Article Per Year (5 Year)
p-Index From 2021 - 2026
1.203
P-Index
This Author published in this journals
All Journal Energy, Materials and Product Design
Made Wijana
University of Mataram

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
ANALISIS PENERAPAN KONSEP ERGONOMI UNTUK MENDESAIN MESIN POTONG KULIT KERANG MUTIARA I Wayan Joniarta; Made Wijana; I G.A.K. Chatur Adi W.A.; I Gede Bawa Susana; I Made Suartika
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The application of the concept of ergonomics is carried out on seashell craft work facilities because the work facilities used are not in accordance with the principles and norms of ergonomics feasibility. The research objective is the redesign of cutting machines and work chairs based on various kinds of information related to human factors which include designing tools and work facilities that are more effective, safe, comfortable, healthy, and efficient (ENASE). Some of the ergonomic parameters that are used as references include aspects of anthropometry, human physical performance, effectiveness-efficiency, work productivity, and the subjectivity of complaints of body pain as a result of inappropriate positions and workloads. In this study, 1 unit of circular model of shell cutting machine was designed and 1 unit of chair / seat. With anthropometric measurements of employees and through ergonomic calculations using the 5th percentile, the dimensions of the work table (cutting table) were obtained, the size of the table height was 87, 9 cm long table 110 cm and table width 64.3 cm. Then the dimensions of the chair are also obtained as follows: seat base height 32.7 cm Chair base length 70.6 cm Chair base width 32.1 cm chair back height 56.8 cm cm, seat back width 44.5 cm After applying the principles of ergonomics, based on the results of the Nordic Body Map questionnaire, it was found that the application of ergonomic principles to work tools for clam shell workers resulted in a 128% decrease in musculoskeletal complaints. In addition to this, it also resulted in a decrease in fatigue levels of 103%. . This shows that the application of ergonomic principles has a positive impact on employees
ANALISA PERFORMA HEAT EXCHANGER TIPE SHELL AND TUBE PADA PROSES PENDINGINAN PELUMAS SAG MILL DI AREA GRINDING CONCENTRATOR AREA 130 PT. AMMAN MINERAL NUSA TENGGARA I Wayan Joniarta; Wahyudi Santosa; Made Wijana
Energy, Materials and Product Design Vol. 2 No. 1 (2023): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the industrial world, the use of heat exchanger has an important role in helping the production process, especially in PT. Amman Mineral Nusa Tengggara. Heat exchanger which is used in various production process installations is basically a place to exchange energy in the from of heat from one fluid source to another. In the operation of a heat exchanger on a Semi Autogenous (SAG) mill this process is called oil conditioning, namely oil conditioning involving cooling and filtration in oil to coll the lubricant on the bearing SAG mill. This shell and tube type heat exchanger greatly influences the entire set of processes, because the operation caused by mechanical or operational failure can stop the operation of the unit. In this study do a comparison between the design specifications with the results of observations in the field in the morning and evening. Observations for 5 times were then analyzed using heat transfer to determine thermal load, heat transfer rate, heat transfer coefficient, LMTD, TDC. The results of these calculations can show that the heat exchanger in the morning has better performance. This is evident from its high effectiveness in the morning. However, the heat exchanger damages the leakage of the tube resulting in the mixing of oil with water and impurities from the cooling water quality from poor water flow can cause a decrease in performance on the heat exchanger.
ANALISIS EFISIENSI BOILER CFB UNIT 3 MENGGUNAKAN METODE LANGSUNG DI PT PLN INDONESIA POWER OMU JERANJANG I Wayan Joniarta; Rashid Ridho Al Buhori; Made Wijana
Energy, Materials and Product Design Vol. 3 No. 1 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A Boilers play an important role as steam power plants. A boiler is a closed vessel that is used to produce pressurized steam, where the resulting pressurized steam is used outside the boiler itself. This research aims to find out how to analyze the efficiency of CFB boilers. The analytical method used is the direct method. The results obtained show that the efficiency value of CFB boiler unit 3 of PLTU Jeranjang with a load of 25.8 MW, namely 73.17%, is quite low, this is caused by a lack of steam flow as a result of a leak in the upper boiler of PLTU Jeranjang unit 3, causing steam to come out of boiler and reduces its efficiency.
ANALISIS EFISIENSI POMPA SENTRIFUGAL PADA DESALINASI DENGAN PROSES REVERSE OSMOSIS: ANALYSIS OF CENTRIFUGAL PUMP EFFICIENCY IN DESALINATION WITH THE REVERSE OSMOSIS PROCESS I Wayan Joniarta; Ade Aprilian Dika; Made Wijana
Energy, Materials and Product Design Vol. 3 No. 2 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study provides information for the desalination industry in an effort to improve the performance and efficiency of desalination systems using the reverse osmosis method. By paying attention to the factors that influence the efficiency of centrifugal pumps, the provision of clean water in areas experiencing a water crisis will be better. Reverse Osmosis (RO) is a system in desalination technology that is often used to replenish fresh water supplies. RO performance depends on the quality of sea water as the raw water source. RO works by utilizing osmotic pressure. Hydrostatic pressure which is greater than osmotic pressure is used to reverse the flow, thereby producing fresh water. RO utilizes a high-pressure pump process to flow seawater through a membrane polymer structure. In RO there is a main membrane module configuration which has two functions, namely supporting the performance of the RO membrane and providing efficient fluid management. The desalination system used at PT Perusahaan Air Indonesia America (PAIA) still uses centrifugal pumps and can produce a production capacity of 600-700 m3/day, and is still in the system upgrade stage. From the calculations that have been carried out, the pump efficiency value is 59.16%.
PENGARUH VARIASI BENTUK BRIKET ARANG BIOMASSA BERBAHAN LIMBAH KAYU TERHADAP NILAI KALOR DAN BOILING TIME : THE EFFECT OF VARIATIONS IN THE SHAPE OF BIOMASS CHARCOAL BRIQUETTES MADE FROM WOOD WASTE ON CALORIFIC VALUE AND BOILING TIME I Wayan Joniarta; Zohimundin Usman; Made Wijana; I Kade Wiratama
Energy, Materials and Product Design Vol. 4 No. 1 (2025): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/empd.v4i1.6805

Abstract

Most Indonesian people currently use energy derived from fossil fuels, such as fuel oil, gas and coal. The impact of using fossil fuels is that it can damage the environment. Several alternative energy sources that are commonly developed are biomass energy. This biomass is usually processed into biochar which is a fuel with a high calorific value and can be used in everyday life. Briquettes are an energy source derived from biomass which can be used as alternative energy. In this study, briquettes were made from teak, acacia and mahogany wood waste. The method used is an experiment with the carbonization process using a modified composing drum. The independent variables used were briquette materials from teak, acacia and mahogany wood waste, variations in the shape of cube, cylindrical and hexagonal jerry cans. Tests include analysis of water content, calorific value, and changes in temperature. The results of this study showed that the best moisture content was obtained from cylindrical teak wood waste briquettes with an average value of 3.57%. Then for the calorific value, the best results were obtained from cylindrical teak wood waste briquettes with a value of 3457.0 Kkal/kg. and for temperature changes the best results were obtained on the cube-shaped mahogany wood waste briquette specimens with an average value of 10 minutes 46 seconds.
ANALISIS EFISIENSI ENERGI PADA PROSES PENGERINGAN GABAH MENGGUNAKAN DRYER GRAINPRO 30T-HS DI PT KARUNIA TRINITAS AGRO I Wayan Joniarta; Yoga Raditya Ananda Putra; Made Wijana; I Kade Wiratama
Energy, Materials and Product Design Vol. 4 No. 2 (2025): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/h62cpf76

Abstract

Rice is a key food commodity that plays a strategic role in maintaining national food security. One of the important stages in post-harvest processing is grain drying, as excessive moisture content can reduce rice quality and accelerate deterioration during storage. This study aims to analyze energy efficiency in the grain drying process using the GrainPro 30T-HS dryer at PT Karunia Trinitas Agro. The research method was conducted through direct observation with measurements of grain moisture content, drying temperature, process duration, husk fuel consumption, and electricity usage. The results showed that grain moisture decreased from 25.1% to 12.5% with a total mass of 23,000 kg. The drying process was carried out at 60 °C for 17 hours, with husk consumption of 1,500 kg and electrical power of 19 HP. Based on the calculation, the energy efficiency of the dryer reached 34.65%, which is relatively higher compared to other studies on biomass-fired batch dryers. This finding highlights that utilizing rice husks as fuel is not only economical but also environmentally friendly, thus the GrainPro 30T-HS can be recommended as an efficient drying system for industrial-scale applications..
Co-Authors Ade Aprilian Dika I G.A.K. Chatur Adi W.A. I Gede Bawa Susana I Kade Wiratama I Made Suartika I Wayan Joniarta I Wayan Joniarta Rashid Ridho Al Buhori Wahyudi Santosa Yoga Raditya Ananda Putra Zohimundin Usman