MULTICAL® 801
Kamstrup A/S · Technical Description · 5512-571_R1_GB _11.2016
33
6
Calculator functions
6.1
Energy calculation
MULTICAL
801 calculates energy based on the formula stated in EN 1434-1:2007, which uses the international
temperature scale issued in 1990 (ITS-90) and the pressure definition of 16 bar.
In a simplified form, the energy calculation can be expressed as Energy = V x
∆Θ
x k.
The calculator always calculates energy in
[
Wh
]
, and then converts the value to the selected measuring unit.
E
[
Wh
]
=
V
x
∆
Θ
x
k
x
1000
E
[
kWh
]
=
E
[
Wh
]
/ 1,000
E
[
MWh
]
=
E
[
Wh
]
/ 1,000,000
E
[
GJ
]
=
E
[
Wh
]
/ 277,780
E
[
Gcal
]
=
E
[
Wh
]
/ 1,163,100
V
is the added (or simulated) water volume in m
3
. If e.g. the CCC-code = 119 is used, the calculator has been
programmed to receive 100 imp./litre. If for instance 10,000 pulses are added, this corresponds to
10,000/100 = 100 litres or 0.1 m
3
.
∆Θ
is he measured temperature difference, e.g.
∆Θ
= inlet temperature – outlet temperature. Please note that
different temperatures are used for the calculation of
∆Θ
as MULTICAL
801 can calculate various different
energy types. Both in the display and during data reading each energy type is uniquely defined, e.g.
Heat energy: E1 = V1(T1-T2)k
Cooling energy: E3 = V1 (T2-T1)k
k
is the heat coefficient of water which is calculated on the basis of the formula stated in EN 1434-1:2007
(identical with the energy formula of OIML R75-1:2002). For checking the measurement, Kamstrup can
supply an energy calculator:
