified in detail by presenting an own heat transfer coefficient in W/K. This coefficient is used to determine the heat loss and heat storage. The heat transfer coefficient is only asked for if the calculation method is performed in detail and according to method B.

Location

 EPG
The location of the storage tank is important as it is used to determine the heat loss.

§ Outside
The heat loss of the storage tank is determined with the outside air as ambient temperature.

§ Unheated space
The heat loss of the storage tank is determined with an ambient temperature in between the heated space and the outside air.

§ Heated space
The heat loss of the storage tank is determined with an ambient temperature equal to the heated space.

Volume

[dm³] EPG
The total volume of the storage tank of the solar energy system is specified here, expressed in dm³. The volume is used to determine the reduction factor for the yield of solar energy in PVT-systems, and to determine the correction factor for the efficiency of heat storage in systems with integrated reheating.

Volume of receivers for reheating

[dm³] EPG
The volume of the storage tank which includes the reheating is specified here, expressed in dm³. The volume is used to determine the energy storage losses in systems with integrated reheating.

Surface

[m²] EPG
This includes the net collector surface area of the solar water heater (only for solar water heater).