Doctoral Dissertations
Doctoral Dissertations
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Sistem Pengering Energi Surya dengan Konveksi Paksa untuk Mendapatkan Kecepatan Pengeringan dan Suhu Pengeringan yang Diharapkan untuk Mendapatkan Kualitas Pengeringan Biji Kopi yang Bermutu
(Universitas Sumatera Utara, 2025)Drying airflow velocity has a very large role in the drying rate of agricultural commodities such as coffee. High airflow velocity is proven to increase the drying rate of coffee as seen in the decrease of water content ... -
Penggunaan Minyak Pirolisis Plastik sebagai Aditif untuk Memperbaiki Sifat Fisika-Kimia Biodiesel Biji Karet; Produksi, Analisis Sifat Fisika-Kimia dan Uji Performa pada Mesin Diesel
(Universitas Sumatera Utara, 2025)The aim of this research is to determine the use of Pyrolysis Plastic Oil (PPO) as an additive to improve the physico-chemical properties and performance of Rubber Seed Biodiesel (RSB). In this research, BBK was produced ... -
Pengaruh Isolasi Permukaan Kaca Evaporator dan Kolektor Aliran Alami Terhadap Laju Kondensasi pada Solar Distilasi
(Universitas Sumatera Utara, 2025)Desalination is a commonly used method to obtain clean freshwater. Solar-based desalination technology offers advantages in terms of ease of use and availability of energi sources, but its efficiency is still limited by ... -
Kajian Sistem Pendingin Ruangan dengan Atap Kolektor Matahari (Study of Room Cooling Systems with the Solar Collector Roof)
(Universitas Sumatera Utara, 2024)The cooling tank is a heat exchange device whose working fluid is water, and air functions to cool the water through direct contact with the air, causing a small portion of the water to evaporate. This water will flow ... -
Friction Stir Welding (FSW) Material Komposit HDPE /Serat Pendek Fiberglass untuk Pipa Air Laut Dingin pada Ocean Thermal Energy Conversion (OTEC) System
(Universitas Sumatera Utara, 2024)Cool Water Pipe (CWP) is very necessary in ocean-based Ocean Thermal Energy Conversion (OTEC) to channel cold water with a temperature of 5 °C from a depth of > 500 m to the condenser to liquefy the ammonia so that the ... -
Sistem Pengering Energi Surya dengan Konveksi Paksa untuk Mendapatkan Kecepatan Pengeringan dan Suhu Pengeringan yang Diharapkan untuk Mendapatkan Kualitas Pengeringan Biji Kopi yang Bermutu
(Universitas Sumatera Utara, 2024)Drying method is an important process in determining the quality of coffee beans. Traditional drying methods have constraints such as the low efficiency of solar intensity, the presence of dust and dirt contamination, thus ... -
Kajian Performansi Mesin dan Laju Korosi Biodiesel dari Campuran Minyak Goreng Bekas (WCO), Minyak Kesambi dan Minyak Solar
(Universitas Sumatera Utara, 2023)Biodiesel from Used Cooking Oil has disadvantages, such as low oxidation stability during storage and poor cold flow properties. These poor physicochemical properties can be corrected in various ways, such as mixing with ... -
Karakteristik Bahan Komposit High Density Polyethylene yang Diperkuat Serat Pendek Fiberglass untuk Pipa Air Dingin Ocean Thermal Energy Conversion (OTEC)
(Universitas Sumatera Utara, 2023)Ocean thermal energy conversion (OTEC) is a new energy source for the future that is clean and environmentally friendly with zero emissions. It is very potential to be developed in Indonesia which is located on the equator, ... -
Kinerja Sistem Solar Still dengan Menggunakan Cangkang Kelapa Sawit
(Universitas Sumatera Utara, 2023)The shortage of fresh water is increasing with the rapid growth of human population, industry and environmental pollution. This water scarcity can be overcome by using a solar still to convert sea water into fresh water. ... -
Pengaruh Cu-Sn Heat Exchanger Shell and Tube terhadap Tekanan Uap pada Pembangkit Listrik Tenaga Konversi Energi Panas Laut (OTEC)
(Universitas Sumatera Utara, 2023)The OTEC case study with a plate heat exchanger measuring 50 mm wide x 1500 mm long titanium material previously managed to show its excellent corrosion resistance performance with an overall heat transfer coefficient ... -
Analisis Medan Aliran Gravitasi Turbin Air Vortex Satu Tingkat Dengan Impeller pada Wadah Silinder
(Universitas Sumatera Utara, 2023)One of the challenges contained in the General National Energy Plan is to increase the national renewable energy mix to 23% in 2025 and to 31% in 2050. This is one of the driving forces for researchers to be able to ... -
Potentiality of Abaca Fiber As Engineering Structural Materials
(Universitas Sumatera Utara, 2019)Related to the importance of selectivity to natural fibers that can be used and qualify as one of the raw material composite engineering substitute for Fiber Reinforced Plastics (FRP) or Fiber Reinforced Metals (FRM), one ... -
Mesin Pendingin Siklus Adsorpsi Tenaga Surya dengan Menggunakan Adsorben Alternatif dan Adsorbat Metanol
(Universitas Sumatera Utara, 2017)Indonesia memiliki potensi berlimpah energi surya karena lokasinya berada di garis khatulistiwa 6°N dan 11°N serta di antara 95°E dan 141°E. Sebagian besar wilayah Indonesia mendapat radiasi cukup besar dengan rata-rata ...
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