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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) ROTOR: JURNAL ILMIAH TEKNIK MESIN PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Engine: Energi, Manufaktur, dan Material International Journal of Applied Technology Research Indonesian Journal of Laboratory International Conference on Industrial Revolution for Polytechnic Education
Nuriyadi, Muhammad
Teknik Refrigerasi Dan Tata Udara, Politeknik Negeri Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences

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Numerical analysis and simulation of unitary air conditioning system using heat exchanger with hydrocarbon refrigerant Nuriyadi, Muhammad
International Conference on Industrial Revolution for Polytechnic Education Vol. 3 No. 3 (2021): International Conference on Industrial Revolution for Polytechnic Education
Publisher : PolinemaPress

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

Abstract

The environmental issues to be addressed, particularly in refrigeration and air conditioning, is the destruction of ozone layer and the effects of global warming due to the usage of un-environmental friendly refrigerant, as R22, or generally synthetic refrigerant. These refrigerants had high ODP and GWP. One alternative refrigerant is hydrocarbon refrigerant (HC). Hydrocarbons have several advantages such as environmental friendly and replace the previous refrigerant, without replacing components, and less filling need. The working pressure is also lower, thus reducing the power consumption. With these advantages, the Hydrocarbon refrigerants are good alternative. In other hand, to improve performance of refrigeration system is by lowering the temperature of liquid line using heat exchanger. In this study, numerical simulation was conducted to examine the effect of liquid to suction heat exchanger utilization on the performance of a unitary air-conditioning system using hydrocarbon refrigerant as a cooling fluid. The results are, heat exchanger utilization increases refrigeration effect by rising of effectivity, the highest increasing is about 7%. LSHX also rise up the compression work with increase of effectivity by 19%. Coefficient of performance (COP) and relative capacity index decrease by 5%. Decreasing of performance is higher in the unit that operates at higher temperature.
Bull Sperm Motility Measurement Improvement Using Sperm Head Direction Angle Akbar Akbar; Eros Sukmawati; Dwi Utami; Muhammad Nuriyadi; Iwan Awaludin; Priyanto Hidayatullah
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 4: August 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i4.8685

Abstract

It is well known that sperm motility is the most important parameter in measuring sperm quality. Sperm motility can be measured manually by a medical veterinarian or using Computer Aided Sperm Analysis (CASA) system. Measuring bull sperm motility manually is the most popular method nevertheless it has major drawbacks which are subjective and high variability. CASA gives consistent results, hence it is an expensive system. Therefore, an alternative method is required. In this paper, a method to measure bull sperm motility was proposed, It was using ellipse detection and sperm head direction angle. The video samples were taken using a digital microscope. Compared with the manual assessment by medical veterinarians, the proposed method gave the average absolute margin of 5.16% which surpassed the previous method which gave 10.69%.
Optimasi Sistem Boiler dengan Variasi Pengaturan Temperatur Muhammad Nuriyadi; Faldian Faldian
Jurnal Engine: Energi, Manufaktur, dan Material Vol 3, No 2 (2019)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v3i2.584

Abstract

In the air conditioning system, hot water boilers are used for the purpose of room heating and reheating processes. In tropical countries, the function of space heating is carried out for process rooms, while the function of hot water for the reheating process is widely used. In this case, the hot water produced by the boiler is used for the reheating process in the Air Handling Unit (AHU). In the process of energy conservation, to reduce the use of energy in boiler systems, especially in air conditioning systems to make it more efficient, it is necessary to take steps to save energy along with the evaluation process of energy use, identify opportunities for energy savings, and recommendations for increasing efficiency in energy use. This study aims to evaluate the boiler system to ensure that the design of the boiler system can work and produce planned air conditioning, as well as assess energy-saving opportunities. Boiler system performance testing is done by setting various variations in the temperature of the hot water output, which is 50 oC, 60 oC, 70 oC, and 80 oC. Testing is done by looking at how long it takes to reach the set temperature. After that, each increase in temperature is calculated as the resulting efficiency. The average combustion energy consumption in the boiler is 50.23 kJ/s. The average energy transferred to hot water is 39.82 kJ/s. Overall the highest efficiency of the boiler system is achieved at a set temperature of 80 oC, which is 71.5 %.
Analisis Numerik Simulasi Kinerja Sistem Tata Udara Unitary Menggunakan Liquid-Suction Heat Exchanger dengan Refrigeran Hidrokarbon Nuriyadi Muhammad
Jurnal Engine: Energi, Manufaktur, dan Material Vol 2, No 2 (2018)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.731 KB) | DOI: 10.30588/jeemm.v2i2.419

Abstract

One of the environmental issues to be addressed, particularly in the field of refrigeration and air conditioning, is the destruction of the ozone layer and the effects of global warming due to the use of environmentally inefficient refrigerants. In the field of Refrigeration and Air Conditioning, refrigerant as a cooling medium, plays an important role, and until now there is still the use of refrigerant materials that are not environmentally friendly, generally synthetic refrigerant. One alternative refrigerant replacement against the synthetic refrigerant is hydrocarbon refrigerant (HC). On the other hand, several ways can improve the performance of refrigeration system by lowering the temperature of liquid line using liquid to suction heat exchanger. In this study, a numerical simulation was conducted to examine the effect of using liquid to suction heat exchanger on the performance of a unitary air-conditioning system using hydrocarbon refrigerant as a coolant fluid. The results are, liquid to suction heat exchanger increase refrigeration effect by raising heat exchanger effectivity, the highest increase is about 7%. But the use of LSHX also rises up the compression work by increasing heat exchanger effectivity by 19%. So the Coefficient of performance (COP) and relative capacity index decrease by 5%. Decreasing performance is higher in the unit that operates at higher temperatures.
Energy and Exergy Analysis of Chest Freezer Using R134a and R290 as Working Fluids Based on Experimental Data Pramudantoro, Triaji Pangripto; Muliawan, Rizki; Nuriyadi, Muhammad; Hidayat, Syarif; Tohir, Toto; Sulaimon, Shodiya
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 2 (2024): June 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i2.153

Abstract

Although R134a has a very high global warming (GWP) effect, it is still used as a refrigerant in chest freezers. As an alternative to R134a is R290 which has a very low GWP value, which is only 3. Therefore, it is expected that there will be no more chest freezers using R134a and replaced with R290, soon. Thermodynamic studies need to be conducted to see the advantages and disadvantages of the two refrigerants based on experimental data. In this study, a chest freezer which was originally manufactured for R134a with a charging mass of 150 g was used as a test object. Experimental data of the chest freezer using R290 was taken after testing with R134a was completed. Experimentally, the cabin temperatures of the chest freezer using R134a and R290 are -20.5oC and -35.7oC, respectively, and the input power are 264 W and 176 W, respectively. Total irreversibility on the four main components of the chest freezer using R134a is greater than using R290, namely 184.4 W and 107.0 W, respectively. This means that the use of R290 as a working fluid in the chest freezer is more efficient. There are at least three advantages of replacing R134a with R290, namely reducing greenhouse gas emissions because R290's GWP is much smaller than R134a, lower cabin temperature, and decreasing the input power of the chest freezer.
Peningkatan Kompetensi Instruktur Balai Latihan Kerja Kabupaten Karawang dalam Bidang Perawatan dan Perbaikan Lemari Pendingin Showcase: Increasing the Competence of Instructors at Karawang Regency Vocational Training Center in the Maintenance and Repair of Showcase Refrigerator Wellid, Ismail; Falahuddin, Muhammad Anda; Arman, Muhammad; Surjanto, Ary; Sumeru, Kasni; Nuriyadi, Muhammad; Setyawan, Andriyanto
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 9 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i9.9856

Abstract

A showcase is a type of refrigerator widely found in small shops and supermarkets, and it maintains the freshness of vegetables, fruits, meat, and drinks. Because showcases are widely used, the potential for working as a technician or entrepreneur in showcase service is promising. This training aims to improve the competence of instructors at BLK Karawang in showcase maintenance and repair. Increased instructor competence impacts the quality of job seekers educated at BLK. The training was carried out in 3 working days, divided into two sessions: theory and practical. The practical material taught participants the proper refrigerant charging, troubleshooting, and repairs on showcases that experienced problems. After the training, the instructors will be evaluated on their ability to deliver the materials to job seekers under the supervision of lecturers from the Department of Refrigeration and Air Conditioning Engineering, Politeknik Negeri Bandung. Based on the evaluation, the instructors have correctly and adequately provided training materials on showcase maintenance and repair to job seekers.
Pengembangan Mikrokontroler ESP 32 Sebagai Alat Akusisi Data Untuk Monitoring Kinerja Sistem Refrigerasi Dan Tata Udara Sunardi, Sunardi; Nuriyadi, Muhammad
Indonesian Journal of Laboratory Vol 8, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijl.v8i1.99889

Abstract

Training unit yang ada di laboratorium refrigerasi masih banyak menggunakan pengukuran secara manual. Pengambilan data secara manual sangat tergantung pada pengamatan manusia yang mana keakuratan dan waktu pengambilan data tidak stabil dan tingkat akurasinya rendah. Untuk itu perlu dikembangkan alat akuisisi data  menggunakan mikrokontroler esp32 sebagai pengolah data dengan dilengkapi sensor suhu DS18B20, sensor arus litrik SCT013 dan sensor tegangan ZMPT101B. Dari pengembangan alat ini menghasilkan luaran berupa alat monitoring yang mampu menyimpan data pengukuran secara real time dan akurat untuk kegiatan pembelajaran. Dari hasil analisis diperoleh bahwa pengukuran parameter sistem tata udara dengan menggunakan Akuisisi Data (DAQ ESP-32) menghasilkan pengukuran yang dinamis, lebih akurat dan tepat dibandingkan pengukuran manual. selisih perbedaan parameter berkisar antara 4 sampai dengan 10 persen.
OPTIMIZATION AND PREDICTION OF CENTRAL AC SYSTEM PERFORMANCE WITH RESPONSE SURFACE METHODOLOGY (RSM) MODELING Nuriyadi, Muhammad; Akmal, Muhammad; Sunardi, Cecep
ROTOR Vol. 17 No. 2 (2024)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v17i2.53067

Abstract

Optimizing AC system performance is important to optimize energy consumption, especially at partial load. The aim of this research is to obtain a performance model of the central AC system based on its operational conditions which include environmental air conditions, heat load conditions and other operational parameters, so that the performance of the AC system can be optimized which includes cooling capacity, power consumption and energy efficiency ratio. Data is obtained by experiment, then analyzed by Response Surface Methodology (RSM) to obtain optimal system performance. This research resulted in models of AC performance with coefficient of correlation (R2) of 0.9745, 0.2041 and 0.8965 for cooling capacity, power consumption and EER respectively. By analysis of varians for models, it is obtained that Model F-values are 9920.83, 313.45, and 2245.59 for cooling capacity, power and EER respectively, and implied that the models are significant. The Adequate precision ratios were 1078.33, 93.08, and 344.32 for those parameters respectively, and indicated the adequate signals. The optimum results obtained were a cooling capacity of 46.7 kW, compressor power consumption of 4.48 kW, and an energy efficiency ratio of 8.5. Keywords: Performance; Central air conditioning; Prediction; Optimization; RSM.
Co-Authors Akbar Akbar Andriyanto Setyawan Ary Surjanto Dwi Utami Eros Sukmawati Falahuddin, Muhammad Anda Faldian Faldian Iwan Awaludin Kasni Sumeru Muhammad Akmal Muhammad Arman Muliawan, Rizki Pramudantoro, Triaji Pangripto Priyanto Hidayatullah, Priyanto Shodiya Sulaimon Sunardi Sunardi Sunardi, Cecep Syarif Hidayat Toto Tohir Wellid, Ismail