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All Journal Jurnal Rekayasa Hijau International Journal of Applied Technology Research Industrial Research Workshop and National Seminar Jurnal Pendidikan Teknik dan Vokasional Jurnal Polimesin
Simbolon, Luga Martin
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Air Pollutant of PM10 and PM2.5 on Air Quality Index in Business Center Kota Baru Parahyangan, West Bandung District Wellid, Ismail; sugiyarto, sugiyarto; Simbolon, Luga Martin; Nur Fajrina, Gema Adzani; Nuryati, Neneng; bin Sukri, Mohamad Firdaus
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.v5i2.163

Abstract

Kota Baru Parahyangan is located between Cimahi City and Padalarang. As an area designed as a satellite city, Kota Baru Parahyangan has various facilities including a business centre. In the present study, PM10 and PM2.5 will be measured at three business centres and one residential location located at the southernmost point for comparison. Data collection was carried out on 2 weekdays, namely Monday and Tuesday, and 2 weekends, namely Saturday and Sunday. The data collection time is from 08:00 to 15:30, where data collection is carried out every 30 minutes. Based on these measurements, PM10 and PM2.5 concentrations in three business centre locations and 1 residential location are still under the PPRI No. 22 of 2021 standards. Meanwhile, when evaluated using Kepmen LHK No. 14 of 2020, the API level for PM10 in three business centre locations and 1 residential location is in the "Good" category. However, the API level for PM2.5 in three business centre locations and 1 residential has reached the "Moderate" category. This means that the concentration of PM2.5 in business centre and residential in Kota Baru Parahyangan should be seriously considered by developer and local government. Because it is confirmed that PM2.5 concentrations will continue to increase over time with increasing activity and an increase in the number of vehicles passing through a region.
Evaluasi Kenyamanan Termal dan Kualitas Udara Dalam Ruang di Pujasera Politeknik Negeri Bandung Annisa, Poetri Noer; Prasetyo, Bowo Yuli; Simbolon, Luga Martin
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 9, No 1 (2025)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v9i1.22-31

Abstract

AbstrakKenyamanan termal dan kualitas udara dalam ruang merupakan faktor penting yang memberikan dampak bagi produktivitas penghuni, tidak terlepas bagi bangunan Pujasera. Penelitan ini bertujuan untuk mengevaluasi kenyamanan termal dan kualitas udara di Pujasera berdasarkan Indeks Standar Pencemar Udara (ISPU) dan standar ASHRAE 55. Parameter kualitas udara yang dikaji meliputi karbon monoksida (CO), PM₂.₅, dan PM₁₀, sedangkan  untuk kenyamanan termal, parameter yang digunakan antara lain Predicted Mean Vote (PMV) dan Predicted Percentage of Dissastisfied (PPD). Penelitian menggunakan pendekatan kuantitatif dengan pengambilan data secara langsung pada tiga waktu berbeda selama dua hari. Selain itu, penyebaran kuesioner digunakan untuk menghimpun data mengenai tingkat metabolisme dan insulasi pakaian. Hasil penelitian menunjukkan kualitas udara di dalam Pujasera  berada pada kategori sedang, kecuali pada siang hari dengan ISPU PM₁₀ berada pada tingkat yang sangat tidak sehat. Sementara itu, aspek kenyamanan termal menunjukkan bahwa 51.29% penghuni merasa nyaman. Melihat kondisi ini, maka perlu dilakukan upaya untuk menunjang kenyamanan termal dan kualitas udara yang lebih baik bagi penghuni.Kata kunci: kualitas udara, kenyamanan termal , PMV, PPD AbstractThermal comfort and indoor air quality are important factors that affect occupant productivity, including Pujasera building. This study aims to evaluate thermal comfort and air quality in Pujasera based on the Air Pollution Standard Index (ISPU) and ASHRAE standard 55. The air quality parameters examined include carbon monoxide (CO), PM₂.₅, and PM₁₀, while the thermal comfort parameters include Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD). The study used a quantitative approach with direct data collection at three different times over two days. In addition, questionnaires were distributed to gather data on metabolism and clothing insulation. The results of the study showed that the air quality inside the food court was in the moderate category, except during midday when the PM₁₀ ISPU reached an unhealthy level. Meanwhile, thermal comfort aspects indicated that 51.29% of occupants felt comfortable. Therefore, efforts are needed to improve thermal comfort and better indoor air quality for the occupants.Keywords: air quality, thermal comfort, PMV, PPD
UJI KINERJA FREEZER MENGGUNAKAN DIMETHYL ETHER SEBAGAI REFRIGERAN PENGGANTI R134a Mawaddati Sofwah Utami; Mitrakusuma, Windy Hermawan; Simbolon, Luga Martin; Rosulindo, Parisya Premiera
Jurnal Pendidikan Teknik dan Vokasional Vol. 6 No. 1 (2023): Jurnal Pendidikan Teknik dan Vokasional
Publisher : LPPM, Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JPTV.6.1.19

Abstract

R134a is widely used as a refrigerant in refrigeration systems, but this refrigerant has an impact on increasing global warming. This impact can be reduced by using dimethyl ether as an alternative refrigerant to replace R134a. In this research, the performance of dimethyl ether was tested as a substitute refrigerant for R134a in refrigeration system applications in the form of freezers. Tests were carried out by comparing the performance of the freezer when using refrigerant R134a and using dimethyl ether refrigerant. The use of dimethyl ether in the test was varied based on mass, namely 60 grams, 70 grams and 80 grams, or in percentages as much as 30%, 46.7% and 53.3% of the total mass of R134a. The results of this test indicate that the COP value for freezer performance is higher when using dimethyl ether than when using R134a, the efficiency is higher than refrigerant R134a, and the compressor power is lower than R134a. Testing for variations in the mass of dimethyl ether that approached the condition of R134a was at a mass of 70 grams, so that the amount of refrigerant filled with dimethyl ether as a substitute for R134a was reduced to 46,7% of the amount of R134a.
ANALISIS PENGARUH DESIKAN JENIS SILICA GEL TERHADAP KELEMBABAN DAN PENURUNAN BEBAN LATEN PADA AIR HANDLING UNIT (AHU) DX SISTEM Hidayatullah, Puguh; Simbolon, Luga Martin; Prasetyo, Bowo Yuli
Jurnal Pendidikan Teknik dan Vokasional Vol. 6 No. 2 (2023): Jurnal Pendidikan Teknik dan Vokasional
Publisher : LPPM, Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JPTV.6.2.88

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh desikan terhadap penyerapan uap air dan penurunan beban laten yang dilakukan pada Air Handling Unit (AHU). Upaya yang akan dilakukan yaitu menggunakan desikan jenis silica gel pada ducting bagian outside air yang telah tersedia, sehingga udara tersebut akan diserap kadar uap airnya oleh desikan yang mengakibatkan kadar uap air menurun dan kualitas udara menjadi lebih kering. Hasil yang diperoleh dari pengujian desikan pada AHU adalah adanya penurunan kelembaban yang memiliki nilai tertinggi 165 g/s dan penurunan beban laten 380,20 kW lalu beban koil 116,65 kW dengan persentase penurunan beban koil sebesar 41%.
Designing of Evaporator Length in Very Low Temperature Chest Freezer by using Environmentally Friendly Refrigerant R290 Sumeru, Kasni; Nugraha, Ridwan; Badarudin, Apip; Simbolon, Luga Martin; bin Sukri, Mohamad Firdaus; Yuningsih, Nani
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4103

Abstract

Chest freezers generally use R600a or R134a as working fluids. When using R600a, the minimum cabin temperature is only -10oC, whereas when using R134a, it can reach -25oC. The purpose of this study is to calculate the evaporator length of a chest freezer that uses R290 as a refrigerant so that its cabin temperature can reach below 35 oC, lower than the cabin temperature of a typical chest freezer. Calculation of the evaporator pipe length is done using the forced convection heat transfer equation to calculate the heat transfer coefficient inside the evaporator pipe and natural heat transfer to calculate the heat transfer coefficient outside the evaporator pipe.  Based on the calculations, the chest freezer has a compressor capacity of 200 W, an evaporator length of 3.57 m, and a diameter of 3/8 inch or 9.52 mm. The test results show that the temperature of the chest freezer cabin can reach -36oC in the 36th minute with a cooling capacity of 289 W, while the input power and COP are 198 watts and 1.46, respectively. Compared to R134a, the use of R290 is more advantageous. In addition to lower cabin temperatures, it is also much more environmentally friendly, because the GWP (global warming potential) value of R134a is much higher than that of R290. It means that the use of R290 as a working fluid in the chest freezer will significantly reduce emissions of gases that cause global warming.
Investigation Of Automotive Air Conditioning Using Eco-Friendly R600a As An Alternative Refrigerant To R134a Sumeru, Kasni; Arman, Muhammad; Wellid, Ismail; Simbolon, Luga Martin; Setyawan, Andriyanto; bin Sukri, Mohamad Firdaus
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4463

Abstract

One of the main reasons for replacing R134a with R600a is the impact of global warming. In this study, a numerical approach was applied to investigate changes in automotive air conditioning (AAC) performance due to the replacement of R134a with R600a. A thermodynamic evaluation was carried out with evaporating and condensing temperatures of 5oC and 45oC, respectively. The study simulates AAC performance at five engine rotation speeds: 1000, 2000, 3000, 4000 and 5000 rpms. The results show that replacing R134a with R600a reduces the cooling capacity and input power by 45.42% and 47.02%, respectively. However, due to the dominant decrease in input power as compared to the decrease in cooling capacity, the COP of AAC increases by 2.93%. Although the increment in COP is relatively small, this replacement greatly contributes to the reduction of greenhouse gas emissions that causes the problem of global warming due to the lower GWP of R600a as compared to R134a.
Analisis Kenyamanan Ruang Berbasis Aspek Termal dan Visual pada Kafe X di Kota Bandung Kirana, Meta Nur; Simbolon, Luga Martin; Rosulindo, Parisya Premiera; Nuryati, Neneng
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6699

Abstract

Kenyamanan ruang merupakan faktor penting dalam menciptakan suasana yang mendukung aktivitas pengguna, terutama pada ruang publik seperti kafe. Penelitian ini bertujuan untuk menganalisis tingkat kenyamanan termal dan visual pada salah satu kafe di Kota Bandung. Penelitian ini menggunakan metode kuantitatif dan kualitatif. Pendekatan kuantitatif dilakukan melalui pengukuran langsung menggunakan Thermogun, Anemometer, dan Hot Wire Anemometer, mengacu pada standar SNI 03-65722001 untuk kenyamanan termal dan SNI 6197:2020 untuk pencahayaan. Selain itu, analisis PMV (Predicted Mean Vote) dan PPD (Predicted Precentage of Dissatisfied) dilakukan berdasarkan standar ASHRAE 55 (2017). Pendekatan kualitatif dilakukan melalui penyebaran kuesioner kepada pengguna ruang untuk mengetahui persepsi kenyamanan mereka. Hasil penelitian menunjukkan bahwa temperatur udara berkisar antara 24,17°C hingga 26,55°C, kelembapan antara 56,82% hingga 66,43%, dan kecepatan udara 0,15–0,16 m/s. Nilai PMV berada pada rentang -0,27 hingga +0,50, dan PPD di bawah 10%, yang mengindikasikan kondisi termal yang masih cukup nyaman berdasarkan standar ASHRAE. Pencahayaan tercatat antara 150200 lux, di mana beberapa titik masih berada di bawah standar minimum SNI. Secara keseluruhan, kondisi ruang di kafe tidak memenuhi standar kenyamanan, namun diperlukan peningkatan pada aspek pencahayaan dan kelembapan untuk mencapai kenyamanan optimal bagi pengguna.
Co-Authors Andriyanto Setyawan Annisa, Poetri Noer Badarudin, Apip bin Sukri, Mohamad Firdaus Erham, Eddy Fauziah , Mira Febriani, Feby Hidayatullah, Puguh Julyanti, Annissa Ayu Kasni Sumeru Kirana, Meta Nur Mawaddati Sofwah Utami Mitrakusuma, Windy Hermawan Muhamad Anda Falahuddin Muhammad Arman Najmudin, Hafid Nani Yuningsih, Nani Nugraha, Ridwan Nur Fajrina, Gema Adzani Nurfitriani, Nita Nuryati, Neneng Pramudantoro, Triaji Pangripto Prasetyo, Bowo Yuli Putra, Teguh Erdinda Raji, Lukman Rosulindo, Parisya Premiera Septiyany, Risma Sugiyarto Sugiyarto Sumeru, Husain Akbar Sunardi, Cecep Syarif Hidayat Tresna, Agisnia Tritjahjono, Rachmad Imbang Wardana, Muhammad Iqro Mahesa Wellid, Ismail Wirenda Sekar Ayu Yudi Prana Hikmat