{"id":2133,"date":"2021-04-13T13:12:17","date_gmt":"2021-04-13T13:12:17","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2133"},"modified":"2021-04-13T13:14:08","modified_gmt":"2021-04-13T13:14:08","slug":"when-stainless-steel-bellows-used-in-shell-heat-exchanger","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/id\/when-stainless-steel-bellows-used-in-shell-heat-exchanger\/","title":{"rendered":"Ketika bellow baja tahan karat digunakan dalam penukar panas shell"},"content":{"rendered":"<p>Heat exchanger selang belanga adalah upgrade yang didasarkan pada heat exchanger selongsong lurus (berkilau). Desain puncak dan lembah gelombang mewarisi keunggulan heat exchanger tubular seperti daya tahan dan keamanan, dan pada saat yang sama mengatasi kekurangan seperti kapasitas transfer panas yang buruk dan mudah tergores. Prinsipnya adalah meningkatkan koefisien transfer panas secara keseluruhan agar dapat mengurangi area transfer panas yang dibutuhkan, yang dapat menghemat bahan dan mengurangi berat badan dengan efektivitas transfer panas yang sama.<\/p>\n<p>Karena tubuh selang beralur diproses melalui teknik press dingin\u00a0<a href=\"https:\/\/wldstainless.com\/products\/stainless-steel-u-bend-tube\/\">pipa yang terang<\/a> Sebagai generalisasi, umumnya diyakini bahwa tubuh selang dapat diperkuat setelah dibentuk. Hasil percobaan stabilitas tekanan eksternal menunjukkan bahwa ketidakstabilan tabung pertukaran panas bergelombang terjadi pertama-tama di bagian pipa lurus, dan tabung bergelombang hanya akan tidak stabil jika tekanan eksternal terus meningkat. Hal ini menunjukkan bahwa stabilitas bagian bergelombang lebih baik daripada bagian lurus dan bahwa tekanan kritis bagian bergelombang lebih tinggi daripada bagian lurus.<\/p>\n<p>Percobaan menunjukkan bahwa gelombang deformasi yang terjadi di dalam rongga gelombang, terutama gelombang tunggal lokal, umumnya tidak lebih dari dua gelombang yang mengalami instabilitas pada saat bersamaan; hal ini menunjukkan bahwa stabilitas puncak gelombang lebih baik daripada rongga gelombang, namun terkadang juga dapat terjadi sebaliknya; dalam proses pemerasan dingin, baik rongga maupun ketebalan dinding bagian lurus tetap konstan; setelah dipanaskan, sebenarnya tabung tersebut menjadi lebih pendek.<\/p>\n<p>Keberadaan puncak dan lembah gelombang dalam baling-baling meningkatkan efek konveksi pertukaran panas radial dalam tabung, seperti yang ditunjukkan pada gambar di bawah:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2134\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger.png\" alt=\"\" width=\"840\" height=\"112\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger.png 840w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-300x40.png 300w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-768x102.png 768w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-705x94.png 705w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-450x60.png 450w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><\/p>\n<p>Konveksi radial memiliki pengaruh besar pada koefisien transfer panas total, yang merupakan alasan utama mengapa heat exchanger berbentuk pelat tabung ganda harganya murah dan ringan. Luas area pertukaran panas heat exchanger ini lebih besar daripada heat exchanger berbentuk pelat tabung tunggal. <a href=\"https:\/\/wldstainless.com\/products\/stainless-steel-u-bend-tube\/\">tube<\/a> permukaan tubuh selang belulang dan tabung lurusnya besar pada panjang yang sama, namun perubahan ini jauh lebih kecil daripada kontribusi dari perubahan nilai koefisien. Dapat dilihat dengan jelas bahwa kecepatan aliran tabung lurus (ringan) berkurang secara signifikan ketika berada dekat dengan dinding tabung.<\/p>\n<p>Peredam panas kerang dengan beling dapat membuat kecepatan dan arah fluida berubah secara konstan untuk membentuk turbulensi dibandingkan dengan peredam panas tabung lurus, sehingga pertukaran panas dengan dinding tidak akan lagi terjadi. Koefisien transfer panas total dapat ditingkatkan hingga 2 ~ 3 kali, dan operasinya bahkan dapat mencapai 5 kali lipat, dan bobotnya ringan, itulah sebabnya harga peredam panas kerang lebih rendah daripada peredam panas tabung lurus. Menurut perhitungan dan pengalaman praktis, koefisien transfer panas total dari peredam panas kerang dengan ketebalan 1 mm lebih% rendah dari pada peredam panas kerang dengan ketebalan 0,5 mm. Data operasi ratusan peredam panas kerang menunjukkan bahwa ketebalan dinding (hampir semua 0,5 mm) merupakan alasan utama untuk beroperasi selama 10 ~ 14 tahun tanpa perbaikan atau kerusakan besar.<\/p>\n<p>Selain itu, penukar panas beling dapat secara efektif menahan dampak air hammer. Cangkang penukar panas pelat tabung ganda terhubung dengan sambungan pelengkung. Jika mengalami dampak air hammer, sambungan pelengkung akan terlepas. Hal ini terjadi pada kedua jenis penukar panas beling dan penukar panas tabung lurus, dan deformasi cangkang dapat menyebabkan tabung berputar. Hal ini disebabkan oleh beling memiliki margin ekspansi yang lebih besar, margin elastis strain yang besar saat mengalami deformasi, yaitu kemampuan untuk menahan instabilitas yang kuat dalam kasus ini. Namun dalam setiap kasus, dalam proses pemasangan untuk menghindari terjadinya air hammer, dapat dilakukan dengan menggunakan katup sudut, saklar penundaan, dan langkah-langkah lainnya.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2135\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint.png\" alt=\"\" width=\"439\" height=\"200\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint.png 439w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint-300x137.png 300w\" sizes=\"auto, (max-width: 439px) 100vw, 439px\" \/><\/p>\n<h3>Keunggulan dari penukar panas dengan shell bellow terbuat dari stainless steel<\/h3>\n<ul>\n<li>Efisiensi transfer panas yang tinggi<\/li>\n<\/ul>\n<p>Desain puncak dan lekukan khusus pada bellows membuat aliran fluida terjadi karena mutasi terus-menerus pada bagian dalam dan luar tabung sehingga terbentuk turbulensi yang kuat. Bahkan dalam kasus aliran yang sangat kecil, fluida dapat membentuk gangguan yang kuat di dalam dan di luar tabung, yang sangat meningkatkan koefisien transfer panas dari tabung pertukaran panas. Koefisien transfer panasnya adalah 2~3 kali lebih tinggi dibandingkan dengan tabung pertukaran panas tradisional.<\/p>\n<ul>\n<li>Tidak ada scaling dan blocking<\/li>\n<\/ul>\n<p>Medium di dalam dan di luar belerang selalu berada dalam kondisi sangat bergejolak, yang membuat partikel padat dalam medium sulit terakumulasi menjadi skala; Sebaliknya, dipengaruhi oleh perbedaan suhu medium, akan menghasilkan deformasi ekspansi aksial, kelengkungannya akan berubah secara sering, tabung pertukaran kotoran dan panas akan menghasilkan gaya tarik yang besar, bahkan jika skala tidak bergerak akan terlepas secara otomatis, sehingga penukar panas selalu mempertahankan kinerja perpindahan panas yang tahan lama dan lebih baik.<\/p>\n<ul>\n<li>Kompensasi otomatis<\/li>\n<\/ul>\n<p>Struktur dan bentuk khusus dari bellows dapat secara efektif mengurangi stres termal dalam kondisi dipanaskan tanpa menggunakan sambungan pelengkungan, sehingga mempermudah struktur produk dan meningkatkan keandalan produk.<\/p>\n<ul>\n<li>Umur pemakaian yang lama<\/li>\n<\/ul>\n<p>Kemampuan ekspansi aksial meningkat, yang secara efektif mengurangi tegangan perbedaan suhu dan dapat menyesuaikan diri dengan perubahan perbedaan suhu dan tekanan yang besar, sehingga tidak akan terjadi kebocoran akibat pecahnya lubang pipa. Sambungan antara pelat penyaring dan beling memperpanjang masa pakai penukar panas.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>The bellows tube heat exchanger is an upgrade based on a straight (bright) tube heat exchanger. The design of the crest and trough of the wave inherits the advantages of the tubular heat exchanger such as durability and safety, and at the same time overcomes the defects such as poor heat transfer capacity and easy [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2133","post","type-post","status-publish","format-standard","hentry","category-social-activities"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The shell heat exchanger with bellows can make the fluid speed and direction of constant change to form turbulence compared with a straight tube exchanger.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" 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