In this study, three fins with rectangular shapes have been mounted within an elliptic enclosure ... more In this study, three fins with rectangular shapes have been mounted within an elliptic enclosure to create a new thermal system. Numerical method for analyzing discharging of PCM inside the mentioned geometry has been scrutinized. With neglecting the low amount of velocity for liquid phase, the mathematical model has been derived for this problem. The conduction has a main role in solidification and loading nanoparticles within water can lead to better performance. Concentration and shapes of powders were active parameters of modeling. Low deviation of outputs with the previous article indicated good accuracy of modeling. With an augmenting shape factor, the period declines less than 7 % and augmenting concentration can reduce the period by about 26.81 %. The period for cases with water as PCM is 1.36 times bigger than that of NEPCM. The shortest period takes 728.16 s to reach full solidification.
This paper aims it finding the effect of increase of the ambient air temperature before entering ... more This paper aims it finding the effect of increase of the ambient air temperature before entering the naturally aspirated diesel engine on specific fuel consumption. The experimental investigation was carried out on a diesel engine four strokes, water cooled and indirect injection. The experiments covered all tests. The tests included heating of the inlet air temperature by designing an electric heater then increasing the air temperature entering into the diesel engine. The results showed that brake specific fuel consumption increased with increasing inlet air temperature. Also the results showed that the brake specific fuel consumption decreased with increasing the brake mean effective pressure. Experimental data obtained in this work were compared with other references were found to be in good agreement with experimental results.
In this study, three fins with rectangular shapes have been mounted within an elliptic enclosure ... more In this study, three fins with rectangular shapes have been mounted within an elliptic enclosure to create a new thermal system. Numerical method for analyzing discharging of PCM inside the mentioned geometry has been scrutinized. With neglecting the low amount of velocity for liquid phase, the mathematical model has been derived for this problem. The conduction has a main role in solidification and loading nanoparticles within water can lead to better performance. Concentration and shapes of powders were active parameters of modeling. Low deviation of outputs with the previous article indicated good accuracy of modeling. With an augmenting shape factor, the period declines less than 7 % and augmenting concentration can reduce the period by about 26.81 %. The period for cases with water as PCM is 1.36 times bigger than that of NEPCM. The shortest period takes 728.16 s to reach full solidification.
This paper aims it finding the effect of increase of the ambient air temperature before entering ... more This paper aims it finding the effect of increase of the ambient air temperature before entering the naturally aspirated diesel engine on specific fuel consumption. The experimental investigation was carried out on a diesel engine four strokes, water cooled and indirect injection. The experiments covered all tests. The tests included heating of the inlet air temperature by designing an electric heater then increasing the air temperature entering into the diesel engine. The results showed that brake specific fuel consumption increased with increasing inlet air temperature. Also the results showed that the brake specific fuel consumption decreased with increasing the brake mean effective pressure. Experimental data obtained in this work were compared with other references were found to be in good agreement with experimental results.
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