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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN International Journal of Applied Technology Research Jurnal Difusi
Sunardi, Cecep
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Experimental Investigation on PM10 and PM2.5 Concentrations in North Bandung Wellid, Ismail; Nurfitriani, Nita; Falahuddin, Muhamad Anda; Simbolon, Luga Martin; Sunardi, Cecep; Nuryati, Neneng; bin Sukri, Mohamad Firdaus
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.124

Abstract

North Bandung is an area where there are several tourist attractions, including the Dago Dream Park. The main road to several locations in North Bandung is via the road in front of Terminal Dago. For this reason, the purpose of this study was to collect data on PM2.5 and PM10 concentrations at both locations, namely in front of Terminal Dago and Dago Dream Park. Data collection was carried out for seven days, from Monday to Sunday, from 08.00 to 16.00 local time. To evaluate air quality in these two places, the national standard, namely PPRI No. 22 of 2021 and international standards from WHO were applied. The measurement results show that the concentrations of PM2.5 and PM10 in these two locations are still within the national standard. Meanwhile, when evaluated with WHO standards, PM10 concentrations in both locations are still within standard, but for PM2.5, there are several days where the air quality is out of the standard. The average concentrations of PM2.5 and PM10 during the 7 days of measurement at Terminal Dago are 19.9 μg/m3 and 21.6 μg/m3, respectively. While the average concentration of PM2.5 and PM10 during 1 week of data collection were 18.9 μg/m3 and 19.9 μg/m3, respectively. This means that the concentration of PM2.5 and PM10 at Terminal Dago is slightly higher than that of at Dago Dream Park. In addition, based on an evaluation using national standards, Dago Dream Park tourist attractions still have good air quality and are safe for local residents and tourists. From the data recorded at the Health Centre (Puskesmas), the number of ARI cases in the two locations in 2020 and 2021 is relatively not much different.
Numerical Investigation of the Effect of Changes in Glass Typeon the Cooling Load in a Building Sunardi, Cecep; Mitrakusuma, Windy Hermawan; Pradita, Didiet Tricahya; Kasni, Sumeru; Sulaimon, Shodiya
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 1 (2024): February 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i1.145

Abstract

Solar radiation enters the building through the glass by both radiation and conduction. The heat passing through the glass is one of the largest cooling loads. Therefore, modifying the glass type, will potentially reduce the cooling load significantly. This numerical study uses Cooling Load Temperature Difference (CLTD) method to calculate the change in cooling load in a five-story hospital. The Glass material was changed from clear glass to coated glass. Based on the calculation of cooling load per hour, from 07.00 to 19.00, it is obtained that the peak load occurs at 17.00, both when using clear glass clear and coated glass. The replacement of clear glass with coated glass results in a 70.0% decrease in radiation cooling load, from 104.59 kW to 31.38 kW. In addition, replacing this type of glass will reduce the total cooling load by 17.0%, from 418.80 kW to 347.57 kW. The decrease in total cooling load will lead to a decrease in the operational cost of the air conditioning system. If it is assumed that the AC system operates at 75% peak load for 16 hours per day, then replacing the glass will reduce electricity costs by approximately Rp. 43.6 million/month.
Health Risk Analysis Due To PM10 and PM2.5 Exposure in Ambient Air in Bandung Regency Sunardi, Cecep
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 3 (2024): October 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i3.192

Abstract

This study aims to identify and analyze non-carcinogenic health risks posed by Particulate Matter (PM10 and PM2.5) exposure in Bandung Regency. The region is experiencing increased emissions of air pollutants due to rapid economic and population growth, especially in industrial and traffic-intensive areas. The study was conducted using the Environmental Health Risk Analysis (EHRA) technique to estimate the public health risks due to PM10 and PM2.5 exposure. Data were obtained through interviews, questionnaires, and direct measurements for PM10 and PM2.5 concentrations. The results showed that the average concentrations of PM10 and PM2.5 in the industrial area of Soreang-Kopo highway were higher (61 μg/m³ for PM10 and 46 μg/m³ for PM2.5) compared to the non-industrial area of Soreang-Ciwidey highway (30 μg/m³ for PM10 and 20 μg/m³ for PM2.5), but still below the quality standards set by regulation, PP RI No. 22 of 2021 which are 55 μg/m³ for PM2.5 and 75 μg/m³ for PM10. The highest level of health risk or RQ for PM10 and PM2.5 is 0.50 so it is declared safe (RQ<1), but even so there are 4 respondents who show RQ values>1, so further risk management is needed such as reducing pollutant concentrations, exposure time, and exposure frequency.
PELATIHAN DAN PEMBERIAN SARANA PERALATAN PENDUKUNG SERVICE DAN MAINTENACE DI BALAI LATIHAN KERJA KABUPATEN KUNINGAN Margana, Ade Suryatman; Hermawan Mitrakusuma, Windy; Setyawan, Andriyanto; Wellid, Ismail; Sunardi, Cecep; Khakim, Nur
Jurnal Difusi Vol. 7 No. 1 (2024): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/difusi.v7i1.4537

Abstract

Melihat minat masyarakat Kabupaten Kuningan dalam bidang pelatihan keterampilan sangat besar, demi terciptanya Lembaga Pelatihan yang sesuai dengan kebutuhan pasar kerja, maka kiranya perlu diadakan kerjasama dengan Politeknik Bandung. Dengan adanya kerjasama ini diharapkan agar dapat meningkatkan kompetensi dan kualitas BLK yang siap menciptakan tenaga kerja untuk mengisi dunia kerja atau usaha mandiri, sehingga dapat mengurangi tingkat pengangguran. Kondisi sarana dan prasarana di BLK kurang memenuhi standar Pelatihan Berbasis Kompetensi sehingga belum sesuai dengan perkembangan teknologi. Oleh karena itu, UPTD BLK Dinas Tenaga Kerja dan Transmigrasi Kabupaten Kuningan membutuhkan peningkatan sarana dan prasarana pelatihan. Salah satu kebutuhan yang diajukan oleh BLK Kuningan adalah Peningkatan Kompetensi instruktur pada bidang Pelatihan Refrigerasi. Permasalahannya adalah untuk memenuhi kebutuhan tersebut diperlukan peralatan perlengkapan perbaikan dan perawatan (service and maintenance) unit refrigerasi dan tata udara domestik untuk digunakan dan diberdayakan sebagai sumber pelatihan instruktur dan calon tenaga kerja pada bidangnya. Peralatan yang dibutuhkan untuk pelatihan keterampilan (skill) terdiri dari tool sets, pompa vacuum, peralatan las gas, manifold gauge, flaring and swaging tools dan tang amper sebagai alat uji performansi sistem sedangkan untuk peningkatan pengetahuan (knowledge) dilengkapi modul pelatihannya. Program pengabdian kepada masyarakat akan memberikan luaran para instruktur yaitu memiliki pengetahuan dan peningkatan keterampilan bidang refrigerasi dan tata udara domestik terutama keterampilan tentang perawatan dan perbaikan yang meliputi instalasi AC Split, proses pemvacuuman, pengisian refrigeran, pendeteksian kebocoran, proses pump down dan uji performansi sistem. Tenaga pelatihan/ instruktur trainer dalam program pelatihan PkM ini adalah beberapa staf pengajar di Jurusan Teknik Refrigerasi dan Tata Udara.
Perbaikan Kualitas Akustik di Masjid Bahrul Ulum P4TK BMTI Kota Cimahi Dengan Metode Pengaturan Ulang Posisi, Ketinggian Dan Jenis Speaker Supriyadi, Tata; Ashari; Utomo, T.B.; Susanto, Farid; Sunardi, Cecep; Herlambang, Sanam
Jurnal Difusi Vol. 6 No. 1 (2023): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/difusi.v6i1.4552

Abstract

Masjid Bahrul Ulum merupakan Masjid yang terletak di belakang kantor Balai Besar Pengembangan dan Penjaminan Mutu Pendidikan Vokasi Bidang Mesin dan Teknologi (BBPP MPV BMTI). Secara fisik masjid sudah melakukan renovasi terutama di bagian interior. Pemasangan plafon dari bahan PVC yang telihat rapi dan indah mempunyai karakteristik akustik yang kurang baik karena dapat memantulkan suara yang dapat mengakibatkan gema yang cukup kuat. Di tambah lagi dengan posisi penempatan speaker yang diletakan di keempat sudut ruang masjid yang dinilai kurang tepat karena dapat memperparah suara pantul yang mengakibatkan kejelasan suara (Clarity) berkurang dan tingkat kekerasan suara (SPL-Sound Pressure Level) di tiap area masjid tidak merata. Untuk mengatasi permasalahan akustik di dalam masjid sudah dilakukan penataan ulang penempatan posisi, ketinggian, arah dan jenis speaker yang tepat supaya bisa menghasilkan kualitas akustik yang lebih baik. Metode yang digunakan untuk memperbaiki kondisi akustik tersebut yaitu dengan mengatur ulang posisi, ketinggian, arah dan jenis loudspeaker yang digunakan. Dari hasil pengujian diperoleh SPL yang merata di kisaran 75-80 dB dan ada peningkatan Clarity sebesar 8% setelah penataan ulang speaker. Kata Kunci: akustik, posisi & arah speaker, persepsi subjektif, SPL, Clarity.
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 Andriyanto Setyawan Ashari bin Sukri, Mohamad Firdaus Herlambang, Sanam Hermawan Mitrakusuma, Windy Kasni Sumeru Khakim, Nur Margana, Ade Suryatman Mitrakusuma, Windy Hermawan Muhamad Anda Falahuddin Muhammad Akmal Nurfitriani, Nita Nuriyadi, Muhammad Nuryati, Neneng Pradita, Didiet Tricahya Shodiya Sulaimon Simbolon, Luga Martin Supriyadi, Tata SUSANTO, FARID Utomo, T.B. Wellid, Ismail