PENGARUH VARIASI DIMENSI TEMPURUNG KELAPA TERHADAP ENERGI GAS MAMPU BAKAR YANG DIHASILKAN PADA PROSES GASIFIKASI MENGGUNAKAN REAKTOR UPDRAFT

ISKANDAR, CHANDRA and Sipahutar, Riman (2016) PENGARUH VARIASI DIMENSI TEMPURUNG KELAPA TERHADAP ENERGI GAS MAMPU BAKAR YANG DIHASILKAN PADA PROSES GASIFIKASI MENGGUNAKAN REAKTOR UPDRAFT. Undergraduate thesis, Sriwijaya university.

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Abstract

the primary energy source is non-renewable energy category, we need to look for the other altemative energy source that we can use. Biomass is one of several altemative energy that we can use with raw materials that can be easily obtained. Coconut is one of the important agricultural commodity in the construction sub-sector plantations, coconut can be used as a feedstock in gasification. The gasification process is a change in thermochemical solid fuel into gas, where the necessary air is lower than the air used for combustion processes. During the gasification process, the main Chemical reaction that occurs is endothermic (requires extemal heat during the process). The most common medium used in the gasification process is air and steam. The gas produced from the gasification using air has a lower calorific value but on the other hand the operation process is simplified. The present study uses an updraft gasifier where this type is the simplest type by using the air supply from below with gas out of the top results. The combustion process occurs in the grate, followed by a reduction process. At the top of the gasifier, the heating and pyrolysis processes occur due to heat transfer from the bottom by convection and radiation. Tar and volatiles generated in this process will be carried in the gas stream. The main advantage of this type of updraft gasifier is a simple design, charcoal with a high calorific value, high-efficiency equipment, and raw materials are used in a variety of operations, such as sawdust, palm shells, coconut shells, etc. The main drawback updraft gasifier, the possibility of leakage of oxygen from the gasifier, it is very dangerous because tar is highly flammable and explosive. In the gasification process obtained the value of the energy generated fuel gas capable of a peak of 117,209 kJ/kg by using a variation of the dimensions of most small coconut shell that is 3 cm x 3 cm. This is because the smaller the size of the fuel used will produce a fuel gas capable of a longer and stable, so that more heat can be absorbed by the water in the test. For coconut shell dimension 15 cm x 15 cm obtained fuel flow rate value of the lowest which is equal to 3,471 kg/h, due to the greater size to make the distance between the greater fuel causing longer fuel runs out. Seen in a coconut shell with dimensions 3 cm x 3 cm with a flow rate of high fuel amounted to 7.599 kg/h. XI The value of the air-fuel ratio (AFR) coconut shell dimension 15 cm x 15 cm which is 6.491 greater than the value of the air-fuel ratio of stoichiometric (AFRs) of 5.419. So the process that occurs is not included in the gasification process, but the combustion process. Keywords : biomass energy, gasification, updraft, coconut shell. Citations: 14 (1979-2015)

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	energi biomassa, gasifikasi, updraft, tempurung kelapa
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ163.26-163.5 Energy conservation
Divisions:	03-Faculty of Engineering > 21201-Mechanical Engineering (S1)
Depositing User:	Ichlasyah Aisyah
Date Deposited:	26 Aug 2025 03:39
Last Modified:	26 Aug 2025 03:39
URI:	http://repository.unsri.ac.id/id/eprint/183279

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