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All Journal AUSTENIT Turbo : Jurnal Program Studi Teknik Mesin APTEK Indonesian Journal of Engineering and Science (IJES) MACHINERY: Jurnal Teknologi Terapan Jurnal Masyarakat Madani Indonesia Jurnal Foundry International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
HIDAYATI, BAITI
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Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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PERANCANGAN HEAT EXCHANGER SISTEM PEMANAS AIR BERBASIS SISTEM REFRIGERASI R410a Dzaky, Muhammad Irfan; Rifa’i , Ahmad Imam; Anwar, Zainuri; Hidayati, Baiti; Satya Ramadhoni, Tri; Okviyanto, Toni; Sumarna, Herlin; Zikri, Ahmad; Nasution, Ghifari
JURNAL FOUNDRY Vol. 7 No. 1 (2024): JURNAL FOUNDRY
Publisher : LPPM Politeknik Manufaktur Ceper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62944/jf.v7i1.103

Abstract

Ketersediaan air panas dalam lingkungan apartemen memiliki peran krusial dalam memberikan kenyamanan, kebersihan, dan efisiensi bagi penghuninya. Perancangan sistem inovatif pemanas air yang menggabungkan prinsip dasar refrigerasi menjadi sorotan utama, dengan fokus pada pemahaman mendalam mengenai beragam sumber energi, termasuk pemanfaatan energi listrik, tenaga surya, dan panas buangan AC. Keselamatan penggunaan pemanas air juga ditegaskan sebagai hal yang penting, dengan penekanan pada risiko kebakaran akibat kelalaian dan tersengat aliran listrik. Tujuan utama penelitian ini adalah untuk merancang sistem pemanas air yang efektivitas berbasis sistem refrigerasi. Metode penelitian difokuskan pada perancangan sistem pemanas air (Air Conditioning Water Heater/ACWH) dengan prinsip refrigerasi R410a. Hasil perhitungan mengenai dimensi pipa tembaga yang optimal untuk memanaskan air hingga temperatur yang diinginkan, serta faktor termal yang terlibat, dijelaskan secara rinci. Heat exchanger yang digunakan adalah tipe double pipe dengan ukuran panjang pipa tembaga 16,68 meter mampu efektif memanaskan air dari 27°C menjadi 50°C dengan aliran 100 L/jam dengan ukuran diameter pipa 3/8 inci dan 1 1/8 inci dengan dimensi heat exchanger secara keseluruhan 106 cm x 69,3 cm.
Evaluasi Kinerja Efisiensi Heat Recovery Steam Generator (HRSG) di Pembangkit Listrik Tenaga Gas dan Uap (PLTGU): Studi Kasus di PT PLN (Persero) Sektor Pembangkit Keramasan Sumarna, Herlin; Hidayati, Baiti; Ramadhoni, Tri Satya; Dzaky, Muhammad Irfan; Okviyanto, Toni; Rifa'i, Ahmad Imam; Anwar, Zainuri
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 01, Desember 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i1.3044

Abstract

Heat Recovery Steam Generator (HRSG) adalah komponen penting dalam sistem Pembangkit Listrik Tenaga Gas dan Uap (PLTGU) yang memanfaatkan panas sisa dari gas buang turbin gas untuk menghasilkan uap yang digunakan dalam turbin uap. Efisiensi HRSG berperan signifikan dalam meningkatkan efisiensi termal keseluruhan siklus gabungan (combined cycle) PLTGU. Penelitian ini bertujuan untuk mengevaluasi kinerja dan efisiensi termal HRSG berdasarkan data operasional harian, serta membandingkannya dengan efisiensi desain dan standar industri. Berdasarkan hasil perhitungan, efisiensi termal aktual rata-rata HRSG adalah sebesar 82,90%, dengan nilai tertinggi sebesar 83,21% pada hari ketiga dan terendah sebesar 82,28% pada hari kelima. Nilai ini masih berada dalam kisaran standar efisiensi HRSG, yaitu 75-85% menurut referensi yang digunakan (V. Ganapathy, 1996), dan hanya berbeda sedikit dari efisiensi desain sebesar 85,91%. Perbedaan efisiensi ini disebabkan oleh fluktuasi laju alir massa bahan bakar serta variasi kondisi operasi lainnya. Kesimpulan dari penelitian ini menunjukkan bahwa efisiensi termal HRSG yang dioperasikan masih berada dalam batasan yang diinginkan, meskipun terdapat ruang untuk perbaikan lebih lanjut guna mencapai efisiensi yang mendekati desain. Optimasi operasi dan pemeliharaan rutin direkomendasikan untuk mempertahankan dan meningkatkan efisiensi sistem secara keseluruhan
Experimental study of the effect of inclination angle variations of the turbine shaft on the Archimedes screw turbine efficiency Anwar, Zainuri; Dzaky, Muhammad Irfan; Rifa'i, Ahmad Imam; Hidayati, Baiti; Sunarso, Edi
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3692

Abstract

Archimedes Screw turbine is a type of turbine that can operate at low heads. One of the parameters that influences turbine performance is the tilt angle of the turbine shaft. This research aims to determine the effect of the turbine shaft tilt angle on the performance of the Archimedes screw turbine using experimental methods. The experiment was carried out in the river of Pematang Gajah Village, Jambi Province, by varying the tilt angle of the turbine shaft, namely 10°, 20°, 30°, 40°, and 50°. The test results showed that the highest turbine efficiency occurred at a turbine tilt angle of 30° with an average efficiency value reaching 78%. This condition occurs because the flow through the turbine blade is less compared to other turbine shaft tilt conditions so that the fluid force is completely converted into energy. The electrical energy produced by turbine generators can reduce dependence on electricity supplies from the central grid and become more energy-independent. In addition, stable and affordable energy sources can improve the quality of life and support the social and economic development of society.
LIQUID SMOKE PRODUCTION FROM PALM KERNEL SHELL PYROLYSIS: COMPARING COLD AIR AND CONVENTIONAL CONDENSATION METHODS Sipahutar, Riman; Bizzy, Irwin; Hidayati, Baiti
Indonesian Journal of Engineering and Science Vol. 6 No. 2 (2025): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v6i2.186

Abstract

Gas condensation is one of the problems in the liquid smoke production process. Uncondensed gas will have an impact on the liquid smoke produced and air pollution. Here, several methods are applied to determine the percentage level of liquid smoke produced by the gas condensation process. The condensation method uses conventional normal water, gas condensation using cold water, and gas condensation using cold air. The raw materials used are oil palm shells with a size of -4+5 mesh, a pyrolysis temperature of 300-4000C, and a liquid smoke production process for 300 minutes. Based on the test results, gas condensation occurs optimally in the cold air method, with the results of 22% liquid smoke, 64% charcoal, and 14% non-condensed gas. Compared with the condensation of the standard water method, the condensation method of cold air is superior to 36.36% for liquid smoke to minimize air pollution by up to 48%. The results of this study indicate that temperature and fluid effect the effectiveness of the gas condensation process, thereby increasing the yield of liquid smoke and reducing air pollution during the liquid smoke production process.
ANALISIS PENGARUH TOTAL DRY SOLID BLACK LIQUOR TERHADAP EFISIENSI RECOVERY BOILER Sumarna, Herlin; Hidayati, Baiti; Ramadhoni, Tri Satya; Okviyanto, Toni; Anwar, Zainuri; Rifa’i, Ahmad Imam
MACHINERY Jurnal Teknologi Terapan Vol. 4 No. 2 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.8085820

Abstract

In the pulp and paper industry, a large amount of biomass (wood) has been used and produces by-products or residues resulting from the industry including wood bark, remaining logging and black liquor which is one of the main biomass resources that can be used for energy purposes. Aside from being a fuel, the recovery boiler process can convert black liquor into green liquor, where green liquor will be needed in the pulp production process. Writing this journal aims to determine the effect of total dry solids in black liquor on the efficiency of recovery boilers. The analysis was carried out using energy calculations in the recovery boiler for five days. From the calculation results it is known that there is a decrease and increase in boiler recovery efficiency, this is caused by several factors, including the heat absorption process experienced by the boiler feed water, the mass of black liquor, and the percentage of total dry solids. The total dry solid will affect the water content that will enter the combustion chamber, the higher the % TDS the more water content will enter the combustion chamber and this will affect the recovery efficiency of the boiler. The highest boiler recovery efficiency calculation results occurred on the first day, namely 65.24% and the lowest boiler recovery efficiency calculation results occurred on the fourth day, namely 62.96%.
PENGARUH UKURAN BIJI JARAK PAGAR TERHADAP LAMANYA NYALA API DAN TEMPERATUR YANG DIHASILKAN PADA KOMPOR Mila, Andika Nopriansyah; Junaidi, Ahmad; Arnoldi, Dwi; Witjahjo, Soegeng; Hidayati, Baiti; Rizal, Syamsul; Medi, Ali
MACHINERY Jurnal Teknologi Terapan Vol. 4 No. 3 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10122361

Abstract

The availability of fuels, especially fossil fuels, is increasingly scarce, concerns about meeting energy needs in the future are increasing. In urban areas, fuel gas (LPG) is generally used for daily cooking, while in rural areas, kerosene is more commonly used. This significant oil content opens up the possibility to use castor beans as fuel directly. Therefore, in this study the author conducted an experiment entitled "The Effect of Jatropha Bean Size on Fire Intensity and Temperature produced on the Stove". The variable used is jatropha beans weighing 350 grams in each form of castor bean roughness, namely: whole, peeled, coarse and fine. Where the results obtained from the research that has been carried out are whole castor beans with a flame for 93 minutes and a temperature of 314.7 °C, peeled to produce a flame for 85 minutes and a temperature of 433.3 °C, coarsely crushed to produce a flame for 73 minutes and a temperature of 498.8 °C, and finely crushed to produce a flame of 65 minutes and a temperature of 519 °C. So it can be concluded from the data produced, the larger the size of the castor bean, the more time the fire is and the finer the roughness of the castor bean fence, the higher the resulting temperature.
Geothermal Power Generation: Harnessing Electrical Energy Through The Organic Rankine Cycle (ORC) System Zikri, Ahmad; Sumarna, Herlin; Hidayati, Baiti; Anwar, Zainuri; Putri, Fenoria; Zamheri, Ahmad; Negash, Semir M; Nasution, Gaizka Ghifari
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 2 No. 1 (2024): IJMEAS - January
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v2i1.235

Abstract

The research employs a thermodynamic simulation method using an Engineering Equation Solver (EES), relying on theoretical calculations. This method is integrated into a geothermal power plant, precisely focusing on geothermal source temperatures of approximately 95ºC. The investigation centers on the heat transfer process within a high-temperature heat transfer fluid from geothermal sources, conveying stored heat to the Organic Rankine Cycle (ORC) evaporator. Three specific working fluids, R134a, R11, and R22, examine working fluid selection for ORC at 95ºC. The results highlight the R11 organic fluid as an optimal compromise, excelling in two crucial criteria. Firstly, R11 exhibits the highest net mechanical power, = 34.81 kW compared to alternative fluids. Secondly, it boasts the best energetic efficiency of the cycle, registering  = 16.01%, outperforming both R134a ( = 13.17%) and R22 ( = 12.64%). In summary, this study conducts a focused analysis of the energy aspects of an Organic Rankine Cycle (ORC) for electricity production using geothermal sources and organic fluids. Operating at a geothermal source temperature of 95ºC with a water flow rate of 80 lt/s and environmental conditions at 20ºC, the parametric study emphasizes the superiority of the R11 organic fluid. R11 emerges as the optimal choice, demonstrating the highest net mechanical power and superior energetic efficiency compared to alternative fluids, thereby contributing valuable insights to advancing sustainable and efficient energy technologies.
Static Analysis of Electric Vehicle Prototype Frame Ramadhoni, Tri Satya; Rifa'i, Ahmad Imam; Anwar, Zainuri; Hidayati, Baiti; Sumarna, Herlin; Okviyanto, Toni; Sampurno, Rachmat Dwi
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 2 No. 1 (2024): IJMEAS - January
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v2i1.242

Abstract

This study aims to determine the strength of the prototype car frame created by the SMES (Sriwijaya Mechanical Engineering Squad) team in participating in the KMHE (Energy Efficient Car Contest) and SEM (Shell Eco-Marathon). This prototype vehicle is an energy-efficient car with an electric motor drive and utilizes a hollow rectangular tube-shaped frame with aluminum 6061 material. The overall dimensions of the car frame are 2500x410x540 mm. Static loading analysis was conducted using manual calculations and computer simulations. Static loading was performed on seven support bars, the main bar, and the overall prototype car frame. Applied loads include the electric motor load, control panel, battery load, driver's body load, driver's legs, front body load, rollbar body load, rear body load, and reaction loads from bars receiving direct loads. Autodesk Inventor software with frame analysis features was used in the simulation process. Based on the results of manual calculations and computer simulations, the difference in the average results of maximum bending moment, maximum stress, and displacement on the seven types of support bars, with a small error tolerance below 10%, is 1.01%, 5.24%, and 3.25%, respectively. Based on computer simulation results for the main bar and seven types of support bars, the highest maximum stress occurs in the main bar, which is 128727.37 N.
AIR MOISTURE ANALYSIS OF POTATO DEHUMIDIFICATION PROCESS USING THE REFRIGERATION SYSTEM HIDAYATI, BAITI; ., Baharuddin; Wahyudi, Reza
AUSTENIT Vol. 12 No. 1 (2020): AUSTENIT: April 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.951 KB)

Abstract

The refrigeration system is one of the technologies used to condition thetemperature of the air either by heating or cooling, in general refrigeration iscommonly used for human comfort needs and also for the freezing process. Inthis research, refrigeration is used for the process of drying potatoes using adehumidification method, which is the reduction of moisture in the air vapor.Potatoes will be cooled using a refrigeration process and then will be heatedusing a heater, data collection is carried out at a temperature of 600C heater, withdata collection each of 60 minutes, 120 minutes and 180 minutes. From theresults obtained, the dehumidifier method using a refrigeration system can drypotatoes to shrink 60% and humidity can be reduced to 83.3%.
PENERAPAN SISTEM REFRIGERASI PADA ALAT PEMBUAT ASAP CAIR UNTUK PENGOPTIMALAN HASIL PRODUKSI Sumarna, Herlin; ., Haryanto; Hidayati, Baiti; Homzah, Ozkar F
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Recently, liquid smoke is widely used for various needs, both for food purposes and for freezing rubber latex. Liquid smoke began to grow due to the large demand, also using biomass / waste as a base material. Immediate production results are needed by the condensation process. The application of the refrigeration system guides the temperature of the air which is used as a cooling medium in the condensation process during the process of making liquid smoke. This study uses coconut shell as raw material for pyrolysis, and there are 4 temperature variations that are applied in the liquid smoke production process. First without a refrigeration system, the application of a refrigeration system with temperature variations of 22 ° C, 18 ° C and the last one is 15 ° C. The data is taken every 30 minutes for 6 hours. Based on the research results, it was found that the maximum production results using the refrigeration system at an air temperature of 15 ° C, resulted in 375 ml of liquid smoke. Keywords: Liquid Smoke, Refrigeration, Pyrolysis, Coconut Shell
Co-Authors Ahmad Imam Rifa’i Ahmad Junaidi Ali Medi Anwar, Zainuri Arnoldi, Dwi Baharuddin Patandjengi Biola, Yolanda Darus, Imam Fahrezi, M. Rifki Ferry Irawan Haryanto . Homzah, Ozkar F Irwin Bizzy Mila, Andika Nopriansyah Muhammad Irfan Dzaky Nasution, Gaizka Ghifari Nasution, Ghifari Negash, Semir M Okviyanto, Toni Putri, Fenoria Ramadhani, Kgs.M.Octarian Ramadhoni, Tri Satya Ramadhony, Tri Satya Rasid, Muhammad Rifa'i, Ahmad Imam Rifa’i, Ahmad Imam Riman Sipahutar Sampurno, Rachmat Dwi Satya Ramadhoni, Tri Soegeng Witjahjo Sumarna, Herlin Sunarso, Edi Sundari, Ella Syamsul Rizal Wahyudi, Reza Zainuri Anwar Zamheri, Ahmad Zikri, Ahmad