Izvleček
Predstavljeni so teoretični temelji za obravnavo diferencialnih vodostanov različnih oblik, pri katerih kombiniramo elemente: jašek, diferencialno komoro, dušilko diferencialne komore, dušilko med dovodnim rovom in jaškom ter spodnjo cilindrično komoro. Z uporabo temeljnih enačb za opis naštetih elementov smo sestavili več modelov diferencialnih vodostanov, od katerih je podrobno opisan najsplošnejši, DICHTANK. Prikazana je tudi njegova prva kontrola. Zaradi pomanjkanja merjenih rezultatov z obstoječih objektov smo jo izvedli z rezultati dveh podobnih matematičnih modelov. Ujemanje naših in primerjalnih rezultatov je v obeh primerih zelo dobro. Na koncu je prikazan še primer uporabe modela DICHTANK za oceno vpliva premera in hrapavosti dovodnega rova na dimenzije vodostana za načrtovano HE Moste II na Savi.

Ključne besede: diferencialni vodostan, matematični model, verifikacija, HE Moste II
Originalni znanstveni članek   UDK 519.87:627.8.034

Abstract
The paper brings a necessary theoretical background for the elaboration of differential surge tanks consisting of some basic elements: riser, differential chamber, differential chamber throttle, bottom throttle and bottom classical cylindrical chamber. By application of basic equations, some models of the differential surge tanks have been constructed, but only the most generalized, DICHTANK (DIfferential and CHamber surge TANK), presented herein. Since no measured data were available for verification, the results of two independent mathematical models were used instead. In both cases, there was a very good agreement between our results and the reference results. Finally, the application of DICHTANK, where the headrace tunnel diameter and roughness were varied in order to obtain optimal design for the surge tank for the planned Moste II HPP on the Sava River is presented.

Key words: differential surge tank, mathematical model, verification, Moste II HPP
Scientific paper   UDK 519.87:627.8.034