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All Journal IPTEK The Journal for Technology and Science Journal of Science and Applicative Technology Infotekmesin Journal of Mechanical Engineering Jurnal Abdi Masyarakat Indonesia Andalas Journal of Electrical and Electronic Engineering Technology Jurnal Pengabdian Pada Masyarakat Journal of Sciencce Technology and Visual Culture
Putty Yunesti
Department Energy System Engineering, Institut Teknologi Sumatera, South Lampung, Lampung
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Journal : journal of science and applicative technology

 1 
Desain Turbin Angin Horisontal untuk Area Kecepatan Angin Rendah dengan Airfoil S826 Setiadi Wira Buana; Putty Yunesti; Guna Bangun Persada; Abdul Muhyi
Journal of Science and Applicative Technology Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v4i2.272

Abstract

This research aims to determine performance of turbine rotor performance with a single rotor blade model with a diameter of 0.6 m that has been developed by NORCOWE, while for turbine rotor blades used is the NREL S826 airfoil series. The wind turbines are operated at wind speed intervals of 1-5 m / s. This parameter will also present data in the form of the optimal point of wind turbine rotation and rotor rotation speed. The pitch angles used are 25 °, 30 °, and 35 °. The pitch angle that affects the value of the ideal rotational speed with the highest optimization for the horizontal airfoil turbine S826 is 30 ° with a wind speed of 5 m / s and a rotation of 570 RPM. This is because the greater the pitch angle of the installation, the easier it will be to experience speed trimming but is vulnerable to too large an angle of attack that causes a stall.
Study of Thermoelectric Generator Utilization to Recover Heat at Low Temperature Grade Application: A Review Rihardian Maulana Wicaksono; Putty Yunesti
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.430

Abstract

Generally, the supply of heat energy is abundant in this world especially from direct solar radiation or combustion process activity. However, this energy is mostly wasted and discharged to the environment without recovery and re-utilization process. There is a potential utilization this heat to be converted to electricity using thermoelectric generator (TEGs). This technology device has an ability to convert heat to electricity by difference temperature from both surfaces. This device could prevent thermal loss to environment and optimize the system to generate electricity for small and micro scale power generation. This research conducts a literature review about identifying several potential object application or equipment as heat sources from solar energy or combustion activity combine with thermoelectric generator at low grade temperature that has been worked by previous researcher for past 5 years. Current status and working principal of thermoelectric generator is presented briefly. Several parameters such as working temperature range, potential output power, and efficiency system are described and presented. Then, some implementation challenge and opportunity development combination TEGs with each object applications are discussed and analyzed to produce recommendation for further research
Perancangan Bidai Infus Untuk Anak Usia Sekolah Putty Yunesti; Andi Rahadiyan Wijaya; I Gusti Bagus Budi Dharma; Fajar Paundra
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.451

Abstract

This research designed a hand infusion splint for school-age children with an age range of 7-12 years according to the anthropometry and contours of the child's hand so that children who underwent infusion on the hand did not experience medical complications during treatment or post-hospital trauma. The method used in the design of infusion splint for school-age children is Quality Function Deployment (QFD) and House of Quality (HOQ) to get design criteria according to consumer needs, while the software used, namely SPSS and Autodesk Professional Inventor to build models. The size of the infusion splint was determined based on the hand anthropometry of school-age children. The specifications of the hand infusion splint of school-age children according to the needs of pediatric patients have a length of 189 mm, a thickness of 9 mm, and a width of 46.3 mm for arm supports, and 37.1 mm for hand supports obtained from the highest priority value in the House of Quality, namely the design of the dimensions of the splint.
Pengaruh Temperatur, Komposisi Bahan Cangkang Inti Kelapa Sawit dan Konsentrasi Perekat pada Karakteristik Briket Komersial dari Tempurung Kelapa Sawit Guna Bangun Persada; Putty Yunesti
Journal of Science and Applicative Technology Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v4i2.268

Abstract

Briquettes are an essential product for metal mineral processing plants in Indonesia. One good alternative raw materials for briquettes that do not pollute the environment is the palm kernel shell. This research was conducted by making briquettes from palm kernel shells to find optimal variations in carbonization temperature, material mixture, and adhesive mixture. The research was conducted on a laboratory scale. The palm kernel shell and coal kernel were carbonized at various temperatures, namely 450°C, 550°C, and 650°C, then crushed and sieved to 35 mesh. The powdered palm kernel shell and coal that have become powdered charcoal are weighted based on a mixture of powder and the adhesive composition ratio of 40 g. After that, the briquettes were formed under a pressure of 100 kg/cm² on a cylindrical mold with 40 mm. The analyzes carried out were moisture content, ash content, volatile substances content, fixed carbon content, calorific value, compressive strength, density, porosity, and SEM (Scanning Electron Microscope). The results showed that the briquette from the kernel of the palm kernel shell was optimal at a temperature of 550 ° C with a starch adhesive mixture of 7.5%, a pressure of 100 kg/cm², moisture content of 5.34%, an ash content of 5.81%, a substance content. Volatile amounted to 18.77%, 71.08% for fixed carbon, heating value 7125.86 cal/g. Density of 0.78, porosity of 0.04 and strength of 72.56 kg / cm².
Co-Authors Abdul Muhyi Afit Miranto Alfajar Puja Kusuma Ali Muhtar Amrina Mustaqim Andi Rahadiyan Wijaya Arirohman, Ilham Dwi Buana, Setiadi Wira Devy Arysandi Eko Pujiyulianto Fajar Paundra Fajar Paundra Gde KM Atmajaya Guna Bangun Persada Guna Bangun Persada Guna Bangun Persada Haogqea Dhiyah Ayu Harahap, Al Barra I Gusti Bagus Budi Dharma Madi Madi Muhammad Rizky Hikmatullah Nurdin, Akhmad Pinto Anugrah Praseptiawan, Mugi Rahmat Ramadhan Wahab Rihardian Maulana Wicaksono Rihardian Maulana Wicaksono Risfihan Rafi Rishal Asri Sabhan Kanata Syamsyarief Baqaruzi Yulianti Fatmawati