Article Per Year (5 Year)
p-Index From 2020 - 2025
0.983
P-Index
This Author published in this journals
All Journal Rotasi Jurnal Sains dan Teknologi ROTOR: JURNAL ILMIAH TEKNIK MESIN JURNAL INTEGRASI Manutech : Jurnal Teknologi Manufaktur Jurnal Teknik Mesin
Yazmendra Rosa
Teknik Mesin Politeknik Negeri Padang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search
Journal : Jurnal Teknik Mesin

 1 
Pengaruh Retrofit Refrigeran CFC-12 Dengan HCR-12 Terhadap Kinerja Refrigerator Domestik dan Perawatannya Isnanda Isnanda; Yazmendra Rosa; Elvis Adril; Feidihal Feidihal
Jurnal Teknik Mesin Vol 12 No 2 (2019): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In the recent years,almost every house, has domestic refrigerator wich still use CFC-12 refrigerant as the fluid.When the leakage happen, the refrigerant causes the demage of ozon such as forming the ozon side then radiation of ultra violet from the sun ray in high intensity reach the surface on each directly and it is dangerous for the human life. The Hidrocarbon refrigerant (HCR-12) is considered as one of alternative, wich is environmentally friendly,more energy to save and without modification, to replace the CFC-12.This research compare the performance of household refrigerator using the CFC-12 refrigerant and HCR-12 without the modification of refrigerator.The result shown from the COP, that the refrigerators work for both of refrigerant is relatively the same and the quality of the ice product from HCR-12 is better than CFC-12, because the amount of the energy wich is absorbed by HCR-12 during the evapouration process is bigger than CFC-12. Analyzing the amount of refrigerant weight fullfilled to refrigerator, HCR-12 only uses 40 % from CFC-12,If the price of both refrigerant is the same,the use of HCR-12 is profitible than the use of CFC-12
Perancangan Mesin Pemutar Gerabah Dengan Kekuatan Tumpuan Maksimal 10 kg Sir Anderson; Yazmendra Rosa; Khairul Amri; Maimuzar Maimuzar; Hendra Hendra; Aqli Ridawansyah
Jurnal Teknik Mesin Vol 16 No 1 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.1.980

Abstract

Pottery is an art craft made from clay which besides having a high use value also has a pretty good aesthetic value. Pottery craft business has existed in Indonesia since ancient times until now. This business has a deficiency in the production machine part, where the production machine still uses human power as the main driving force during the rotation during the pottery making process. Therefore, a modification of a better pottery turning machine is needed to support the pottery craft business. The design of this pottery turning machine uses a working drawing design of a pottery turning machine product with a rotating speed that can be adjusted according to work requirements via a speed control pedal. The pottery turning machine has a strong construction with machine specifications of length 760 x width 400 x height 700 mm, with the addition of 2 pulleys with a first pulley diameter of 2.5 inches, and a second pulley diameter of 12 inches with a connecting belt using type A-57. And by using umbrella gears with a ratio of z1 = 25 and z2 = 50 with a maximum pedestal capacity of 10 kg.
OPTIMASI UDARA PANAS KELUARAN KOLEKTOR ENERGI SURYA Yazmendra Rosa; Hanif Hanif; Zulhendri Zulhendri
Jurnal Teknik Mesin Vol 1 No 1 (2004): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Indonesia is one of the countries which has high intensity solar radiation. This is very useful in term to exploite solar radiation for drying processes. However, most drying processes are done naturally. This method has many constraints. By improvement of solar collector technology, the drying processes could be done more better. Unfortunately, most solar collectors still have many limitation due to generating high output temperature. Therefore, in this present study, the solar collector is tried to optimizing by enlarging area of frontal surface of solar radiation and increasing rate of air flow out in term to maximize the drying processes. Result shows that by flowing the air constantly (0, 122 m3/s) on 1 m2 surface area will generate output temperatur to approximately 90,2 oC
ANALISIS ONGKOS PENDIDIKAN PERGURUAN TINGGI DALAM MENYONGSONG PERGURUAN TINGGI NEGERI MENJADI BHMN Hendra Hendra; Yazmendra Rosa; Arwizet K
Jurnal Teknik Mesin Vol 1 No 2 (2004): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cost production in the education is the important. Education Quality influence by performance in personal and facility. The good personal and facility is affecting cost production (education). Height quality education consumption cost produced is more expensive. To cost education can be minimization. with the analyses cost production (education) example calculated overhead, cost operational and etc. Level of this education fare can be applied by paying attention ability of consumer so those process studies stand at bay with quality of good education.
Co-Authors Andriyanto Andriyanto Aqli Ridawansyah Arwizet Arwizet, Arwizet Dian Wahyu Eka Sunitra Elvis Adril Fadhlulrahman, Zaki Fadhlurrahman, Zaki Feidihal Feidihal Hanif Hanif Hanif Hanif Hendra Hendra Hendra Hendra Hery Widijanto Isnanda Isnanda Khairul Amri Maimuzar Maimuzar Nasirwan Nasirwan Nofriadi Nofriadi Rino Sukma Sir Anderson Tri Wahyu Widodo Yuli Y Yuli Yetri Zulhendri Zulhendri