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Jurnal Teknologi Pertanian
Published by Universitas Brawijaya
ISSN : 14115131     EISSN : 25282794     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT
Jurnal Teknologi Pertanian diterbitkan oleh Fakultas Teknologi Pertanian Universitas Brawijaya untuk penyebarluasan hasil penelitian yang dilakukan oleh para peneliti dari dalam dan luar Fakultas Teknologi Pertanian Universitas Brawijaya. Jurnal Teknologi Pertanian terbit tiga kali dalam setahun, memuat tulisan hasil penelitian yang termasuk dalam lingkup disiplin ilmu pengetahuan yang terkait dengan Ilmu-ilmu Teknologi Pertanian guna menunjang pengembangan ilmu pengetahuan dan teknologi serta pembangunan nasional.
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Articles 2 Documents
 1 
Search results for , issue " Vol 1, No 3 (2000)" : 2 Documents clear
Technical and Financial Studies For Choosing the Right Method pf Coconut Milk Powder Production : Effect of Tween 80 and Soy Milk Concentration Laksono, S. P.; Kumalaningsih, Sri
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The Physico-cemical organoleptic and financial studies of coconut milk powderprocessed by Foam Mat Drying method were carried out. A randomized block designwith two factors namely Tween 80 (0%;  0,4%; and 1%) as the first factor and dry soybean milk concentrations (0%,  2%,  and 5%) a the second factor was used to run thisexperiment. A multiple atribute was applied to select the best treatment for furtherfinancial studies.  The results implied that the best combination treatment was the use of 0,4% Tween80 and 2% dried soy bean milk which produced a promising dried product havingmoisture content of  5,74%; FFA 0,54%; percentage solubility of 85,48%,  Pay  Back Period 3 years and 3 months,  NPV= Rp. 7.910.389; and  IRR = 67,08.Keyword: technical and financial studies, foam mat drying, and soy milk
The Influence of Wetted Surface of Super Green B Sponge on Temperature, Relative Humidity of Air and Power Efficiency of Blower at Evaporative Cooling System Hawa, La Choviya
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.935 KB)

Abstract

Temperature and relative humidity of air were factors that influenced the evaporativerate of vegetables. The evaporative rate become higher at high temperature and lowrelative humidity.  This is caused by the high gas partial pressure difference between airof storage and vegetables. One method to slow down the metabolism activity of agricultural product was todecrease air temperature and to increase the relative humidity.  Humidifying the air canbe done by spraying water to the unsaturated air stream.  The sensible heat of air wasused to evaporate the water from liquid phase to gas phase, therefore result thetemperature of process became lower than before.  This process called evaporativecooling which its and the mechanism was heat transfer between air and water. The objectives of this research was utilizing evaporative process and knowing theinfluence of wetted surface on temperature, relative humidity and power blower efficiency. This study was performed using seven treatments at evaporative cooling system i.e. :no sponge,1 sponge layer, 2 sponge layer, 3 sponge layer, 1 sponge + water, 2 sponge +water, 3 sponge + water.  The parameters measured were dry bulb and wet bulbtemperatures process, air pressure of fan, temperature and relative humidity of air room,temperature of water from nozel.  To analize the parameters used thermodynamicanalizes without factorial design. The result showed that the thicker wetted surface applied with spraying water thelower temperature gained and the relative humidity become higher.  The greatest temperature decrease in 3 sponge + water treatment was 2.29°C, relative humidity89.09% and the lowest temperature decrease in 1 sponge+water treatment was 1.74°C and relative humidity was 85.27%.  The addition of sponge with spraying water wouldreduce the mass rate of air output from blower and decrease the power blower efficiency. The highest power efficiency in 1 sponge layer treatment was 62.93% and the lowestpower efficiency in 3 sponge + water treatment was 22.57%.Keyword : evaporative coolin, sponge, and humidifying

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