IJIMCE : International Journal of Innovation in Mechanical Construction and Energy

Experimental Performance Analysis of A Solar Hybrid Recirculating Mixed-Flow Dryer With Different Drying Temperatures For Drying Paddy

Muhammad Yahya — 2025-02-20

This study is focussed on the performance of a solar hybrid recirculating mixed-flow dryer (SHRMFD) for drying paddy with different drying air temperatures. The drying experiments were carried out at average air temperatures of 50 °C, 60 °C and 70 °C. The SHRMFD reduced the mass of paddy from 420 kg (16.90% wb) to 406.07 kg (14.17% wb) in 360 min; from 420 kg (16.80 % wb) to 407.63 kg (14.17%) in 165.4 min; from 420 kg (16.75 % wb) to 407.35 kg (14.17% wb) in 143.3 min for average air temperatures of 50°C, 60°C and 70°C, respectively. The highest drying rate (3,324 kg/hour) was achieved at an average air temperature of 70°C. The specific moisture evaporation rate (0.171kg/kWh) and thermal efficiency of SHRMFD (25.04%) were achieved highest at an average air temperature of 50°C. The lowest specific energy consumption (11.804 kWh/kg) was achieved at an average air temperature of 50°C. The energy contributed by the biomass furnace and the solar collector for SHRMFD were 13.28 and 14.74%; 8.08 and 17.50%; and 6.10 and 20.35 for average air temperatures of 50°C, 60°C and 70°C, respectively. The SHRMFD performance is better at an average air temperature of 50°C because it has higher thermal efficiency and lower energy consumption.

Optimizing the Development of a PLTMH System Using Pelton Turbine Technology to Enhance Energy Efficiency in Remote Areas as an Affordable and Sustainable Renewable Energy Solution

Ichlas Nur — 2025-02-20

Remote areas often face challenges in providing reliable and affordable access to electricity, In West Sumatra, there are still many 3T areas that lack access to electricity. Renewable energy sources, such as Micro Hydro Power Plants (PLTMH), can be the ideal solution to meet the energy needs in these areas. However, to enhance the efficiency and sustainability of PLTMH, it is essential to optimize the development and utilization of technology, particularly in the application of Pelton turbines.The goal of this research is to produce a micro-hydro power plant that can work optimally and efficiently to generate electrical energy for people without access to electricity. It is hoped that this research can also help improve the community's economic situation by meeting their economic needs. This activity aligns with the goals outlined in the PNP strategic plan, which focuses on developing technology to support the community's economy.The method used in this research is applicable design and construction based on community needs, followed by tool design, tool making, assembly.Initial design data is discharge 50 Lt/s, Head 25 m. From the calculation results, it is found that the absolute speed of the jet is 21.6 m/s, the optimal jet diameter is 2.9 mm, the diameter of the puncture circle is 132.4 mm, the number of bowls is 34, the width of the bowl is 8.26 mm, the height of the bowl is 6, .96 mm, Bowl Depth 2.61 mm, Bowl Mold Allowance 11.92 mm, and generator 3 kW. The process of making a Pelton turbine involves making the Pelton turbine runner, installing the turbine blade to the runner, making the nozzle, installing the generator, painting the tool.

DEQOREL: An Intelligent Service Robot to Improve Restaurant Service Efficiency

Dea Qori Anjelika — 2025-02-20

Cafes have become a favorite place for various groups by providing a variety of food and drinks. However, challenges such as worker fatigue and human error often interfere with service. To overcome these problems, this research developed an intelligent waiter robot named Deqorel. Deqorel is designed to improve restaurant service efficiency through trajectory sensor-based automatic navigation and optimization algorithms. Deqorel is equipped with a 15-inch interactive screen, an energy-efficient DC motor, and a lithium-ion battery that supports operations for long periods of time. The robot frame uses 304 stainless steel with stress calculations to ensure strength and safety. The results show that Deqorel is able to provide accurate, fast, and responsive service in a dynamic restaurant environment, thereby increasing customer satisfaction as well as restaurant productivity.

Assessing the Feasibility of 3D-Printed Moulds in Sustainable Plastic Brick Fabrication

Hooi Peng Lim — 2025-02-20

Sustainable water-based food production systems are essential to meet the growing demand for food while preserving water resources and ecosystems. These systems should integrate practices that manage water efficiently, such as green water management. Such practices conserve water and ensure the production of nutritious food, contributing to food and water security. The correlation between these systems and the production of wave breakers moulds to produce plastic waste bricks lies in the shared goal of environmental sustainability. Plastic waste bricks, created by repurposing plastic waste into durable building materials, offer a solution to plastic pollution. These bricks can be used to construct wave breakers, which protect shorelines and prevent erosion. This project aimed to fabricate a 3D-printed wave breaker mould for sustainable plastic bricks. Experimental testing was carried out to investigate this mould’s feasibility. It has been deduced that using 3D-printed moulds for wave breakers can lead to innovations in coastal engineering, potentially improving the efficiency and effectiveness of wave energy dissipation and offering economic and environmental benefits. It is recommended that surface modification could be an alternative to improve the mould’s wear and friction impact.