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All Journal Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Distilat: Jurnal Teknologi Separasi Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Teknik Kimia dan Lingkungan
Mufid Mufid
Jurusan Teknik Kimia, Politeknik Negeri Malang
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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Journal : Jurnal Teknik Kimia dan Lingkungan

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Pengaruh Pitch Turbulator Terhadap NTU Pada Double Pipe Heat Exchanger Mufid Mufid; Arif Rahman Hakim; Bambang Widiono
Jurnal Teknik Kimia dan Lingkungan Vol. 3 No. 1 (2019): April 2019
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1156.273 KB) | DOI: 10.33795/jtkl.v3i1.101

Abstract

Saat ini kebutuhan akan energi di dunia terus meningkat, sejalan dengan semakin tumbuhnya industri untuk menopang kehidupan manusia. Namun kenaikan kebutuhan energi tersebut tidak diimbangi dengan bertambahnya sumber energi, sehingga harga energi semakin mahal. Untuk meminimalisir kebutuhan energi, maka perlu dicari sumber-sumber energi alternatif baru, terutama sumber energi baru dan terbarukan. Disamping itu perlu dilakukan pengelolaan energi yang lebih baik, sehingga kebutuhan energi dunia bisa dikurangi. Double Pipe Heat exchanger memiliki pipa luar stainless steel dengan diameter dalam (Do) 3,5 inchi, ketebalan pipa (To) 1,5 mm, dan panjang pipa (Lo) 790mm dan pipa dalam (Di) 1 3/8 inchi, ketebalan(Ti) 0,6 mm, dan panjang pipa (Li) 920mm, dengan air dingin dan air panas yang digunakan sebagai fluida uji di annulus dan pipa dalam. Helical turbulator dari besi (mild steel) dengan dimensi geometris jarak antar elemen (pitch) sebesar 25mm, 50 mm dan 75 mm berdiameter dalam (Di) 5/16 inchi dan diameter luar(Do) 1 5/16 inchi dengan panjang 750mm dimasukkan dalam inner tube dari heat exchanger. Air panas memasuki tabung dengan variasi flowate mulai 400 l/jam sampai 900 l/jam, sedangkan flowrate air dingin konstan 900 l/jam. Hasil penelitian dengan disisipkannya helical turbulator sebagai turbulator pada heat exchanger mengakibatkan peningkatan laju perpindahan kalor. Helical turbulator dengan pitch 25mm menimbulkan peningkatan laju perpindahan kalor paling besar sebesar 62% dibandingkan plain tube. Helical turbulator mengakibatkan peningkatan NTU heat exchanger terbesar sebesar 63% dihasilkan oleh helical turbulator dengan pitch 25mm. At present the need for energy in the world continues to increase, in line with the growing industry to sustain human life. However, the increase in energy needs is not offset by the increase in energy sources, so energy prices are increasingly expensive. To minimize energy needs, it is necessary to look for new alternative energy sources, especially new and renewable energy sources. Besides that, better energy management is needed, so that the world's energy needs can be reduced. Double Pipe Heat Exchanger has stainless steel outer pipe with inner diameter (Do) 3.5 inch, pipe thickness (To) 1.5 mm, and pipe length (Lo) 790 mm and pipe inside (Di) 1 3/8 inch, thickness (Ti) 0.6 mm, and the length of pipe (Li) 920 mm, with cold water and hot water used as test fluid in the annulus and inner pipe. Mild steel helical turbulators with geometric dimensions of 25mm, 50mm and 75mm intervals between 5/16 inch in diameter and a 750mm length 5/16 inch outer diameter (Do) are included in the inner tube of heat exchanger. Hot water enters the tube with variations in flowate from 400 l / hour to 900 l / hour, while the cold water flowrate is constant 900 l / hour. The results of the study by inserting a helical turbulator as a turbulator in a heat exchanger resulted in an increase in the heat transfer rate. Helical turbulators with a pitch of 25mm give rise to the highest heat transfer rate of ±62% compared to plain tubes. Helical turbulators cause the largest increase in NTU heat exchanger of ±63% produced by a helical turbulator with a 25mm pitch.
Co-Authors Afdal Suhadno Agung Ari Wibowo Alex Zainul Fanani An Nisaa’ Fithriasari Andika Soharmat Aprijaya Arif Rahman Hakim Asalil Mustain Asalil Mustain Asalil Mustain Asalil Mustain Aulia Sari Az Zahra Bambang Widiono Desi Nurisnaeni Saputri Dhoni Hartanto Frida Arlista Hadi Priya Sudarminto Hardjono Hardjono Hardjono Hardjono Heny Dewajani Ilham Arfiansyah Mia Narulita Muh Subur Muh Subur Nofiatul Azizah Pravianti Anindita Nastiti Prayitno Prayitno Putri Dita Sari Rahmadhona Giowinda Islami Rizqy Romadhona Ginting Rulianah, Sri Shabrina Adani Putri Sindhuwati, Christyfani Siti Iffah Munawaroh Suryandari, Ade Sonya Vemmy Nurmala Andhani Putri Yasinta Octaliya Rosly Zainur Risky Ardiansyah Zakijah irfin