Exergy and energy analysis of the Spirulina microalgae blends in a direct injection engine at variable engine loads

2021 ◽  
pp. 1-18
Author(s):  
Nguyen Chi Thanh Thanh ◽  
Ahmad El Askary Askary ◽  
Ashraf Elfasakhany Elfasakhany ◽  
S Nithya
Keyword(s):  
Diesel Engine ◽  
Exergy Analysis ◽  
Fossil Fuel ◽  
Energy Analysis ◽  
Direct Injection ◽  
Experimental Tests ◽  
Exergy Destruction ◽  
Fuel Blends ◽  
Brake Power ◽  
Overall Efficiency

Abstract This paper explores the exergy analysis of the diesel engine with the selected Spirulina Microalgae biooil (SMBO) biodiesel. The adaptability of the biofuels as an efficient replacement to the fossil fuel has to be tested and proved. To estimate the overall efficiency of the engine with the biofuel blends, it is essential to find out the energy conversion capability of the engine. Different fuel blends were taken as B0 (100% diesel), B10 (10% SMBO+90% diesel), B20 (20% SMBO+80% diesel) and B30 (30% SMBOO+70% diesel). All experimental tests were conducted in a naturally aspirated DI engine. The brake power (BP), heat release rate (HRR), exergy destruction, ideal efficiency, actual efficiency, exergy rate and energy rate of the fuel as well as exhaust were measured for all fuel blends. All tests were conducted at different rpm from 0 to 3000 rpm with 500 rpm interval and also at different loads such as 0%, 25%, 50%, 75% and 100% load. The loss of exergy of fuel and thermal was on the rise and noticed in B0, B10, B20 and B30 while the HRR and loss of exergy rate were found in exhaust as more decreasing one in B10, B20 and B30 fuel blends than B0 (pure diesel).

scholarly journals The Differential Impact of Various Injection Pressures on the Exergy of a Diesel Engine Using Biodiesel-Diesel Fuel Blends

2021 ◽  
Vol 14 (1) ◽  
pp. 345
Author(s):  
Mostafa Kiani Deh Kiani ◽  
Sajad Rostami ◽  
Gholamhassan Najafi ◽  
Mohamed Mazlan
Keyword(s):  
Heat Transfer ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
Exergy Analysis ◽  
Direct Injection ◽  
Injection Pressure ◽  
Cylinder Pressure ◽  
Fuel Blends ◽  
Lack Of Information ◽  
Good Agreement

Contrary to energy, exergy may be destroyed due to irreversibility. Exergy analysis can be used to reveal the location, and amount of energy losses of engines. Despite the importance of the exergy analysis, there is a lack of information in this area, especially when the engine is fueled with biodiesel–diesel fuel blends under various injection operating parameters. Thus, in this research, the exergy analysis of a direct-injection diesel engine using biodiesel–diesel fuel blends was performed. The fuel blends (B0, B20, B40, and B100) were injected into cylinders at pressures of 200 and 215 bars. Moreover, the simulation of exergy and energy analyses was done by homemade code. The simulation model was verified by compression of experimental and simulation in-cylinder pressure data. The results showed there was good agreement between simulation data and experimental ones. Results indicated that the highest level of in-cylinder pressure at injection pressure of 215 bars is more than that of 200 bars. Moreover, by increasing the percentage of biodiesel, the heat transfer exergy, irreversibility, burnt fuel, and exergy indicator decreased, but the ratio of these exergy parameters (except for heat transfer exergy) to fuel exergy increased. These ratios increased from 46 to 50.54% for work transfer exergy, 16.57 to 17.97% for irreversibility, and decreased from 16 to 15.49% for heat transfer exergy. In addition, these ratios at 215 bars are higher than at 200 bars for all fuels. However, with increasing the injection pressure and biodiesel concentration in fuel blends, the exergy and energy efficiencies increased.

Characteristics of performance and emissions in high-speed direct injection diesel engine fueled with diethyl ether/diesel fuel blends

Energy ◽  
2012 ◽  
Vol 43 (1) ◽  
pp. 214-224 ◽  
Author(s):  
Dimitrios C. Rakopoulos ◽  
Constantine D. Rakopoulos ◽  
Evangelos G. Giakoumis ◽  
Athanasios M. Dimaratos
Keyword(s):  
Diesel Engine ◽  
Diethyl Ether ◽  
Diesel Fuel ◽  
High Speed ◽  
Direct Injection ◽  
Direct Injection Diesel Engine ◽  
Fuel Blends ◽  
Performance And Emissions

scholarly journals Performance, Emission, Energy, and Exergy Analysis of a C.I. Engine Using Mahua Biodiesel Blends with Diesel

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Nabnit Panigrahi ◽  
Mahendra Kumar Mohanty ◽  
Sruti Ranjan Mishra ◽  
Ramesh Chandra Mohanty
Keyword(s):  
Energy Input ◽  
Exergy Analysis ◽  
Energy Analysis ◽  
Emission Energy ◽  
Exhaust Gases ◽  
Mahua Oil ◽  
Brake Power ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Mahua Biodiesel

This paper presents an experimental investigation on a four-stroke single cylinder diesel engine fuelled with the blends of Mahua oil methyl ester (MOME) and diesel. The performance emission, energy, and exergy analysis has been carried out in B20 (mixture of 80% diesel by volume with 20% MOME). From energy analysis, it was observed that the fuel energy input as well as energy carried away by exhaust gases was 6.25% and 11.86% more in case of diesel than that of B20. The unaccounted losses were 10.21% more in case of diesel than B20. The energy efficiency was 28%, while the total losses were 72% for diesel. In case of B20, the efficiency was 65.74 % higher than that of diesel. The exergy analysis shows that the input availability of diesel fuel is 1.46% more than that of B20. For availability in brake power as well as exhaust gases of diesel were 5.66 and 32% more than that of B20. Destructed availability of B20 was 0.97% more than diesel. Thus, as per as performance, emission, energy, and exergy part were concerned; B20 is found to be very close with that of diesel.

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