Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . quare inchT = degrees absolute F. This value of cp agrees with the results of experiment byKnoblauch and Mollier. Values of this are shown in Fig. 11 asgiven by Goodenough. The value of the specific heat of other superheated vaporsis given below and these are usually taken as constants althoughthis is not true. SPECIFIC HEATS AT CONSTANT PRESSURE AND KS Superheated ammonia vapor k = Superheated sulphur dioxide k = Superheated carbon dioxide k = Superheated
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . quare inchT = degrees absolute F. This value of cp agrees with the results of experiment byKnoblauch and Mollier. Values of this are shown in Fig. 11 asgiven by Goodenough. The value of the specific heat of other superheated vaporsis given below and these are usually taken as constants althoughthis is not true. SPECIFIC HEATS AT CONSTANT PRESSURE AND KS Superheated ammonia vapor k = Superheated sulphur dioxide k = Superheated carbon dioxide k = Superheated chloroform k = Superheated ether k = If now 1 lb. of liquid at 32° F. is heated and finally changedinto superheated vapor at temperature TSUP. the amount of heatrequired is given by r = 2 + M \cpdt (118) f*Teup. I cpdt J Ttat. The last term is found graphically or analytically for differentpressures and different amounts of superheat and tabulated orplotted in charts so that q may be known. The value of I cpdv may be written as J Teal. (mean cp) (T8up. - T8at) HEAT ENGINEERING. 200 300 Degrees of SuperheatFig. 11.—Specific heat of superheated steam. 500 FUNDAMENTAL THERMODYNAMICS 47 The value of mean cp is given by mean c, I cpdt J- sup. J- sat. The values of mean cp have been compared and plotted in theform of curves by Goodenough. From these curves the tableon p. 48 has been constructed: The volume of this superheated steam is computed by (114)and tabulated or plotted. The heat remaining is Au = q - Ap(v - v)But Au = i - Apv. (109).-. i = q + Apvi = q practically. The entropy of the superheated vapor measured from liquidat 32° F. is >TSU r-dt h f t/ Taat. This last term is found analytically or graphically, but in mostcases these have been tabulated for steam so that values ofs may be found for definite conditions. The various quantities for saturated steam mixtures and super-heated steam may be found and these properties are often madeinto chart
Size: 1201px × 2079px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
