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All Journal Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik
Mustafa Mustafa
Universitas Merdeka Madiun

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Pengaruh Kolektor Pelat Gelombang Dengan Dua Kaca Penutup Terhadap Penambahan Panas Untuk Meningkatkan Kinerja Solar Water Heater Dian kusuma; Mustafa Mustafa; Sudarno Sudarno
JURNAL PILAR TEKNOLOGI Jurnal Ilmiah Ilmu Ilmu Teknik Vol. 4 No. 1 (2019): Jurnal Pilar Teknologi
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v4i1.25

Abstract

The worked principle of solar collector wave absorber plate was to transfer solar radiation to the worked fluid. The solar radiation that falls on the first glass was partially reflected, then on the second glass partially absorbed by the absorbent plate. The heat absorbed by the absorbent plate will be used to heat the worked fluid (water) between the absorbent plate and the storage plate. The purpose of this research was to design and make solar collector used wave plate with two cover glass. The addition of incomed water heat used temperatures of 30 ° C, 40 ° C, 50 ° C. The method used was used an expriment by analyzed the effect of initial heat addition on efficiency. From the results of test data obtained collector performance of solar water heater the greater the addition of heat used then the smaller the efficiency. Each of the average heat additions efficiency at 30 ° C was 19.66%, the temperature of 40 ° C was 17.75%, and the temperature of 50 ° C was 12.23%.
Faktor Yang Mempengaruhi Flame Cutting CNC Dan Waktu Pendinginan Terhadap Kekerasan Mustafa Mustafa; Sudarno Sudarno
JURNAL PILAR TEKNOLOGI Jurnal Ilmiah Ilmu Ilmu Teknik Vol. 6 No. 1 (2021): JURNAL PILAR TEKNOLOGI
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v6i1.68

Abstract

Abstract— In material that is subjected to heat treatment or workmanship such as in the welding process or flame cutting cutting, it will experience structural changes and mechanical properties. Changes in mechanical properties will cause losses such as: material becomes hard and brittle, although tensile strength and wear resistance increases. In this study an analysis of the factors affecting flame cutting cnc and cooling time against hardness was carried out. This study aims to determine the factors that influence the change in hardness on the results of flame cutting cutting. The study was conducted with three different treatments. The results of flame cutting cutting are cooled with 10 seconds, 25 seconds and 50 seconds respectively. Hardness data collection was carried out at a distance of 2 mm, 10 mm, 20 mm, 30 mm, 40 mm and 50 mm. The experimental results showed that the hardness value of SS 400 material at 10 seconds cooling time resulted in an average hardness of testing 1 = 76 HRB, testing 2 = 76 HRB, testing 3 = 76 HRB. At 25 seconds cooling time produces the average hardness from testing 1 = 74.83 HRB, testing 2 = 74.66 HRB, testing 3 = 74.33 HRB. And the 50-second cooling time produces the average hardness of the test 1 = 73.66 HRB, testing 2 = 73.33 HRB, testing 3 = 7658 HRB. Keywords—: flame cutting; SS 400; hardness.
Co-Authors Dian Kusuma Sudarno Sudarno