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Jurnal Ilmiah Poli Rekayasa
Published by Politeknik Negeri Padang
ISSN : 18583709     EISSN : 26853922     DOI : 10.30630/jipr
Core Subject : Education,
Education
Jurnal Ilmiah Poli Rekayasa adalah jurnal ilmiah yang diterbitkan 2 edisi dalam setahun, bulan April dan Oktober. Terbit sejak tahun 2005. Fokus Kajian jurnal ini adalah Fokus kajian artikel dalam JPR mencakup Mechanical Engineering, Civil Engineering, dan Electronica, Electricty dan Telecomunication EngineeringLingkup Jurnal Ilmiah Poli Rekayasa meliputi : 1) Energi terbarukan (rewnable energy), 2) Inovasi kendaran bermotor hemat BBM, 3) Material Maju, 4) Emisi dan pembakaran motor bakar, 5) Rekayasa termal dan fluida, 6) Rekayasa power plant, 7)Material komposit, 8) Biomaterial, 9)Teknologi pengujian tak merusak (Non Distruction Test/NDT), 10) Kontrol dan mekatronika, 11) Planing untuk pengurangan resiko bencana, 12) Sistem transportasi antar moda, 13) Rekayasa konstruksi, bangunan, jembatan dan Jalan, 14) Manajemen daerah aliran sungai, air tanah, sedimen dan waduk, 15) Remote Sensing Harap baca panduan ini dengan seksama. Penulis yang ingin mengirimkan artikel ke Jurnal Ilmiah Poli Rekayasa, harus mengikuti panduan penulisan. Jika artikel yang dikirim tidak sesuai dengan panduan penulisan atau ditulis dalam format yang berbeda, maka akan DITOLAK oleh editor sebelum ditinjau lebih lanjut. Para editor hanya menerima artikel yang memenuhi format yang ditetapkan. Artikel ditulis dalam bahasa indonesia. Jurnal Ilmiah Poli Rekayasa menggunakan prosedur penilaian Double Blind. Dimana antara penulis dengan mitra bestari tidak saling mengenal identitasnya masing-masing. Silahkan kirimkan artikel anda dan untuk unduh Template DI SINI Etika Publikasi dapat dilihat pada tautan berikut ini : ETIKA PUBLIKASI.
Arjuna Subject : -
Articles 179 Documents
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ANALISIS TEKNO-EKONOMI KINERJA PEMBANGKIT LISTRIK TENAGA SURYA UNTUK FASILITAS PUBLIK DI KAWASAN WISATA PUNCAK LABUANG Pribadi, Rizki Aditio; Fitriadi, Fitriadi; Asrul, Junaidi; Firmansyah, Firmansyah; Herisajani, Herisajani; Yuhaidizen, Yuhaidizen
Jurnal Ilmiah Poli Rekayasa Vol 20, No 2 (2025): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.20.2.406

Abstract

This article discusses the performance analysis of solar power plants for public facilities reviewed from a techno-economic perspective using the Homer application. The research location in this article is the public facility of Surau Nur Jannah in the Puncak Labuang Limau Manis Tourism Area, Padang City. Based on field visits, the community conveyed the limited resources related to the development of the tourism area, one of which is the availability of electrical energy. Based on the problems conveyed by the community, Padang State Polytechnic through the Department of Electrical Engineering provides a solution to the problem of limited electrical energy sources, by offering the concept of Renewable Energy. The initial stage of providing electrical energy sources is to build an Off-Grid Solar Power Plant with a capacity of 240 WP. In order to support the construction of the Solar Power Plant at the specified location, it is necessary to conduct a performance and economic analysis of the development. This location has a fairly large potential for solar resources, on average in one year this place receives solar radiation of 4.91 kWh/m3/Day. The most optimal configuration from the simulation results is a combined system, two units of 1 kW Generic Photovoltaic, Converter, Storage / Battery. The production of electrical energy with this configuration obtains 39.6 kWh/year of electricity with a total consumption in one year of 29.2 kWh/year. The results of the analysis of the power plant's performance from a techno-economic aspect provide positive results, with a Cost Of Energy (COE) of Rp. 1,095.34/kWh. This article aims to provide an understanding of the construction of small-scale power plants for public facilities with minimum costs
METODE PELAKSANAAN PEKERJAAN TANGGUL BIOGAS STUDI KASUS : PROJECT OF BIOGAS (COVERED LAGOON) TO FLARING MSL CARGILL Araska, Wahyu; Fernando, Rangga; Ahmad Syauki, Ilham
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.412

Abstract

Soft soil work is a major challenge in berm construction due to the physical and mechanical characteristics of the soil. Soft soil generally has high moisture content, large porosity, and weak grain structure, which leads to very low soil bearing capacity. These conditions result in the soil being unable to support the construction load optimally, thus increasing the risk of settlement and lateral deformation. These factors create challenges in the planning and execution of earthworks, as specialized methods are required to improve the soil's stability and strength to ensure the berm functions safely and effectively. The proper working methods for handling soft soil can maintain the stability and safety of the embankment. These methods include replacing the original soil, stabilizing the soil using dolken piles and gradual mechanical compaction.The research results show that the success of berm construction is greatly influenced by thorough technical planning and coordination between work stages. This method has proven effective when applied to soft soil and provides constructive solutions to the technical problems that arise in the field.
PENINGKATAN KINERJA MESIN PRESS BAGLOG JAMUR TIRAM MELALUI MODIFIKASI SISTEM KONTROL TEKANAN SILINDER MENGGUNAKAN MAGNET CLUTCH -, Junaidi; Rahman, Riki; Anderson, Sir; Priyanda, Eko; Safitri, Ramadani
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.422

Abstract

Manual and semi-mechanical baglog production for oyster mushrooms in Indonesia, particularly in Padang West Sumatra, has suffered from low capacity, inconsistent quality, and operator fatigue. In this study evaluated performance improvements of a baglog pressing machine through modification of magnetic clutch integration and cylinder pressure control mechanism. The modification included installing a magnet clutch with supporting components (bushing, plate disk, clutch housing), motor and gearbox shafts, redesign of the pressing plate, and dual-opening chamber. Several technique was employed such as reducer speeds (30 to 90 rpm) and threaded rod adjustments distance (1.5 to 6.5 cm). Production capacity, cycle time, efficiency, and baglog density were investigated. Based on results, the  production capacity increased from approximately ±20 baglogs/hour (manually)to 120–270 baglogs/hour after modification, while the pressing cycle time decreased to as low as 13.33 s/baglog. The baglog density increased from about ±0.65 g/cm³ to ~0.709–0.900 g/cm³, with 80–90% process efficiency. Therefore, the magnetic clutch enabled precise engagement/disengagement control, enhancing safety and cycle precision. Overall, the modified machine provided an efficient for improving productivity, quality, and ergonomics for for SME’s sector mushroom production.
ANALISIS KENDALA PENERAPAN BANGUNAN HIJAU DI INDONESIA Partawijaya, Yan; Aktorina, Wahyu; Hamid, Desmon
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.414

Abstract

The construction and building sector have a crucial role in the economy and sustainable development in Indonesia. Green Buildings refer to buildings that pay attention to energy saving, proper water use, waste processing.The implementation of Green Buildings in Indonesia was launched in 2002 through Undang Undang No 28 tahun 2002 dan Peraturan Menteri PUPR No 21 tahun 2021 tentang Penilaian Kinerja Bangunan Hijau. The benefits of implementing Green Buildings include buildings that optimize energy use, utilize the environment to achieve good room quality such as air circulation and lighting, and process waste into something useful. Despite the many benefits of green buildings, the development of green building implementation in Indonesia is relatively slow. Barriers that cause the slow implementation of green buildings in Indonesia can be grouped into Financial, Regulatory, and Market Readiness issues. The parties responsible for encouraging the increased implementation of green buildings in Indonesia are categorized as Financial and Monetary, Private Business Entities, Organizations, and the Government. Strategies that can be implemented to encourage the increase in green buildings in Indonesia include Regulatory Adjustments, Building Mapping and Project Flow Creation, and Grants to Obtain Green Building Certification.    
PERANCANGAN ALAT PEMECAH KULIT KEMIRI TIPE DOUBLE ROLL DENGAN BAHAN ST37 KAPASITAS 82 KG/JAM Anderson, Sir; Zulhendri, Zulhendri; Nasirwan, Nasirwan; Safitri, Ramadani; Salam, Pandu Abdi
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.429

Abstract

Candlenut (Aleurites moluccana L. Wild) is an economically valuable plantation commodity in Indonesia; however, post-harvest handling is largely conducted using conventional shelling methods, which are inefficient and often cause seed damage, reducing quality and market value. Previous studies have investigated operational parameters of double roll shellers, such as rotational speed, roll spacing, and hopper width, yet most focused on one or two parameters in isolation, without comprehensively assessing the relationship between production capacity, shelling effectiveness, and kernel quality, nor comparing machine performance with traditional methods used by farmers. This research addresses that gap by designing and evaluating a double roll candlenut sheller made of ST37 steel with a target capacity of 82 kg/hour, considering production capacity, shelling efficiency, and kernel quality simultaneously. The design process included literature review, physical and mechanical characterization of candlenuts, structural and transmission system design, and calculations for power requirements and component safety. Results indicated that the maximum force required to shell two candlenuts simultaneously is 3,418.46 N, with a total machine power of 4,012.80 W (≈5.38 hp); applying a service factor of 1.2, a 6.5 hp gasoline engine was selected. Shafts, pulleys, V-belts, and gears were designed to ensure torque, shear stress, and deflection remain within safe limits. The machine operates at a roll speed of 150 rpm, achieves the targeted production capacity, and reduces kernel damage, thereby increasing the value of candlenuts for farmers. This integrated design approach provides a practical and efficient alternative to conventional shelling methods.
PENGEMBANGAN SIMULATOR FETAL BERBASIS KONTROL SUARA UNTUK PENGUJIAN ALAT FETAL DOPPLER -, Royan; Mukti Wibowo, Kusnanto; Latif, Abdul; Ishartomo, Farid; Tirta Nadi, Danu; Mulyanto, Arif; Rofiqoch, Isnaeni
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.424

Abstract

Fetal Doppler is a diagnostic tool to detect fetal heart rate in BPM (beats per minute). Like other medical devices, it must be calibrated periodically by a health facility testing center, as stated in the Regulation of the Minister of Health of Indonesia Number 54 of 2015 article 4 paragraph 1. Article 8 paragraph 1 explains that testing or calibration of medical devices is carried out periodically at least once a year. In addition, testing must be carried out after repairs to medical devices as stated in SNI IEC 62353 of 2014. In addition to testing and calibration, medical devices need to be maintained and tested for function. Therefore, a fetal doppler simulator is needed by medical device technicians to test the function of the fetal doppler. The innovation made on this device is that the simulator is connected to a smartphone with the aim of minimizing electronic components, eliminating settings with buttons and replacing them with Voice Control on the smartphone. This fetal doppler simulator is successfully designed well, it can simulate fetal heart rate from 60-240 BPM with error value of 0% at settings of 90,120,150,180, and 240 BPM. While at setting 60 BPM there is an error value of 1.6%. This simulator is suitable for use as a reference for fetal doppler function test because the error value is below the tolerance of ±5 for BPM on fetal Doppler.
MODEL REGRESI LINEAR UNTUK PREDIKSI BIAYA KONSTRUKSI AKIBAT PERUBAHAN GAMBAR AS BUILT DRAWING Nugroho, Agus; Maulina, Uflahul
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.415

Abstract

Construction projects are inherently complex and highly susceptible to variations in cost due to discrepancies in work volumes across technical design documents such as Detail Engineering Design (DED), Shop Drawing (SD), and As-Built Drawing (AD). These discrepancies often arise from design adjustments, field conditions, or execution errors, which in turn affect budget accuracy and project efficiency. Such inconsistencies in volume are particularly critical in structural works like reinforcement and concrete, as these elements account for a substantial portion of total project costs. When changes in volume occur, the corresponding cost implications must be accurately estimated to maintain financial control and avoid cost overruns. This research aims to quantitatively predict the effect of volume deviations on cost variations using simple linear regression analysis. Data were collected from nine building samples that had complete documentation of DED, SD, and AD. The study focuses on structural work units with measurements in kilograms (kg) and cubic meters (m³). Regression models were assessed based on statistical indicators such as the coefficient of determination (R²), p-value, intercept, and regression coefficients to determine the most reliable model. The results show that every additional 1 kg of reinforcement volume increases the cost by Rp19,303.00, while every additional 1 m³ of concrete adds Rp1,321,597.14 to the project cost. Both models achieved R² = 1.00, indicating perfect predictive accuracy in estimating cost variations due to volume changes. Manual validation confirmed that the predicted values were nearly identical to actual data with a negligible error rate. These results confirm that simple linear regression is a powerful yet practical analytical tool for predicting construction costs. The model developed in this study provides a scientific foundation for improving cost estimation accuracy, supporting effective budget planning, and mitigating financial risks in construction projects.
PERANCANGAN DAN IMPLEMENTASI ALAT PENGECEKAN KABEL NURSECALL BERBIAYA RENDAH SEBAGAI ALTERNATIF MULTIMETER Latif, Abdul; Mukti Wibowo, Kusnanto; -, Royan
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.426

Abstract

Cables in nurse call systems generally have considerable length and are distributed across multiple installation points, making them vulnerable to faults such as broken wires, loose connections, or continuity problems. These conditions can disrupt communication between patients and medical staff, potentially reducing the quality of healthcare services. Therefore, checking cable continuity before and after the installation process is a crucial step to ensure that each line is properly connected and that the nurse call system operates optimally and reliably. This study designs and tests a low-cost prototype device for checking the continuity of nurse call cables, consisting of two modules: Device A as a 9-volt power source and Device B as a two-line LED-based indicator. The novelty of this research lies in the use of a simple non-microcontroller circuit with direct visual indicators, specifically designed for on-site nurse call cable inspection as a practical alternative to conventional multimeters. The research method includes circuit design, prototype development, and field testing on cables with various length variations, followed by a functional comparison with conventional testing methods. The test results indicate that the device is capable of reliably detecting cable conditions through LED indicators that turn on or off during each test, with a high level of consistency. In addition, its low production cost and ease of use provide practical contributions for technicians involved in the installation and maintenance of nurse call systems, particularly in field conditions that require fast and efficient inspection.
RANCANG BANGUN FETAL DOPPLER NIRKABEL BERBASIS ESP32 DAN NRF24L01 UNTUK TRANSMISI AUDIO DAN NILAI FHR Nurfathoni, Aditya Lutfi
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.427

Abstract

Fetal doppler is an important device for monitoring fetal heart rate (FHR) as an early indicator of pregnancy condition. However, conventional fetal doppler devices still rely on cables between the probe and the main unit, thus limiting movement, reducing the comfort of pregnant women, and increasing the risk of cable damage. This study aims to design and build a wireless fetal doppler module based on ESP32 and nRF24L01 on the Taff Omicron JLS-T501 device for wireless transmission of doppler audio signals and FHR values. The developed system consists of a transmitter module on the probe side that performs acquisition, conditioning, and digitization of audio signals, then transmits data via nRF24L01, as well as an ESP32-based receiver module that reconstructs doppler audio and displays FHR values via an IoT interface. Testing was conducted using a fetal heart rate simulator at several BPM categories and distance variations (20–200 cm) to evaluate FHR accuracy, audio quality, and communication reliability. The results showed that the FHR reading error against the reference value was in the range of 1-2%, with audio quality remaining clearly audible up to a distance of 200 cm without interruption. This indicates that the integration of a wireless module on the JLS-T501 fetal doppler can improve flexibility and ergonomics of use without sacrificing measurement accuracy.

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