Wood Boiler Steam Generator

The wood boiler central plant is a large-Scale wood boiler attached to the district heating network. It converts wood into hot steam. The steam can then be used in a steam turbine to co-produce heat and electricity.

Attribute	Description	Standard value	Unit	Data type
deployment	If set to ‘true’, the technology will be considered in the energy system model (this does not necessarily mean it will be used). Only relevant for optimisation.	False	—	bool
kW_h_max	Maximum power output in the form of steam	inf	kW	str
force_cap_max	Force implementation of maximum capacity specified in kW_h_max. Only relevant for optimisation.	False	—	bool
wood_input_cap_type		free		str
wood_input_cap_kg		112000000		float
cap_min_use		0	kW	float
hv_wood_MJpkg	Lower heating value of wood.	15	MJ/kg	float
eta	Conversion efficiency from wood to heat.	0.8	—	float
wood_price_CHFpkg	Wood price (annual fixed value).	0.5	CHF/kg	float
co2_intensity	Carbon-dioxide intensity of technology output (annual average value).	0.027	kg CO2/kWh	float
lifetime	Expected lifetime of technology before replacement is required.	25	years	int
capital_cost	CAPEX cost of technology per unit of capacity.	4500	CHF/kW	int
maintenance_cost	OPEX cost of technology per unit of capacity	5	CHF/kW/year	int
interest_rate	Interest rate for computing levelised costs (if required).	0.025	—	float

The relationship between the in- and outflows is given by

\[\mathtt{v\_steam\_wbsg} = \mathtt{eta} \cdot \mathtt{u\_wd\_wbsg}\]

The symbols and names of the flows are

v_h_st_wbsg_waste	Waste Heat (via steam turbine)
v_steam_wbsg	Outflow Steam
u_wd_wbsg	Inflow Wood