SPSolution20-21

SPSolution20-21 - Naik, Sameer V. Solution for Special...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Naik, Sameer V. Fall 2009 1000 Solution for Special Problem 20 Given: - Insulated mixing chamber to heat liquid water Find: - Mass flow rate (kg/min) of steam - Velocity (m/s) of water at the exit of the mixing chamber System: Assumptions: - Steady state steady flow - Insulated no heat transfer - No work interaction - Negligible changes in kinetic and potential energy Basic Equation(s): .. . . . 12 3 0 CV ie inlets exits dm mm m m m dt ⎛⎞ =−⇒ = + ⎜⎟ ⎝⎠ ∑∑ 22 . . . 11 2 2 33 0 CV i e CV i i e e CV inlets exits dE Q W m h gz m h gz dt mh mh mh ∀∀ =−+ + + + + ⇒= + . mA ρ =∀
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Naik, Sameer V. Fall 2009 1000 Solution: (a) At inlet 1, P 1 = 3 bar ( T sat = 133.6 ° C) T 1 = 20 ° C < T sat sub-cooled (compressed liquid). We can approximate the enthalpy at inlet 1 as: () () () [] 3 3 11 1 1 1 kJ m 83.96 1.0018 10 300 2.339 kPa kg kg ff s a t hhT vTPPT ⎡⎤ =+ = ⎣⎦ , i.e., 1 kJ 84.26 kg h = . At inlet 2, P 2 = 3 bar ( T sat = 133.6 ° C) T 2 = 320 ° C > T sat superheated vapor. Using Table A-4, 2 kJ 3110.1 kg h = . At the exit 3, P 3 = 3 bar ( T sat = 133.6 ° C) T 3 = 90 ° C < T sat sub-cooled (compressed liquid).
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

SPSolution20-21 - Naik, Sameer V. Solution for Special...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online