Based on the Agreement between the investors "VAMED Standortentwicklung und Engineering GmbH” Wien Österreich, and the contractor “NMAqua” s.p. Banja Luka, measurements were made on the hot spring of the University Clinical Center of the Republic of Srpska in Banja Luka.
According to the investor's request for the needs of the "TEB Banja Luka" Project, we measured the flow and temperature on the hot water pipes in the thermal substation in the Technical Block of the UKC Banja Luka. The measurement had to be carried out continuously for 21 days during the entire 24 hours.
Dy measuring the flow and temperature, as well as the amount of delivered thermal energy, three pairs of pressure-return hot water pipes, i.e. six pipes, are included, which serve with thermal energy the hospital department "Infectious", department "Gynecology" and department "Central Medical Block" (CMB).
After the preparatory works and the provision of electricity sources, the preparation of the hot water pipe was carried out by cleaning at the place of installation of the probes for measuring the flow, as well as the probes for measuring the temperature. Metal clamps and fixed probes were placed, and the connection to ultrasonic flow and temperature meters was made. During these measurements, six ultrasonic (UZ) meters were used AQF 2000. Three UZ meters were used to measure the flow, while three meters were used to measure the temperature, in such a way that each meter with two probes measured the temperature on the pressure and return hot lines for a specific department.
The flow measurement was performed on the return hot water pipe, based on the recommendation of the manufacturer of the measuring instruments and previous measurement experiences. The reason is that an even flow of fluid in the pipe was achieved on the return hot line, that is laminar calm flow, uniform and without turbulence in parallel layers, without mixing between them, in contrast to the pressure hot water pipeline, where the flows are turbulent, and the speeds are much higher and variable due to the close proximity of the pumps. Also near the pumps a certain percentage of liquid cavitation occurs, i.e. discontinuities or "cavities" (steam bubbles in water) appear in the liquid stream, which negatively affect the measurement accuracy.
After the measurements were completed, the Elaborate on the measurement of temperature, flow and quantity of delivered thermal energy was prepared, which was forwarded to the Investor in electronic and printed form.
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