RANCANGAN HEAT EXCHANGER JENIS SHELL AND TUBE UNTUK PRODUKSI NANOPARTIKEL Fe3O4 SKALA INDUSTRI: DESIGN OF SHELL AND TUBE TYPE HEAT EXCHANGER FOR INDUSTRIAL SCALE Fe3O4 NANOPARTICLE PRODUCTION USING MATHEMATIC MODELING. Fraction [Internet]. 2022 Dec. 2 [cited 2025 Nov. 1];2(2):46-52. Available from: https://fraction.ubb.ac.id/index.php/fraction/article/view/33