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prayudi prayudi
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Chiller Performance Analysis Of Multiple Faults Rifki Arief Munandar; Nofirman Firdaus; Halim Rusjdi; prayudi prayudi
KILAT Vol 9 No 2 (2020): KILAT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/kilat.v9i2.1065

Abstract

Chiller is one source of electricity consumption in buildings. For this reason, keeping the performance of the chiller always at optimum is necessary to limit excessive energy consumption. This paper aims to analyze the performance of the chiller against multiple failures, namely the reduction in condenser and evaporator water that occurs simultaneously (Multiple faults). Secondly, knowing the effectiveness of operating parameters that can detect these multiple failures. In conducting the analysis, we use experimental data conducted by Comstock. The data will be processed and then one variable regression equation will be sought to see the effect of multiple failures on chiller performance and chiller operating parameters to detect multiple failures. From the regression equation for multiple failures we compare it to the normal conditions of the chiller. The results show that for some load ranges, chiller performance drops, while in other ranges chiller performance is better. While the parameters (TCO-TCI) and (TEI-TEO) can detect this multiple failure for the entire load
Analisis Kinerja PLTS dan Validasi Menggunakan Simulasi Pvsyst di Green Hydrogen Plant PLTGU Muara Tawar Agung Sufryanche Luden; Prayudi Prayudi; Retno Aita Diantari
Jurnal Multidisiplin Indonesia Vol. 4 No. 3 (2026): September: Jurnal Multidisiplin Indonesia
Publisher : PT. ALHAFI BERKAH INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62007/joumi.v4i3.931

Abstract

This study evaluates the actual performance of an 80.5 kWp rooftop PV system integrated with a Green Hydrogen Plant (GHP) at PLTGU Muara Tawar and validates the results using PVsyst simulation. The evaluation was conducted based on actual operational data during January–December 2025 using parameters of energy production, Performance Ratio (PR), Capacity Factor (CF), and Specific Yield. The results show actual energy production of 104,739 kWh/year with an average PR of 71%, CF of 15%, and Specific Yield of 1,301 kWh/kWp/year. PVsyst simulation predicted a PR of 82.39% with energy production of 120,566 kWh/year, resulting in a deviation of 11.39 percentage points in PR and 13.1% in energy production. The loss diagram analysis identified temperature effects (9.45%) as the main cause of deviation, followed by module mismatch (2.05%), inverter losses (1.81%), and ohmic wiring losses (1.02%). Field factors such as soiling, module degradation, and differences in actual irradiation with the Meteonorm database also contribute to the lower actual performance. This study recommends routine panel cleaning, layout evaluation to minimize mismatch, and module temperature monitoring to bring actual performance closer to its design potential.
Co-Authors Agung Sufryanche Luden Halim Rusjdi Nofirman Firdaus Retno Aita Diantari Rifki Arief Munandar