Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal GEMA TEKNOLOGI Jurnal Pengabdian Vokasi
Juli Mrihardjono
Program Studi S.Tr. Rekayasa Perancangan Mekanik, Sekolah Vokasi, Universitas Diponegoro
Computer Science & IT Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
EFEK PENAMBAHAN EVAPORATOR PADA ATMOSPHERE WATER HARVESTER (AWH) TERHADAP PERFORMA SISTEM Juli Mrihardjono; Didik Ariwibowo; Sutrisno Sutrisno; Dista Yoel Tadeus
Gema Teknologi Vol 21, No 2 (2021): October 2020 - April 2021
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v21i2.33448

Abstract

Atmosphere Water Harvester (AWH) was investigated to get water collected from air in elevated performance. Improvement was performed by introducing a series-arrangement of two evaporators. Air flew through the evaporators in cross-flow. This arrangement would influence performance of the AWH system in title of COP, MHI, and specific energy consumption. The AWH was designed using vapor compression refrigeration system. Parameter measured to the system were refrigerant temperature in suction and discharge line, inlet and outlet pipe wall temperatures at evaporator and condenser, air velocity enter into evaporator, and electrical energy consumption. Instrument used in this research were refrigerant pressure-temperature gauge, K-type digital thermometer, digital fan anemometer, thermo-hygro meter, and kWh meter. Air temperature and RH data were 36,5 oC, 40%, and 19 oC, 42 %  for inlet and outlet air stram at evaporator, subsequently. With air velocity 1.5 m/s, the COP of the system was 3.7. Water collected  from AWH was 1.1 litres/hour with energy consumption of 1.24 kWh. The AWH could be considered as a water harvester with value of specific energy of 1.13 kWh/litre and MHI of 0,2.
INTRODUKSI TEKNOLOGI ROASTING UNTUK MENINGKATKAN PRODUKTIVITAS INDUSTRI KOPI ROBUSTA GUNUNG KELIR Didik Ariwibowo; Sutrisno Sutrisno; Seno Darmanto; Juli Mrihardjono; Mohammad Endy Yulianto; Riana Sitawati
Jurnal Pengabdian Vokasi Vol 1, No 4 (2020): Nopember 2020
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.801 KB) | DOI: 10.14710/jpv.2020.9239

Abstract

Program for regional superior product (PPUD-DIKTI) year 2020 aims to increase income of coffee farmers who incorporated in Rahayu IV Gunung Kelir by introduction of roaster. This introduction was done by considering that the farmers was potentially developed from coffee bean to coffee powder producers. PPUD was conducted by Teams from LPPM UNDIP. The program was excecuted in steps: i) designing of roaster machine, ii) roaster machine fabrication, iii) implementation, and iv) evaluation. Program evaluation was performed by analyzing to income added from farmers. Roaster was designed dan fabricated with capacity of 3 kg/batch and processing time of 15-20 minutes. After program implementation, the farmers roasted coffee bean by themselves. Therefore, there was a different value between outsider service-roasting, that done before, and self-roasting of Rp. 10.000,-. Besides self-roasting, the farmers commercialize the roaster as roasting services with rates Rp. 15.000,; per kilograms. Result of this PPUD program shows that during 1 month, the farmers earned Rp. 4.250.000,-. This predicted that the earning would increase 4 times because of the roaster operated in 0,25 off capacity by now. This prediction based on a calculation of roaster operating in 20 days and 7 hours effective time per day.
PENINGKATAN PRODUKTIVITAS INDUSTRI KACANG METE MELALUI PENGEMBANGAN OTOMASI OVEN MULTI RAK Didik Ariwibowo; Sutrisno Sutrisno; Mohamad Endy Yulianto; Juli Mrihardjono
Jurnal Pengabdian Vokasi Vol 2, No 4 (2022): November 2022
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpv.2022.16514

Abstract

The activities of Iptek Bagi Desa Binaan (IBDU) UNDIP tahun 2021 aims to increase the productivity of the Tiga Saudara cashew nut small scale industry  partner through introduction of a thermocontrolled multi-rack oven, so that quality of cashew nuts would be uniform, shorter processing time, and therby increasing income. The activity of multi-rack oven development was carried out by the Community Service Team of LPPM UNDIP through Iptek Bagi Desa Binaan (IBDU) program. The program was carried out instages including: i) oven design, ii) oven manufacturing, dan iii) functional and adaptation testing, dan iv) oven operation. The purpose of adaptation test is to operate the oven in relevance environment, whereas operationalization was to operate in an actual environment. Implementation of IBDU activites carried out by by the Community Service Team of LPPM UNDIP through the introduction of oven has had positive impact on Tiga Saudara’s partner. The thermocontrolled multi-rack oven has shown that the performance of these equipment is better, able ti produce uniform cashew nut quality so that productivity increases
Co-Authors Didik Ariwibowo Dista Yoel Tadeus Mohamad Endy Y Yulianto Riana Sitawati Seno Darmanto Sutrisno Sutrisno Sutrisno, Sutrisno