Week 3 Q3 (ENGR5003)

Week 3 Q3Exercise sheetCurrent specThird15 min

ENGR5003 Week 3 workshop sheet Q3 (Lecture 9 steam table examples) official answers

In-class examples show: how to check steam tables? Please download the steam tables ('Properties and Steam Tables') from the Moodle and complete the data checking by yourself in workshop.

The in-class examples (Lecture 9 worked example) are:

Formulas you may need

Wet steam: $u = (1 - x)u_f + xu_g$ (and the same for $v$ , $h$ , $s$ ) (on the formula sheet)
Linear interpolation: $\dfrac{y - y_1}{y_2 - y_1} = \dfrac{x - x_1}{x_2 - x_1}$ (learn this, Lecture 9)

(a)
Given $p = 100\ \mathrm{kPa}$ and $u = 2000\ \mathrm{kJ/kg}$ , determine $T$ , $v$ , $h$ , $s$ , $x$ .
x =
T =C
v =m^3/kg
h =kJ/kg
s =kJ/(kg K)
(b)
Given $p = 2250\ \mathrm{kPa}$ and $s = 6\ \mathrm{kJ/kg/K}$ , find $h$ .
h =kJ/kg
(c)
Given $p = 10\ \mathrm{bar}$ and $h = 3000\ \mathrm{kJ/kg}$ , find $T$ .
T =C
(d)
Given $T = 40.3\ ^\circ\mathrm{C}$ and $v = 10\ \mathrm{m^3/kg}$ , find $p$ .
p =kPa