engr2010-f11-hw06 - ENGR 2010 Thermodynamics I: HW Set 6,...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ENGR 2010 Thermodynamics I: HW Set 6, Due Thursday 10/6 The next topic in SSSF CV analysis will deal with devices that have multiple inlets and/or outlets: Sec. 4 in chapter 5 of the text. Mass conservation for such devices states that the net mass flow rate into the CV will equal the net mass flow out. Say the CV has N inlets and M outlets, then ∑ N inlets ˙ m i,in = ∑ M outlets ˙ m i,out Neglecting KE and PE, the first law for this device will appear as ˙ Q- ˙ W = ∑ M outlets ˙ m i,out h i,out- ∑ N inlets ˙ m i,in h i,in The common devices in this category are mixing chambers and two fluid heat exchangers . 1 2 3 1h 2c 2h 1c mixing chamber two fluid heat exchanger A mixing chamber typically takes two streams and mixes them together. The device, as a whole, can be considered adiabatic. There is no CV work, and ki- netic energies can be neglected. The entire device is also typically taken to operate at a constant pressure, so that P 1 = P 2 = P 3 . Mass conservation has....
View Full Document

This note was uploaded on 09/24/2011 for the course ENG 2010 taught by Professor Staff during the Fall '11 term at Auburn University.

Ask a homework question - tutors are online