Vol. 15 No. 1 (2023)

Fishermen use fishing aids called FADs to take advantage of Indonesia

Currently, the utilization of natural gas as an energy source needs to be optimized due to its increasing demand. The utilization of natural gas to produce LNG requires a high-pressure operating system of 1000 psig. The installation of a multistage centrifugal compressor unit is essential to maintain the operating pressure when there is a decrease in the feed gas pressure from natural gas wells. This study aims to predict the performance of the compressor that would be used and optimize the compressor operating conditions to satisfy the specifications of the gas selling pressure. In this…

A texture analyzer is a standard device to measure food texture properties. This study aims to develop a mini compression test machine prototype that can function as a texture analyzer with simple operation and portability. The components and materials were chosen based on: low cost, manufacturability, and availability in the local Indonesian market. The prototype dimension was 375 × 215 × 450 mm, and used a linear ball screw slider for the translation movement with a 200 mm effective sliding distance. For obtaining the compression load, a 10 kg load cell was used, and it was replaceable by a…

In the digital transformation of manufacturing and service companies towards Industry 4.0, it will require the presentation of digital information as cognitive support for their work. Pupuk Indonesia encourages its subsidiaries to implement digitalization innovations to strengthen subsidiary synergy, namely the implementation of the Digital Fertilizer system. Digital Fertilizer is a system that functions to monitor factory performance online which is useful to support increasing the reliability of production facilities. Therefore, PT Pupuk Indonesia Utilitas Gresik Gas Co-Generation Plant…

Growing coffee consumption in Indonesia has resulted in increasing used coffee ground and husk containing tannins, alkaloids, and polyphenols, which oftentime just being dumped in the landfill, causing pollution to the environment. This study aimed to convert coffee waste into composite that can be used to create a valuable product. The coffee waste was used as the dispersed phase and other additional materials as the matrix phase of the composite. Depending on its application, a functional product is subjected to mechanical loads, such as tensile, compressive, torsional, or bending loads.…

The research was developed using digital twin techniques to predict thermal loads through real-time data on the HVAC system in the data center. The physical device system was digitalized using IoT (Internet of Things) technology, and through this technology, a digital space was created to represent the prediction model. Instrumentation for data acquisition and real-time monitoring systems was created using IoT techniques, as well as an analysis of the performance of the data center cooling system. The aim of this research was to obtain thermal load predictions for the data center energy…