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Jurnal Inovasi Mesin
Published by Universitas Negeri Semarang
ISSN : -     EISSN : 27467694     DOI : https://doi.org/10.15294/jim
Core Subject : Engineering,
Mechanical Engineering
Jurnal Inovasi Mesin is a scientific journal published by Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang. This journal aims to accommodate a description of the development of science and technology and articles of research results in the field of Mechanical Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol 3 No 2 (2021): OKTOBER 2021" : 5 Documents clear
Pengaruh Kecepatan Angin terhadap Daya Keluaran Turbin Angin Tipe Hellical Savonius dengan 3 Sudu
Jurnal Inovasi Mesin Vol 3 No 2 (2021): OKTOBER 2021
Publisher : Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v3i2.52794

Abstract

This research aimed to find out the effect of wind speed on power output of savonius type wind turbine with 3 hellical blades. Variations of wind speed were obtained through a predetermined time and location of observation. The data collected consist of wind speed, voltage, electric current, RPM, and the power. The observation showed that wind speed affected the power turbine output. Time and location of the test that did not yield power output namely: at 09.00 am in the Marina Beach and at 12.00 pm in the GSG UNNES. The highest output power obtained at 06.00 pm in both areas. It was concluded that the wind speed in the morning and midday yield in lowest power output of turbine, while in the afternoon produce the highest power.
Pengaruh Saluran Inlet dan Outlet terhadap Thrust dan Kebisingan Mesin Valveless Pulse Jet
Jurnal Inovasi Mesin Vol 3 No 2 (2021): OKTOBER 2021
Publisher : Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v3i2.52795

Abstract

Unlike common jet engine that had numerous moving components, pulse jet has no moving component. The aim of this study is to examine thrust and noise of valve less pulse jet engine with a volume of combustion chamber 668.66 cm3 , inlet standard size 2.54 cm with a length of 35.56 cm and variations in standard size outlets 2.54 cm, 5.08 cm and 1.52 cm. with air and gas comparison 1: 1 to 1: 6. Basic theories include Cadency effects, acoustics and resonance elements, waves and currents and Lenoir cycles. The material used is stainless steel plate and pipe with a thickness of 0.08 cm. First gas and air fuel are injected in the combustion chamber, spark plugs ignited spark fire and the engine process produces thrust. The thrust on the jet engine occurs because there is a change in the momentum of the gas flowing through the engine. The standard engine produces the highest thrust and noise 0.491 N and 60 dB, variations I 0.588 N and 63 dB, as well as variations II 0.442 N and 60 dB. The variation I is the most perfect engine combustion and the lowest engine temperature.
Pengaruh Tekanan Kompaksi dan Perekat terhadap Karakteristik Briket Limbah Daun Cengkeh
Jurnal Inovasi Mesin Vol 3 No 2 (2021): OKTOBER 2021
Publisher : Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v3i2.52796

Abstract

Distillation process leave cloves leaf as waste that was burned as fuel. That means the leaf potential as solid fuel. This study aimed to determine the effect of compacting pressure and binder content on the characteristics of briquettes. Clove leaf waste was dried, then grinded and sieved through mesh 60. Briquetting is carried out at a pressure of 25kgf/cm2 and 50 kgf/cm2 with binder content varied from 10%, 15%, to 20%. Tests were conducted to get proximate composition (ash content, moisture content, volatile matters and fixed carbon), calorific value, density, stability, strength, and rate of combustion. The result showed that the treatments improved mainly the mechanical properties (density, stability, and strength). There was large change of volatile matter and fixed carbon value before and after briquetting but not for three variants of briquette. The calorific value decreased as binder content increased.
Pengaruh Variasi Kecepatan Sirkulasi Udara Terhadap Laju Pengeringan Kayu Pada Dapur Pengering Kayu Karnowo, Karnowo; Al Janan, Dony Hidayat; Widayat, Widi
Jurnal Inovasi Mesin Vol 3 No 2 (2021): OKTOBER 2021
Publisher : Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v3i2.52797

Abstract

The aim of this research is to investigate the effect of air circulation speed variations on the rate of wood drying in the wood drying kiln. The research was carried out by installing an exhaust fan at the end of the chimney exiting the oven. The speed of the exhaust fan can be varied. Variations in circulation speed are set from 1 m/s to 8 m/s. The temperature and RH in the oven at each drying stage are maintained stable. The results obtained from the research are as follows. The sample drying rate with four pieces of mahogany wood was found to be an average of 16.6% per hour for all variations. At the greatest speed variation Vcirculation = 8 m/s, the target final moisture content (MC) reaches 4.17%, and at Vcirculation = 1 m/s (lowest), the final MC is 7.67%. So the higher the circulation speed, the greater the drying rate. However, at high circulation speeds, physical damage to the wood will occur, namely cracks on the face and ends of the wood.
Analisis Aliran Udara Pada Ruang Pengering Low Temperature Dryer Dengan Simulasi CFD
Jurnal Inovasi Mesin Vol 3 No 2 (2021): OKTOBER 2021
Publisher : Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v3i2.52798

Abstract

Food drying technology in maintaining food quality has become an attraction for the food industry. Low temperature drying was the option for drying food while maintaining the nutritional value of food remain intact. The purpose of this study was to determine the air and temperature distribution that occurred in the drying chamber using Computational Fluid Dynamic (CFD) simulations. Geometry of the drying chamber has been done previously in 3D design drawings using software. Various parameters for simulation have been used. The result showed air flowed unevenly in some shelves of drying chamber so that some adjustments were made to the geometry of the drying chamber. After several changes, the geometry of drying chamber could distribute air and heat flow evenly. The air flow into the drying chamber at 2 m/s dropped to 1 m/s upto 1,2 m/s when flow on the drying rack. While the initial air temperature of 50oC was distributed evenly on a drying rack with temperatures ranging from 45oC to 50oC.

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