determine the rate of heat transferthrough the wall in Watts and the temperature at the inner and outer surfaces andat the interfaces.k = 0.20 W/m-°C for the 2.5 cm thick plaster wall on the insidek = 0.038 W/m-ºC for the 9.0 cm thick fiberglass insulation layerk = 0.12 W/m-°C for the 1.25 cm plywood layer on the outside.Assume:-the inside room air is 20 °C with convection coefficient of 10 W/m²- ºC, and- the outside air at -20 °C with convection coefficient of 20 W/m²-°C.Plaster WallInsulation122.5 cm9 cmPlywoodoutside34k-1.25 cm

Here is the solution in determining the rate of heat transfer through the wall and the temperatures…

Answered: determine the rate of heat transfer…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A wall of length "L" m and height "H" m is made from a thick bricklayer of 29 cm with thermal conductivity of 0.5 W/mK is subjected to heat transfer due to the outside temperature as 43 oC and inside temperature 28 oC. If the energy loss is 11427 kJ in 9 hours. Determine the Heat transfer rate, Surface Area and Length and Height of the wall, if L = 1.5 H. Solution: i) Heat Transfer Rate (in Joule/Sec) = ii) Surface Area of the Wall (in m2) = iii) Height of the Wall (H in m) = iv) Length of the Wall (L in m) =
Consider a 40 mmx40 mmx 2 mm thick heat spreader with thermal conductivity of 160 W/m-°C. If the temperature difference across its thickness is 2°C, what is the heat transfer rate through it?
an unsisulated 100 mm diameter steam pipe runs for 25 meters inside a room whose walls and air are at a temperature of 25 C. the superheated steam inside the pipe maintains the temperature at the pipe surface at 150 C. if the natural convection heat transfer coefficient of the air outside the pipe is 10 w/m^2 k and the surface emissivity is 0.8, compute for the convection thermal resistance of the air film surrounding the pipe in k/W
Q2/ A plane wall (K =17 W/m.°C ) with (60 mm) thick. Both sides of the wall are insulated with ( 2 cm) layer of insulating material having (K=0.22 W/m.°C ) The heat transfer coefficient, considering convection on both sides of wall are ( 120 and 10 W/m.°C ) respectively. Calculate the heat transfer per unit area if the temperature difference across the wall is (90 °C).
It is designed in such a way that the internal temperature of a commercial heat treatment furnace can reach up to 165 oC. All surfaces of the furnace consist of firebrick (10 cm), insulation material and sheet metal (3mm) from the inside out. Given that the outdoor temperature is 22 oC, the outer sheet will be allowed to go up to 35 oC, which is a temperature that will not disturb in contact with hands. In this case, determine the insulation material thickness to be used. The thermal conductivity coefficient of the insulation material is insulation 0.066 W / m oC, 60 W / m oC for sheet metal and 115 W / m oC for firebrick. Indoor heat transfer coefficient will be accepted as 25 W / m2 oC and 12 W / m2 oC for outdoor environment.
Consider a wall made of Material A that is 4.5m long, 3.0m high, and 0.22m thick. The interior and exterior design temperatures are Too1 and Too2, respectively, the heat transfer coefficients on the interior and exterior surfaces are 10 and 20W / m2 •C. If insulating material is placed on the inside surface of the wall to maintain the temperature shallow from it to T1. Determine the required thickness of the insulating material.
The temperature distribution in a wall (conductivity k=6-W/m2C, thickness L=10-cm) is given as T(x)=(-454 x2+53 x+ 17) (in °C) Assuming unit wall surface area, calculate the rate of heat loss from both sides of the wall in Watt.
A steel pipe with heat transfer coefficient of 42 W/mK contains flowing water. The outer diameter of the pipe is 90 mm and the wall thickness is 3mm. Calculate: i. The heat loss by convection and conduction per meter length of un-insulated pipe when the water temperature is 14°C, the outside air temperature is -10°C, the water side heat transfer coefficient is 30 KW/m^2K and the outside heat transfer coefficient is 20 KW/m^2K. ii. Calculate the corresponding heat loss when the pipe is lagged with insulation having an outer diameter of 200 mm, and thermal conductivity of K = 0.05 W/mK

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS