VERIFICATION OF CO<sub>2</sub> REDUCTION AND COST SAVINGS EFFECTS BASED ON OPERATIONAL INDICATORS IN OPTIMAL OPERATION PLANNING FOR HEAT SOURCE SYSTEMS

This study evaluates the CO2 reduction potential of optimal heat source operation using market price-linked electricity tariffs compared with dynamic CO2 emission intensity. A heat source system model was developed using operational data from an existing building, and simulations for 2024 were conducted for baseline operation, dynamic CO2-based operation, and electricity price-based operation. Price-based operation achieved a 4.9% cost reduction and a 7.7% CO2 reduction compared with baseline operation. Dynamic CO2-based operation achieved a higher CO2 reduction (13.3%) but increased cost by 4.0%. CO2 reduction by price-based operation corresponded to 58% of that obtained with dynamic CO2-based operation.