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All Journal Jurnal AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin
Widiawati, Candra Damis
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Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Perubahan Material CuNi dengan Stainless Steel SA 213 TP304 terhadap Performansi Air Cooler Generator di PLTA Saguling Gaos, Yogi Sirodz; Widiawati, Candra Damis
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2015)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.619 KB) | DOI: 10.32832/ame.v1i1.101

Abstract

Alat penukar kalor merupakan peralatan yang mampu menukar kalor dari fluida panas ke fluida dingin. Parameter yang paling kritis dalam desain alat penukar kalor adalah overall thermal conductivity. Jika overall thermal conductivity lebih besar, maka unjuk kerja alat penukar kalor menjadi lebih baik, dimana kondisi tersebut dipengaruhi oleh konduktivitas termal pipa dan material sirip. Material yang paling banyak digunakan alat penukar kalor adalah copper, karena konduktivitas termalnya paling besar sekitar 385 W/moC. Akan tetapi untuk kondisi lainnya, copper nickel (CuNi) pipa, Titanium pipa dan pipa stailess steel AISI 304 yang biasanya digunakan untuk fluida bersifatkorosif. Analisis konduktivitas termal pipa menggunakan tiga metode dan perbedaan masukan data, yaitu 1)perhitungan sederhana; pendingin generator dengan udara di PLTA Saguling, 2) Perhitungan Shell and Tube; pendingin minyak pelumas mesin SWD 6TM410RR, 3) Perhitungan Guentner;pendingin air SWD 6TM410RR. Analisis perhitungan sederhana, shel and tube dan Guentner secara berturut-turut menghasilkan: kapasitas kalor fluida panas masing-masing, Qhot= 433 kW, 305 kW and 510 kW; kapasitas pendinginan udara pendingin pada pipa CuNi, Qhe= 433 kW, 460 kW and 603.62kW; kapasitas pendinginan udara pendingin menggunakan pipa AISI 304, Q’he = 432 kW, 454 kW and 594.35 kW; dan kapasitas pendinginan turun sebesar 0,24%, 1,30% and 1,54%. Berdasarkan perhitungan shell and tube dengan Guentner, kapasitas pendinginan udara menggunakan pipa stailesssteel AISI 304 harus dibalik menjadi 20% untuk mengantisipasi konduktivitas termal yg rendah dari pipa stailess steel AISI 304. Sehingga direkomendasikan untuk menambah luas permukaan sentuh kisaran 20%, sehingga kapasitas pendinginan udara yg menggunakan pipa stailess steel AISI 304menjadi 518 kW.
ANALISA COOLING SISTEM GE FRAME 9 PLTG SICANANG 120MW Gaos, Yogi Sirodz; Widiawati, Candra Damis
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 2 No. 2 (2016)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (760.128 KB) | DOI: 10.32832/ame.v2i2.355

Abstract

Power plant is an industrial facility for the generation of electric power. Mechanical power is produced by a heat engine that transforms thermal energy, often from combustion of a fuel, into rotational energy for generator, than produces electric power. On all the power plant is operated in high temperature and high pressure, so it needed cooling system to prevent from over heating, if not the power plant system will be damaged. PLTG Sicanang produced 120MW electric power; the cooling systems consist of generator cooler and turbin cooler. Design input data was temperature inlet and outlet water, volumerate water, and ambient temperature. Design performance of generator cooler 1) capacity 2450 kW 2) water inlet 46.5oC and water outlet 40oC 3) water volume flow 330 m3/h 4) air volume flow 312m3/s. Design performance of turbin cooler 1) capacity 1570 kW 2) water inlet 56.3oC dan water outlet 46.5oC 3) water volume flow 140 m3/h 4) air volume flow 312m3/s. The actual performance for 50 MW load 1) generator cooler; water inlet 43oC, water outlet 40oC, water volumerate 330 m3/h, air volumerate 182m3/s 2)turbin cooler water inlet 47oC, water volumerate 140 m3/h, air volumerate 182m3/s. 100 MW load 1) generator cooler; water inlet 45oC, water outlet 40oC, water volumerate 330 m3/h, air volumerate 208m3/s 2)turbin cooler water inlet49oC, water volumerate 140 m3/h, air volumerate 208m3/s. The generator cooler has been designed with reverse surface 25% which was capable to cooling heat 3066 kW, where as the turbin generator has been designed with reverse surface 17% which was capable to cooling heat 1850 kW. The reverse surface was designed to anticipate hinger ambient temperature and over load.
Co-Authors Yogi Sirodz Gaos, Yogi Sirodz