Supertargeting

Supertargeting - TOTAL AREA AND NUMBER OF UNITS TARGETING...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
TOTAL AREA AND NUMBER OF UNITS TARGETING
Background image of page 1

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

View Full DocumentRight Arrow Icon
TOTAL AREA TARGETING In this part we will explore ways to predict the total area of a network without the need to explore specific designs. Because A=Q/(U* T ml ), one can calculate the area easily in the following situation. T Q T ml = T H1 T H2 T C1 T C2 (T H1 -T C2 )-(T H2 -T C1 ) (T H1 -T C2 ) (T H2 -T C1 ) ln H
Background image of page 2
TOTAL AREA TARGETING Since area=Q/(U T ml ), the composite curve diagram provides one way of estimating the total area involved. Isolate all regions with a pair of straight line sections and calculate the area for each. Cooling water Heating utility, steam or furnace. A 1 A 4 A 5 A 6 A 3 A 2 The above scheme of heat transfer is called VERTICAL HEAT TRANSFER H T
Background image of page 3

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

View Full DocumentRight Arrow Icon
EXERCISE Calculate the values of Q in each interval and estimate the corresponding area. Use U = 0.001 MW m -2 o C Furnace (300 o C) Obtain the total area estimate Cooling Water 230 180 140 20 250 200 80 40 T= T min Pinch Q 1 Q 2 Q 6 Q 3 Q 4 Q 5 H T
Background image of page 4
COMPOSITE CURVE 0 50 100 150 200 250 300 0 1 02 03 04 05 06 07 08 09 0 Q, MW T, C HOT COLD I II III IV VV I EXERCISE Interval Q T
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

Supertargeting - TOTAL AREA AND NUMBER OF UNITS TARGETING...

This preview shows document pages 1 - 6. Sign up to view the full document.

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