Free Cooling Calculator

Weather Data for Palo Alto CA: WORK (imported) 0.0902777778 0.1527777778 0.4270833333 0.4958333333

ALL (Imported) 0.375 0.5104166667 0.9555555556 1.3770833333TEMP 32 33 34 35

Hours Work 2 3 10 11 Hours All 9 12 22 33

%Work 0.05% 0.07% 0.23% 0.25%% All 0.10% 0.14% 0.26% 0.38%

Tsupply-TEMP 23 22 21 20 Tsupply-TEMP 36 35 34 33 ALL Heating: 4.34 5.53 9.68 13.83 ALL Cooling:

Work Hearting: 1.9 2.73 8.7 9.11 Work Cooling:ALL Heating: 6.41 8.31 14.8 21.55 ALL Cooling:

Work Hearting: 2.82 4.11 13.3 14.2 Work Cooling:

FREE COOLING ANALYSISBetter by:

Results: 12% CASE 1 <= BEST CASE 2

CASE 1 - Mixed Air System - Patient RoomTsupply 55 Def. F Economiser Range:Supply CFM: 180 CFM

All Hours FactorsCooling 1089.1 X 1.0 =Heating 602.85 X 1.0 =

Work HoursCooling 1654.45 X 1.0 =Heating 367.04 X 1.0 =

CASE 2 - DV - Patient RoomTsupply 68 Def. FSupply CFM: 170 CFM

Work Hours

Cooling 450.36 X 1.0 =Heating 1444.7 X 1.0 =

0.6270833333 1.1416666667 0.91875 0.9409722222 1.53333333331.7277777778 3.3083333333 3.1326388889 3.6145833333 5.1791666667

36 37 38 39 40 15 27 22 22 36 41 79.1 75.1 86.1 124.1

0.35% 0.62% 0.51% 0.51% 0.83%0.48% 0.92% 0.87% 1.00% 1.44%

19 18 17 16 15 32 31 30 29 28

16.32 29.83 26.75 28.86 39

11.8 20.12 15.49 14.58 22.36

25.96 48.52 44.58 49.4 68.75

18.77 32.73 25.81 24.95 39.42

+ 3 - 3 The larger the energy factor the more energy will be used to produce the

needed supply air temperature given the weather conditions for a specificgeographic area. This value is purely used for compairson. The lower the # the

1089.1 greater energy saved due to taking advantage of free cooling.602.85

1691.95 <= Energy Factor for 24/7 7DAY WEEK CASE1654.45 367.04

2021.49 <= Energy Factor for Work Hours (6AM - 6PM)

261.47 2013.92

2275.39 <= Energy Factor for 24/7 7DAY WEEK CASE

450.36 1444.7

1.5472222222 2.0006944444 1.7472222222 2.0118055556 2.63541666676.3861111111 7.0583333333 7.2770833333 8.0694444444 8.4541666667

41 42 43 44 45 37 48 41 48 63

153.1 169.1 174.1 193.1 202.1 0.85% 1.10% 0.94% 1.10% 1.45%1.78% 1.97% 2.03% 2.25% 2.35%

14 13 12 11 10 27 26 25 24 23

44.9 46.05 43.77 44.5 42.34

21.45 25.84 20.37 21.86 26.09

81.79 86.99 86.12 91.7 91.97

39.07 48.81 40.09 45.05 56.67

The larger the energy factor the more energy will be used to produce theneeded supply air temperature given the weather conditions for a specificgeographic area. This value is purely used for compairson. The lower the # thegreater energy saved due to taking advantage of free cooling.

3713.44

4170.45

4.0340277778 2.9944444444 3.5055555556 4.0243055556 3.935416666712.161111111 9.3180555556 10.077083333 11.1125 9.7659722222

46 47 48 49 50 96.1 71 84.1 96.1 94.1

291.2 223.2 241.2 266.2 234.2 2.21% 1.63% 1.93% 2.21% 2.16%3.39% 2.60% 2.81% 3.10% 2.73%

9 8 7 6 5 22 21 20 19 18

54.91 37.41 35.37 33.46 24.53

35.81 23.52 24.38 23.88 19.48

126.76 92.74 95.45 100.07 83.41

82.68 58.31 65.78 71.41 66.24

4.4166666667 4.7354166667 4.5916666667 4.9361111111 5.822916666710.701388889 12.313888889 12.477083333 12.169444444 12.367361111

51 52 53 54 55 106.1 113.1 110.1 118.1 139.1 256.2 295.2 299.2 292.2 296.2 2.44% 2.60% 2.53% 2.72% 3.20%2.98% 3.44% 3.48% 3.40% 3.45%

4 0 0 0 0 17 16 15 14 13

86.18 93.45 88.8 80.94 76.19

70.54 70.77 64.59 64.66 70.72

5.3111111111 4.9805555556 5.3493055556 5.4305555556 5.052777777811.85 9.9833333333 11.190277778 12.190972222 10.167361111

56 57 58 59 60 127.1 119.1 128.1 130.1 121.1 284.2 239.2 268.2 292.2 244.2 2.92% 2.74% 2.95% 2.99% 2.79%3.31% 2.78% 3.12% 3.40% 2.84%

0 0 0 -4 -5 12 11 10 9 8

24.49 25.58

21.55 25.07 67.48 52.06 53.07 52.03 38.65

59.65 51.24 50.1 45.79 37.89

5.8076388889 5.4840277778 4.9333333333 4.4194444444 4.438194444410.547222222 10.308333333 9.0916666667 7.2875 7.4

61 62 63 64 65 139.1 131.1 118.1 106.1 106.1 253.2 247.2 218.2 174.1 177.1 3.20% 3.02% 2.72% 2.44% 2.44%2.95% 2.88% 2.54% 2.03% 2.06%

-6 -7 -8 -9 -10 7 6 5 4 0

31.83 36.25 36.57 32.83 37.1

34.56 38 39.12 39.54 43.93 35.07 29.35 21.59 13.78

38.08 30.76 23.09 16.6

4.5444444444 4.6569444444 4.7138888889 5.4652777778 5.05277777787.1833333333 6.6847222222 6.4152777778 7.0694444444 6.3166666667

66 67 68 69 70 109.1 111.1 113.1 131.1 121.1 172.1 160.1 153.1 169.1 151.1 2.51% 2.56% 2.60% 3.02% 2.79%2.00% 1.86% 1.78% 1.97% 1.76%-11 -12 -13 -14 -15

0 0 0 0 0

39.66 40.25 41.7 49.6 47.48

49.69 55.21 60.88 76 75.22

4.8819444444 4.0104166667 4.0902777778 3.4125 2.85138888896.1458333333 4.9131944444 4.8680555556 4.1416666667 3.4347222222

71 72 73 74 75 117.1 96.1 98.1 81.1 68 147.1 117.1 116.1 99.1 82.1 2.69% 2.21% 2.26% 1.87% 1.56%1.71% 1.36% 1.35% 1.15% 0.96%-16 -17 -18 -19 -20

0 -4 -5 -6 -7

49.31 41.71 43.78 39.45 34.4

77.58 67.65 73.12 63.81 56.32

9.27 11.49 11.76 11.37

15.03 19.18 19.03 18.62

3.2597222222 2.7506944444 2.1736111111 1.9534722222 1.83819444443.8361111111 3.1673611111 2.5694444444 2.3840277778 2.1576388889

76 77 78 79 80 78.1 66 52 46 44 92.1 76.1 61 57 51 1.80% 1.52% 1.20% 1.06% 1.01%1.07% 0.89% 0.71% 0.66% 0.59%-21 -22 -23 -24 -25 -8 -9 -10 -11 -12

40.52 35.07 29.39 28.66 26.71

67.91 60.13 49.52 45.72 45.55

14.58 13.55 12.07 12.41 12.11

24.43 23.23 20.34 19.79 20.65

2.0694444444 1.9722222222 1.6180555556 1.3125 1.3752.3680555556 2.1736111111 1.8472222222 1.5 1.5694444444

81 82 83 84 85 49 47 38 31 33 56 52 44 36 37

1.13% 1.08% 0.87% 0.71% 0.76%0.65% 0.61% 0.51% 0.42% 0.43%-26 -27 -28 -29 -30 -13 -14 -15 -16 -17

30.5 29.41 25.81 21.87 23.25

52.75 52.55 44.06 37.23 40.99

14.4 14.4 13.06 11.4 12.45

24.91 25.73 22.29 19.4 21.94

1.2222222222 1.1041666667 0.7013888889 0.6875 0.55069444441.3194444444 1.2152777778 0.7916666667 0.75 0.6270833333

86 87 88 89 90 29 26 16 16 13 31 29 19 18 15

0.67% 0.60% 0.37% 0.37% 0.30%0.36% 0.34% 0.22% 0.21% 0.17%-31 -32 -33 -34 -35 -18 -19 -20 -21 -22

20.13 19.44 13.14 12.82 11

37.23 34.45 21.86 22.53 18.84

11.04 10.9 7.52 7.48 6.53

20.41 19.32 12.51 13.14 11.18

0.5673611111 0.5277777778 0.4166666667 0.5138888889 0.45138888890.6159722222 0.5972222222 0.4652777778 0.5347222222 0.4791666667

91 92 93 94 95 13 12 10 12 10 14 14 11 12 11

0.30% 0.28% 0.23% 0.28% 0.23%0.16% 0.16% 0.13% 0.14% 0.13%-36 -37 -38 -39 -40 -23 -24 -25 -26 -27

10.56 10.85 8.76 9.8 9.22

19.38 18.39 15.74 19.38 16.56

6.37 6.65 5.44 6.17 5.88

11.69 11.26 9.78 12.2 10.56

0.3611111111 0.3194444444 0.27777777780.3888888889 0.3263888889 0.3125

96 97 98 8 7 6 4346.9 9 7 7 8591.9

0.18% 0.16% 0.14%0.10% 0.08% 0.08%-41 -42 -43 -28 -29 -30

602.85 7.73 6.16 6.31 1089.1

367.04 13.58 12.17 10.68 ###

###4.99 4.02 4.16 261.47

1444.7 8.76 7.94 7.04 450.36