Economic effects

Installing and exploitation of straw boilers gives not only ecological effects but also serious economic ones. It is fully profitable investment.

According to the building projects of boiler-rooms with our straw boilers and users opinions the costs of installing the boiler returns in 2-5 years. It depends on size of the boiler-room, intensity of using the boilers and price of the straw etc. The most profitable situation is when users have their own straw, i.e. Mr. Tadeusz Tarach, farmer from Chrzelice, Opolskie that uses biomass boiler EKOPAL RM for 12 seasons says that his investment returned after only three years. President of Cooperative Agricultural Plant In Świerkówki (Wielkopolskie), where biomass boiler EKOPAL RM 02 is installed says that his investment returned after only 2 years.

Users that don’t have own straw sources and who are buying it also confirms the cost-effectiveness. In 2nd Primary School in Milicz (Dolnośląskie) 3 biomass boilers EKOPAL RM 02 are installed. Total power provided is 1.200kW. According to what school’s director says in first heating season the exploitation cost (including straw price) of the boiler was about 60 000 zł. Comparing it to the season before when school used heating from the city it is 200 000 zł less. The costs return takes 4-5 years.

 

 

CALORIFIC VALUE OF DIFFERENT FUELS AND COST OF PRODUCTION OF 1 kWh HEAT ENERGY

Fuel type Measur. unit Calorific value kJ/unit Unit price PLN/unit Price 1) kWh 2) PLN/unit Efficiency Price PLN/kWh
Fuel oil l 35610 1,50 0,15 92% 0,16
Liquid gas l 25848 1,20 0,16 92% 0,17
Natural gas GZ-50 m3 34440 1,02 0,10 92% 0,11
Natural gas GZ-35 m3 25250 0,81 0,11 92% 0,12
Straw / wood 3) kg 14000 0,04 0,01 82% 0,01
Straw / wood 4) kg 14000 0,10 0,025 82% 0,03
Fine coal kg 20000 0,28 0,05 82% 0,06
Coal 5) kg 25000 0,45 0,06 40% 0,16
Heat pump 1kWh/5kWh 6) 0,37 0,07 100%

0,07


  1. Cost of fuels according to prices on 22.01.2002;
  2. 1 kWh = 3600 kJ;
  3. Straw humidity 16% - straw price according to harvest cost;
  4. Straw humidity 16% - straw price according purchase price (market price)
  5. Efficiency of existing boilers;
  6. Efficiency of conversion of electric energy - from 1 kWh we obtain 5 kWh of heat energy