Naslov
Pump Startup Analysis in Fužine Reversible Hydropower Plant Using 1D Open Channel Flow Model

Autori
Družeta, Siniša ; Sopta, Luka ; Črnjarić-Žic, Nelida ; Škifić, Jerko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 5th DAAAM International Conference on Advanced Technologies for Developing Countries / Tonči Mikac, Branko Katalinić - Rijeka : Tehnički fakultet Sveučilišta u Rijeci, 2006, 63-68

Skup
5th DAAAM International Conference on Advanced Technologies for Developing Countries

Mjesto i datum
Rijeka, Hrvatska, 28.06.2006. - 30.06.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pump start-up; reversible hydropower plant; open channel flow

Sažetak
Fužine reversible hydropower plant is situated in Croatian region of Gorski kotar and is connected with lake Bajer by an open channel called the "inlet/outlet channel" which functions as an inlet channel when the plant works in the pumping regime. The inadequate inlet/outlet channel design causes the abrupt water level drop in inlet/outlet channel during pump start up. Combined with initially low inlet water levels, this inlet water level drop causes temporary improper pump operation with cavitation, which eventually could lead to pump failure. In order to analyze the effects of pump start up rapidity on water levels in the inlet/outlet channel, 1D open channel flow model was used with first order upwind Q Scheme as implemented in the software package Stripp12. Model validation was performed with the unsteady simulation of a native pump start up scenario for which the computed water levels were compared with the measured water levels at the gauge points in the inlet/outlet channel. Further unsteady simulations with various pump start up dynamics were carried out, results of which illustrate the strong influence of pump start up dynamics on the abrupt drop of the inlet/outlet channel water levels where slower start ups result in reduced water level drops. Moreover, the use of slow start up allows for the pumping at minimum initial water levels in the inlet/outlet channel, which provides the realization of full pumping capacity and ensures maximum plant efficiency.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti

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