Power calculation from indicator diagram:
For engines with indicator drive or MIP-equipment, we can take the indicator diagram which can be used to find the Mean Indicated Pressure (MIP)[it is the indicated pressure} &[ MEP is the effective pressure available after friction losses in the crankshaft and drive]. from indicator card we obtain area
of the indicator diagram using a planimeter, the length of the atmospheric line. and from the spring constant of indicator we obtain mip=Pi (bar) = Area / ( Length x spring constant ) Mean effective pressure= mip-frictional losses(its independent of load and obtained from manufacturer.) then obtain cylinder constant k =1,30,900Xbore square X stroke(in kw). Multiply it with mip X rpm to get mean Indicated power, with mep X rpm to get Mean effective power or break power
For engines with indicator drive or MIP-equipment, we can take the indicator diagram which can be used to find the Mean Indicated Pressure (MIP)[it is the indicated pressure} &[ MEP is the effective pressure available after friction losses in the crankshaft and drive]. from indicator card we obtain area
of the indicator diagram using a planimeter, the length of the atmospheric line. and from the spring constant of indicator we obtain mip=Pi (bar) = Area / ( Length x spring constant ) Mean effective pressure= mip-frictional losses(its independent of load and obtained from manufacturer.) then obtain cylinder constant k =1,30,900Xbore square X stroke(in kw). Multiply it with mip X rpm to get mean Indicated power, with mep X rpm to get Mean effective power or break power
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