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JOURNAL OF SCIENCE AND APPLIED ENGINEERING
Published by Universitas Widyagama
ISSN : 26213753     EISSN : 26213745     DOI : -
Core Subject : Science, Education, Social, Engineering,
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Social Sciences Other
ournal of Science and Applied Engineering (JSAE) is an open access peer-review journal, and is aimed to disseminate original research in all fields of Electrical Engineering, Mechanical Engineering, Civil Engineering, Industrial Engineering and Informatics Engineering and presents the latest development and achievements in scientific research in Indonesia and overseas to the world’s community. Only original, innovative and novel papers will be considered for publication in the JSAE. The authors are required to confirm that their paper has not been submitted to any other journal in English or any other language. The JSAE welcome contributions from all who wishes to report on new developments and latest findings in science and applied engineering.
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Articles 7 Documents
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Search results for , issue "Vol 5, No 2 (2022): JSAE" : 7 Documents clear
Analysis of the Cross Section Planning of Jepara’s Secondary Channels in Serayu Irrigation Area of Sumpiuh Irrigation Channels Cilacap Central Java Prima Safitri Ayundaningtyas; Abdul Halim; Riman Riman
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4039

Abstract

Central Java is one of the provinces in Indonesia that relies on the agricultural sector. The agricultural centre in the province is located in Cilacap regency. In order to improve agricultural products, adequate facilities and infrastructure are required, one of which is the Jepara Secondary Channel. Channels on the Secondary Channel Jepara majority is no longer worth using. So much agricultural land is less maximal in water utilization. On the Jepara secondary channel, there is no similar cross-section of channels; some use a cross-section of soil, stone, and concrete, and there is cross-sectional damage.  In connection with the problem, a cross-sectional planning analysis of secondary channels needs to be conducted. Consider effective rainfall analysis, irrigation needs analysis, and open hydraulic analysis. The results obtained from the analysis should indicate that the discharge flowed by the existing channel (Qs) must be greater than or equal to the planned discharge (Q0). Based on the results, two channels cannot accommodate the discharge of water needs (Q0), namely in section 1 and section 6, so it needs to be redesigned. However, by analyzing cross sections along channels with a varied cross-section shapes. Then planned design for all fields by using alternative four. This is because using a cross-sectional combination of trapezoid and u-ditch 70x80 cm can shorten working time and make construction costs more affordable.
Investigation of Silica (SiO2) Nano Materials for Increasing Performance of Vehicle Radiator Cooling Systems Arif Surono; Wachid Yahya; Adnan Nur Avif
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4054

Abstract

This study aims to evaluate the effect of fluid flow rate on the effectiveness of radiator performance by using nanofluid consisting of a mixture of raw water with nano silica (SiO2) particles. The research was initiated by testing the silica material morphologically using a Scanning Electron Microscope (SEM) with the aim of knowing its microstructure. Next, mix the silica nanoparticles (SiO2) with water using a ratio of 0.5%, processed using a magnetic stirrer for 8 hours and precipitated for 24 hours. After being separated from the sediment, the nanofluid was tested for performance using a series of cooling system performance test equipment. A series of test equipment consisting of a radiator, flowmeter, water pump, pipe installation, heater and reservoir tank. Research data collection was carried out at the inlet and outlet temperatures as well as the radiator wall. In this study, variations in fluid flow velocity of 2.5, 4.5, and 6 LPM were carried out. The results showed that the decrease in temperature with the use of a fluid flow rate of 6 LPM was able to dissipate heat well to the environment. The decrease in temperature that occurs is 2.5%. Meanwhile, the lowest average radiator effectiveness value at the lowest speed of 6 LPM is 0.905, the highest at a fluid flow rate of 4.5 is 0.930.
The Implementation of Online Practicum Classes During the Covid-19 Pandemic at Sampoerna University Indra Pertama Putra; Ifat Ifat; Kushendarsyah Saptaji; Aditiya Harjon; Yheni Mulyaningsih
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4071

Abstract

The unprecedented Covid-19 pandemic has altered the way educational institutions operate, including Sampoerna University. Distanced learning has been commonly implemented since then. Not only for taught classes but laboratories or practical activities, such as Mechanics of Materials and Machine Shop have also been organized virtually for the undergraduate student in the mechanical engineering study program. Two stages of activities were carried out during the conduct, namely the (1) preparatory stage, where all the teaching materials in the form of videos were prepared, and (2) virtual lab. At the end of the semester, the participating students were asked to fill out a questionnaire to evaluate the entire practicum process. The results revealed that, according to students, teaching and learning activities performed in such a way are quite effective and satisfying. Regardless, based on the survey result, the students expect to have practical activities conducted in person to gain hands-on experience.
Analysis of the Effect of Intake Manifold Shape on Motorcycle Engine Performance Santoso Santoso; Reyhan Abiyyuzufar Prayitno
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4038

Abstract

The intake manifold is a vehicle component where air and fuel flow from the carburetor to the combustion chamber through the intake valve. In order to get turbulent flow, it is necessary to modify the intake manifold. This research method uses data collection techniques using observation. Torque, power, fuel consumption, and exhaust emissions for each use of the intake manifold modification were tested three times at engine cycles of 2500-9000 rpm. In this study, the data were obtained from independent variables affecting dependent variation. The independent variable in this study was the shape of the intake manifold with a distance of 1 cm, 2 cm, and 3 cm. The dependent variable results from the independent variables are torque, power, fuel consumption, and exhaust emissions. It is necessary to control variables, including motorcycles according to the manufacturer specifications, testing engine performance using a 4-stroke transmission gear, engine working temperature (80-90 oC), and 92 octane fuel. 2 cm has the most significant impact on power, which is 5.47 HP. In testing the shape of the intake manifold, the threaded distance of 3 cm has the most significant impact on Torque, which is 7.15 Nm. In testing the shape of the intake manifold, which has an efficient impact on fuel consumption on a thread distance of 2 cm at 3000 rpm engine cycle with a time duration of 155.33 seconds. The peak engine cycle at 8000 rpm is the most economical on a 3 cm wine thread, with 71.67 seconds. The results of exhaust gas emissions for Hydrocarbon (HC) that are not burned out in the combustion process of the motor are the lowest, namely at a thread distance of 1 cm with an engine cycle of 2000 rpm with a result of 263.33 ppm, for engine cycle 9000 rpm with a yield of 246 ppm. For levels of Carbon Monoxide (CO), which is incomplete combustion in the process of engine performance, the lowest is at a 2 cm threaded distance at a 2000 rpm engine cycle with a result of 2.22%, and for an engine cycle of 9000 rpm with a result of 0.23%.
Determining In-situ Frequency Independent Attenuation and Complex Modulus of Pavement Materials using Wavelet Power Density of Vibration Method Sri Atmaja P. Rosyidi
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4074

Abstract

The features of vibration sources, site characteristics, the propagation of surface and body waves in the ground, and the reaction of structures are all important to consider when analyzing vibration-related issues, including those caused by traffic loading. Pavement vibration analysis can be used to determine the impact of damaging vibrations on the road and surrounding buildings or structures. Furthermore, this vibration can be utilized to calculate the dynamic properties of road pavement materials, such as the attenuation factor and damping ratio of the material, as well as the complex modulus of the pavement material. To minimize vibration damage, an environmental zone that is effective in reducing ground vibration amplitude is frequently used. However, estimating the degree of decrease in vibration amplitude at a given distance is challenging. In general, vibration attenuation with distance is made up of two components: geometric damping and material damping. Geometric damping is related to the qualities of the ground and the magnitude of the vibration, while material damping is dependent on the nature of the source of the vibration. The majority of ground vibrations are now monitored mainly at the ground surface, rather than in deep layers, and propagation patterns are not properly considered. The wavelet power density of vibration technique was used in this study to quantify the frequency-dependent attenuation of geometric damping at a variety of pavement structures in Malaysia and Indonesia. At each location, the energy in a seismic wave signal was calculated as a function of the Gaussian of the derivative wavelet in signal amplitude. The vibration source's propagating waves were described by examining the recorded particle motions and significant energy components in the time-frequency domain. The complex modulus of pavement materials was then calculated using the frequency-dependent attenuation factors. The results reveal that the wavelet power density of vibration method can properly define the physical properties of the dynamic pavement material, such as attenuation frequency, damping ratio, and complex pavement modulus. This approach has the advantages of being quick, cost-effective, and nondestructive.
The Effect of Bioethanol and Pertamax Mixtures on Exhaust Gas Emissions from a 4-Stroke Engine in Motorcycle Matic Listiyono Listiyono; Muhammad Afif Bahrain; Eko Yudiyanto
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4037

Abstract

Bioethanol is an alternative fuel to substitute fossil oil. Bioethanol has several advantages in its use as a fuel in addition to its renewable nature, and bioethanol is also believed to reduce some motor vehicle emissions. The purpose and objective of this study were to determine the effect of a mixture of Bioethanol and Pertamax on gas emissions in a 4-stroke motor with variations in the fuel mixture and engine cycle. This test method is carried out with the measurement parameters of CO, HC, CO2, and O2. Tests on motor vehicles were carried out with variations of BP0 (0% Bioethanol) to BP100 (100% Bioethanol). The test results using a gas analyzer and analyzed using excel show that bioethanol cannot reduce exhaust gas emissions. Adding bioethanol fuel to Pertamax can also increase the fuel's octane number (RON) and specific gravity. From the available data, adding bioethanol can reduce HC emission levels by up to 4ppm at BP50 at 6000 rpm, increasing CO2 emissions by 13.4% at BP50 at 7000 rpm with a compression ratio of 13:1. For the lowest O2 emission level, it reaches 0.13%. at BP40 at 5000 rpm. CO emission levels are still relatively small in various mixtures with a yield of 0.01%, but at BP0 and BP80 at 13:1 compression, emissions tend to increase every rpm.
Effect of Velocity and Type of Cooling Fluid on Peltier Heat Transfer for Car Cabin Cooling Applications Eko Yudiyanto; Ridho Surya Setiabudi; Agus Hardjito; Satworo Adiwidodo; Bayu Pranoto
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 5, No 2 (2022): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v5i2.4036

Abstract

This research used the Peltier element as a car cabin cooler. This research aimed to compare the results of the lowest temperature produced by the Peltier element on the hot side. The design of this monitoring tool consists of LM35 as a temperature sensor and an electric velocity sensor to measure the velocity of the cooling fluid. Arduino Uno Microcontroller to control the system before being displayed to the LCD. The type of research used in this research is experimental research. In this study, variations in fluid flow velocity and type of cooling fluid were carried out. The fluid used is a mixture of water and water coolant with a ratio of 50%:50%. The results showed that the circulation of fluid cooling influences the temperature on the hot side of the Peltier. In cooling using water fluid, when the water pump rotates 4.5 liters/second, the temperature on the hot side of the Peltier is 36ᵒC. At the time of rotation of 13 liters/second, the temperature on the hot side of the Peltier is 32ᵒC. The difference between cooling using water fluid, water coolant, or a mixture of water and water coolant greatly affects the temperature produced on the cold side of the Peltier. In cooling using water, the lowest temperature produced reaches 8ᵒC. When the cooling using a fluid coolant, the lowest temperature reaches 6ᵒC. While cooling using a mixture of water and coolant, the lowest temperature reaches 3ᵒC. So it can be concluded that cooling using a mixture of water and water coolant is very effective compared to other fluid coolers.

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