MAXICAL
®
III 5511-229 GB/98.06/Rev. B1
50
E
MJ
=m
3
x Dt x k
STUCK
[MJ]
E
GJ
= [GJ]
E
kWh
= [kWh]
E
MWh
= [MW]
m
3
is the water quantity recorded (or simulated) during
verification. E.g., if MAXICAL
®
III has a Qn 1.5 m³/h flow
meter and a CCC code of 119, the integrator will be pro-
grammed to receive 100.0 volume pulses pr. litre.
If 10,000 volume pulses are registered during verification,
this would correspond to 10,000/100.0 = 100 litres - or
0.1 m³.
Dt is the difference between flow and return temperatures (t
F
-
t
R
). Regardless of whether the verification is performed with
sensors in a liquid bath or with precision resistors, the
temperatures must be entered accurately.
k
STUCK
is the water’s thermal coefficient - which can be seen in
“Tabellen von Wärmekoeffizienten für Wasser als
Wärmeträgermedium”, published in 1986 by
Wirtschaftverlag NW.
Note that to use this reference book, the following informa-
tion is required:
- Flow temperature, t
F
- Return temperature, t
R
- Flow meter location: flow or return
- Plant pressure 16 bar
EMJ
1000
EMJ
3,6kk
EMJ
3600
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