MULTICAL® 403
Kamstrup A/S · Technical description · FILE100000166_B_EN-55121689_M1_07.2023
In case of failing temperature sensor or flow measurements the counting stops in the registers, which are influenced
by the error. Furthermore, the displayed reading in question will include lines.
7.2 Measurement of the coefficient of performance (CP) of a heat pump
In houses with heat pumps with an output it is expedient to measure both the released thermal energy and the
gained electrical energy, based on which the coefficient of performance (COP or CP) can be calculated. COP is the
abbreviation of ”Coefficient Of Performance”.
The calculation is based on simple proportional numbers between calculated thermal energy (E1) and electrical
energy, which is measured via pulse input B (Input B):
=
[1]
[
]
Electrical energy (Input B) is always registered in kWh, whereas thermal energy (E1) is either registered in kWh,
MWh or in GJ depending on the selected B-code. No matter which unit you choose the meter calculates CP correctly.
The CP value is displayed with one decimal and is a value in the interval 0,0…19,9.
The CP value can be displayed as a current value, a monthly value or a yearly value. In addition the averaging period
of the current CP-value as well as the current power measured at input B can be displayed.
• Current CP is averaged over a number of days and nights determined by the meter’s configuration. The
averaging period can be selected in the interval 5…30 days. The averaging period is set at 7 days, unless
otherwise stated by the customer.
Note: If data of E1 or input B are missing for a logging period, current CP is displayed as 0,0 until the data basis is
sufficient.
• The monthly values are calculated as the average of a full month. The month is determined by the selected
target date.
• The yearly values are calculated as the average of a full year. The year is determined by the selected target date.
To Next Page
Loading...
Need help?
General
