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ANALISA KELAYAKAN BEJANA BERTEKANAN TIPE VERTIKAL DENGAN MENGGUNAKAN SIMULASI AUTODESK INVENTOR I G.N.K. Yudhyadi; Tri Rachmanto; I Made Suartika; Made Wijana; Fahrurrozi
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The minimum thickness of vertical type pressure vessel of column type distillation, must be planned in accordance with the recommended code of ASME (The American Society of Mechanical Engineering) VIII Div 1. Based on this code, the study aims to determine the feasibility of a pressure vessel that used by PT Pertamina (Persero). For this reason, and to be able to use this ASME code, various data was needed, especially the data sheets and some required data from the field. Based on the data that has been collected, it is then processed and was made a 3D modeling and was simulated using Autodesk Inventor software to test its feasibility. Based on the results of the study, the minimum thickness was obtained, namely head 13.66 mm, shell 13.69 mm, and skirt 3.47 mm, respectively. Taking into account the availability of materials on the market, namely SA-516 Grade 70, the recommended thickness of the head and shell sections was 14 and 5 mm, respectively. From the results of the safety analysis, it was found that at the stress of 0.217, 0.197, 0.196, and 0.195 MPa, the Von Mises stress that occurred ware 0.249; 0.226, 0.225 and 0.224 MPa. From these data, based on the distortion energy failure theory, the head and shell materials which have yield strength of 260 MPa can be categorized as very safe because it does not exceed the yield strength of the material used.
EVALUATION OF WASTE FACILITY NEEDS BASED ON THE EXISTING POSITION AND THE AMOUNT OF WASTE VOLUME IN JEMPONG BARU-MATARAM VILLAGE Made Wijana; I Made Suartika; I Wayan Joniarta
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

An increase in the volume of waste if it is not accompanied by good management, will certainly have a bad impact on reducing the quality of the environment. In Jempong Baru village which has a population of 17,172 people, but currently only has 1 TPS located in the east Jempong neighborhood which has an area of 36 m3 with a capacity of 72 m3 and 1 damtruck with a capacity of 7 m3, which should be insufficient facilities, but in fact there is no garbage overflowing out of the TPS. For this reason, it is necessary to further study the current real condition (existing position) compared to the condition if all villages dispose of waste at the TPS in the environment of the research site (alternative position), in terms of the size of the volume of waste and the number of minimal waste facilities needed. The result of this study is that a dumptruck with a capacity of 7 m3 is able to transport waste from the TPS to the landfill, which is as much as 3 times / day (3 irritations). The total amount of waste generated in Jempong Baru Village in the existing position is 28.97 m3 / day and in the alternative position of 121.47 m3 / day. In the existing position, 1 TPS with a capacity of 72 m3 and 1 dumptruck with a capacity of 21m3 / day are sufficient. Meanwhile, in the alternative position, the facilities needed to handle the volume of waste as much as 121.47 m3 / day are at least 1 TPS and 6 dumptrucks
ANALISA SISTEM KENDALI MEKANIK UNTUK PENGEMBANGAN KENDARAAN LISTRIK AUTONOMOUS FAKULTAS TEKNIK UNRAM I Dewa Ketut Okariawan; Syahrul; Ida Bagus Alit; I Made Nuarsa; I Made Suartika
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Currently, the vehicles that are commonly used are vehicles with fossil fuels, but we all know that these fuels are non-renewable fuels and their availability in nature is very limited, so it is necessary to innovate to use other renewable energy sources. one of which is electrical energy. Besides that, the use of electrical energy for vehicles is currently very relevant because of its relatively high efficiency and friendly to the environment, namely no CO or CO2 gas is formed as in conventional vehicles. Indonesia has the potential to develop electric cars because there is a lot of nickel available to be processed into batteries. Thus, our country has a very large opportunity to produce electric cars. To realize this, it is deemed necessary to conduct a thorough study such as the level of comfort and safety. Thus, it is needed to conduct a study of the mechanical control system so that driving comfort and safety can be achieved. In this research, we will measure the turning radius of the vehicle at various TOE angles. The resulth of this study are the greater of TOE angle produce the higer the turning radius of the vehicle, The smallest turning radius is at a TOE angle 0 degrees which is 4.42 meters and the largest at a TOE angle 1.035 degrees which is 4.53 meters.
PENGARUH FILTER AKTIF TERHADAP LOSSES TRANSFORMATOR DI FAKULTAS TEKNIK UNIVERSITAS UDAYANA BUKIT JIMBARAN DENGAN FUZZY LOGIC CONTROLLER MENGGUNAKAN SIMULINK I Kadek Indra Jana Martana; I Wayana Arta Wijaya; I Made Suartika
Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i01.p10

Abstract

Harmonics in the electrical system can have a negative impact on the quality of the electrical energy being distributed. Harmonics are phenomena that arise due to the operation of non-linear electrical loads. Thus causing the formation of waves with a frequency that is different from the fundamental frequency. Total harmonic distortion (THD) is the effective value of waves affected by harmonics so that they can affect power losses. This study analyzes the power losses in the KA4214 transformer at the Faculty of Engineering, Udayana University, Bukit Jimbaran. The method used is to carry out simulations and analysis of the results of harmonic measurements carried out in existing conditions using active filters, and using active filters with fuzzy logic controllers and then compared with IEEE 519-2014 standards. The simulation results from using an active filter with a fuzzy logic controller obtained the smallest current THD value of each phase, namely R = 0.28%, S = 0.71% and T = 0.72% with the resulting power losses of 0.0009905 kW.
RANCANG BANGUN SISTEM KONTROL DAN MONITORING SUHU PADA RUANG FREEZER BERBASIS ESP8266 (STUDI KASUS PADA PT. AEROFOOD ACS DENPASAR) Komang Dody Pramudya Indra Jaya; I Gede Dyana Arjana; I Made Suartika
Jurnal SPEKTRUM Vol 10 No 2 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i02.p10

Abstract

The temperature control and monitoring system in the freezer room has an important role in maintaining the quality of food raw materials. Freezer space is used to store food raw materials to keep them fresh and undamaged. However, if the temperature in the freezer compartment is not properly monitored, food raw materials may be damaged which can affect their quality and safety. Therefore, an IoT-based temperature control and monitoring system in the freezer room was created using Wemos D1 R2. The design of this prototype uses hardware, namely the WeMos D1 R2 microcontroller based on ESP8266 because it can be connected to WiFi, DHT22 temperature sensor, I2C LCD and relay. The results of this prototype design are being able to read the temperature and humidity of the freezer room and having a temperature control system that can be seen on the Blynk application on a smartphone by displaying the temperature and humidity values. The conclusion from this study is that the prototype has succeeded in controlling the temperature of the freezer room as well as monitoring the temperature and humidity of the freezer room and displaying it on the Blynk application on a smartphone and has a warning notification when the temperature rises above -18 degrees celsius.
STUDY PENGEREMEN PADA MOBIL LISTRIK HASIL MODIFIKASI A.A. Alit Triadi; Achmad Zainuri; I Made Suartika; I Made Adi Sayoga; I Made Mara; I Dewa Ketut Okariawan
Energy, Materials and Product Design Vol. 3 No. 1 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Every three accidents occur every hour in Indonesia, according to the Director of Road Traffic at the Ministry of Land Transportation, with a percentage of over 50-70 percent and 30 percent of accidents occur due to poor performance of the brake system. Accidents occur due to insufficient braking distance and lack of understanding of the braking characteristics of the vehicle being driven. The aim of this research is to analyze the distance, time and braking force required for an electric car to move until it stops with variations in speed and vehicle load. This research was carried out using an experimental method where a prototype electric car was run by varying the speed and load of the vehicle to obtain braking time and distance and analyzing the data obtained. The shortest braking distance at a speed of 20 km/hour with a vehicle load of 950 kg is 4.39 meters. The longest braking distance is 14.78 meters at a speed of 40 km/hour with a vehicle load of 1050kg. The fastest braking time is at a speed of 20 km/hour with a vehicle load of 950 kg, namely 1.97 seconds. The longest braking time was at a speed of 40 km/h with a vehicle load of 1050 kg, namely 2.76 seconds. The smallest braking force is at a speed of 20 km/hour with a vehicle load of 1050 kg, namely 2098.36 N. The largest braking force is at a speed of 40 km/hour with a vehicle load of 950 kg, namely 4132.65 N.
An Analysis of Assertive Speech Act in Donald Trump Inauguration 2025 Speech in YouTube I Made Suartika; Ida Ayu Putri Gita Ardiantari
IDEAS: Journal on English Language Teaching and Learning, Linguistics and Literature Vol. 13 No. 2 (2025): IDEAS: Journal on English Language Teaching and Learning, Linguistics and Lite
Publisher : Universitas Islam Negeri Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24256/ideas.v13i2.7906

Abstract

This study aims to identify and explain the types and functions of assertive speech acts used in Donald Trump’s 2025 inauguration speech. The data were taken from a video entitled “Donald Trump Inauguration Speech 2025” uploaded on the official CNN YouTube Channel (accessed on February 5, 2025, with a duration of 23 minutes and 14 seconds, and 5.8 million views at the time of analysis). This research employs a qualitative descriptive approach, referring to Searle’s (1979) theory of illocutionary speech acts. The findings show that out of 56 assertive utterances, there are five types of assertive speech acts: claiming (25%), stating (21.43%), complaining (19.64%), reporting (17.86%), and explaining (16.07%). The claiming type was the most frequently used, indicating that Trump often emphasized his beliefs and evaluations of the political situation to strengthen his message and shape the audience’s perception. This study expands the application of speech act theory in political contexts and provides insight into how language is strategically used to build legitimacy, trust, and a leader’s image.