ANALISIS TRANSIEN PENSTOK: PENGARUH WAKTU PENUTUPAN

Abstract

Hydroelectricity is eligible energy resource to be developed in the future because of a variety of advantages.
Hydropower potential on a river in North Sulawesi has been known for a long time. With rising electricity
demand today, the potential energy of the water will soon be realized into hydropower. Existing site conditions
do not allow for the use of surge tanks as dampening device for water hammer effects. This research
willperform transient and water hammer analysis as basic of the penstock design and turbine selection. Water
hammer transient analysis was carried out with varying the main valve closure time from 5 s, to 120 s. It can be
concluded that the sharp decrease water hammer effect on the main valve closure time will end when the
closure time was 30 s. After that, decrease water hammer parameters were no longer significant.
Keyword : transien, penstok, water hammer, waktu penutupan.