MULTICAL®
602
36
Kamstrup
A/S
∙
Technical
Description
∙
5512
‐
931_N1_GB_11.2016
602-C
Application No. 11
Two-stage boiler system with 1 flow meter
Boiler energy „B“: E3 = V1 (T2-T1)k
T1:Outlet
Boiler energy „A“: E4 = V1(T1-T3)k
T1:Inlet
6.2.2
E8 and E9
E8 and E9 are used as calculation basis for calculating volume based average temperatures in inlet and outlet pipe,
respectively. For each integration (every 0.01 m
3
for qp 1.5 m
3
/h) the registers are accumulated with the product of
m
3
C, for such purposes E8 and E9 is a suitable basis for calculating volume based average temperatures.
E8 and E9 can be used for average calculation in any period of time as long as the volume register is read at the
same time as E8 and E9.
E8= m
3
t
F
E8 is accumulated with the product of m
3
t
F
E9 = m
3
t
R
E9 is accumulated with the product of m
3
t
R
Resolution on E8 and E9
E8 and E9 are depending on the volume
resolution (m
3
)
Volume resolution
E8 and E9 resolution
0000.001 m
3
m
3
C
10
00000.01 m
3
m
3
C
000000.1 m
3
m
3
C
0.1
0000001 m
3
m
3
C
0.01
Example 1:
After 1 year a heat installation has consumed 250.00 m
3
of district heating water and the
average temperatures have been 95
C in inlet and 45
C in outlet pipe.
E8 = 23750 and E9 = 11250.
Example 2:
It is required that the average temperatures are measured at the same time as the yearly
reading, and therefore E8 and E9 are included in the yearly reading.
Reading date Volume
E8
Average
inlet
E9
Average
outlet
2003.06.01 534.26
m
3
48236
18654
2002.06.01 236.87
m
3
20123
7651
Yearly
consumption
297.39 m
3
28113
28113/297.39
= 94.53
C
11003
11003/297.39
= 36.99
C
Table 1