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All Journal JPM17: Jurnal Pengabdian Masyarakat Infotekmesin Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim
Supardi Supardi
Universitas 17 Agustus 1945 Surabaya
Arts Humanities Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences

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PEMBUATAN KOMPOS ANAEROB DENGAN MENGGUNAKAN KOMPOSTER SEDERHANA YANG DITERAPKAN DI DUSUN SIDOMULYO Supardi Supardi; Elisa Sulistyorini
JPM17: Jurnal Pengabdian Masyarakat Vol 5 No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/jpm17.v5i2.4095

Abstract

Organic waste from household can cause air pollution, produces stench. Actually, organic waste can be used to make compost. compost is very useful for fertilizing plants. The purpose of the enlightenment is making compost. The making compost education as an effort to empower low educate communities and optimize the use of organic waste to produce compost. Making compost also can improve skill of communities in Sidomulyo, Babakbowo, Gresik. The long term goal of this extension program is increasing the intelligence and provision of skills to be able to make their own compost and composter. The method that used in the community service program is counseling and assistance in making compost from organic waste. The step of this program began with the socialization and counseling of making compost and composter from household waste. The composter is made by using anaerob composter system. Keywords: Compost, Organic, Anaerob
Analisa Tegangan dan Deformasi Pada Desain Kursi Menggunakan Finite Element Method Dengan Variasi Pembebanan Didik Sugiono; Suprapto Suprapto; Yopan Rahmad Aldori; Supardi Supardi
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2807

Abstract

The manufacturing process is an activity of processing raw materials into products to increase added value. One of these products is chair furniture; to reduce errors and failures in its manufacture, it is necessary to do prototype model experiments first. This research conducts a simulation study and analysis of the chair design on stress, deformation and safety factor using the Finite Element Method approach with the help of ANSYS ADPL 18.0 static structural software where the chair design is made of 304 stainless steel, aluminum-T6, HCP 30 polymer foam in one chair structure by simulating several static load loading scenarios, boundary conditions, and even distribution on the surface of the chair. The simulation results show that the highest maximum stress distribution (von misses stress) is 3.5 Mpa at a pressure of 175 kg.f, for the lowest value of 1.5 Mpa at a pressure of 5 Kg.f and a deformation (displacement) of 0.145x10ˉ4 mm occurs at a pressure of 175 Kg.f, while the lowest deformation value of 0.621x10ˉ5 occurs at a pressure of 75 Kg.f, This is due to the loading increasing along with the applied pressure force, but still in the minimum safety factor standard position for static loads, so as not to damage the geometric structure.
Analisa Pengaruh Variasi Susunan Pipa Kondensor, Masa Refrigerant, dan Kecepatan Aliran Udara Kondensor Terhadap Performa Kulkas R-600a Lucas Gempar Febria Nata Reksa; Wahyu Assrul Alhamsah; Supardi Supardi
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4816

Abstract

This study aims to analyze the effects of condenser pipe configuration, refrigerant charge, and condenser airflow velocity on the performance of a refrigerator using R-600a refrigerant. The condenser pipe configurations investigated were U10, U12, and U14, with refrigerant charges of 46 g, 48 g, and 50 g, and condenser fan speeds of 1000 rpm, 1200 rpm, and 1300 rpm. The observed parameters included the refrigerant mass flow rate (ṁ), compressor work (W), condenser heat rejection capacity (Qc), and Coefficient of Performance (COP). The analysis was conducted based on enthalpy data at each point of the refrigeration cycle and the performance test results of the cooling system.The results indicate that increasing the number of condenser pipe passes and the refrigerant charge tends to enhance the condenser's heat rejection capability, thereby improving overall system performance. The optimum configuration was achieved with the U14 condenser pipe arrangement, a refrigerant charge of 50 g, and a condenser airflow velocity corresponding to a fan speed of 1300 rpm. This configuration produced a refrigerant mass flow rate of 0,0184 kg/s, compressor work of 1,32 kW, condenser heat rejection capacity of 5,65 kW, and the highest COP value of 4,28. In contrast, the lowest performance was obtained with the U10 condenser pipe arrangement, a refrigerant charge of 48 g, and a fan speed of 1000 rpm, resulting in a COP of 3,27. In general, increasing the condenser airflow velocity improved the condensation process and enhanced system efficiency, particularly for longer condenser pipe configurations. The findings demonstrate that the combination of condenser pipe configuration, refrigerant charge, and condenser airflow velocity has a significant effect on the performance and energy efficiency of an R-600a refrigerator.
Co-Authors Didik Sugiono Lucas Gempar Febria Nata Reksa Sulistyorini, Elisa Suprapto Suprapto Wahyu Assrul Alhamsah Yopan Rahmad Aldori