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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Majalah Ilmiah MOMENTUM
Edi Pujianto
Universitas Muhammadiyah Semarang
Automotive Engineering Control & Systems Engineering Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Unjuk kerja catalytic converter katalis tembaga krom terhadap penurunan temperatur emisi bas buang motor bensin RM Bagus Irawan; Edi Pujianto; Muh Faishal Khairi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 16, No 2 (2022): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.16.2.131-136

Abstract

Catalytic Converter is a technology used to reduce air pollution which is installed in the exhaust gas (muffler) of gasoline motorized vehicles. This Catalytic Converter serves to accelerate the oxidation of Hydrocarbon (HC) and Carbon Monoxide (CO) gas emissions, as well as to reduce Nitrogen Oxide (NOx). Changes in exhaust emissions mentioned above are strongly influenced by the working temperature of the Catalytic Converter. Chrome Copper metal material as a catalyst material, will be investigated and tested on a laboratory scale, first to see the effect of changes in engine speed to temperature, secondly changes in temperature when using a Catalytic Converter with a Copper catalyst and thirdly changes in temperature when using a Chrome Copper Catalyst in the exhaust gas channel . The results of the study were first obtained that changes in engine speed affect the increase in temperature of the Catalytic Converter, the higher the engine speed the temperature rises and vice versa at low engine speed the temperature tends to decrease. The two installations of the Catalytic Converter caused the temperature to drop, at 3000 rpm engine speed (without the Catalytic Converter) the temperature was 317.5 ºC and fell to 227.36 ºC in 5 catalyst cells, 218 ºC in 10 cells and 230 ºC in 15 cells. (with Cu Catalytic Converter). Whereas in the installation of a Chrome Copper Catalytic Converter, at 3000 rpm engine speed (without Catalytic Converter) the temperatur of 317.5 ºC drops to 237.5 ºC in 5 catalyst cells, 240.84 ºC in 10 cells and 249 ºC in 15 cells, where the decrease in temperatur that occurs is higher with the use of a copper catalyst.
Pengaruh Temperatur Lingkungan Terhadap Kinerja AC Split 1 PK dengan Refrigerant R32 dan Brezon edi pujianto; Selamet Saefudin; Purnomo; Muhammad Ragil Febryan; Rizka Noor Miftakhul Ulum
JURNAL ILMIAH MOMENTUM Vol 21 No 2 (2025): Oktober 2025
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/mim.v21i2.14372

Abstract

Air conditioners (AC) are among the most widely used appliances in tropical countries such as Indonesia. However, high energy consumption and the use of refrigerants with high Global Warming Potential (GWP) pose major challenges to energy and environmental sustainability. This study aims to analyze and compare the thermodynamic performance of two types of refrigerants, namely R-32 and Breezon MC32 (R-1270), in a vapor-compression refrigeration system. Performance tests were conducted under varying ambient temperatures (28 °C, 31 °C, and 34 °C) and evaporator loads (19 °C, 22 °C, 25 °C, 28 °C). The main parameters analyzed include power consumption, compression work, mass flow rate, compressor power, heat rejection, refrigeration effect, cooling capacity, and Coefficient of Performance (COP). The results show that Breezon MC32 with a 90% charge mass achieves a higher COP and lower power consumption compared to R-32 with a 100% charge, particularly under high ambient temperature conditions. This demonstrates the potential of Breezon MC32 as a more environmentally friendly and energy-efficient alternative refrigerant. Keywords: cooling capacity, power consumption, COP, R-32, Breezon
Co-Authors Muh Faishal Khairi Muhammad Ragil Febryan Purnomo Rizka Noor Miftakhul Ulum RM Bagus Irawan Selamet Saefudin