From: Upscaling a district heating system based on biogas cogeneration and heat pumps
Term | Signification (unit: €/year) |
---|---|
P E,grid,sell | Profit made on electricity sold to the grid |
P Q,dh,h | Profit made on heat sold through the DH network |
P Q,hp,h | Profit made on heat sold to houses fitted with a heat pump |
P Q,dh,c | Profit made on cooling sold through the DH network |
P Q,hp,c | Profit made on cooling sold to houses fitted with a heat pump |
C E,grid,buy | Costs of electricity bought from the grid |
C biogas | Costs of biogas supply to the DH system |
C ngas | Costs of natural gas supply to the DH system |
C cap,j | Capital costs of investments and required future re-investments into specific equipment type j |
C op,j | Operational costs (operator, maintenance, insurance, etc) of specific equipment type j |
chp, b, hp, stochp,stohp | Specific equipment: CHP, boiler, heat pump, storage related to the CHP, storage related to the heat pumps |