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Monthly Natural Gas Consumption

Professor John Toksoy

Group MembersNathan DartAndy KinneyChristian WatnessPaul ThompsonJoe Sullivan

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Table of Calculated and Actual Data

HDD Calculated HDD Published Error Furnace on TimeOn/Off Cycles

CalculatedOn/Off Cycles

from Graph

Difference Between Calculated and Graph

On/Off Cycles˚F ˚F % hours # # #

22-Jan 30.054 30 0.18% 2.028 29 29 0

28-Jan 49.587 48 3.31% 3.973 51 51 0

29-Jan 50.305 50 0.61% 4.010 59 59 0

3-Feb 37.975 37 2.64% 2.559 33 33 0

4-Feb 33.902 35 3.14% 3.217 48 48 0

5-Feb 32.651 32 2.03% 3.638 57 57 0

6-Feb 42.255 41 3.06% 3.350 50 50 0

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HDD Calculated vs. Published The most probable cause of error is the difference in

temperatures between the weather station and the readings taken by the thermocouple on the roof of the house.

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

25.0

35.0

45.0

55.0R² = 0.990101093794415

HDD Calculated vs. Published

HDD Calculated vs. PublishedLinear (HDD Calculated vs. Published)

HDD Published (˚F )

HD

D C

alcu

late

d (˚

F )

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Number of On/Off Cycles

Furnace on Time vs. HDD Calculated

House temperature was not always set to 65 F. Ambient heat on thermocouple located on desk could provide answer for large deviation.

25.0 30.0 35.0 40.0 45.0 50.0 55.00.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

R² = 0.524246820711197

Furnace on Time vs. HDD Calculated

Furnace on Time vs. HDD Calcu-latedLinear (Furnace on Time vs. HDD Calculated)

HDD Calculated (˚F)

Furn

ace

on T

ime

(Hou

rs)

Furnace on Time vs. HDD Published

House temperature was not always set to 65 F. Ambient heat on thermocouple located on desk could provide answer for large deviation.

25.0 30.0 35.0 40.0 45.0 50.0 55.00.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

R² = 0.537091614684592

Furnace on Time vs. HDD Published

Furnace on Time vs. HDD Pub-lishedLinear (Furnace on Time vs. HDD Published)

HDD Published (˚F )

Furn

ace

on T

ime

(Hou

rs)

First Floor Dimensions

Areas Walls Windows Doors 1st Floor Total

N 426.40 107.30 20.45 298.65

S 538.00 131.22 38.42 368.36

E 378.40 0.00 0.00 378.40

W 289.71 0.00 0.00 289.71

First Floor

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Second Floor Dimensions

Areas Walls Windows Doors 2nd Floor Total

N 575.65 75.71 0.00 499.94

S 363.20 16.40 0.00 346.80

E 162.50 0.00 0.00 162.50

W 371.72 0.00 0.00 371.72

Second Floor

Basement Dimensions

Areas Walls Windows Doors Basement Total

N 142.29 10.24 0.00 132.05

S 263.42 0.00 0.00 263.42

E 291.13 0.00 0.00 291.13

W 157.25 0.00 0.00 157.25

Basement

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Total House Dimensions

Areas Walls Windows Doors House Total

N 1144.34 193.25 20.45 930.64

S 1164.62 147.62 38.42 978.57

E 832.03 0.00 0.00 832.03

W 818.68 0.00 0.00 818.68

House Total

R Values

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R values for walls, windows, and doors shown on right.

Walls include R values of gypsum board, insulation, and either brick or cedar siding.

R-Value

Walls 5.045

Windows 3.85

Doors 1.25

Total Heat Loss For House

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Date Ave T-Out Delta THeat Loss from

WallsHeat Loss from

WindowsHeat Loss from

DoorsTotal Heat Loss

22-Jan 30.05 31.93 25060.85 2827.07 1503.71 29391.62

28-Jan 15.41 49.39 38764.65 4372.97 2325.96 45463.58

29-Jan 14.69 50.79 39863.47 4496.92 2391.90 46752.29

3-Feb 28.12 37.97 29801.45 3361.85 1788.15 34951.45

4-Feb 31.09 35.68 28004.10 3159.09 1680.31 32843.50

5-Feb 32.34 37.39 29346.23 3310.49 1760.84 34417.56

6-Feb 22.74 46.10 36182.43 4081.67 2171.03 42435.13

House Heat Loss The following information was found with the

provided house heat loss excel file.

Month Heat Loss BTU/hrHeat Loss Therms

December 135636.69 1009.14January 167080.49 1243.08

February 139429.52 936.97March 63114.84 469.57

House Heat Loss

Recommendations

For project Provide blue print of house in question

To Reduce House Heat Loss Increase Insulation Add door sealers Insulate Attic

Questions?

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