Example of calculations of heating costs
260 cubic meters heated volume x 0,055 kW / cubic meter specific heat load x 8 hours x 30 days x l / kWh specific heat price of fuel = heating costs per month
Fuel | Calorific value of fuel | Efficiency of the system | Real caloricity | Fuel price | Specific cost of heat | Heating costs of 100 sq. m/month |
Wood pellets | 4200kcal/kg
|
90% | 3780 kcal/kg
|
380,00BGN/t | 0,09BGN/kWh | 308.00 BGN |
Natural gas | 8000kcal/m3 | 88% | 7040 kcal/m3 | 918,00BGN/м3 | 0,11BGN/kWh | 377.50
BGN |
Propane-butane | 11950 kcal/kg | 87% | 10396 kcal/kg | 1800,00BGN/t | 0,15BGN/kWh | 514.80
BGN |
Electricity | 860 kcal/kWh | 98% | 843 kcal/kWh | 0,21BGN/kWh | 0,21BGN/kWh | 720.70
BGN |
Boiler Fuel – Coal | 9000 kcal/kg | 60% | 5400 kcal/kg | 1400,00BGN/t | 0,22BGN/kWh | 755.00
BGN |
Diesel fuel | 8526 kcal/kg | 86% | 7332 kcal/kg | 2080,00BGN/t | 0,24BGN/kWh | 823.70
BGN |
* The values are averaged for the conditions on the territory of Bulgaria and specific heat load is calculated for non-insulated buildings
* Prices are incl. VAT up to 30.04.2017