I need help with the empty table, you can use the solved table to answer it.The images are below. Thank you very much! Unit: BTUSurface TypeWallHome Heat Loss Calculation TableUse coldest month of Feb (28 days) average of 20 degree °F outside. Assume inside temperature of the house is 70 °FTable 8-2CeilingWindowIf loss for one day, H = 24 hrsIf we are talking about a D days then H = 24 hrs x D (e.g. During February, H= 24 hrs x 28 days)DoorHL=Heat loss (BTU)= Hv x hoursArea (ft²)In summary heat loss for D days isHL= (A/R) * AT* D days *24 hrsInsulation R-value(from Table 8-1)ΔΤ (°F)Daily (1 day)Loss in BTUSGrand total of all conduction heat losses in BTU Σ28 day monthlost in BTUΣ2 ET 842Window insulation: U-factor and R-value:U-factor measures how well a product prevents heat from escaping a home or building (thermal conductivity). U-factorratings generally fall between 0.15 and 1.20. (See more at: http://www.nfrc.org/windowratings/Energy-ratings.html#sthash.EUkrrint.dpuf)A lower U-factor means a better-insulating window.The more common term R-value refers to the resistance of the window to heat conduction, and it is the inverse of the U-factor (that is, R-value = 1/U-factor). Better windows have high R-values and low U-factors.Determine all surface type of areas in Table 8-1 from the house in figure 1 and calculate R-values with the given U-factor.Surface TypeTable 8-1a) Wallsb) Ceiling (**Assume the ceiling area is the same as rectangular floorarea, A=L x W)c) Total window x 8 ea(argon-filled, double glazed for all windows)d) Total door (insulated steel entry doors) x 2eaSize of area(width x height = ft²)3300 ft^21800 ft^272 ft^228 ft^2U-factor R-values0.060.025Prof. Seo0.350.2016.66402.855

Heat loss (HL) per day through a single building element = AreaArea (A)Resistance (R)×∆T×24 hours…

Answered: Unit: BTU HL = Heat loss (BTU)= Hv x…

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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I need help with the empty table, you can use the solved table to answer it.

The images are below.

Thank you very much!

Unit: BTU
Surface Type
Wall
Home Heat Loss Calculation Table
Use coldest month of Feb (28 days) average of 20 degree °F outside. Assume inside temperature of the house is 70 °F
Table 8-2
Ceiling
Window
If loss for one day, H = 24 hrs
If we are talking about a D days then H = 24 hrs x D (e.g. During February, H= 24 hrs x 28 days)
Door
HL=Heat loss (BTU)= Hv x hours
Area (ft²)
In summary heat loss for D days is
HL= (A/R) * AT* D days *24 hrs
Insulation R-value
(from Table 8-1)
ΔΤ (°F)
Daily (1 day)
Loss in BTUS
Grand total of all conduction heat losses in BTU Σ
28 day month
lost in BTU
Σ
2

ET 842
Window insulation: U-factor and R-value:
U-factor measures how well a product prevents heat from escaping a home or building (thermal conductivity). U-factor
ratings generally fall between 0.15 and 1.20. (See more at: http://www.nfrc.org/windowratings/Energy-
ratings.html#sthash.EUkrrint.dpuf)
A lower U-factor means a better-insulating window.
The more common term R-value refers to the resistance of the window to heat conduction, and it is the inverse of the U-
factor (that is, R-value = 1/U-factor). Better windows have high R-values and low U-factors.
Determine all surface type of areas in Table 8-1 from the house in figure 1 and calculate R-values with the given U-factor.
Surface Type
Table 8-1
a) Walls
b) Ceiling (**Assume the ceiling area is the same as rectangular floor
area, A=L x W)
c) Total window x 8 ea
(argon-filled, double glazed for all windows)
d) Total door (insulated steel entry doors) x 2ea
Size of area
(width x height = ft²)
3300 ft^2
1800 ft^2
72 ft^2
28 ft^2
U-factor R-values
0.06
0.025
Prof. Seo
0.35
0.20
16.66
40
2.85
5

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1. If 1 gallon of oil = 1.4 therm, how many gallons have been wasted by heat loss in Feb? (1 therm = 100,000 BTU)
_____________________________________________________________________________________
2. If $1.30 per therm, how much did you waste from house heat loss in Feb?

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