Numerical Modeling of The Effects of Reclamation and Proposed Infrastructures on Thermal Dispersion of Power Plant Wastewater at PLTGU Muara Karang, Jakarta Bay

Abstract Reclamation plan in Jakarta Bay close to the power plant cooling water discharge location. It will affect hot water distribution system and possibly increase water temperature around the power plant intake location. The increase in water temperature at the intake location will disrupt the operation of the power plant. The impact of hot water discharge to the intake location can be reduced by extending the intake channel and building barrier walls as planned by the Muara Karang Power Plant. Modeling is done with 3 scenarios, namely the existing condition, the existence of the reclamation island, and the proposed infrastructure around the power. This modeling aims to determine the effect of the reclamation island on heat distribution, especially around the intake location and the effectiveness of the infrastructures in minimizing the problem. Simulation for the east and west monsoons is done in 3 dimensions with MIKE3 Flow Model FM (DHI) by applying temperature function. Overall, the presence of reclamation island will increase the average temperature at the intake by 0.32 to 0.7°C compared to the existing conditions, and the proposed infrastructure is quite effective to reduce the temperature at the intake by 0.5 to 0.8°C.