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Ahmad Imam Rifa’i
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Automotive Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Tekanan Refrigeran R-134a Terhadap Nilai Coefficient of Performance (COP) Ahmad Imam Rifa’i; Novarini
Jurnal INOVATOR Vol. 3 No. 2 (2020): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v3i2.136

Abstract

Refrigeran is a major component in an Air Conditioner (AC) system. AC is a cooling system used as a room temperature conditioning tool, so it is comfortable to use in indoor activities. The refrigeran pressure in the cooling system can reduce the air conditioner's ability to condition the room temperature. The purpose of this study was to determine the coefficient of performance (COP) value of refrigeran R-134a with variations in refrigeran pressure of 100, 125, and 150 psi. The parameters studied were the compressor's energy consumption, the cooling capacity, and the COP value. Energy consumption is calculated based on the compressor power multiplied by the length of time the compressor is operated. The results show that the COP value decreases with an increased operating time of the cooling system; this indicates that energy consumption increases with increasing refrigeran pressure.
Studi Eksperimental Pengaruh Bukaan Katup Inlet dan Outlet Ring Blower RB-200S Novarini; Dhany Murtono; Ahmad Imam Rifa’i
Jurnal INOVATOR Vol. 4 No. 1 (2021): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v4i1.140

Abstract

The blower is a device used to increase the air pressure and increase the flow rate of air and gas. In this study, the effect of the inlet and outlet valve openings of the ring blower was experimentally investigated. Variations in the inlet and outlet valve openings are 50%, 75%, and 100%, respectively. The results showed that the larger the opening of the inlet and outlet valves, the greater the flow capacity (Q). Furthermore, the larger the inlet and outlet valve openings, the lower the ring blower air flow pressure (P).
Rancang Bangun Alat Pencetak Rempeyek Bulat Diameter 90mm Hilda Porawati; Ahmad Imam Rifa’i; Gentur Pressa Reforandika; Fahrur Razi Ramadhan
Jurnal INOVATOR Vol. 5 No. 1 (2022): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v5i1.149

Abstract

The peanut brittle product is very popular with the public so that many processors produce it, which are sold in various places, ranging from traditional markets to modern markets. The application of appropriate technology to increase production capacity is very much needed by Micro, Small and Medium Enterprises (MSMEs). In this research, the design of the peanut brittle fryer has been made using a round mold which has 10 peanut brittle molds with a spring lever system that is operated manually. The results showed that the frying pan had a diameter of 90 mm and a mold thickness of 2 mm and totaled 10 pieces in one frying process. The use of stainless material in the mold causes the dough to stick at the peanut frying stage.
Co-Authors Dhany Murtono Fahrur Razi Ramadhan Gentur Pressa Reforandika Hilda Porawati Novarini