Claim Missing Document
Check
Articles

Found 2 Documents
Search

Design of Low Flow Undershot Type Water Turbine E. Y. Setyawan; S. Djiwo; D. H. Praswanto; P Suwandono; P. Siagian
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 2, No 2 (2019): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.043 KB) | DOI: 10.31328/jsae.v2i2.1184

Abstract

Many water sources around us which have kinetic energy to run waterwheels are not optimally utilized. This energy can be converted into an energy source that can produce electricity. Therefore this study produced a design of a waterwheel that could be used in low-flow rivers to produce electricity by adding generators. Waterwheel modeling using Ansys is calculated based on flow assumptions. Modeling using this system provides advantages in the form of computational power efficiency, the stability of numerical calculations and the accuracy of the resulting solutions. Numerical analysis of the waterwheel is assumed that the waterwheel is half floating on the surface of the water. As stated in the limitation of the problem that the incoming water flowing at a speed of 5 m/s from the flow moves the wheel. The flow rate of water that hit the blade on the waterwheel causes the waterwheel to rotate which is pressured by the flow of water with a number of 12 blades. With a relatively simple design, the waterwheel produces a wheel rotation I of 91 Rpm and II of 78 Rpm, with a torque of 39.2 N by using some analysis of this design can be applied to river flow with low flow velocity. The relatively simple design makes it easy to be produced and maintenance. River flow used is in the Malang District with a flow velocity of 1 m/s gets a power of 1128 W on waterwheel I while on waterwheel II gets a power of 967 W.
Mixed Characteristics of Activated Charcoal Ori Bamboo and Red Ginger as Air Purifier on Food Cabinets S. Astuti; F. E. K. Rastini; E. Priskasari; D. H. Praswanto
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 4, No 2 (2021): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v4i2.3117

Abstract

Most of the community while preservation of food using refrigeration machines and chemicals, which less attention to hygiene. The storage space made of wood, glass or plastic where are almost airtight except the refrigerators which have poor air circulation and it cause of cross-contamination and also triggers bacteria growth, virus and fungi that cause decay and also disease source. These problems encourage the researchers to make a hygienic food storage space by consider the air circulation which is given an air purifier natural ingredients combinations that absorb pollutants, heavy metals, and anti-microbials. The air purifier ingredients which expected are original bamboo charcoal active, and red ginger. To make the air purifier can work effectively, a certain balanced composition is needed. The research method used is an experimental method where food ingredients are stored in a space where the air circulation is coated with a particle layer of original bamboo charcoal activate and red ginger rhizome with different compositions. The material used are mixture of charcoal and ginger rhizome by making an air purifier derived from activated charcoal from ori bamboo waste at a certain percentage of charcoal maturity. After that the product will be tested in food storage space with tofu for the food sample. In this research, the composition combination of ori bamboo charcoal active with red ginger extract was 4:0, 3:1, 2:2, 1;3, 0:4 where the ori bamboo charcoal active was used with a maturity percentage of 50%, 75%, 100 %. From the results of the research, it was found that the samples stored without using the filter grew with microbes after the second day, the samples that were filtered with the composition of activated charcoal only grew microbes on the third day and there was a change in the shape of the filter, namely the aqueous filter. Samples with a composition of activated charcoal with varying maturity and ginger extract began to grow with microbes after the fourth day. The best filter results using 100% mature activated charcoal with a composition of activated charcoal and ginger extract, which is 2:2. Microbes that can still grow in that composition are Bacillus substilis but in small quantities and no viruses or other microbes are found.