RE-DESAIN OIL COOLER PEMBANGKIT LISTRIK TENAGA AIR SUTAMI

Cooling System is a system that involves the cooling of an equipment. The cooling system is intended to reduce overheating of an equipment so that the equipment does not wear out quickly so that it can cause damage. The lubricating oil cooling system in this hydroelectric power plant uses water as a cooling medium or commonly called the Cooling Water System by tapping water from a penstock that uses a potential head. Water is used as a cooling medium because water cools oil faster than air, that is because water has a greater heat type than air. But the drawback when using water is that if there is a leak due to corrosion and mud sediment clogged in the cooling pipe (tube) then the water will be mixed with oil so that there will be interference with equipment that is leaking .. The research method used in this study is Pahl and Beitz research methods. Pahl and Beitz proposed how to design products as described in his book; Engineering Desaign: A Systematic Approach. The results obtained are the known Tempertarure is the inlet water temperature of 23 ° C, the calculation results obtained for the temperature of the outgoing water is 93 ° C, the result of the heat transfer area (heat exchanger) of 55 KW, the heat exchanger cross-sectional area (heat exchanger) amounted to 14.29 m2, the number of tube bundles obtained as many as 135 pieces with a length of 2m. The outer diameter is 12.7 mm, and the inner diameter is 10.9 mm. Materials using Aluminum Alloy