ANALISIS EFEKTIFITAS (Ɛ) KENAIKAN TEMPERATURE WATER OUTLET TERHADAP KINERJA CLOSED COOLING WATER HEAT EXCHANGER PADA GAS TURBINE MUARA KARANG DENGAN METODE PERHITUNGAN LOGARITHMIC TEMPERATURE DIFFERENCE (LTD)

NUGROHO, FERRY (2020) ANALISIS EFEKTIFITAS (Ɛ) KENAIKAN TEMPERATURE WATER OUTLET TERHADAP KINERJA CLOSED COOLING WATER HEAT EXCHANGER PADA GAS TURBINE MUARA KARANG DENGAN METODE PERHITUNGAN LOGARITHMIC TEMPERATURE DIFFERENCE (LTD). S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

The PLTGU cycle consists of three main parts, namely GTG, HRSG, STG. Cooling system is one of the important components in the PLTGU cycle. The occurrence of Temperature Water Outlet of CCW Heat Exchanger in Gas Turbine which is based on General Technical Data that the maximum Temperature CCW Outlet is 35oC, where the average Temperature Outlet CCW Heat Exchanger Gas Turbine in the year 2019 reaches 32,51oC. Given the importance of influence on the effectiveness of CCW Heat Exchanger Gas Turbine, which affects the operation at maximum load PLTGU so that the authors perform effectiveness analysis (Ɛ) increase in Temperature Water Outlet performance of Closed Cooling Water Heat Exchanger in Gas Turbine Estuary coral with Logarithmic Temperature Difference calculation method (LTD). Starting with measurements of Ambient temperature, Temperature Inlet and CCW outlets. The result of the measurements is used to calculate the value of Logarithmic Temperature Difference (LTD), Heat Transfer, effectiveness of PLTGU cooling system. The calculation result of year 2019 compared with Commissioning data effectiveness decreased from 76.44% to 60.02%, the value of LTD is experiencing a hike from 0,83oC to 1,52oC and Heat Transfer increased from 1869.41 kcal/h to 3461.06 kcal/h. Where the increase in value of LTD. Affects the increase in Heat Transfer and increase in value of LTD. Keywords ; PLTGU, CCW Heat Exchanger in Gas Turbine, Effectiveness, Logarithmic Temperature Difference (LTD) Pada siklus PLTGU secara garis besar terdiri dari tiga bagian utama yaitu sistem GTG, HRSG, STG. Sistem pendingin merupakan salah satu komponen penting dalam siklus PLTGU. Terjadinya kenaikan Temperature Water Outlet CCW Heat Exchanger pada Gas Turbine dimana berdasarkan General Technical Data bahwa maximum Temperature CCW Outlet adalah 35oC, Dimana rata-rata Temperature Outlet CCW Heat Exchanger Gas Turbine pada tahun 2019 mencapai 32,51oC. Mengingat pentingnya pengaruh efektifitas terhadap kinerja CCW Heat Exchanger Gas Turbine yang berpengaruh terhadap pengoperasian pada beban maximum PLTGU sehingga penulis melakukan Analisis Efektifitas (Ɛ) Kenaikan Temperature Water Outlet Terhadap Kinerja Closed Cooling Water Heat Exchanger Pada Gas Turbine Muara Karang Dengan Metode Perhitungan Logarithmic Temperature Difference (LTD). Dimulai dengan pengukuran terhadap temperatur Ambient, Temperature Inlet dan outlet CCW. Hasil dari pengukuran digunakan untuk menghitung nilai Logarithmic Temperature Difference (LTD), Heat Transfer, Efektifitas sistem pendingin PLTGU. Hasil perhitungan tahun 2019 dibandingkan dengan data Commissioning efektifitas mengalami penurunan dari 76,44% menjadi 60,02%, nilai LTD mengalami kenaikan dari 0,83oC menjadi 1,52oC dan Heat Transfer mengalami kenaikan dari 1869,41 kcal/h menjadi 3461,06 kcal/h. Dimana kenaikan nilai LTD mempengaruhi kenaikan Heat Transfer dan kenaikan nilai LTD mempengaruhi penurunan efektifitas yang terjadi di CCW Heat Exchanger pada Gas Turbine. Kata Kunci; PLTGU, CCW Heat Exchanger pada Gas Turbine, Efektifitas, Logarithmic Temperature Difference (LTD)

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