Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . O CO CO COCO-^iDO iOCOC01>^ Tt^ ^ ^ OOOOrH •^?^•DiD cocomm 00»-l mco OOO OOO OOOOO OOOOO <6oo00O ^f ^4 T^H T^l^ ^ ^ ^ -HCO mm Tf4TjCOOO 1-1 OOOOO(N-* CO tH T-l 1-1 IN OOOO<N-*t^O<N IN <N CO iDOiOOiNiDr»0CO CO CO Tj< mo?*m momo FUNDAMENTAL THERMODYNAMICS 49 starts at 32° F. or ° abs. F. This line is shown as the liquidline in Fig. 12. The various values of s for different values of Tfrom the steam tables are plotted. From points on the liquid line the distances
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . O CO CO COCO-^iDO iOCOC01>^ Tt^ ^ ^ OOOOrH •^?^•DiD cocomm 00»-l mco OOO OOO OOOOO OOOOO <6oo00O ^f ^4 T^H T^l^ ^ ^ ^ -HCO mm Tf4TjCOOO 1-1 OOOOO(N-* CO tH T-l 1-1 IN OOOO<N-*t^O<N IN <N CO iDOiOOiNiDr»0CO CO CO Tj< mo?*m momo FUNDAMENTAL THERMODYNAMICS 49 starts at 32° F. or ° abs. F. This line is shown as the liquidline in Fig. 12. The various values of s for different values of Tfrom the steam tables are plotted. From points on the liquid line the distances ™ for those temperatures are laid off giving the saturation line. It is evident that these two lines approach. p—«r~^ s Fig. 12.—TS diagram for TS analyses. Fig. 13.—TS diagram areas. and meet at the critical temperature (at which the superheated,saturated and liquid states coincide), since at this point r = 0. Sinceand dq = Tdsdq = cdt,ds c=T dt (120) or the specific heat is the subtangent from any point on a curveon the T-S plane. In Fig. 12 it will be seen that while the specificheat of the liquid is positive, the specific heat of saturated steamis negative. The areas beneath lines on which there is no friction areequal to the heat added. As shown in Fig. 13, the area beneath 50 HEAT ENGINEERING the liquid line is q while that beneath the line from the liquid lineto the saturation line is r. It must be remembered distinctlythat steam tables and diagrams assume that steam is madeby keeping the pressure constant, heating the water from 32° the boiling point, boiling to dry vapor and then superheating atconstant pressure. If superheating takes place the temperaturewill rise by the
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
