Statistical Simulation of Condenser Outflow Discharge as Renewable Energy Potential for Hydropower at UP Gresik
Afriono Subekti Romadhon, Rachmawan Budiarto, Kusnanto

Magister Teknik Fisika, Universitas Gadjah Mada, Yogyakarta, Indonesia

Abstract

This study investigates the renewable energy potential of condenser outflow discharge at UP Gresik, a major power generation facility in East Java, Indonesia. In response to increasing operational expenditures due to high purchased electricity consumption, this research evaluates the feasibility of utilizing discharged condenser water-typically released untreated into the environment-for hydropower generation. Historical operational data from circulating water pumps (CWPs) across steam and gas-steam units were analyzed using multiple linear regression to estimate discharge flow rates. A Monte Carlo simulation was conducted to assess uncertainty under varying plant loads. The findings indicate consistent discharge profiles suitable for small-scale hydropower, yielding a total combined output of up to 900 kW under typical operational conditions. These results support the integration of such systems as a renewable energy solution aligned with Indonesia^s national energy transition goals.

Keywords: Micro Hydropower, Condenser Outflow, Monte Carlo Simulation, Regression Analysis, Thermal Power Plant, Renewable Energy

Topic: New and Renewable Energies