Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Preliminary Drying of Oil Palm Fronds Using Concentrated Solar Thermal Power

Taha Ellakany, Farid Fawzy Fathy (2011) Preliminary Drying of Oil Palm Fronds Using Concentrated Solar Thermal Power. Universiti Teknologi Petronas. (Unpublished)

[img] PDF
Download (3704Kb)

Abstract

Biomass is an important renewable energy source. Malaysia has a great potential for biomass stock and especially oil palm wastes. The fact that oil palm fronds contain high moisture content makes it unsuitable to be used directly as a biomass fuel, neither for direct combustion nor gasification. In addition, conventional and costly drying methods make the fronds a non-attractive fuel. The objective of this paper is to fmd a cheap, sustainable and efficient way of drying oil palm fronds. A new design is proposed that utilizes concentrated solar thermal energy for drying the biomass. A solar dryer rig has been designed and fabricated. The system's target is to maximize the thermal energy received into the system and to minimize energy loss out of it. The rig consists of three main components. A 49 inch Fresnel lens with a concentration ratio of 8 is used for concentrating the solar energy onto a receiver. The second component is the lens holder that provides the needed elevation for the lens according to the required temperature inside the drying chamber, having the maximum temperature at an elevation equals to the focal length. The third component is the drying chamber. It consists of a sheet of aluminum painted in black and a glazing made of 12 mm acrylic sheets. The aluminum sheet which acts as the receiver is designed to receive solar radiation at different times of the day; thus eliminating the need for a sun tracking system. The glazing is used for trapping the heat energy inside the drying chamber, and minimizing conduction of the heat to the surrounding environment. The chamber contains perforations in order to provide air flow inside the chamber; for a faster removal of humidity. Experiments have been performed on samples of oil palm fronds at a drying temperature not exceeding ll ooc; in order not to affect the organic material of the biomass. Results have been compared with another experiment that used an electric oven for drying at the same temperature. Using the proposed system, the samples were completely dried in 6.5 hours with an average efficiency of 55.4%, compared to 10.5 hours when using the electric oven. The proposed system achieved an average drying rate of 4.75 g/hr compared to an average drying rate of2.83 g/hr using the electric oven. These results were achieved since relative humidity value inside the drying chamber was lower compared to that inside the oven. One drawback of dependence on the weather. Cloudy conditions affect the results severely. It is recommended to combine another source of heating to the current one. By converting the proposed system into a hybrid one the problem of inconsistent solar radiation will be reduced.·

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Energy - Sustainable energy - Geothermal
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 09 Oct 2013 11:07
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/8332

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...