Download - Perpan - 1
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PERPINDAHAN PANAS
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Pendahuluan
• 12 Sep 2011 - 6 Jan 2012
• 15 kali pertemuan + 2 kali ujian
• Penilaian:
• Tugas-tugas mandiri: 10%
• Kuis: 20%, UTS: 20%, Diskusi: 20%
• UAS: 30%
• Nilai:
• A : 90 - 100, B : 80 - 89, C : 70 - 79
• D : 60 - 69, E : 0 - 59
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Pendahuluan•Materi Pembelajaran:
1.Konsep Dasar Perpindahan panas
2.Konduktifitas Thermal
3.Perpindahan Panas secara Konduksi
4.Konveksi dan Radiasi
5.Pendidihan dan Kondensasi
6.Peralatan Pemindah Panas
•Buku Pegangan:
• Fundamentals of Heat and Mass Transfer, Incropera
1.Surface Production Operation, Arnold&Stewart
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1. KONSEP DASAR
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Perpindahan panas di sekitar kita
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Definisi
•Heat: the quality of being hot; the state of a body perceived as having or generating a relatively high degree of warmth. *dictionary.com
•Heat: energy transferred by temperature difference. *wikipedia.org
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Termodinamika dan Perpan
Dalam termo: energi dapat dipindahkan karena interaksi sistem dengan lingkungannya. Interak-sinya dapat berupa kerja dan panas. Termo hanya mempertimbangkan keadaan akhir interaksi tsb.
Perpan: mempelajari interaksi perpindahan energi tersebut.
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Mekanisme perpan
Bila ada suatu perbedaan temperature, maka perpan akan terjadi.
Media diam (benda padat, cairan diam):
konduksi
Media bergerak/m
engalir: konveksi
Tanpa media: radiasi
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Contoh mekanisme perpan
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Contoh mekanisme perpan
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Apa yg ingin kita pelajari?
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Langkah-langkah penjelasan
•Kenyamanan tubuh: kelembaban, cahaya, temperatur.
•Temperatur terlalu tinggi, disebabkan adanya berbagai sumber panas (energi yg masuk).
•Diperlukan penurunan temperatur dengan “mengeluarkan” energi yg masuk melalui pendinginan (AC).
•Energi yg masuk ada sepanjang waktu, maka diwakilkan dengan energi/waktu (J/s = watt = hoursepower = pK
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Aplikasi di O&G
Liquified Natural Gas
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Aplikasi di O&G
Heat exchanger
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Lebih lanjut (AC dan Perpan)
4.186 J/cal