A boiler model consisting of physical components.The efficiency is based on the part load rate and the inflow water temperature.
Assumptions for predefined parameter values (based on
Vissmann data cheat):
G: a heat loss of 0.3 % of nominal power at a temperature difference of 50 K to ambient is assumed.
C: factor C/Q_nom is in range of 1.2 to 2 for boilers with nominal power between 460 kW and 80 kW (with c of 500J/kgK for steel). Thus, a value of 1.5 is used as default.