Hidrológiai Közlöny 2011 (91. évfolyam)
2. szám - Hovány Lajos: Impulzust keltő szeleppel kiegészíett vízmérő
26 HIDROLÓGIAI KÖZLÖNY 2011. 91. ÉVF. 2. SZ. A jeruzsálemi ARI-ban gyártott T10 és T20 jelzésű impulzust keltő szelepeknek a T30 jelzésű szeleptől kisebb a vízmérő pontosságára gyakorolt hatásuk. Irodalom Criminisi, A., Fontanazza, C. M., Freni, G., La Loggai, G. 2009 Evaluation of the apparent losses caused by water meter under-registration in intermittent water supply. Water Science & Technology- IVST 60(9), 2373-2382. http://www.iwaponline.com/wst/060Q9 /2373/ 060092373.pdf Davidesko, A. 2007 UFR - an innovative solution for water meter under registration. Case study in Jerusalem, Israel. Proceeding of the Water Loss 2007 Conference , Bucharest, September 23-26., 704709. http://waterloss2007.com/pdf_vortraege/Mittwoch/B9-3.pdf Fantozzi, M. Reduction of customer meter under-registration by optimal economic replacement based on meter accuracy testing programme and Unmeasured Flow Reducers. http://www.studiomarcofantozzi.it/Aprile09/Fantozzi%20AppLosse s%20WL09%20Paper%20Vl 1 %20250209.pdf Fantozzi, M., Criminisi, A., Fontanazza, C. M., Freni, G., Lambert, A. Investigations into under-registration of customer meters in Palermo (Italy) and the effect of introducing Unmeasured Flow Reducers http://www.arivalves.com/PDF/UFR/Fantozzi%20et%20Al%20Pal ermo%20case%20study%20V4%20030309.pdf Haas, B„ Barger, W. 2009 Wattsbar utility UFR pilot summ. 04.03.09. http://www.aymcdonald.com/lntranetSales/ufr/WATTSBAR%204_ 3_09.pdf Hovanj, L. 2010 Greska bilansiranja vode vodovoda pri manjem proticaju od Q m m - merena vodomerom. Voda i sanitarna tehnika 40(3), 35^2. Rizzo, A., Bonello, M., Galea St. John, S. 2007a Trials to Quantify and Reduce in-situ Meter Under-Registration. Proceeding of the Water Loss 2007 Conference, Bucharest, September 23-26., 695-703. http://www.arivalves.com/PDF/UFR/Trials%20to%20Quantify%20 and%20Reduce%20in-situ%20Meter%20Under-.pdf Rizzo, A., Vermersch, M„ Galea St. John, S., Micallef, G., Riolo, S., Pace, R. 2007b Apparent Water Loss Control. The way Forward. http://www.iwaom.org/datosbda/Descargas/48.pdf Yaniv, S. 2009 Reduction of Apparent Losses Using the UFR (Unmeasured-Flow Reducer). Case Studies. Efficient 2009 Conference , Sydney, October 25-29., 1-8. http://www.arivalves.com/PDF/UFR/Reductions%20of/o20Appare nt%20Losses.pdf A kézirat beérkezett: 2010. december 16-án Abstract: UFR Supported Water Meter Hovány, L. A test rig was set up in the Hydraulic Laboratory of the Faculty of Civil Engineering in Subotica (Republic of Serbia) to model two-outlet water supply systems (consumption was measured by water meters no. 2 and 3), with total flow rate lower than Q n. According to the applied pressure and flow, the system models the water supply pipeline of a single household. The rated diameter of water meters is 20 mm, manufactured by Potiski vodovodi /Tisa Region Waterworks/ Ltd. Horgos (Republic of Serbia). The caharacteristic water meter flow rates are: flow activating the water meter propeller (Q a) is between 0,0052 and 0,0067 m 3/h, Q mi n=0,05 m 3/h, Q,=0,2 m 3/h and Q n=2,5 m 3/h. Upstream to water meter no. 3 a UFR was installed, manufactured by A.R.I, from Jerusalem (Israel), having rated diameter of 20 mm, product type T30. Water supply system losses with discharges Q3<Q mi n are modelled at water meter no. 3. Water flow at water meter no. 2 was either Q 2=0 or Q m] n<Q 2<Q n. According to the measurements, the most significant contribution of the UFR in measuring water volume by a water meter of a single household is in the discharge range of Q a, just prior to activation of the water meter propeller: a) 70,47% at flow rates Q 2=0 and Q 3=0,005-0,0052 m 3/h, and b) 7,47% at flow rates Q 2=0,0559-0,0577 m 3/h and Q 3=0,0049-0,0050 m 3/h respectively. The T10 and T20 type UFRs have less influence on the accuracy of the water meter than the type T30. water supply fittings, water meter, Unmeasured-Flow Reducer (UFR). Key words: HOVÁNY LAJOS: a szabadkai Építőmérnöki Kar docense
