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All Journal Majalah Ilmiah MOMENTUM Journal of Renewable Energy and Smart Device
Wawan Mariki, I Wayan
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Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering

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Design And Control Modelling of An IoT-Enabled Solar-Powered Ac Lighting System with Embedded Power Conversion Amar, Ishak; Wawan Mariki, I Wayan; Fahri Anwar; Achmad Romadin
Journal of Renewable Energy and Smart Device Vol. 3 No. 2 April 2026
Publisher : PT. Global Research Collaboration

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.66314/joresd.v3i2.534

Abstract

This study investigates the performance of a photovoltaic-based power conversion and wireless monitoring system designed for small-scale renewable energy applications. The proposed system integrates a DC–AC inverter, closed-loop voltage regulation, and wireless communication using an embedded controller to enable stable power delivery and real-time monitoring. Experimental testing was conducted under varying irradiance and load conditions to evaluate electrical performance, conversion efficiency, dynamic response, and communication behavior. The results show that output power increased proportionally with irradiance, reaching a maximum of 53.27 W at 1000 W/m². The inverter demonstrated stable conversion efficiency in the range of 86.40%–89.11%, with an average efficiency of 87.94%, indicating effective power conversion across different operating conditions. Dynamic response analysis revealed an overdamped behavior with no observable overshoot and voltage ripple below 5%, confirming stable voltage regulation and agreement with the proposed second-order transfer function model. In addition, the wireless monitoring subsystem operated reliably, with Wi-Fi providing lower response time than Bluetooth for real-time control and monitoring purposes. Overall, the experimental results confirm that the proposed system is capable of achieving stable electrical performance, efficient energy conversion, and reliable wireless communication, making it suitable for standalone solar lighting and other small-scale distributed renewable energy applications.
ANALISIS PERFORMA SISTEM AIR CONDITIONING PADA KABIN EXCAVATOR PC 200-8M0 KOMATSU: Rekomendasi Perawatan Komponen AC Pada Unit Excavator tanaka, imam ridwan; Yuliansyah, Fisal; Wawan Mariki, I Wayan; Puspa Ningrum, Ainun Chandra; Nugroho, Agung
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.14847

Abstract

Sistem air conditioning (AC) pada kabin excavator berperan penting dalam menjaga kenyamanan dan fokus operator selama bekerja, terutama saat unit beroperasi pada suhu lingkungan yang tinggi. Penelitian ini bertujuan untuk menganalisis performa sistem AC pada kabin Excavator Komatsu PC 200-8M0 di PT Tata Buana Karya. Metode yang digunakan adalah deskriptif kuantitatif dengan mengamati pengaruh tiga variasi tekanan refrigeran, yaitu 20/150 psi, 25/175 psi, dan 30/200 psi terhadap suhu kabin dan efisiensi pendinginan. Data diambil selama 30 menit dengan pencatatan setiap 2 menit. Hasil penelitian menunjukkan bahwa tekanan refrigeran berpengaruh langsung terhadap performa pendinginan. Tekanan 30/200 psi menghasilkan penurunan suhu tertinggi hingga 18,4°C dengan efisiensi sebesar 62,8%, sementara tekanan 25/175 psi dan 20/150 psi masing-masing menghasilkan efisiensi sebesar 52,2% dan 45,2%. Namun, kenyamanan optimal justru diperoleh pada tekanan 20/150 psi karena mampu menjaga suhu kabin tetap stabil pada kisaran 16°C. Dengan demikian, dapat disimpulkan bahwa kondisi paling optimal secara teknis tidak selalu sama dengan kondisi paling sesuai untuk kenyamanan operator, sehingga pengaturan tekanan refrigeran perlu mempertimbangkan keseimbangan antara performa pendinginan maksimum dan kestabilan suhu kabin.
Co-Authors Achmad Romadin Amar, Ishak Fahri, Anwar Fisal Yuliansyah Nugroho, Agung Puspa Ningrum, Ainun Chandra Tanaka, Imam Ridwan