Counterflow Dhe
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COUNTERFLOWDOUBLE PIPE EXCANGERS
KELOMPOK 2M. FAUZI
PRI WAHYUSANREDINA
SISI OKTADIRA
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Perpindahan panas adalah salah satu faktor yang sangat menentukan operasional suatu pabrik Kimia.
Perpindahan panas akan terjadi apabila ada perbedaan temperatur antara 2 bagian benda berbeda.
Panas akan berpindah dari temperatur tinggi ke temperatur yang lebih rendah.
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Tipe Aliran pada Alat Penukar Panas
• Counter current flow (aliran berlawanan arah)
• Paralel flow/co current flow (aliran searah)• Cross flow (aliran silang)• Cross counter flow (aliran silang berlawanan)
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Counterlow – double pipe heat exchangers
aliran berlawanan arah, dimana fluida yang satu masuk pada satu ujung penukar kalor, sedangkan fluida yang satu lagi masuk pada ujung penukar panas yang lain, masing-masing fluida mengalir menurut arah yang berlawanan.
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Ukuran standard dari DHE dapat dilihat dari tabel dibawah ini.
Outer Pipe, IPS Inner pipa, IPS
2 1,75
2,5 1,75
3 2
4 3
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Kelebihan Double Pipe Heat Exchanger
• Mampu beroperasi pada tekanan yang tinggi, • karena tidak ada sambungan, • resiko tercampurnya kedua fluida sangat kecil, • mudah dibersihkan pada bagian fitting,
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Kekurangan Double Pipe Heat Exchanger
• Kapasitas perpindahan panasnya sangat kecil, • mahal, kurang dari 500 kW• terbatas untuk fluida yang membutuhkan area
perpindahan kalor kecil (<50 m2), • biasanya digunakan untuk sejumlah kecil
fluida yang akan dipanaskan atau dikondensasikan.
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Berikut ini adalah table untuk perkiraan standard dari diameter double pipe dan daerah laju yang dapat dilewatinya.
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