- 8 -
performed by a well qualified plumbing welder who is well
acquainted with this manual and boiler design
- 17 -
KALVIS-2-16, 2-25, 2-30, 2-40 en 2009.05.18
- oak wood
- 500 kg;
- birch wood
- 450 kg;
- fir wood
- 330 kg;
- asp wood
- 330 kg.
The higher wood humidity – the less calorie value. Decrease in
calorie value of humid wood in comparison to 20% humidity wood:
- 30 % humidity
- 10
÷
15 %;
- 50 % humidity
- 35
÷
40 %.
Fresh cut tree has about 35
÷
60 % water. Wood cut in the
beginning of winter or hard wood has least water.
Peat and wood calorie value is similar.
1 kg of coal gives 2
÷
3 times more heat than 1 kg of wood.
Combustion of 1 kg of wood requires 4
÷
5 m3 of air, coal –
around 10 m3.
The more ash is left – the worse fuel is.
Energy radiation from combusting 1 dm3 of wood of 20 %
humidity:
Wood type
Kcal
Kwh
Comparison to oak %
Oak, maple
2520
2,93
100 %
Ash 2460
2,86
98
%
Birch 2270
2,64
90
%
Alder
1900
2,21
75 %
Pine
1850
2,15
73 %
Asp 1810
2,10
72
%
Polar 1680
1,95
67
%
Fir 1610
1,87
64
%
Average coal caloric value 6500 kcal/kg (7,56 kWh/kg).
8.
Receipt note
Central heating boiler "Kalvis-2-____" factory No._________
conforms with manufacturing drawingsand is fit for service.
Manufacturing date
______________________
Quality manager
__________________________
Summary of Contents for K-2-16
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