ENGINEERING FUNDAMENTALS
ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 11, Problem 44P
To determine

Find the heat-transfer rate through the door.

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Calculate the total heat loss from a house measures L×w in plan. The height of walls is H. The house has front and bake external doors, the area of each door is A1m2, and four glass windows with total area of A2m2 the U-value of building elements as the following:  Assume the specific heat capacity of air is CpJ/m3I and the air is changed once per hour.  The design internal temperature is T1°C and external temperature is T2°C. Assume the value of N as 0.6. Where  Qf =Σ (U×A×ΔT) watt Qv= (Cv×N×V×ΔT)÷3600 watt
100°? air flows through a round aluminum tube of ID 60mm and OD 80mm at 4 ?? .The tube is covered in 5mm thick fiberglass insulation. The tube is surrounded by RT air flowing at 5?? over the outside of the insulation. What is the heat rate through the wall of the tube? Assume that the air temperature is constant throughout the tube. Note: RT is 25 celsius
H.WII Cooling Load Estimation An air conditioned room in the Basra city that measures 3 m wide, 3.5 m high and 6 m deep. The window size 1.5 m*1.5 m, mounted on the wall with no external shading and the door size 2m*1m. Calculate the sensible, latent and total heat gains on the room. What is the required cooling capacity? Assume all specification parameters that must be taken into account when calculating cooling load. 6 m 2 *1 m 3 m 1.5 * 1.5 m NW NE LNL E ESE SSW SSF SW SE

Chapter 11 Solutions

ENGINEERING FUNDAMENTALS

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