Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 18. -TS d of flu. agram for flowds. Fig. 19.—pV diagram for flow offluids. stead of using %\ — i2 for these points, only a fraction of this isused. In Fig. 18 abcde is equal to i\, since abcf = q cdef = xrabcde = q + xr = i — Ayv = iabg2e = i2i\ — i2 = cd2g This assumes no friction, hence d and 2 have the same experiment the heat used in friction is found to be y(ii — i2),hence this must be subtracted to get the amount of heat left togive the gain in kinetic energy. Hence w
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 18. -TS d of flu. agram for flowds. Fig. 19.—pV diagram for flow offluids. stead of using %\ — i2 for these points, only a fraction of this isused. In Fig. 18 abcde is equal to i\, since abcf = q cdef = xrabcde = q + xr = i — Ayv = iabg2e = i2i\ — i2 = cd2g This assumes no friction, hence d and 2 have the same experiment the heat used in friction is found to be y(ii — i2),hence this must be subtracted to get the amount of heat left togive the gain in kinetic energy. Hence w2 = ^2gJ(i1 - i2){\ - y) (131) i\ and i2 are for points on the same entropy line. In Fig. 18 thearea cd2g is cut down by the amount hd2k which is equal to 58 HEAT ENGINEERING y(ii — ^2). This heat stays in the substance and hence at exit iis not the i of 2 but that of 2 which is fixed by making 2Ve2 = M2fcor22 = ^P 12 If this value of iy could have been determined the originalformula (130) would have been used. It is because iv cannotbe found that this method of using a portion of the amount forisoentropic expa
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
