find only the followingWhat is the total heat transfer to/from the building? You have to do thermal analysis of a building near an arctic observatory,which has a footprint of 8-mx12-m and height of 4-m and oriented asshown. Because the wind direction and velocities are different on each sidewall, the convection coefficient for each wall and roof are different. They areas follows h North 5 W/m².K, h South24 W/m².K,15 W/m².K, hEasthwest12 W/m².K, and hRoof = 30 W/m².K, where the subscriptindicate the corresponding wall/roof (for example, North is the convectioncoefficient for the North-facing wall). The ambient air temperature is-15°C. The sky temperature is -20°C. The solar irradiation is 350 W/m²,which can be considered to be falling only on the roof and not on the walls.The surface temperature of the building is 10°C. Neglect heat transferthrough the ground. What is the total heat transfer to/from the building?Is the building losing or gaining heat? What is the dominant mode of heattransfer? What is the ratio between the heat transfer rates through the roofand through the North wall? The solar absorptivity is 0.8, the emissivity ofthe wall and roof is 0.7.-===Total: 121463W from bldgIt is losing healDominant & ConvectionRáléo : 5.18WEST12 mSOUTHNORTHEAST4m8m

Given: Area of the roof→Ar=8×12=96 m2 Area of east wall and west wall→Ae=Aw=4×8=32 m2 Area of the…

Answered: find only the following What is the…

Engineering

Mechanical Engineering

find only the following What is the total heat transfer to/from the building?

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

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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

find only the following

What is the total heat transfer to/from the building?

You have to do thermal analysis of a building near an arctic observatory,
which has a footprint of 8-mx12-m and height of 4-m and oriented as
shown. Because the wind direction and velocities are different on each side
wall, the convection coefficient for each wall and roof are different. They are
as follows h North 5 W/m².K, h South
24 W/m².K,
15 W/m².K, hEast
hwest
12 W/m².K, and hRoof = 30 W/m².K, where the subscript
indicate the corresponding wall/roof (for example, North is the convection
coefficient for the North-facing wall). The ambient air temperature is
-15°C. The sky temperature is -20°C. The solar irradiation is 350 W/m²,
which can be considered to be falling only on the roof and not on the walls.
The surface temperature of the building is 10°C. Neglect heat transfer
through the ground. What is the total heat transfer to/from the building?
Is the building losing or gaining heat? What is the dominant mode of heat
transfer? What is the ratio between the heat transfer rates through the roof
and through the North wall? The solar absorptivity is 0.8, the emissivity of
the wall and roof is 0.7.
-
=
=
=
Total: 121463W from bldg
It is losing heal
Dominant & Convection
Ráléo : 5.18
WEST
12 m
SOUTH
NORTH
EAST
4m
8m

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