Old spec Tutorial 1 Problem 10 (ENGR5003) - Revisica

Old spec Tutorial 1 Problem 10TutorialOld spec ENGR2172:215 min

ENGR217 (old spec) Thermo L6 Tutorial 1, Problem 10 official answers

Wet steam is heated in a vertical cylinder, closed at the top by a moveable piston. Initially the cylinder contains 0.01 $\mathrm{m^3}$ of liquid and 0.19 $\mathrm{m^3}$ of vapour in equilibrium at 700 kPa. Heat is transferred at constant pressure until a temperature of 325 C is reached.

Formulas you may need

Mass of each phase: $m_f = V_f/v_f$ , $m_g = V_g/v_g$ (learn this)
Superheated steam table and linear interpolation (in $T$ and in $p$ ) (learn this, Lecture 9)

(a)
What is the initial temperature of the water?
T1 =C
(b)
Determine the total mass of water.
m =kg
(c)
Determine the final volume.
V2 =m^3
(d)
Show the process on a p-v diagram with respect to the saturation lines.

Related questions

Lecture 6 worked example 3 - R134a capillary-tube throttling steady-flow, throttling, r134a, dryness-fraction, isenthalpic
Lecture 8 examples - linear interpolation in the saturation table real-gas-steam, steam-tables, interpolation
Lecture 8 example - double interpolation in the superheated table real-gas-steam, steam-tables, interpolation, superheated-steam
Old spec L5 worked example 1 - boiling water at constant pressure real-gas-steam, steam-tables, boundary-work, first-law, closed-vs-open-system
Old spec L5 worked example 2 - heating wet steam in a rigid tank real-gas-steam, steam-tables, rigid-tank, dryness-fraction, interpolation
Old spec L5 worked example 3 - isentropic expansion of dry steam, closed vs open real-gas-steam, steam-tables, isentropic-expansion, closed-vs-open-system, dryness-fraction
Lecture 13 worked example 1 - ideal Rankine cycle gas-turbines, rankine-cycle, steam-tables, t-s-diagram, back-work-ratio, thermal-efficiency
Old spec L7 worked example - isochoric / isentropic / isothermal cycle ideal-gas-first-law, second-law, p-v-diagram, thermal-efficiency, entropy-change, isothermal-compression