The Influence of Valve Area, Revolution Speed, and Combustion Chamber Design upon Horse-Power and Thermal Efficiency

1919 ◽  
Vol 13 (2) ◽  
pp. 163-204
Author(s):  
L. H. Pomeroy
Keyword(s):  
Combustion Chamber ◽  
Thermal Efficiency ◽  
Revolution Speed ◽  
Chamber Design ◽  
Valve Area ◽  
Horse Power

scholarly journals Kaji Eksperimental Perbandingan Performa Engine4 Langkah MenggunakanBahan Bakar Hasil Pirolisis Sampah Plastik dan Premium

Jurnal METTEK ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 76
Author(s):  
Marfizal Marfizal ◽  
Sufiyanto Sufiyanto ◽  
Adriyan Adriyan
Keyword(s):  
Performance Measurement ◽  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Alternative Fuel ◽  
Post Treatment ◽  
Quadratic Functions ◽  
Exhaust Manifold ◽  
Stroke Engine ◽  
Horse Power

Penelitian yang dilakukan dalam tulisan ini terkait pengujian performa engine 4 langkah menggunakan bahan bakar hasil pirolisis sampah plastik (BBHPSP) dan dibandingkan dengan bahan bakar standar, yaitu premium. Pengujian dilakukan dengan menggunakan parameter tetap berupa volume bahan bakar (20 cc) dan kecepatan engine pada 4500 rpm yang dijaga konstan. Untuk memetakan performa engine 4 langkah menggunakan kedua jenis bahan bakar divariasikan besar pembebanan di poros keluaran engine. Berdasarkan pengukuran yang dilakukan diperoleh temperatur ruang bakar dan temperatur gas buang di exhaust manifoldmenggunakantermokopel. Hasil ini digunakan untuk menghitung performa engine 4 langkah yang menunjukkan bahwa performa engine 4 langkah dengan BBHPSP masih berada di bawah performa engine dengan premium. Pada penelitian ini diketahui bahwa kerja keluaran, indicated horse power (IHP), dan efisiensi termal engine dengan BBHPSP lebih rendah masing-masingnya dalam rentang 8,0 – 11,7%; 20,8 – 32,1%; dan 9,6 – 17,7% terhadap nilai premium. Akan tetapi, konsumsi bahan bakar spesifiknya lebih tinggi dibandingkan dengan premium yaitu sebesar32,4 – 53,1%. Selanjutnya, hubungan antara konsumsi bahan bakar spesifik dengan kerja keluaran, IHP, dan efisiensi termal memenuhi fungsi kudratik.Secara umum dapat disimpulkan bahwa BBHPSP dapat digunakan sebagai bahan bakar alternatif dengan perlunya proses perlakuan setelah pirolisis selesai dilakukan atau penambahan katalis dalam proses. This research was conducted to determine performance measurement of a four-stroke engine using fuel from pyrolisis procsess of plastic waste (BBHPSP) and gasoline as a standard fuel. The measurements were performed by keeping the fuel volume and engine rotation at constant value at 20 cc and 4500 rpm, respectively. To map the performance of four-stroke engine, it can be achieved by varying the magnitude of load at the output shaft. Temperature was also measured using thermocouple at combustion chamber and exhaust manifold. These measurements were applied to determine the performance of four-stroke engine. It gave the value of four-stroke engine using BBHPSP was lower than the use of gasoline. These values were 8,0 – 11,7%foroutput work, 20,8 – 32,1% for indicated horse power (IHP), and 9,6 – 17,7% for thermal efficiency comparing to the use of gasoline. Meanwhile, the specific fuel consumption of BBHPSP was greater than gasoline about 32,4 – 53,1%. Afterwards, the relation of specific fuel conumption with output works, IHP and thermal efficiency fulfilled the quadratic functions. To conclude, BBHPSP can be used as an alternative fuel for the four-stroke engine by considering a post-treatment or adding a catalyst when producing BBHPSP using pyrolisis proccess.

scholarly journals EXPERIMENTAL ANALYSIS OF THE COMBUSTION CHAMBER COATED WITH Mo AND Al2O3-TiO2 IN A DIESEL ENGINE

2021 ◽  
Vol 55 (4) ◽  
Author(s):  
Murugan Kuppusamy ◽  
Thirumalai Ramanathan ◽  
Udhayakumar Krishnavel ◽  
Seenivasan Murugesan
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Performance Test ◽  
Ceramic Powder ◽  
Specific Fuel Consumption ◽  
Emission Characteristic ◽  
Powder Materials ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency

The effect of thermal-barrier coatings (TBCs) reduces fuel consumption, effectively improving the engine efficiency. This research focused on a TBC with a thickness of 300 µm insulating the combustion chamber of a direct ignition (DI) engine. The piston crown, inlet and exhaust-valve head were coated using air-plasma-spray coating. Ceramic powder materials such as molybdenum (Mo) and aluminum oxide titanium dioxide (Al2O3-TiO2) were used. A performance test of the engine with the coated combustion chamber was carried out to investigate the brake power, brake thermal efficiency, volumetric efficiency, brake specific fuel consumption and air-fuel ratio. Also, an emission-characteristic test was carried out to investigate the emissions of unburned hydrocarbon (HC), carbon monoxide (CO), nitrogen oxides (NO, NO2, NO3) and smoke opacity (SO). The results reveal that the brake thermal efficiency and brake specific fuel consumption show significant increases because of these coating materials. The effect of the Al2O3-TiO2 coating significantly reduces the HC and CO engine emissions.

Impact of Oxidation Inhibitors on Performance and Emission Characteristics of a Low Heat Rejection Engine

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
P.S. Kumar ◽  
S.A. Kannan ◽  
A. Kumar ◽  
K.A.V. Geethan
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Heat Rejection ◽  
Oxidation Inhibitors ◽  
Low Heat Rejection Engine

In this study, for the first time analysis of a low heat rejection engine was carried out along with the addition of oxidation inhibitors. If the combustion chamber components of the engine such as piston, cylinder head, and inlet and outlet valves are insulated with a thermal barrier material, then the engine will be referred as low heat rejection engine. In this study yttria stabilized zirconia was coated on the combustion chamber components for a thickness of about 150 microns. Then the analysis of performance parameters such as brake thermal efficiency and specific fuel consumption and emission characteristics such as emission of carbon monoxide, hydrocarbon and nitrogen oxide was carried out in single cylinder four stroke diesel engine with electrical loading using diesel and pongamia methyl ester as the fuels. The major problem associated with the usage of biodiesels and low heat rejection engine is the increased NOX emission than the normal engine operated with the diesel. This problem has been overcome by the usage of oxidation inhibitors such as ethyl hexyl nitrate (EHN), tert-butyl hydroquinone (TBHQ). The results showed that addition of oxidation inhibitors leads to increase in brake thermal efficiency, reduced specific fuel consumption and reduced NOX emission.

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