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All Journal Makara Journal of Technology
Rio Ricardi, Rio
Department of Mechanical Engineering, Universitas Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Characteristics of Vacuum Freeze Drying with Utilization of Internal Cooling and Condenser Waste Heat for Sublimation Alhamid, Muhammad Idrus; Yusuf, Nasruddin; Mahlia, Indra Teuku Meurah; Kosasih, Engkos Ahmad; Yulianto, Muhamad; Ricardi, Rio
Makara Journal of Technology Vol. 17, No. 2
Publisher : UI Scholars Hub

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Abstract

Vacuum freeze drying is an excellent drying method, but it is very energy-intensive because a relatively long drying time is required. This research investigates the utilization of condenser waste heat for sublimation as a way of accelerating the drying rate. In addition, it also investigates the effect of internal cooling combined with vacuum cooling in the pressure reduction process. Jelly fish tentacles were used as the specimen, with different configurations for condenser heat waste and internal cooling valve opening. The results show that heating with condenser heat waste can accelerate the drying rate up to 0.0035 kg/m2.s. In addition, pre-freezing by internal cooling prevents evaporation until the mass of the specimen is 0.47 g and promotes transition of the specimen into the solid phase.
Co-Authors Engkos Kosasih Indra Mahlia, Indra Kosasih, Engkos Ahmad Mahlia, Indra Teuku Meurah Muhamad Yulianto Muhammad Alhamid, Muhammad Muhammad Idrus Alhamid, Muhammad Idrus Nasruddin Yusuf, Nasruddin