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Simulation of Thermal Dispersion in Location of Development of Diesel Power Plant Using Computational Fluid Dynamics Methods

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IOP Conference Series: Materials Science and engineering 2021年第1期1096卷

作者： M.S.K.T. Suryo E. Yohana T. Restiana R. Gunawan K. Rozi Lecturer in Mechanical Engineering S-1 Study Program Faculty of Engineering Diponegoro University Jl. Prof. Sudharto SH. Street Tembalang-Semarang Central Java Indonesia Bachelor of Engineering Study Program Students Faculty of Engineering Diponegoro University Jl. Prof. Sudharto SH. Street Tembalang-Semarang Central Java Indonesia Student in Mechanical Engineering S-1 Study Program Faculty of Engineering Diponegoro University Jl. Prof. Sudharto SH. Street Tembalang-Semarang Central Java Indonesia

Electrical energy is one of the important energy needs in human life. To meet the electricity needs in the North Maluku area, it was planned to build a diesel power plant (PLTD) in the coastal area of Halmahera. In the activity of the power plant, it produces heat wastewater from the rest of the radiator cooling process. This study, conducted a numerical simulation to determine the thermal dispersion pattern of waste heat from PLTD cooling water in Halmahera waters. Modeling the dispersion of heat waste temperature of PLTD cooling water is carried out using the Ansys CFD (Computational Fluid Dynamics) method in 3D. The input data are in the form of heat water discharge of 4,000 tons/hour, with heat wastewater temperature 37.5 °C. Ambient seawater temperature is 30.5 °C and seawater density is 1022 kg/m3. Hydrodynamic modeling of oceanic currents is modeled with two variations, namely constant current of 0.4 m/s and UDF current. UDF currents have different current values for each depth with a current velocity of 0.005 m/s up to 0.4 m/s. The simulated results of a constant current show the spread of heat to the environment occurs as far as 210 m to the north of the discharge outlet. The highest temperature value is 37.14°C, the lowest is 30.8°C. For these UDF current models, the heat spread is 210 m to the north of the discharge outlet with the highest temperature value is 37.13°C the lowest is 30.61°C.

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