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All Journal Turbo : Jurnal Program Studi Teknik Mesin Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Cahyati, Wulan
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Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analysis Energy of Freeze Vacuum Drying System with Thermal Energy Storage and Reverse Valve of 4kg Capacity NST, Berriansyah Cipta; Cahyati, Wulan; Mainil, Rahmat Iman; Martin, Awaludin
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 3 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i3.541

Abstract

This research evaluates the energy efficiency of the Aloe vera drying process using a Freeze Vacuum Drying (FVD) system, focusing on the thermal performance and the role of a Thermal Energy Storage (TES) unit with paraffin wax as the storage medium. Experiments were conducted with Aloe vera samples of 2 kg, 3 kg, and 4 kg to assess their effects on energy usage, Coefficient of Performance (COP), and moisture removal efficiency. The highest Specific Moisture Extraction Rate (SMER) was 0.132 kg.water/kWh for the 4 kg sample, with a Specific Energy Consumption (SEC) of 7.223 kWh/kg.water and a COP of 5.4. The energy efficiency peaked at 10.80%, achieved by incorporating TES. The results demonstrate that TES improves COP and reduces the specific energy demand, leading to a more energy-efficient drying process.
Perancangan Freeze Vacuum Drying Menggunakan Thermal Energy Storage untuk Mengeringkan Lidah Buaya dengan Kapasitas 4 kg Martin, Awaludin; Cahyati, Wulan; Adriyandy, Warits; Mainil, Rahmat Iman
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4398

Abstract

Freeze vacuum drying is known as the best drying method in maintaining the nutritional quality and physical appearance of the product. However, this method has the disadvantages of a slow drying rate and high energy consumption. This study aims to improve the efficiency of the drying process by utilizing waste heat from the condenser using a thermal energy storage system using Phase Change Material (PCM) in the form of paraffin wax. This study uses a system design method that is continued to the testing stage with the results of the design of the tube diameter used, namely 0.00953 m, then the evaporator dimensions are obtained with a pipe length of 23 m, and the evaporator surface area is 7.13 x 10-5 m2. For the condenser, the pipe length is 15.9 m, and the condenser heat transfer area is 0.4762 m2. Energy consumption for drying 4 kg of aloe vera using Thermal Energy Storage (TES) is 8.937 kWh, with a design Coefficient of Performance (COP) value of 3.8 and an actual COP of 2.5.
Co-Authors Adriyandy, Warits Awaludin Martin NST, Berriansyah Cipta Rahmat Iman Mainil