DAVIS. A rO, PLANE FOR THERMODYNAMIC CYCLIC ANALYSIS. G49 



F equations, when solved for Q, involve 7^, in an additive constant, so 

 that the effect of changing it is to shift the whole P Q plane along the 

 Q axis without distortion ; the curves of Figures 8 and 9 may be used for 

 the general case provided only that all readings of Q are increased or 

 decreased by a suitable constant. The efficiency equations for types B 

 and (7, when solved for Q^ involve T„ as a factor, so that the curves of 

 Figures 11 and 17 can always be used by multiplying values of <? by a 

 p 



o ol I o| I ol I ' o] 1 ol I I oT \ il I o 



COOOOO O O Q O 



50 



100 



150 



350 



400 



450 500 



Q in BTU 



200 250 300 



Figure 15. 

 Tjipe C. Velocity. The velocity which a regenerative cycle produces depends 

 only on the "quality of the mixture." (Cf. Figures 4 and 9.) 



suitable constant. And in the other cases, the dependence upon T^, 

 while slightly less simple, can be easily followed out. None of the re- 



TABLE 2. 



Isothermal. 

 Pa Ta P Q 



Regenerative. 

 /'. T^ P Q 



