Gas Turbine Central Plant

The gas turbine central plant burns gas to co-generate steam and electricity. The steam can then be used in a steam turbine to co-generate electricity and heat.

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_el_max	Maximum electrical power output.	inf	kW	float
force_cap_max	Force implementation of maximum capacity specified in kW_el_max. Only relevant for optimisation.	False	kW	bool
cap_min_use	Minimum capacity to use.	0	kW	float
hv_gas_MJpkg	Heating value (lower) of gas	46	MJ/kg	float
eta_el	Electrical conversion effiency.	0.35	—	float
htp_ratio	Heat-to-power (htp) ratio (kW_th/kW_el)	1.5	kW_th/kW_el	float
co2_intensity	Carbon-dioxide intensity of technology output (annual average value).	0.645	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.	5000	CHF/kWp	float
maintenance_cost	OPEX cost of technolgoy per unit of capacity	40.1	CHF/kWp/year	float
interest_rate	Interest rate for computing levelised costs (if required).	0.025	—	float

The relationship between the in- and outflows is given by

\[\mathtt{v\_e\_gtcp} = \mathtt{eta\_el} \cdot \mathtt{u\_gas\_gtcp}\]

\[\mathtt{v\_steam\_gtcp} = \mathtt{htp\_ratio} \cdot \mathtt{eta\_el} \cdot \mathtt{u\_gas\_gtcp}\]

The symbols and names of the flows are

v_h_st_gtcp_waste	Waste Heat (via steam turbine)
u_gas_gtcp	Inflow Gas
v_e_gtcp	Outflow Electricity
v_steam_gtcp	Outflow Steam