Analisa Energy Balance Pada Mesin Diesel Empat Tak Man 6L 23/30

Christo P, Stephanus (2016) Analisa Energy Balance Pada Mesin Diesel Empat Tak Man 6L 23/30. Undergraduate thesis, Institut Teknology Sepuluh Nopember.

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Abstract

Energy efficiency of thermal engines is a relationship between the total energy contained in the fuel and the amount of energy that converted to perform a useful work. It is concerned with the transformation of energy from fuels into conveniently used forms such as rotational energy, electrical energy, heating, and cooling. To gain a high efficiency there must be a higher energy converted into a useful work and the energy lost must be decreased. Therefore, the energy balance was made to analyze the distribution of energy inside the engine The distribution of energy from fuel mainly flows to the exhaust gas, cooling system, lubricating oil system, and the most important to the engine crankshaft. Other than that, there are parts energy from fuel that can’t be converted into useful work due to the formation of several substances by chemical reaction and incomplete combustion, which is called chemical losses. Incomplete combustion occurs when there is insufficient oxygen to allow a hydrocarbon fuel source to react completely with oxygen to produce carbon dioxide and water. And it would produce the unburned fuel material and CO gases. Incomplete combustion would decrease the thermal efficiency of the diesel engine. And chemical losses could be an indicator whether one engine is under good performance or not. Other than losses already mentioned above, there is also energy lost due to the formation of NOx. It means there is part of the energy from fuel xii that converted into heat and produces NOx. Thus, it is important to make an energy balance and analyze how big the energy which can be converted into useful work. The project’s approach involved laboratory diesel engine testing and analysis of combustion products inside exhaust gas. The distribution of energy from fuel was measured and calculated to determine the energy balance of diesel engine. And the primary output from this bachelor thesis was detailed energy audit across a variation of engine speed-load conditions. ============================================================================================================ Energi effisiensi dari suatu mesin termal merupakan hubungan antara energi total yang terakndung di dalam bahan bakar berbanding dengan energi yang dikonversi menjadi useful work. Untuk menghasilkan efisiensi yang tinggi dibutuhkan lebih besar energi yang terkonversi menjadi useful work. Maka, energy balance dibutuhkan untuk menganalisa distribusi energi pada suatu mesin. Distribusi energi dari bahan bakar, secara umum, terkonversi ke sistem gas buang, sistem pendingin, sistem pelumasan, dan yang paling utama adalah useful work. Selain itu, terdapat energi yang tidak dapat dikonversikan menjadi usefulwork yang disebabkan karena pembakaran yang tidak sempurna dan juga pembentukan beberapa partikel oleh reaksi kimia. Hal ini disebut chemical losses. Pembakaran yang tidak sempurna umumnya terjadi saat tidak terdapat oxygen yang cukup untuk melaksanakan proses oksidasi dari partikel karbon. Dan proses ini akan menghasilkan unburned material dan juga gas CO. Pembakaran yang tidak sempurna akan mengurangi efisiensi thermal dari suatu mesin. Dan chemical losses dan menjadi suatu indikator apakah suatu mesin berada dalam kondisi prima atau tidak. Laporan ini melibatkan engine test di dalam laboratorium dan analisa produk pembakaran di dalam gas buang. Distribusi xiv energi dari bahan bakar akan diukur dan dianalisa pada beberapa daya mesin untuk menentukan energy balance yang paling optimal. Dan output utama dari laporan ini adalah detil audit energi pada beberapa daya dan putaran mesin.

Item Type: Thesis (Undergraduate)
Additional Information: RSSP 623.872 36 Ste a
Uncontrolled Keywords: Diesel Engine, Energy Balance, Thermal losses, Chemical Losses, Energy Audit
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions: Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 23 Jan 2020 03:39
Last Modified: 23 Jan 2020 03:39
URI: http://repository.its.ac.id/id/eprint/72936

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