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All Journal Jurnal Kesehatan Lingkungan indonesia Jurnal Ilmu Lingkungan Journal of Engineering and Technological Sciences Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Teknologi Terapan International Journal of Applied Technology Research Jurnal Difusi Industrial Research Workshop and National Seminar Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Polimesin
Kasni Sumeru
Department Of Refrigeration & Air Conditioning Engineering, Politeknik Negeri Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Journal : Jurnal Polimesin

 1 
Energy and exergy performance of R290 as a substitute for R404A in freezers: experimental investigation Akmal, Muhammad; Sumeru, Kasni; Tohir, Toto; Hikmat, Yudi Prana; Nuryati, Neneng; Sulaimon, Shodiya
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6153

Abstract

The refrigeration sector significantly contributes to global warming due to the high Global Warming Potential (GWP) of commonly used refrigerants. This study experimentally investigates the feasibility of using R290 as a low-GWP substitute for R404A in freezer applications. Although R290 and R404A have similar normal boiling points, their GWP values differ significantly (3 for R290 vs. 3922 for R404A), making R290 a more environmentally friendly alternative. Experiments were conducted on a freezer originally designed for R404A with a 1/3 HP compressor and a refrigerant charge of 170 g. After baseline testing with R404A, the system was retrofitted with R290, using an optimized charge of 62.9 g. The system's performance was analyzed over 120 minutes, with energy and exergy evaluations conducted at 60 minutes, when the cabin temperature stabilized. Results from energy analysis indicate that replacing R404A with R290 led to a 6.1% increase in cooling capacity, a 6.0% reduction in power consumption, and a 12.4% improvement in COP. Exergy analysis showed that total irreversibility decreased from 318.1 W (R404A) to 289.8 W (R290), with compressor irreversibility being the dominant factor (50.8% for R404A vs. 51.3% for R290). The findings confirm that R290 enhances system performance by reducing irreversibility and energy consumption. These results highlight R290 as an energy-efficient and environmentally friendly alternative to R404A, providing both operational cost savings and reduced environmental impact. However, to achieve optimal performance, compressor lubricant replacement is recommended when transitioning to R290.
Designing of Evaporator Length in Very Low Temperature Chest Freezer by using Environmentally Friendly Refrigerant R290 Sumeru, Kasni; Nugraha, Ridwan; Badarudin, Apip; Simbolon, Luga Martin; bin Sukri, Mohamad Firdaus; Yuningsih, Nani
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4103

Abstract

Chest freezers generally use R600a or R134a as working fluids. When using R600a, the minimum cabin temperature is only -10oC, whereas when using R134a, it can reach -25oC. The purpose of this study is to calculate the evaporator length of a chest freezer that uses R290 as a refrigerant so that its cabin temperature can reach below 35 oC, lower than the cabin temperature of a typical chest freezer. Calculation of the evaporator pipe length is done using the forced convection heat transfer equation to calculate the heat transfer coefficient inside the evaporator pipe and natural heat transfer to calculate the heat transfer coefficient outside the evaporator pipe.  Based on the calculations, the chest freezer has a compressor capacity of 200 W, an evaporator length of 3.57 m, and a diameter of 3/8 inch or 9.52 mm. The test results show that the temperature of the chest freezer cabin can reach -36oC in the 36th minute with a cooling capacity of 289 W, while the input power and COP are 198 watts and 1.46, respectively. Compared to R134a, the use of R290 is more advantageous. In addition to lower cabin temperatures, it is also much more environmentally friendly, because the GWP (global warming potential) value of R134a is much higher than that of R290. It means that the use of R290 as a working fluid in the chest freezer will significantly reduce emissions of gases that cause global warming.
Energy savings in residential air conditioners using condensate cooling in discharge and liquid lines Yuningsih, Nani; Sumeru, Kasni; Aldiansyah, Muhammad; Tritjahjono, Rachmad Imbang; Nugraha, Fathurahman Yudhi; Abioye, Adenkunle Moshood
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.6739

Abstract

This research investigates the use of condensate produced by the evaporator to cool the discharge and liquid lines in order to reduce electricity consumption in a residential split-type air conditioner (AC). The experimental setup used a 0.75 kW compressor with R32 refrigerant, where the discharge and liquid line heat exchangers were 20 cm and 15 cm long, respectively. Data were collected over 180 minutes at 5-minute intervals. Results show that using the liquid line cooler (LLC) alone reduced electricity consumption by 5.3% and increased cooling capacity by 2.3%. Using the discharge line cooler (DLC) alone reduced electricity consumption by 8.3% and increased cooling capacity by 7.3%. When both coolers were applied simultaneously (LDC mode), electricity consumption decreased by 10.9% and cooling capacity increased by 9.7%. The corresponding improvements in coefficient of performance (COP) were 9.1% (LLC), 18.6% (DLC), and 24.7% (LDC). These results indicate that using condensate to both the discharge and liquid lines is more effective in reducing electricity consumption and improving AC performance than cooling only one line.
Investigation Of Automotive Air Conditioning Using Eco-Friendly R600a As An Alternative Refrigerant To R134a Sumeru, Kasni; Arman, Muhammad; Wellid, Ismail; Simbolon, Luga Martin; Setyawan, Andriyanto; bin Sukri, Mohamad Firdaus
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4463

Abstract

One of the main reasons for replacing R134a with R600a is the impact of global warming. In this study, a numerical approach was applied to investigate changes in automotive air conditioning (AAC) performance due to the replacement of R134a with R600a. A thermodynamic evaluation was carried out with evaporating and condensing temperatures of 5oC and 45oC, respectively. The study simulates AAC performance at five engine rotation speeds: 1000, 2000, 3000, 4000 and 5000 rpms. The results show that replacing R134a with R600a reduces the cooling capacity and input power by 45.42% and 47.02%, respectively. However, due to the dominant decrease in input power as compared to the decrease in cooling capacity, the COP of AAC increases by 2.93%. Although the increment in COP is relatively small, this replacement greatly contributes to the reduction of greenhouse gas emissions that causes the problem of global warming due to the lower GWP of R600a as compared to R134a.
Co-Authors Abioye, Adenkunle Moshood Afif Miftakh Hafidzudin Aji A. B. Aldiansyah, Muhammad Andriyanto Setyawan Apip Badarudin Ary Surjanto Azhar Abdul Aziz Badarudin, Apip bin Sukri, Mohamad Firdaus Cecep Sunardi Endramawan, Tito Falahuddin, Muhammad Anda Farid Nasir Ani Farid Nasir Ani Firdaus Bin Sukri, Mohamad Haslinda Mohamed Kamar, Haslinda Mohamed Henry Nasution Henry Nasution Husain Akbar Sumeru Ismail Wellid Ismail Wellid Joshua Putra Nahim Kamil Muhammad Gunaprawira Luga Martin Simbolon Luga Martin Simbolon Luqman Raji Markus Markus Mitrakusuma, Windy Hermawan Mohamad Firdaus bin Sukri Mohamad Firdaus bin Sukri Mohamad Firdaus bin Sukri Mohamad Firdaus bin Sukri Mohamad Firdaus bin Sukri Mohamad Firdaus bin Sukri Mohd Farid Muhammad Said, Mohd Farid Muhammad Mohd Rozi Mohd Perang Muhamad Anda Falahuddin Muhamad Anda Falahuddin Muhammad Akmal Muhammad Arman Muhammad Idrus Alhamid, Muhammad Idrus Muliawan, Rizki Nanda Fauzan Pratama Nani Yuningsih Nani Yuningsih, Nani Nazri Kamsah, Nazri Neneng Nuryati Neni Emrida Panjaitan Nida’Ul Farihah Nita Nurfitriani Novianti, Senia Firlania Nugraha, Fathurahman Yudhi Nugraha, Ridwan Nuriyadi, Muhammad Nuryati, Neneng Pradita, Didiet Tricahya Ridwan Nugraha Ridwan Nugraha Salma Dzakiyah Az-zahro Senia Firlania Novianti Shodiya Sulaimon Shodiya Sulaimon Shodiya Sulaimon Sifa, Agus Simbolon, Luga Martin Sunardi, Cecep Suwandi, Dedi Tandi Sutandi Toto Tohir Triaji Pangripto Pramudantoro Tritjahjono, Rachmad Imbang Wellid, Ismail Y Gajawa Yudi Prana Hikmat