Estimate the Joule-Thomson coefficient of steam at (i) 3 MPa and 300°°C and (ii) 6 MPa and 500°C.
T3.5MPa=300+2994.3−2978.4h(350°C)−h(300°C)(50)T_{3.5MPa} = \\300+ \dfrac{ 2994.3-2978.4}{h(350°C) -h(300°C)}(50)T3.5MPa=300+h(350°C)−h(300°C)2994.3−2978.4(50)
300+2994.3−2978.43104.9−2978.4(50)=306.3°C300 +\dfrac{2994.3 -2978.4}{3104.9-2978.4}(50) = 306.3°C300+3104.9−2978.42994.3−2978.4(50)=306.3°C
T2.5MPa=300−h(300°C)−2994.3h(300°C)−h(250°C)(50)T_{2.5MPa} = \\300 - \dfrac{h(300°C)- 2994.3}{h(300°C) -h(250°C)}(50)T2.5MPa=300−h(300°C)−h(250°C)h(300°C)−2994.3(50)
300−3009.6−2994.33009.6−2880.9(50)=294.1°C300- \dfrac{3009.6-2994.3}{3009.6-2880.9}(50) = 294.1°C300−3009.6−2880.93009.6−2994.3(50)=294.1°C
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