T: +386 1 759 08 00
F: +386 1 759 08 01
Our range of activities include: technical design, distribution, installation, and maintenance of water-supply, sewage, and measuring/control systems with a 24-h technical support.
Installation of thermal energy meters is possible only in closed-circuit heating/cooling systems. The supply line and the return line of the heat-consumer loop form a circle, e.g.:
In relation to purpose of use, the thermal energy meters take on two different roles:
a) As heat cost allocators on the secondary side, usually in multi-flat residential buildings or business facilities with multiple users
b) As primary meter in teleheating systems with or without heating sub-stations
The transferred heat for heating/cooling is calculated as follows:
∆H = k(T) x QV x ∆T x ∆t
∆H = change in enthalpy, transferred heat, e.g.: kWh, MJ
k(T)= heat transfer coefficient (also "k-factor"); approx. 1.16 MWh/m3/K or 4.18 MJ/m3/K for water; same density [kg/m3] multiplied by the specific heat of the medium [kJ/kg/K], depending on the absolute temperature of the supply line and the return line,
QV = volumetric flow rate of a medium, e.g.: l/h, m3/h,
∆T = difference between the supply line temperature and the return line temperature,
∆ t = measured time interval, e.g. in: h (hours), minutes, days.
In practice, we may come across two designs of thermal energy meters:
Our sales range also includes equipment by a Suisse manufacturer Sontex SA which, in addition to mechanical, also develops thermal energy meters using the so-called "Fluidic Oscillator" principle. This principle enables incredibly stable and long-term measurements with high accuracy; the measuring module does not contain any movable parts which could be subject to failure in case of unfavourable/demanding operating conditions.
List of all groups:
CMC GROUP d.o.o.
IOC Zapolje I/10
SI-1370 Logatec
T: +386 1 759 08 00
F: +386 1 759 08 01
E: info@cmc-group.si