Chemical Engineering Hand Written_Notes_Part_5

Chemical Engineering Hand Written_Notes_Part_5 - 12 1....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

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

Unformatted text preview: 12 1. MATHEMATICAL MODELING AND SIMULATION LT TT LC FT FC Hot Water Flow Cold Water Flow Steam Flow CV-1 CV-2 CV-3 Level Setpoint Flow Setpoint Valve Position Figure 6. Stitted Tank Heater (STH) System Now, f ow out due to the gravity is also a function of height F = k h Thus, (2.34) A dh dt + k h = F i Total energy of liquid in the tank is given by E = U + k + P However, since tank does not move dk dt = dP dt = 0 ; dE dt = dU dt For liquid systems (2.35) dU dt dH dt where H is total enthalpy of the liquid in the tank. (2.36) H = V C p ( T T ref ) = AhC p ( T T ref ) T ref represents reference temperature where the speci F c enthalpy of the liquid is assumed to be zero. Now, using the energy conservation principle (2.37) d ( AhC p ( T T ref )) dt = F i C p ( T i T ref ) F C p ( T T ref ) + Q 2. MECHANISTIC MODELS AND ABSTRACT EQUATION FORMS 13 where Q is the amount of heat supplied by the steam per unit time. Assuming T ref = 0 , we have (2.38)(2....
View Full Document

This note was uploaded on 11/26/2011 for the course EGN 3840 taught by Professor Mr.shaw during the Fall '11 term at FSU.

Page1 / 2

Chemical Engineering Hand Written_Notes_Part_5 - 12 1....

This preview shows document pages 1 - 2. Sign up to view the full document.

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