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All Journal FLYWHEEL : Jurnal Teknik Mesin Untirta WIDYAKALA JOURNAL Jurnal Teknik Mesin Indonesia Jurnal Engine: Energi, Manufaktur, dan Material International Journal of Mechanical, Industrial and Control Systems Engineering
Nur Hayati
Program Studi Teknik Mesin, Universitas TIDAR
Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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 1 
CFD (Computational Fluid Dynamic) untuk menganalisis head loss akibat perubahan diameter Nur Hayati; Adi Purwanto; Erwan Muladi
Jurnal Teknik Mesin Indonesia Vol. 18 No. 2 (2023): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v18i2.441

Abstract

Piping systems with many supporting components are used to drain water. Connections or elbows result in head loss, namely the loss of flow in the system. Headloss is the loss of flow energy which is significantly affected by flow velocity. This study aims to analyze head loss due to variations in elbow diameter. The elbows used have diameters of 1, 2, 4, and 6 inch. Based on the simulation results and the results of nomograph calculations using the ASME B16.9 B16.28 standard, it can be seen that head loss decreases with increasing elbow diameter. The simulation results show similar results to the calculations from the nomograph.
Studi Permukaan Produk Berbahan PLA Hasil Fabrikasi Menggunakan Mesin 3D Printer Jenis Fused Deposition Modelling (FDM) dengan Variasi Kecepatan Printing Hariyanto, Satriawan Dini; Nurhayati, Nurhayati; Badrawada, I Gusti Gde
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 7 No. 2 (2023)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v7i2.1575

Abstract

A study of the surface of the fabrication process using the fused deposition modeling (FDM) technique is needed to determine the suitability of the process parameters with the use of the product to be made. Products that have special characteristics that take advantage of the surface properties of fabricated using FDM are often encountered in technical applications involving fluids. This research is a preliminary study of the Water Contat Angle (WCA) study on polymer filaments made of PLA. In this study, the effect of printing speed on the width of polymer deposition and the gap distance between one deposit and another polymer deposit on the sample surface was observed and analyzed using image processing techniques. The printing speed is made to vary from 30 mm/s, 60 mm/s, and 90 mm/s. The relationship between printing speed and polymer deposition width produces a linear equation y = 0.0008 x + 0.28 and the gap width between filament deposition on the sample surface shows a linear equation relationship y = -0.0002 x + 0.0833 
Application of Gravity Force on Banana Cutting Machines Nur Hayati; Raka Mahendra Sulistiyo
International Journal of Mechanical, Industrial and Control Systems Engineering Vol. 2 No. 2 (2025): June :IJMICSE: International Journal of Mechanical, Industrial and Control Syst
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmicse.v2i2.298

Abstract

Indonesian people love to consume bananas as fruit. Many sources of nutrients, including minerals and carbohydrates, are contained in this fruit. Various UMKM (Usaha Mikro, Kecil dan Menengah) have grown by developing processed banana foods such as sale and banana chips. An important step in making processed banana dishes is cutting the bananas. In general UMKM still process bananas using conventional techniques, namely cutting using manual human power. The purpose of this study is to utilize gravity to design a banana cutting machine. Gravity will cause the banana pieces to fall into the storage container. The dimensions of the cutting machine are designed with a small size to facilitate mobility. The results showed that the use of a cutting machine increased the efficiency of banana cutting. A more uniform cutting thickness was achieved.
Experimental Study on the Effect of Air Flow Rate Variation on the Performance of a Three-Phase Airlift Pump With an Injector Angle of 15° Maulana, Rizki; Fajarningrum, Nurmala Dyah; Hayati, Nur; Saleh, Arif Rahman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.35498

Abstract

Rivers in Indonesia are heavily polluted, with the main source of pollution coming from industrial waste, including poorly managed mining activities. The airlift pump is used to lift liquid or sediment from a water reservoir that has a lower elevation through a vertical pipe that is partially submerged in the water. This research aims to determine the effect of air flow rate on the performance of the airlift pump during operation under three-phase flow conditions. The performance of the airlift pump is examined through several parameters: superficial velocity, effectiveness, efficiency, and flow patterns. In this study, a tank measuring 50x50x50 cm and a 2.54 m tall acrylic pipe are used as the riser to facilitate the lifting of three-phase flow to the separator component that separates the three phases located at the end of the riser. With a submergence ratio of ¾ h or 1.905 m and using variations of air flow rates of 30, 40, 50, and 60 LPM. The results of this research confirm that increasing air flow rate enhances superficial velocity in all three phases. At air flow rates of 30-50 LPM, the efficiency increases from 4.18 ×10-3 % and peaks at 5.14 ×10-3 %. At 60 LPM, it decreases to 4.88 ×10-3 %. The highest effectiveness reaches 1.281 at an air flow rate of 60 LPM. The optimal flow pattern occurs in slug flow and transitions towards churn flow.
Experimental Analysis of Water Column Height and Air Flow Rate Effects on Two-Phase Airlift Pump Performance Fidaroin, Arsyad Ni'am; Mujiarto, Sigit; Hayati, Nur; Saleh, Arif Rahman
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.35639

Abstract

This study experimentally investigates the effects of water column height and air flow rate on the performance of a two-phase airlift pump with a 15° injector angle. Two water column heights  and  and four air flow rates (30, 40, 50, and 60 LPM) were tested in a laboratory-scale setup. Efficiency was calculated using the Nicklin model, while effectiveness was determined based on the ratio of water to air mass flow rates. Flow patterns were recorded and analyzed using a high-speed camera. The results showed that increasing the water column height significantly improved both efficiency and effectiveness, with the highest values—12.270% and 2354.78, respectively achieved at  and 60 LPM. Flow pattern observations revealed that slug flow dominated at partial submergence, whereas churn flow became prevalent at full submergence with higher air flow rates. The findings demonstrate that optimizing submergence ratio, air flow rate, and injector configuration is essential for achieving high-performance and energy-efficient airlift pump operation.
Analysis of Energy Saving Potential Through Rooftop PV System Implementation at Atria Hotel, Magelang City Hayati, Nur; S, Arbye; Aziizudin, Achmad; -, Diyono; Ceren, Tiko Es Saputra
WIDYAKALA JOURNAL : JOURNAL OF PEMBANGUNAN JAYA UNIVERSITY Vol 12, No 2 (2025): Urban Lifestyle and Urban Development
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat UPJ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36262/widyakala.v12i2.1510

Abstract

The growing energy demand in the hospitality sector highlights the urgent need for efficient and environmentally friendly renewable energy sources. This study investigates the potential for energy savings in hotel buildings through the implementation of rooftop photovoltaic (PV) systems in Magelang City, with a case study at Atria Hotel. The methodology involved analyzing secondary data on solar energy potential, estimating available rooftop area, simulating PV system capacity, and evaluating energy production and economic savings based on the hotel’s laundry energy requirements. The results indicate that Magelang has substantial solar energy potential, with an average Global Horizontal Irradiance (GHI) exceeding 4.8 kWh/m²/day. At Atria Hotel, a rooftop PV system with a capacity of 4.58 kWp can generate approximately 6,656 kWh of electricity annually, meeting around 25% of the laundry facility’s electricity demand. This implementation translates into annual electricity cost savings of IDR 2,635,136.73. These findings demonstrate that rooftop PV systems represent a strategic solution for enhancing energy efficiency and advancing sustainable hotel development in Magelang City.
Co-Authors -, Diyono Achmad Aziizudin Adi Purwanto Arbye S Ceren, Tiko Es Saputra Erwan Muladi Fajarningrum, Nurmala Dyah Fidaroin, Arsyad Ni'am Hariyanto, Satriawan Dini I Gusti Gde Badrawada Maulana, Rizki Mujiarto, Sigit Raka Mahendra Sulistiyo Saleh, Arif Rahman Saleh, Arif Rahman