tag:blogger.com,1999:blog-2987621616345501446.post7019727977863854802..comments2019-03-20T15:11:46.794+05:30Comments on Marinesite: What is Indicated Power, Shaft Power And Break Power calculation formulaSreelekshmi Mnoreply@blogger.comBlogger11125tag:blogger.com,1999:blog-2987621616345501446.post-69944378238681488022018-11-19T23:49:58.656+05:302018-11-19T23:49:58.656+05:30From the textbook Elements of Thermodynamics and H...From the textbook Elements of Thermodynamics and Heat Transfer, 2nd ed., by Obert and Young, p. 93, we read<br />ihp = P*L*A*N/33000<br />where<br />ihp = indicated horsepower<br />P = indicated mean effective pressure (imep), psi<br />L = stroke length, inches<br />A = piston area, inches^2<br />N = number of cycles per minute<br />When we examine the units of P*L*A*N, it is clear that<br />P*LDr.Dhttps://www.blogger.com/profile/18360786634583725263noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-32415996917280924132018-11-19T21:57:35.272+05:302018-11-19T21:57:35.272+05:30PkPlea anyone can tell about how we get 4560.86 va...PkPlea anyone can tell about how we get 4560.86 valuSatish Kumar Sivakotihttps://www.blogger.com/profile/07439946257917116529noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-29220586382419852332017-11-25T12:31:59.650+05:302017-11-25T12:31:59.650+05:30nicely explained dr. Dnicely explained dr. DBijoy chandrasekharhttps://www.blogger.com/profile/15805228736169635339noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-84926050815576879982017-11-25T12:15:20.886+05:302017-11-25T12:15:20.886+05:30can you please explain from where you get the valu...can you please explain from where you get the value 4560.86?Bijoy chandrasekharhttps://www.blogger.com/profile/15805228736169635339noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-91753248405618046862017-11-02T19:05:27.385+05:302017-11-02T19:05:27.385+05:30Would Mr. Bob Olik explain the difference he sees ...Would Mr. Bob Olik explain the difference he sees between power at the piston head and indicated power, please? I think that they are the same.<br /><br />Also, where does the divisor 4560l.86 come from? A derivation of his formula would be helpful.Dr.Dhttps://www.blogger.com/profile/18360786634583725263noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-56172775019349730602017-11-02T14:28:59.905+05:302017-11-02T14:28:59.905+05:30The formula you gave above is for work done on the...The formula you gave above is for work done on the piston head and not indicated horsepower. The actual for for indicated horsepower is i.h.p = (PmLAN)/4560.86.<br />Thanks.Bob J Olikhttps://www.blogger.com/profile/16985009964880671358noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-62360996433704410222017-08-16T20:15:06.507+05:302017-08-16T20:15:06.507+05:30Let me expand a bit on the previous answer.
Consi...Let me expand a bit on the previous answer.<br /><br />Consider first the concept of shaft power, either in Hp or in W. To calculate shaft power (SP), you need to know the torque (T) and the shaft speed (w), the latter in radian/sec. To get the shaft speed, w ---<br />w = (2*pi/60)*(rpm) [rad/s]<br />and shaft power is<br />SP = w * T<br /> [=] (rad/s)*(ft-lb) = ft-lb/s<br />or<br /> [=] (rad/sDr.Dhttps://www.blogger.com/profile/18360786634583725263noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-17255196181715977452017-08-16T19:03:16.756+05:302017-08-16T19:03:16.756+05:30In most contexts, brake Hp and shaft Hp are unders...In most contexts, brake Hp and shaft Hp are understood to be the same quantity.Dr.Dhttps://www.blogger.com/profile/18360786634583725263noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-47300506283418034712017-08-16T08:16:35.379+05:302017-08-16T08:16:35.379+05:30Is brake power and shaft power the same?Is brake power and shaft power the same?Angelo Cadapanhttps://www.blogger.com/profile/16843168463665575251noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-56345262894278171022017-06-10T22:51:55.725+05:302017-06-10T22:51:55.725+05:30thkz for your valuable correction... thkz for your valuable correction... Bijoy chandrasekharhttps://www.blogger.com/profile/15805228736169635339noreply@blogger.comtag:blogger.com,1999:blog-2987621616345501446.post-46942152821594337052017-06-08T22:44:40.138+05:302017-06-08T22:44:40.138+05:30There is one error that occurs several times, and ...There is one error that occurs several times, and it is due to a language misunderstanding. The presentation above talks about BREAK horsepower, but the proper term is BRAKE horsepower.<br /><br />The word BREAK refers to dividing something into two or more parts. Thus, we break a stick into two parts. The word BRAKE refers to retarding or stopping a motion. A brake is used to load an engine in Dr.Dhttps://www.blogger.com/profile/18360786634583725263noreply@blogger.com