Technical data

8 | Project planning manual for heat pumps for heating and domestic hot water preparation | 01.2012 www.dimplex.de
Energy content of various types of fuel
Greek alphabet
Energy content of various types of fuel
Conversion tables
Energy units
Power units
Pressure
Length
α Α alpha ι Ι iota ρ Ρ rho
β Β beta κ Κ kappa σ Σ sigma
γ Γ gamma λ Λ lambda τ Τ tau
δ Δ delta μ Μ mu υ Υ ypsilon
ε Ε epsilon ν Ν nu ϕ Φ phi
ζ Ζ zeta ξ Ξ xi χ Χ chi
η Η eta ο Ο omicron ψ Ψ psi
ϑ θ theta π Π pi ω Ω omega
Fuel
Heating value
1
H
i
(H
u)
1. The heating value Hi (formerly H
u
)
The heating value H
i
(also called the lower heating value) is the thermal energy which is released during total combustion when the steam produced during combustion is dis-
charged without being utilised.
Calorific value
2
H
s
(H
o
)
2. Calorific value Hs (previously H
o
)
The calorific value H
s
(also called the upper heating value) is the thermal energy which is released during total combustion when the steam produced during combustion conden-
sates so that the heat of evaporation is thus available for use.
max. CO
2
emission (kg/kWh) based on
Heating value Calorific value
Coal 8.14 kWh/kg 8.41 kWh/kg 0.350 0.339
Heating oil EL 10.08 kWh/l 10.57 kWh/l 0.312 0.298
Heating oil S 10.61 kWh/l 11.27 kWh/l 0.290 0.273
Natural gas L
8.87 kWh/m
n
3
9.76 kWh/m
n
3
0.200 0.182
Natural gas H
10.42 kWh/m
n
3
11.42 kWh/m
n
3
0.200 0.182
Liquid gas (propane)
(ρ = 0.51 kg/l)
12.90 kWh/kg
6.58 kWh/l
14.00 kWh/kg
7.14 kWh/l
0.240 0.220
Current --- --- 0.200
Unit J kWh kcal
1 J = 1 Nm = 1 Ws 1
2.778 * 10
-7
2.39 * 10
-4
1 kWh
3.6 * 10
6
1 860
1 kcal
4.187 * 10
3
1.163 * 10
-3
1
Specific heat capacity of water: 1.163 Wh/kg K = 4.187 J/kg K = 1 kcal/kg K
Unit kJ/h W kcal/h
1 kJ/h 1 0.2778 0.239
1 W 3.6 1 0.86
1 kcal/h 4.187 1.163 1
bar Pascal Torr Water column
1 100,000 750 mm HG 10.2 m
Metre Inch Foot Yard
1 39.370 3.281 1.094
0.0254 1 0.083 0.028