Table of Contents
Advertisement
Description
SITRANS FUE950 is a universal thermal energy calculator, which meets the requirements of
EN1434 and has the MID approval for heat metering.
The SITRANS FUE950 energy calculator has been developed for Siemens Flow
Instruments.
Further, the energy calculator has been specially developed to receive volume pulses from
flowmeter type SITRANS FUS380/FUE380 or alternatively SITRANS F M MAG 5000/6000
transmitter. Typically it is used with the SITRANS F US flowmeter programme for energy
custody transfer in district and central heating systems, in which the medium is water with
temperatures up to 190 °C, or in cooling systems using water as coolant.
The energy calculator is modular in construction and can be fitted with optional modules
depending on the application. SITRANS FUE950 can be used for up to 9 999.9 m
3.1
Measuring principle
Energy calculation
Calculation of energy is based on the following formula:
Energy = Volume x (T
Volume: Volume [m
SITRANS FUE380)
T
Hot
T
Cold
K-factor
The energy calculation is made by a counter and depends on temperature difference, pulse
input frequency and legal requirements.
The calculator always carries out at least one energy calculation every 2 sec. If connected
flowmeter has not sent enough pulses, energy calculation and flow indication is also based
on the 2 sec. value.
SITRANS FUE950
Operating Instructions, 01/2010, SFIDK.PS.022.F4.02
- T
Hot
] of a given number of volume pulses from the flow meter (e.g.
3
: Measured temperature in hot line (by the one of the Pt500 sensors)
: Measured temperature in cold line (by the other Pt500 sensor)
: Thermal coefficient of media enthalpy and heat content (typical media is water)
(Ti)
) x K-factor
Cold
(Ti)
3
/h.
3
11
Hide quick links:
Advertisement
Table of Contents
