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Prasetyo, Bowo Yuli
Jurusan Teknik Refrigerasi Dan Tata Udara, Politeknik Negeri Bandung
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PERANCANGAN SISTEM BRINE COOLING PADA SHOWCASE DAN KABIN HIDROPONIK UNTUK TANAMAN KANGKUNG (IPOMOEA AQUATICA) Arda Rahardja Lukitobudi; Bowo Yuli Prasetyo; M. Fasya Nur Harish; Dimas Alif Fadhil
KURVATEK Vol 6 No 2 (2021): November 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i2.2744

Abstract

Limited area and pollution in the city and also weather problem can become an obstacle to planting kale (Ipomoea Aquatica). Post harvest storage of kale also usually does not conditioned which quickly wilted and not fresh. To create an optimum environment, it was necessary to control environment factors such as air temperature, humidity, light intensity, growing media temperature and humidity, and the availability of nutrients [2]. Tofu and wood waste as a hydroponic nutrients [1] not all area were available so in this research AB Mix nutrient was used. In this research, refrigerated showcase by brine cooling was used [3][4]. Hydroponic planting system method used in this research was Deep Flow Technique which the kale (Ipomoea Aquatica) was planted in a water layer 4-6 cm deep in conditioned showcase of 20-30 0C and 60% humidity. Brine cooling was used to condition the showcase from seed to post harvest and was observed its growth. Post harvest conditioned storage was also complete the showcase more durable. By brine cooling system to cool brine in the range of 70C to 170, the product storage cabin was maintained at 8,70C to 10,50C and the showcase cabin was maintained at 20,40C to 23,60C. The brine cooling system has COPactual of 3,98 and COPcarnot of 6,65 with system efficiency of 59,8%. Keywords: Hydroponic, Ipomoea Aquatica, showcase, brine cooling, Deep Flow Technique.
Simulation of IoT-Based Temperature and Humidity Conditioning System in Screen House Wirenda Sekar Ayu; Bowo Yuli Prasetyo
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 1 (2022): April 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i1.54

Abstract

Nowadays, various problems have arisen in agricultural sector. One of which is the decline in productivity of farmers' crops up to 40% which is caused by non-optimal environmental conditions during the plant growth process. This is certainly a challenge for Indonesian farmers to be able to continue in supplying the country's needs for high quality agricultural products. The challenges faced by Indonesian farmers do not only come from the environmental conditions of plant growth, but the development of Industry 4.0 technology also plays an important role in the development of agricultural sector in Indonesia. In order to adapt to these technological changes, a solution is needed in the form of an integrated agricultural equipment with Industry 4.0 technologies such as the Internet of Things (IoT). One of which is creating an IoT-based control and monitoring system that will be applied to the screen house. In this research, an IoT-based temperature and humidity conditioning system was designed in the screen house. The system design is modeled and tested through simulation on Vensim software. Based on the simulation results of system design, the screen house internal temperature can be controlled or maintained in the optimal temperature range for tomato plant growth, which is 18–24oC with an offside value of ±0.5oC. The heating capacity or heating rate required in this system is 10oC/hour. The cooling capacity or cooling rate generated to compensate the influence of external temperature and heating effect on the screen house internal temperature is 1–1.8oC/hour. The heating and cooling rate values generated in this research are still need to be converted into fan and pump PWM values to be implemented in a fan- pad evaporative cooling system.
Performance Evaluation of Thermoelectric Cooling with Two Difference Fluids Medium Bowo Yuli Prasetyo; Wirenda Sekar Ayu; Fujen Wang
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 1 (2022): April 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i1.74

Abstract

Thermoelectric has been used in various applications related to cooling systems (TEC). Most researchers focused on expanding the application of TEC and improving heat transfer. The improvement of the heat transfer relied on the configuration, heat exchanger, and fluid medium. However, no previous work has reported the influence of air and water as the fluid’s medium on the TEC performance. Therefore, in this study, the performance of TEC with water and air as working fluids is evaluated experimentally. Besides, several input parameters are controlled to evaluate the TEC performance under different conditions. The results reveal that the variation of working fluid and input parameters influenced the overall TEC output. The increment of TEC cooling capacity is proportional to the input power, mass flow rate, and inlet temperature of the working fluid. While the input power and inlet temperature also vary the heat exchanger thermal resistance. The overall thermal resistance of the water block is averagely ten times lower than that of the heat sink, therefore, the water block is significantly better compared to the heat sink. While the highest COP obtained from the water and air system is 1.72 and 1.41, respectively.
SIMULASI NUMERIK DISTRIBUSI POLUSI UDARA DALAM RUANGAN Bowo Yuli Prasetyo; Arda Rahardja Lukitobudi; Ade Suryatman Margana
Jurnal Teknologi Terapan Vol 8, No 1 (2022): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v8i1.377

Abstract

The kitchen is a vital area that provides energy sources through food processing for residences. However, the cooking process can also produce pollutants that are harmful to the body. This study aims to investigate the concentration and distribution of contaminants (CO and CO2) generated from the kitchen to all rooms in the house. In addition, Air temperature and velocity are investigated to observe their relationship with the distribution of pollutants. The investigation procedure utilizes a numerical simulation of a dwelling with two different ventilation cases. The simulation results show no significant difference in air velocity between the two cases. While the addition of natural ventilation in the kitchen area can reduce CO and CO2 concentrations throughout the room by 25.8% and 24.9%, respectively. On the other hand, the indoor air temperature can also be reduced by 4.9% with the same treatment. In conclusion, the addition of a window in the kitchen area has a significant impact on reducing temperature and pollutant concentrations all over the room.
Kaji Eksperimental Termoelektrik Sebagai Sistem Pendingin Alternatif Bowo Yuli Prasetyo; Wirenda Sekar Ayu
Prosiding Industrial Research Workshop and National Seminar Vol 12 (2021): Prosiding 12th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.017 KB)

Abstract

Kaji Eksperimental Termoelektrik Sebagai Sistem Pendingin Alternatif
INVESTIGASI EKSPERIMENTAL PERFORMA SISTEM PENDINGIN MULTI-TERMOELEKTRIK DENGAN KONFIGURASI TERMAL SERI DAN PARALEL Bowo Yuli Prasetyo; Apip Badarudin; A.P. Edi Sukamto; Rizki Muliawan
Jurnal Teknologi Terapan Vol 8, No 2 (2022): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v8i2.427

Abstract

Thermoelectrics can convert electrical energy to thermal energy. The generated thermal energy can be used in various cooling systems (TEC) applications. Improvement of TEC performance influenced by hot-side heat dissipation method, working fluid, and multi-thermoelectric. This study aims to investigate the relation between multi-thermoelectric configuration and the cooling behaviors. The experiment was conducted on the devices equipped with two modules of TEC arranged in series and parallel with variations of input voltage, working fluid mass flow, and temperature. The result reveals variations in cooling behaviors between the two configurations. Parallel configuration TEC gives the highest cooling capacity with a value of 66.62 W, 100% bigger than the series configuration. Meanwhile, the series configuration provides a delta temperature of 11.03 K, 2% higher than the parallel one. The parallel modules cooling performance is the biggest among the two arrangement, with a value of 2.57, which is 147% higher than series one.
Perbandingan Karakteristik Sensor Temperatur LM35 dan DS18B20 Pada Simulator Cerobong Tata Udara Prasetyo, Bowo Yuli; Arman, Muhammad; Darmawan, Gio Putra
Prosiding Industrial Research Workshop and National Seminar Vol 13 No 01 (2022): Vol 13 (2022): Prosiding 13th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (673.28 KB) | DOI: 10.35313/irwns.v13i01.4188

Abstract

Pengukuran temperatur udara pada cerobong tata udara dapat menggunakan berbagai jenis sensor, dan setiap sensor mempunyai karakteristik yang berbeda-beda. Dalam penelitian ini akan dibandingkan tingkat akurasi, presisi dan time constant dari sensor LM35 dan DS18B20 yang dihubungkan dengan mikrokontroler Arduino Atmega2560. Pengujian dilakukan degan membandingkan hasil pembacaan kedua sensor terhadap termokopel menggunakan media cerobong tata udara yang terkondisi dengan lima titik pengukuran. Hasil pengujian menunjukan rata-rata akurasi sensor DS18B20 di setiap titik ukur masing-masing sebesar 99.63%, 94.86%, 89.3%, 95%, dan 98.44%. Sedangkan sensor LM35 menghasilkan nilai akurasi masing-masing sebesar 98.27%, 98.35%, 88.635, 96.33%, dan 98.17%. Hasil pengujian juga menunjukan nilai presisi sensor DS18B20 lebih baik dibandingkan dengan sensor LM35 dengan nilai berturut-turut sebesar 99.85%, 99.84%, 99.85%, 99.85%, dan 99.85%, sedangkan LM35 menghasilkan nilai presisi sebesar 82.13%, 93.14%, 98.24%, 96.51%, dan 95.62%. Sementara itu, sensor DS18B20 memiliki time constant paling lambat dibandingkan sensor lain dengan nilai time constant masing-masing sebesar 88 detik, 90 detik, 92 detik, dan 98 detik, dan sensor LM35 sebesar 60 detik, 72 detik, 74 detik, dan 73 detik.
Kajian Variasi Temperatur Kerja Terhadap Efisiensi Volumetrik Kompresor Piston dan Kinerja Sistem Refrigerasi Kompresi Uap Juliawati, Lola; Mitrakusuma, Windy Hermawan; Prasetyo, Bowo Yuli; Akmal, Muhammad
Prosiding Industrial Research Workshop and National Seminar Vol 14 No 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5356

Abstract

Beberapa jenis kompresor yang sering digunakan salah satunya kompresor piston atau bisa juga disebut sebagai kompresor reciprocating. Kelebihan pada kompresor piston diantaranya mempunyai daerah operasi dengan tekanan kerja yang tinggi serta maintenance yang mudah. Dalam penggunaannya, kemampuan kompresor pada sistem dapat diketahui menggunakan efisiensi volumetrik pada kompresor. Efisiensi volumetrik ini didefinisikan sebagai nilai perbandingan antara volume refrigeran yang dihisap oleh kompresor dengan volume langkah pada kompresor. Penelitian ini dilakukan dengan memvariasikan parameter menggunakan REFPROP Software lalu diintegrasikan dengan Microsoft Excel. Parameter yang divariasikan adalah temperatur kondensasi dan temperatur evaporasi serta superheat. Hasil akhir dari penelitian ini menunjukan kenaikan pada kinerja sistem saat efisiensi volumetrik semakin tinggi pada temperatur evaporasi 10 oC dan temperatur kondensasi 40 oC, serta superheat 0 K. Efisiensi volumetrik tertinggi yang didapatkan yaitu 84,90% dengan faktor clearance 5%. Kapasitas pendinginan tertinggi pada kondisi temperatur kerja tersebut adalah 20,49 kW, dan perbandingan rata-rata kapasitas pendinginan antara katalog kompresor dengan hasil perhitungan pada kondisi tersebut adalah 2,15%.
Kaji Eksperimental Termoelektrik Sebagai Penghasil Air Dengan Variasi Kecepatan Udara Tresna, Agisnia; Prasetyo, Bowo Yuli; Simbolon, Luga Martin
Prosiding Industrial Research Workshop and National Seminar Vol 14 No 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5366

Abstract

Air merupakan salah satu sumber daya alam yang sangat diperlukan oleh makhluk hidup. Namun, ketersediaan air saat ini menjadi perhatian khusus. Proses kondensasi dapat dimanfaatkan menjadi sumber air baru, melalui penggabungan titik-titik embun. Penelitian ini akan mengkaji secara langsung pendinginan yang dihasilkan oleh termoelektrik, untuk menghasilkan air. Disamping performansi, kapasitas pendinginan dan laju pengembunan juga akan diamati. Pengujian dilakukan melalui pengaturan kecepatan udara, tegangan kerja dan jumlah modul termoelektrik dengan total 16 variasi, masing-masing variasi dilakukan selama 2 jam. Hasil yang diperoleh pada pengkajian ini menjelaskan bahwa semakin besar kecepatan yang diatur dengan tegangan kerja lebih besar maka nilai kapasitas pendinginan, laju pegembunan akan semakin besar. Kapasitas pendinginan terbesar bernilai 0.00807 kJ/s, nilai laju pengembunan terbesar bernilai 0.00221 kg/s, terdapat pada variasi ke-16 dengan kecepatan udara yang digunakan 0.5 m/s. Nilai COP terbesar bernilai 1.87 pada variasi ke-1 dan COP terendah bernilai 0.58 pada variasi ke-4. Hasil eksperimen juga menunjukan bahwa kecepatan udara berbanding terbalik terhadap jumlah air yang dihasilkan. Jumlah air terbanyak terdapat pada variasi ke-8 sebanyak 12.2 ml/2jam dengan konsumsi energi listrik 100.1 watt, kecepatan udara sebesar 0.3 m/s. Dengan demikian, dapat ditarik kesimpulan bahwa termoeletrik dapat dimanfaatkan sebagai penghasil air baru melalui hasil pengujian yang telah ditunjukan.
Analisis Kenyamanan Berdasarkan Aspek Termal Pada Ruang Pamer Bangunan Bersejarah Oktantiningrum, Gita Almira; Surjanto, Ary; Prasetyo, Bowo Yuli; Hedi, Hedi
Prosiding Industrial Research Workshop and National Seminar Vol 14 No 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5374

Abstract

Museum Gedung Sate dan Museum Pos Indonesia merupakan destinasi sejarah yang berada di Kota Bandung, sehingga kenyamanan termal pada kedua museum perlu diperhatikan agar pengunjung merasa nyaman ketika berada di dalamnya. Tingkat kenyamanan termal di Museum Gedung Sate dan Museum Pos Indonesia dapat diketahui melalui SNI 03-6572-2001 dan standar ASHRAE 55 (2017). Data kuantitatif diperoleh dari pengukuran di lapangan dengan durasi 3 menit menggunakan alat 5 in 1 environment meter dan hot wire anemometer. Sementara data kualitatif diperoleh melalui penyebaran kuesioner. Hasil penelitian ini menunjukkan bahwa temperatur udara, kelembaban udara, dan kecepatan udara untuk kedua museum sudah memenuhi SNI 03-6572-2001, sehingga berdasarkan SNI kedua museum dikatakan nyaman. Namun, pada standar ASHRAE 55 (2017) kelembaban udara tidak terpenuhi. Nilai PMV yang terukur berkisar -1,61 hingga 0,48 dengan nilai PPD 5% hingga 57% untuk Museum Gedung Sate dan pada Museum Pos Indonesia nilai PMV berkisar -0,02 hingga 1,07 dengan nilai PPD 5% - 29%. Namun, pada Museum Gedung Sate nilai PPD yang melebihi 10% sebanyak 78% dengan hasil kuesioner hanya 12% responden merasa kurang nyaman. Sementara pada Museum Pos Indonesia indeks PPD yang melebihi 10% sebanyak 38% dengan hasil kuesioner menyatakan bahwa 34% responden merasa kurang nyaman.
Co-Authors Ade Suryatman Margana Afifah, Andini Luthfiyyah Akbar, Anas Aliansyah, Ridwan Angin, Ranufani Mahameru Timur Annisa, Poetri Noer AP. Edi Sukamto Apip Badarudin Arda Rahardja Lukitobudi Ary Surjanto Asep Hidayat Badarudin, Apip Darmawan, Gio Putra Dimas Alif Fadhil Fujen Wang Giovanni, Aldi Hedi, Hedi Hermawan Mitrakusuma, Windy Hidayatullah, Puguh Hiero, Frederick Ikhsan Sodikin, Rafi Juliawati, Lola KURNIASETIAWATI, ANNISA Luga Martin Simbolon Lukitobudi, Arda Rahardja M. Fasya Nur Harish Margana, Ade Suryatman Maulana, Akbar Mitrakusuma, Windy Hermawan Muhammad Akmal Muhammad Arman Muhammad Shiddiq Maulana Muliawan, Rizki Mutiara Nurul Azmi Nugraha, Yusup Hadian Nurhazizah, Meylinda Oktantiningrum, Gita Almira Padilla, Widya Putri Nur Parisya Premiera Rosulindo Prasetyo, Yosafat Dwi Ramdan, Arif Ranufani Mahameru Timur Angin Rosulindo, Parisya Premiera Simbolon, Luga Martin Sri Murniati, Sri Sumeru, Sumeru Tamba, Ivana Amelia Tresna, Agisnia Wang, Fujen Wardana, Muhammad Iqro Mahesa Wirenda Sekar Ayu