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All Journal Journal of Engineering and Technological Sciences International Journal of Applied Technology Research Jurnal Polimesin
Shodiya Sulaimon
Department of Mechanical Engineering, Faculty of Engineering, University of Maiduguri (UNIMAID),
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : International Journal of Applied Technology Research

 1 
Numerical Investigation of the Effect of Changes in Glass Typeon the Cooling Load in a Building Sunardi, Cecep; Mitrakusuma, Windy Hermawan; Pradita, Didiet Tricahya; Kasni, Sumeru; Sulaimon, Shodiya
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 1 (2024): February 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i1.145

Abstract

Solar radiation enters the building through the glass by both radiation and conduction. The heat passing through the glass is one of the largest cooling loads. Therefore, modifying the glass type, will potentially reduce the cooling load significantly. This numerical study uses Cooling Load Temperature Difference (CLTD) method to calculate the change in cooling load in a five-story hospital. The Glass material was changed from clear glass to coated glass. Based on the calculation of cooling load per hour, from 07.00 to 19.00, it is obtained that the peak load occurs at 17.00, both when using clear glass clear and coated glass. The replacement of clear glass with coated glass results in a 70.0% decrease in radiation cooling load, from 104.59 kW to 31.38 kW. In addition, replacing this type of glass will reduce the total cooling load by 17.0%, from 418.80 kW to 347.57 kW. The decrease in total cooling load will lead to a decrease in the operational cost of the air conditioning system. If it is assumed that the AC system operates at 75% peak load for 16 hours per day, then replacing the glass will reduce electricity costs by approximately Rp. 43.6 million/month.
Energy and Exergy Analysis of Chest Freezer Using R134a and R290 as Working Fluids Based on Experimental Data Pramudantoro, Triaji Pangripto; Muliawan, Rizki; Nuriyadi, Muhammad; Hidayat, Syarif; Tohir, Toto; Sulaimon, Shodiya
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 2 (2024): June 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i2.153

Abstract

Although R134a has a very high global warming (GWP) effect, it is still used as a refrigerant in chest freezers. As an alternative to R134a is R290 which has a very low GWP value, which is only 3. Therefore, it is expected that there will be no more chest freezers using R134a and replaced with R290, soon. Thermodynamic studies need to be conducted to see the advantages and disadvantages of the two refrigerants based on experimental data. In this study, a chest freezer which was originally manufactured for R134a with a charging mass of 150 g was used as a test object. Experimental data of the chest freezer using R290 was taken after testing with R134a was completed. Experimentally, the cabin temperatures of the chest freezer using R134a and R290 are -20.5oC and -35.7oC, respectively, and the input power are 264 W and 176 W, respectively. Total irreversibility on the four main components of the chest freezer using R134a is greater than using R290, namely 184.4 W and 107.0 W, respectively. This means that the use of R290 as a working fluid in the chest freezer is more efficient. There are at least three advantages of replacing R134a with R290, namely reducing greenhouse gas emissions because R290's GWP is much smaller than R134a, lower cabin temperature, and decreasing the input power of the chest freezer.
Co-Authors Abdul-Halim Abdul-Rahman Amer N. Darus Azhar Abdul Aziz Henry Nasution Kasni Sumeru Mitrakusuma, Windy Hermawan Muhammad Akmal Muliawan, Rizki Nuriyadi, Muhammad Nuryati, Neneng Pradita, Didiet Tricahya Pramudantoro, Triaji Pangripto Sunardi, Cecep Syarif Hidayat Toto Tohir Yudi Prana Hikmat