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All Journal MUSTEK ANIM HA Jurnal Industri dan Teknologi Samawa (JITSA) Serambi Engineering
Achmad, Andi Muhammad Fiqri
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Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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SISTEM PEMANAS AIR PEMANFAATAN TENAGA MATAHARI MENGGUNAKAN METODE CFD Azis, Ismayati Sutina; Larosa, Esta; Achmad, Andi Muhammad Fiqri; Yudha, Sabdha Purna; Latief, Rifaldy Ramadhan
MUSTEK ANIM HA Vol 13 No 01 (2024): MUSTEK ANIM HA
Publisher : Faculty of Engineering, Musamus University, Merauke, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35724/mustek.v13i01.5929

Abstract

Energi matahari banyak dimanfaatkan sebagai energi terbarukan yang berlimpah dan berasal dari sumber daya alam dari proses yang berkelanjutan. Sistem pemanas air pemanfaatan tenaga matahari yang menggunakan metode CFD ini adalah system yang memanfaatkan sumber energi berasal dari tenaga matahari. Menggunakan pelat absorber sebagai penyerap panas. Penelitian dengan metode CFD yang dilakukan ini sebagai tindak lanjut unjuk kerja Sistem pemanas air pemanfaatan tenaga matahari dengan tambahan penggunaan material yaitu PCM (Phase Change Material). Contoh pemodelan dari absorber kolektor pemanas pemanas air pemanfaatan tenaga matahari dilakukan dengan memvariasikan absorber plat yang digunakan sebagai media penyimpanan PCM maupun dengan tanpa penyimpanan PCM. Pelat absorber sebagai penyerap energi matahari untuk penyimpanan energi pada PCM dimodelkan dengan pemberian tiga model ketebalan variasi dengan masing masing ketebalan PCM adalah 0,015 m, 0,01 m, dan 0,006 m. Data pengujian yang dilakukan secara eksperimental yang diambil pada penelitian sebagai nilai rujukan awal untuk penelitian ini, sedangkan untuk pemodelan dilakukan dengan metode software CFD (Computational Fluid Dynamics) FLUENT. Dari hasil penelitian dengan metode CFD terlihat efisiensi dari absorber pelat kolektor tertinggi yang terlihat pada penelitian ini adalah pada kolektor yang menggunakan PCM dengan variasi tebal PCM yaitu 0,015 m. Efisiensi yang didapatkan dirata-rata 67,49 %.
Identifikasi Waste Pada Proses Produksi Untuk Meminimumkan Penggunaan Ruangan Menggunakan Pendekatan Lean Manufacturing Nurwahidah, Andi; Achmad, Andi Muhammad Fiqri; Madi, Reskika Putri
Jurnal Industri dan Teknologi Samawa Vol 6 No 2 (2025): EDISI 12
Publisher : Program Studi Teknik Industri Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/jitsa.v6i2.5131

Abstract

Kedai Kue ABC is a Small and Medium Enterprise (SME) that produces snacks such as cookies, bread, and sponge cakes. Its main product is white bread, which is supplied to five coffee shop outlets. Currently, the demand for white bread reaches 180 loaves per day from three outlets, but the SME can only fulfill 120 loaves, equivalent to supplying two outlets. This study aims to identify waste in the white bread production process and its root causes by applying lean manufacturing principles using the Value Stream Mapping (VSM) and Process Activity Mapping (PAM) methods. The process begins with mapping the current state, followed by analyzing the causes of waste using a fishbone diagram. Subsequently, a more efficient future state map is developed. The results identify two main types of waste: motion waste and transportation waste. The proposed improvements can reduce production time by up to 1,112 seconds (18.95 minutes). Recommendations include eliminating non-value-added activities, combining processes, increasing machine capacity, adding tool racks, rearranging the production layout, and applying the 5S principle to enhance production efficiency at Kedai Kue ABC
Penentuan Rute dan Pengelolaan Persediaan dengan Mempertimbangkan Jumlah Permintaan Stokastik dan Jendela Waktu Achmad, Andi Muhammad Fiqri; Irfan Rusydi Triyanto
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

One problem with stochastic characteristics is the drug distribution process. Drug demand originates from pharmacies, with the quantity requested varying each time a request is sent. This can be caused by several factors, one of which is that people's illnesses also vary and are not always the same. Due to this fluctuating demand from pharmacies, drug distributors must also provide larger quantities of drugs in their warehouses as safety stock. This study aims to develop a mathematical model for determining distribution vehicle routes and inventory management by considering uncertain demand and the presence of time windows. The developed mathematical model is in the form of a MILP. The data used is entirely synthetic and randomly generated. Data processing is carried out with several scenarios, by measuring the objective function value and computation time. The data processing results have produced a global optimal solution for 15 retailers and 5 different Beta value scenarios. The objective function value and computation time will increase with the increase in the number of retailers/pharmacies.
Co-Authors Azis, Ismayati Sutina Irfan Rusydi Triyanto Larosa, Esta Latief, Rifaldy Ramadhan Madi, Reskika Putri Nurwahidah, Andi Yudha, Sabdha Purna