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Tugur Redationo, Nereus
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Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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COMPARISON OF PARTICLES SIZE AND PRESSURE OF COCONUT SHELL CHARCOAL BRICKETS ON COMBUSTION TIME AND TEMPERATURE Mali, Alfin; Crisanto Putra Mbulu, Bernardus; Tugur Redationo, Nereus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.97

Abstract

Briquettes are a type of alternative energy whose raw material source comes from agricultural waste such as coconut shells. Coconut shells are converted into charcoal which has a higher calorific value through the pyrolysis process. The aim of this research is to determine the effect of comparing particle size and printing pressure on the length of burning time and burning temperature, so as to obtain a briquette composition that is durable and produces high temperatures. In this research, the raw material used was shell waste with a drying process of 400°C and the particle size variations used were mesh 30, 150 and 250 mixed with 12 grams of starch adhesive. The briquette molding process uses 3 kg and 5 kg pressure, which are then dried using an oven at a temperature of 750°C for 3 hours. Tests were carried out on burning time, burning temperature, water content and ash content. From the research results, it was found that for the highest temperature, briquettes with a particle size of 250 mesh were produced with a pressure of 5 kg at 312°C, and the flame duration of the briquettes was 240 minutes.
ANALYSIS OF TENSILE STRENGTH OF HDPE 3D PRINTER FILAMENT PRODUCTION PROCESS THROUGH TEMPERATURE AND TIME VARIATIONS Kharis, Abdul; Cristanto Putra Mbulu, Bernadus; Tugur Redationo, Nereus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.100

Abstract

Plastic waste is one of the problems currently being faced by countries in the world and Indonesia is one of them. Indonesia is the second world order of the world as a producer of plastic waste into the sea, which is 187.2 million tons after China which reaches 262.9 million tons. There are many kinds of plastic waste, including one of them HDPE plastic waste. In this study the researcher uses HDPE (High Density Poliyethylene) plastic waste which will be recycled into a filamentt of raw materials from 3D printers using temperature variations (200 ℃, 210 ℃, 220 ℃) with heating the heater band under 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above obtained the highest capacity results at a temperature of 200 ̊C with heating time below 1 hour which produces filamentt production of 48.48 mm3/minute with a weight of 0.0028 kg/hour and motorcycle speed 10 rpm. Then 6 specimens from each variation will be photographed micro and tested to reach the point of breaking up. After that the calculation is done to get the maximum tensile voltage value and strain. Then obtained the highest maximum tensile voltage value with a temperature of 220 ̊C and heating plastic under 1 hour with a tensile strength value of 3,3344 N/mm2 This happens because the internal pore structure of the filament is formed more tightly and the plastic properties are still in good condition, this indicates that the load applied is evenly distributed on the filament
COMPARISON OF VARIATIONS OF ROBUSTA AND ARABIKA COFFEE GROUNDS BY COMPOSITION (60%: 40%, 50%: 50%, 40%: 60%) TO DETERMINE THE HARDNESS AND CALORIFIC VALUE OF BRICKETS Aprilliano , Francisko; Tugur Redationo, Nereus; Cristanto Putra Mbulu, Bernardus
Mechanical, Energy and Material (METAL) Vol. 3 No. 1 (2025): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v3i1.121

Abstract

Along with the times, the availability of fossil energy is decreasing, especially natural gas and coal, before using fossil energy, humans have used biomass as an energy source. Indonesia has many plantation commodities, one of which is coffee which is the fourth largest coffee producer in the world. Coffee grounds are the main waste produced by coffee shops and are usually only thrown away. The main ingredients in this study were arabica coffee grounds and robusta. By using robusta composition 60% arabica 40%, robusta 50% arabica 50% robusta 40% arabica 60%. In addition, briquettes are tested for hardness by making points on the surface of the briquettes using a durometer shore A tool of 30 points, then a calorimeter bomb test is carried out to obtain the calorific value content. The result obtained from the highest hardness value is briquettes with a robusta mixture of 50% arabica 50% with a value of 23.7 HA, while the highest calorific value is found in a robusta mixture of 60% arabica 40% with a value of 4526.85 cal / gram.
THE EFFECT OF PRESSURE VARIATIONS (3 KG, 4KG, 5 KG, 5.5 KG) AND MESH (30, 100) ON THE HARDNESS AND COMBUSTION VALUE OF CANDLECRON SHELL BRIQUETTE De Jesus Moriera, Paulo; Tugur Redationo, Nereus; Crisanto Putra Mbulu, Bernardus
Mechanical, Energy and Material (METAL) Vol. 3 No. 1 (2025): Juni: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v3i1.131

Abstract

Through this research there are two variables observed, namely the effect of variations in briquette charcoal pressure and specific heat value on the composition of carbonisation of hazelnut shell charcoal with tapioca adhesive on specific heat value. The initial process of research in the form of making charcoal on hazelnut shell briquettes, hazelnut shells are carbonised at 500 °, sieved with mesh 30 and 100 sieves, given a compressive load of 3 kg, 4 kg, 5 kg and 5.5 kg, the adhesive on hazelnut shell briquettes is starch and drying is carried out with a drying oven for 3 hours at a temperature of 80 °. The purpose of this study was to determine the effect of variations in pressure and particle size on the quality of hazelnut shell briquettes when viewed from the combustion rate and calorific value. The methodology used in the research is by using hazelnut shell briquette experiments, hazelnut shell briquette testing includes testing through hardness and briquette calorimeter bomb value. Through the research, it was found that the highest calorific value was in the 4 kg pressure specimen on mesh 30, namely 9221.09 cal/gram while the lowest combustion rate was produced by the hazelnut shell briquette specimen with a pressure of 5 kg and 5.5 kg, which was 4076.17 g/min. Giving different compressive loads and mesh sieves can provide advantages to briquettes including increasing specific calorific value, reducing water content and slowing the combustion rate
Co-Authors Aprilliano , Francisko Crisanto Putra Mbulu, Bernardus Cristanto Putra Mbulu, Bernadus Cristanto Putra Mbulu, Bernardus De Jesus Moriera, Paulo Kharis, Abdul Mali, Alfin