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All Journal AUSTENIT JTT (Jurnal Teknologi Terapan) Logic : Jurnal Rancang Bangun Dan Teknologi
Aa Setiawan
Politeknik Negeri Indramayu
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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KAJI EKSPERIMENTAL DEHUMIDIFIER PORTABLE BERBASIS TERMOELEKTRIK DENGAN VARIASI ARUS LISTRIK MASUKAN Yudhy Kurniawan; Aa Setiawan
Jurnal Teknologi Terapan Vol 1, No 1 (2015): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (918.764 KB) | DOI: 10.31884/jtt.v1i1.32

Abstract

Sebuah prototipe didesain untuk mendinginkan dan kemudian sekaligus mengeringkan atau disebut dehumidifier. Alat ini menggunakan termoelektrik sebagai komponen utama dalam dehumidifikasi. Hal ini mengingat alatnya relatif murah dengan daya yang kecil, portable, dan ramah lingkungan karena tanpa menggunakan refrigeran sebagai fluida kerja. Penelitian ini dibuat atas dasar permasalahan gudang penyimpan benih sayuran, dimana kelembaban belum dapat dikontrol dengan baik. Pengontrolan kelembaban sangat berpengaruh dalam memperpanjang umur tumbuh benih, sehingga para petani dapat menyimpan benihnya dalam waktu lama. Untuk benih sayuran dibutuhkan keadaan ruangan yang relatif dingin sekitar 20 oC dan kelembaban relatif (RH) berkisar 45% - 50%. Umumnya peralatan menggunakan refrigeran atau desiccant untuk proses dehumidifikasi penyimpan benih, sedangkan penggunaan termoelektrik belum pernah diaplikasikan pada gudang penyimpan benih sayuran.Alat ini bekerja dengan 2 tahap. Dimana udara lingkungan masuk melalui tahap 1 yang merupakan proses pendinginan yang disebarkan oleh heat sink dari pendinginan Peltier sehingga terjadi penurunan temperatur kemudian dengan adanya plat pengarah udara dingin dialirkan menuju tahap 2 yang merupakan proses pemanasan (kebalikan efek Peltier) dimana pada tahap ini udara dingin dikeringkan melalui heat sink sehingga terjadi penurunan kelembaban. Mengalirnya udara kering keluar system dibantu oleh fan axial. Dari kinerja system ini diharapkan terjadi proses dehumidifikasi yang diharapkan.
The Effect of Climate Engineering on Strawberry Plant Growth in the Lowlands Aa Setiawan; Ahmad Maulana Kartika; Wardika Wardika
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1233.483 KB) | DOI: 10.31884/jtt.v4i1.82

Abstract

This research aims to study the effect of climate engineering on the growth of strawberry plants in the lowlands. This research was conducted in greenhouse media of 6 m2 wide and 2 m high with roof cover and wall of ultraviolet plastic with roof damper using straw. Types of strawberry plants that will be used are varieties of strawberries (Alpine) Red and White Mixed. The planting medium of strawberries uses a polybag placed on the shelf. The analysis discussed in this research is the analysis of temperature and humidity attainment and growth and development of strawberries. Temperature and humidity attainment is indicated with fixed temperature and humidity data of 17 0C – 20 0C and 80% - 90% Rh under all conditions. Strawberry growth analysis is indicated by increasing stolon size while development is indicated by a change in fruit form.The results showed that the greenhouse room during the day only able to reach an average temperature of 22 0C and 70% moisture. While in the morning and afternoon greenhouse space is able to reach the temperature and humidity of strawberry habitat. Using temperatures and humidity under the design, strawberry plants are still alive and well developed which is indicated by the addition of stolon length, the appearance of new shoots, fruit ripening, and the addition of strawberries.
Freeze Dryer Machine Design for Mango Fruit Storage Wardika; Aa Setiawan; Sandi Rifqi Ridwansyah
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 1 (2022): March
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2287.794 KB) | DOI: 10.31940/logic.v22i1.62-69

Abstract

The purpose of the research on the design of this tool is to determine the cooling load on the freeze dryer and to determine the time it takes to reach a temperature of -20°C. This tool uses a vapor compression cooling system and a vacuum process means that this tool cools the storage space with air in the dry cabin. The research method is to determine the volume of the cabin to determine the capacity of the freeze dryer and determine the cooling load by calculating the product load and then calculating the heat load through the walls and other loads that generate heat. for a freeze dryer machine with a capacity of 1.8 PK. From testing the tool for 10 minutes once for 6 hours, the results of the system performance at the evaporator temperature -24.64°C and product temperature -16.2°C, COPCarnot performance of 3.77, and COPAktual of 2.87 with an efficiency of 76%, This is in line with the performance values ​​in the COPCarnot design of 3.8 and COPActual of 3.30 with an efficiency of 87%.
PENGARUH VARIASI TEKANAN SUCTION TERHADAP KINERJA AC MOBIL wardika; Aa Setiawan; Dedi Suwandi; Casinih .
AUSTENIT Vol. 14 No. 2 (2022): AUSTENIT 14022022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7265886

Abstract

A refrigerant is a functioning liquid that flows in the refrigeration cycle which causes a cooling effect on the refrigeration machine. This study aims to determine the impact of refrigerant suction pressure on the performance of car air conditioners. The refrigerant pressure in the refrigeration system can increase and decrease the performance of the A/C system. The test was carried out by varying the 3 refrigerant pressures, 10psi, 20psi, and 30psi on the Car AC trainer testing tool. Based on testing and data processing, the system efficiency performance at 10psi pressure is 81.26%, at 20psi pressure is 81.27% and at 30 psi pressure is 82.13% with actual COP of 6.98, 7.24, 7.36, and Carnot COP of 8.56 respectively. , 8.92, 8.95. Then the impact of changes due to pressure variations in the system on cabin temperature is 22.52℃, 23.01℃, and 23.45℃, respectively. Changes in refrigerant pressure in the car AC engine will affect system performance, where the more significant the suction pressure is given, the efficiency, and the COP value will increase as well as the compressor work and the cabin temperature will increase.
Co-Authors Ahmad Maulana Kartika Casinih . Dedi Suwandi Sandi Rifqi Ridwansyah wardika Wardika Yudhy Kurniawan