A four stroke 4 cylinder petrol engine, works on constant volume cycle. The initial pressure in the cycle is 1 bar and maximum pressure is limited to 60 bar. Assuming the expansion and compression follows law of = C, and piston speed 600m/min, find the BP developed by the engine. Also assume that the neat addition and rejection takes place at constant volume and exhaust at 1 bar. The diameter of cylinder is 10cm, mechanical efficiency of 75% and compression ratio is 12 1.3 PV
a) The following observations were taken during a trial on a single cylinder 4 stroke oil engine. Duration of trial = 1 hour Fuel consumption = 7.6 kg Total revolutions = 12000 Net brake load = 1.5 kN Brake drum diameter = 1.83 m Total cooling water circulated = 550 kg Inlet temperature of cooling water = 15ºC Outlet temperature of cooling water = 60ºC Temperature of exhaust gases = 300ºC Atmospheric temperature = 20ºC Air consumption = 360 kg Mean effective pressure = 6 bar CV of fuel = 45000 kJ/kg CP for gases = 1 kJ/kg K Bore = 30 cm, stroke = 45 cm Determine : i) Brake power ii) Mechanical efficiency iii) Brake thermal efficiency iv) Draw up a heat balance sheet on hour basis
. A twin-cylinder 2-stroke engine has a swept volume of 150 cm3 . The maximum power output is 19 kW at 11,000 rpm. At this condition, the bsfc is .11kg/MJ and the gravimetric air/fuel ratio is 12:1. If ambient test conditions are 10 C, 1.03 bar and the fuel has a calorific value of 44 MJ/kg, calculate the bmep, the arbitrary overall efficiency and the volumetric efficiency.
A four stroke 4 cylinder petrol engine, works on constant volume cycle. The initial pressure in the cycle is 1 bar and maximum pressure is limited to 60 bar. Assuming the expansion and compression follows law of = C, and piston speed 600m/min, find the BP developed by the engine. Also assume that the neat addition and rejection takes place at constant volume and exhaust at 1 bar. The diameter of cylinder is 10cm, mechanical efficiency of 75% and compression ratio is 12 1.3 PV
Sir in second question there was two stroke engine. So N should be N not N/2.
So the final answer will be approximately 56 kw
a) The following observations were taken during a trial on a single cylinder 4 stroke oil
engine.
Duration of trial = 1 hour
Fuel consumption = 7.6 kg
Total revolutions = 12000
Net brake load = 1.5 kN
Brake drum diameter = 1.83 m
Total cooling water circulated = 550 kg
Inlet temperature of cooling water = 15ºC
Outlet temperature of cooling water = 60ºC
Temperature of exhaust gases = 300ºC
Atmospheric temperature = 20ºC
Air consumption = 360 kg
Mean effective pressure = 6 bar
CV of fuel = 45000 kJ/kg
CP for gases = 1 kJ/kg K
Bore = 30 cm, stroke = 45 cm
Determine :
i) Brake power
ii) Mechanical efficiency
iii) Brake thermal efficiency
iv) Draw up a heat balance sheet on hour basis
Very easy and Basic questions.
. A twin-cylinder 2-stroke engine has a swept volume of 150 cm3 . The maximum power output is 19 kW at 11,000 rpm. At this condition, the bsfc is .11kg/MJ and the gravimetric air/fuel ratio is 12:1. If ambient test conditions are 10 C, 1.03 bar and the fuel has a calorific value of 44 MJ/kg, calculate the bmep, the arbitrary overall efficiency and the volumetric efficiency.
In problem 4 its written that the engine is 4 stroke then why N is used instead of N/2 ( because of two revolutions)?
yeah
Exactly.... Even I had the same thing to ask...
excellent sir but the problem 4 is repeat .....thank u sir.....
plz also upload questions of carborator of ic engine.. as spon as possible..plz
Explain is very good representation sir
Where's the video about performance parameters?
ruclips.net/video/7Snw5rdyT60/видео.html
nice examplnation sir thank u sir so much...
Amazing video thank you
Question 4 is incorrect. the BP value cannot be used in the next step because the formula you are using is for IP.
How to calculate no. Of misfires
very nice sir...
Please send the link of 1st part
Excellent sir
plz add problem on heat balance sheets an important problems
Please upload more videos
Please make more video
gd jobs sir
thankq very much sir
8.34 ????
Sir problems nomber 3 formula IP=pmlan/60 and you write wrong formula Bp=PmLAN/60
*k which is the number of cylinders
And the formula u have listed is in watts
U did 4 no numerical twice ..
Thank you sir
really it is good
Tell me about...watts and killowatts...it's adding the killo term in watt ..it means multiply by 1000 to the watt...
Sir. You divided 1000 to the IP for KW
No clear explaination
Thank u sir