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Prasetyo, Bowo Yuli
Jurusan Teknik Refrigerasi Dan Tata Udara, Politeknik Negeri Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Journal : International Journal of Applied Technology Research

 1 
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.
Numerical Study of Thermal Comfort Evaluation in Naturally Ventilated Classrooms Prasetyo, Bowo Yuli; Muliawan, Rizki; Afifah, Andini Luthfiyyah; Wang, Fujen
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.v4i2.131

Abstract

The classroom is one of the important facilities in teaching and learning activities. Just like any other room, ensuring thermal comfort becomes a vital aspect for its occupants. This study aims to evaluate environmental conditions and the thermal comfort experienced by classroom occupants through numerical methods. The evaluation involves the integration of the Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD) equations into Computational Fluid Dynamics (CFD) simulations using a user-defined function. Furthermore, extensive field measurements and questionnaire surveys are also employed to support the simulation process. The results indicate that the air temperature tends to be high, reaching 30.91°C. Meanwhile, the air velocity within the room, particularly in the occupied areas, is significantly low, with an average value of 0.04 m/s. According to the ASHRAE Standard 55, the classroom is perceived as uncomfortable, as evidenced by a PMV value of 1.38 and a PPD of 44.94%. Therefore, efforts are required to enhance the thermal comfort in the space.
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