ABSTRACT
Let us evaluate the thermal factors αv, βp and γt of water for the thermodynamic state characterised by the pressure P1 and the temperature T1.
Diagram P -v of Clapeyron:
• Specific volume v, in m3/kg, of steam as a function of P and T :
Tˆ P
[◦C] [bar]
190 200 210 490 0.01533 0.01439 0.01353 500 0.01573 0.01477 0.01391 510 0.01611 0.01514 0.01427
• Thermodynamic state at point 1: v1 = 0.01477 m3/kg P1 = 200 bar Tˆ1 = 500 ◦C
• Calculate the partial derivatives (∂T/∂P )v, (∂T/∂v)P et (∂v/∂P )T at point l. • Calculate the thermal factors αv, βp and γt at point l.
