Heat Pump Central Plant - From Low Temperature

The heat pump central plant represents a large scale heat pump connected to the district heating network. It supplies directly useful heat. The heat pump is fed by low-temperature heat, which is currently just available from the technology waste heat (low temperature). It converts low-temperature heat into useful heat. Its COP is a constant.

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_th_max	Maximum thermal power output	inf	kW	str
force_cap_max		False	—	bool
cap_min_use		0	kW	float
cop		8	—	float
co2_intensity	Carbon-dioxide intensity of technology output (annual average value).	0 *(emissons allocated to electricity tech)*	kg CO2/kWh	int
lifetime	Expected lifetime of technology before replacement is required.	25	years	int
capital_cost	CAPEX cost of technology per unit of capacity.	2000	CHF/kW	float
maintenance_cost	OPEX cost of technology per unit of capacity.	10	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

\[\mathtt{v\_h\_hpcplt} = \mathtt{COP} \cdot \mathtt{u\_e\_hpcplt} = \mathtt{u\_e\_hpcplt} + \mathtt{u\_hlt\_hpcplt}\]

The symbols and names of the flows are

u_e_hpcplt	Inflow Electricity
v_h_hpcplt	Outflow Heat
u_hlt_hpcplt	Inflow Heat (Low Temperature)