4 results on '"Water losses"'
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2. GUBICI VODE U VODOOPSKRBNOM SUSTAVU.
- Author
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Užar, Josip
- Subjects
TELEMETER ,WATER meters ,WATER supply ,HYDRAULICS ,SUPERVISORY control systems ,EQUIPMENT & supplies - Abstract
Copyright of Technical Journal / Tehnički Glasnik is the property of Polytechnic of Varazdin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
3. Usporedba različitih načina iskazivanja vodnih gubitaka uz osvrt na hrvatsku praksu
- Author
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Dražen Vouk, Tea Martinac, and Domagoj Nakić
- Subjects
vodni gubitci ,ILI pokazatelj ,ekonomska vrijednost gubitaka ,IWA metodologija ,water losses ,ILI indicator ,economic value of losses ,IWA methodology - Abstract
U današnje se vrijeme u svijetu koriste različiti načini iskazivanja vodnih gubitaka u vodoopskrbnim sustavima. Najčešće je iskazivanje postotnog udjela u odnosu na zahvaćene količine, zatim izračun stvarnih i prividnih gubitaka u sklopu standardne bilance vode i izračun ILI (eng. Infrastructure Leackage Indeks; hrv. Infrastrukturni indeks curenja) pokazatelja sukladno IWA (eng. International Water Association) metodologiji. ILI pokazatelj predstavlja odnos stvarnih i neizbježnih količina vodnih gubitaka na razini jedne godine. U radu je dan kritički osvrt na pouzdanost ILI pokazatelja pri analizi vodnih gubitaka. Na konkretnim primjerima je dokazano da na temelju ILI pokazatelja nije pouzdano donositi konkretne zaključke o stanju vodnih gubitaka, kao i o definiranju mjera unaprjeđenja cjelovitih sustava ili pojedinih DMA zona (eng. District Metering Area; hrv. Izdvojena mjerena zona). U analizi vodnih gubitaka se osim izračuna ILI pokazatelja koriste i različiti načini iskazivanja i vrednovanja vodnih gubitaka (l/(priključak∙dan), m3/(km cjevovoda∙dan), l/(priključak∙dan∙mVS), m3/(km cjevovoda∙dan∙mVS), HRK/godina i dr.). S ciljem iznalaženja što jednostavnijeg i pouzdanijeg načina iskazivanja vodnih gubitaka, u ovom su radu, na konkretnih pet primjera vodoopskrbnih sustava u Hrvatskoj, analizirani odnosi različitih načina iskazivanja vodnih gubitaka. Zaključuje se da je najpraktičnije i najučinkovitije provođenje ekonomskih analiza vodnih gubitaka s izražavanjem vodnih gubitaka u HRK/godina, kako za sustav u cjelini, tako i za svaku DMA zonu posebno., There are different methods for expressing water losses in water supply systems, which are presently used in the world. Water losses are most frequently expressed as a percentage of abstracted water quantity, a calculation of real and apparent losses as part of the standard water balance and calculation of the Infrastructure Leakage Index (ILI) according to the International Water Association (IWA) methodology. The ILI presents the relation between the real and unavoidable annual water losses. The paper offers a critical review of the reliability of the ILI in the analysis of water losses. By using specific examples, the paper proves that it is not reliable to draw concrete conclusions about the state of water losses or to define measures for improving integrated systems or individual district metering areas (DMAs) based on the ILI. In addition to the ILI calculation, numerous other methods of expressing and assessing water losses are also used, such as l/(connection per day), m3/(km pipeline per day), l/(connection per day mWC), m3/(km pipeline per day mWC), HRK/year, etc. In order to find the simplest and most reliable method for expressing water losses, this paper analyses relations between different methods for expressing water losses on five specific water supply systems in Croatia. It has been concluded that the most practical and efficient performance of economic analyses of water losses is when water losses are expressed in HRK/year, both for the system as a whole and separately for each individual DMA.
- Published
- 2017
4. Gubici vode u vodoopskrbnom sustavu
- Author
-
Josip Užar
- Subjects
water losses ,reduce losses ,telemetry system form remote monitoring ,water meters ,gubici vode ,smanjenje gubitaka ,telemetrijski sustav za daljinski nadzor ,vodomjeri - Abstract
U radu je analizirana problematika vodoopskrbnih sustava sa stanovišta neekonomičnosti i neracionalnosti u pogledu gubitaka vode. Prikazan je uređaj za mjerenje protoka te su pokazane metode pronalaženja gubitaka. Nadzorno-upravljački sustav predstavlja ekonomski optimalno i tehnički fleksibilno rješenje u održavanju postojećih i budućih vodoopskrbnih poduzeća, a zauzima važno mjesto u radu sustava. Također su dane smjernice pristupa koji dovodi do smanjenja gubitaka, kao i osnovne informacije o IWA metodologiji vođenja bilance., This paper analyzes the issue of water supply systems from the point of irrationality and uneconomical in terms of water losses. With the basic display devices for measuring flow, detailed view is givenin the methods of finding the losses. The supervisory control system is technically flexible and economically optimal solution to maintain existing and future water supply companies, and occupies an important place in the work of system. Also, is given approach that leads to a reduction in losses and basic information on the IWA methodology of keeping balance.
- Published
- 2012
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