ABSTRACT

ANALISIS KINERJA CONDENSER SHELL AND TUBE  UNIT 2DI PT. PLN (PERSERO) SEKTOR ASAM-ASAM KALIMANTAN SELATAN

Condenser is one of heat exchanger type that has function to condense fluid. In steam system, the main function of condenser is to convert steam phasetem to liquid phase so that it can pumped back to boiler. Turbine steam flow oustside pipes, but cooling water flow inside the pipes. Cooling water then be cooled again by closed cooling system. This system contrained a sedimentation of dirt factor wich become plugged. Those dirt factor we will cause the unbalance performance of condenser.

The purpose of this study is to know value and effect the heat balance, heat transfer coefficient, pressure drop and condenser efficiency which caused by fouling factor and with collection the data, the calculated it with a Kern method then analyse it with the result data calculation.

The results of this study indicate that in 2018 the average heat balance (Q) was obtained at 356,017,533.46 Kj / hr while in 2019 the results of the average heat balance (Q) were 640,293,647,066 Kj / hr, fouling factor was not affect the heat balance because the heat balance is influenced by the temperature of the hot fluid and cold fluid entering the condenser. The average gross heat transfer coefficient (UD) in 2018 amounted to 204,274.25 Kj / hour.m2. C and the average net heat transfer coefficient (UC) was 206,378 Kj / hr.m2. ° C whereas in 2019 the average heat transfer coefficient is obtained by the average gross heat transfer coefficient (UD) of 366,544.07 Kj / jam.m2. ° C and the Clean heat transfer coefficient (UC) is 448,554 Kj / h.m2. ° C.

fouling factor is very influential on the heat transfer coefficient because the greater the fouling on the tube it will cause an increase in heat transfer resistance which results in the inhibition of the heat transfer rate in the tube so that the heat transfer coefficient decreases. The pressure drop in 2018 is still within the permissible limits, with an average of 504.28 bars and 2019 of 513.03 bars. The effectiveness of condenser efficiency in 2018 averaged 23.330 after maintenance obtained the results of the average level of effectiveness of the condenser efficiency in 2019 amounted to 40.743

Keywords: Surface condensers, effectiveness, comparison