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All Journal IJITEE (International Journal of Information Technology and Electrical Engineering) ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Maritim Polimarin Jurnal Kemitraan Masyarakat
Nugroho, Anang Budhi
Politeknik Maritim Negeri Indonesia
Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation

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Single Phase Full Bridge Inverter Control as Reactive Power Compensator Anang Budhi Nugroho; Eka Firmansyah; Suharyanto Suharyanto
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 1, No 4 (2017): December 2017
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.541 KB) | DOI: 10.22146/ijitee.35539

Abstract

The drop of local load voltage on the distribution system is an indicator that the system experiences reactive power shortage. It can be overcome by an inverter controlled to compensate reactive power. The benefit of the inverter is that it is easily configured with a variety of functions. This paper presents the control configuration of inverter as reactive power compensators. The method used is a current control system of the proportional integrator (PI) – dq based transformation. This method generates reactive power by regulating the current domain (Id, ref = 0), while the current domain (Iq,ref) is set according to the need. Phase locked loop (PLL) is added so that the inverter can be synchronized well with the grid. According to the analysis of the PI current control, the local load voltage is stable at 219.88 Vrms and the reactive power generated by the inverter is 298 VAR with steady state error 0.11% of the reference power without oscillation.
Analisis Rasio Kompresi AC Split R32 yang Diretrofit R290 di Ruang Akomodasi Kapal Ulum, Rizka Noor Miftakhul; Sekti, Irsat Surya; Noviarianto, Noviarianto; Nugroho, Anang Budhi; Supardi, Supardi
Jurnal Maritim Polimarin Vol. 11 No. 1 (2025)
Publisher : PPPM Polimarin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52492/jmp.v11i1.136

Abstract

Air conditioning (AC) systems play a crucial role in maintaining thermal comfort within ship accommodation spaces, especially during operations in tropical climates. However, the use of refrigerants such as R32 raises environmental concerns due to its relatively high Global Warming Potential (GWP). This study aims to analyze the impact of retrofitting 40% by mass of R290 into a 1-HP split AC system originally designed for R32, focusing on the resulting compression ratio and cooling performance. The experimental method involved varying the inlet air temperatures to the evaporator (23°C, 25°C, and 27°C) and condenser (30°C and 35°C). Suction and discharge pressures of the compressor were measured to calculate the compression ratio. The results showed that R32 yielded the highest compression ratio of 3.09 and the lowest at 2.87, while R290 produced a maximum of 2.86 and a minimum of 2.60. These differences reflect the influence of each refrigerant’s thermodynamic properties on compressor operation. R290 demonstrates potential as an environmentally friendly alternative for marine air conditioning systems, although technical adjustments are required to maintain optimal system performance.
Pelatihan Pembuatan Pelet Apung pada UMKM Kelompok Budidaya Ikan Omah Jala Arif Rakhman Suharso; Anang Budhi Nugroho; Ario Hendartono; Wahyu Ari Putranto; Hero Budi Santoso; Akhmad Nuriyanis
Jurnal Kemitraan Masyarakat Vol. 3 No. 1 (2026): Maret : Jurnal Kemitraan Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/jkm.v3i1.2553

Abstract

The extruder-type floating pellet machine is a form of appropriate technology that works by using a screw system to push the raw material while applying pressure to form dense pellets. The main source of raw material for making these pellets comes from trash fish, which are small fish caught by fishermen that are unfit for consumption and have low economic value. Trash fish are relatively cheap because they are classified as non-economical, but they have great potential for use as fish feed. Their distinctive strong aroma can stimulate fish appetite, while their relatively high protein content makes them an ideal source of nutrition. Before use, the trash fish are first dried and then ground using a flour machine to achieve a fine texture. The floured material is then mixed and the moisture content is adjusted to around 42%, so that the extrusion process can run optimally when using the extruder-type pellet machine. The material formulation consists of 70% trash fish meal, 15% corn meal, and 15% wheat flour. The resulting pellets are then tested in a feed laboratory and show protein levels ranging from 30-40%, depending on the quality of the trash fish raw material used. This community service activity involves fish farmer groups in the Beji area, East Ungaran District, which is expected to increase fish farmer insight on how to make floating pellets using an extruder type pellet printing machine.
Analisis Energy Efficiency Ratio (EER) pada AC Split yang Diretrofit dari Refrigeran R32 ke R290 dengan Massa Pengisian 40 Persen Rizka Ulum; Gunawan Budi Santoso; Ngatmin; Susanto; Anang Anang Budhi Nugroho; M. Edi Pujianto
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.10830

Abstract

The extensive use of split-air conditioning in tropical countries raises environmental concerns because of the high global warming potential of R32 refrigerant. The hydrocarbon refrigerant R290 offers a promising alternative with a very low gross pollutant content (less than 4) and a near-zero ozone depletion potential. However, its flammability and impact on performance at reduced charge densities require further investigation. This study assesses the energy efficiency ratio (EER) of 1 PK split AC retrofitted with 40% charge weight from R32 to R290. The experimental tests were carried out under five operating conditions with room temperature of 23-27 degrees Celsius and ambient temperature of 30-35 degrees Celsius. System parameters including pressures, temperatures, compressor power consumption and the flow rate of the refrigerant were measured. The software REPROP was used for the thermodynamic analysis and the EER calculation. The results show that R32 achieves a higher EER (24.59-26.35 Btu per kWh) than R290 (15.33-17.21 Btu per kWh), resulting in a reduction of efficiency of 30-45 percent. Although R290 showed lower power consumption (0.446-0.476 kW compared to 0.76-0.82 kW in R32), the reduced mass flow rate reduced the cooling capacity. The study concluded that the 40 percent R290 retrofit reduces energy consumption but compromises energy efficiency, which requires further research on optimised weight and system components.
Co-Authors Akhmad Nuriyanis Arif Rakhman Suharso Ario Hendartono Eka Firmansyah Gunawan Budi Santoso Hero Budi Santoso M. Edi Pujianto Ngatmin Noviarianto, Noviarianto Rizka Ulum Sekti, Irsat Surya Suharyanto Suharyanto Supardi Supardi Susanto Susanto Ulum, Rizka Noor Miftakhul Wahyu Ari Putranto