8/3/2019 A AHPCorrect08

1/9

HPCap 3 Ton Input Cells Output Cells Do not type in Output CellsNominal Cooling to Actual Correction Factors

Performance @ Nominal Conditions OAT cfm wb db

TCNom 35.8 kBtu/h TC 1.000 0.998 0.934 NA

SCNom 26.4 kBtu/h SC 1.005 1.000 NA #VALUE!

kWNom 2.97 kW kW 1.002 0.999 0.972 NA

SHRNom 0.74

EERNom 12.1 Btu/w-hr Corrected Cooling Conditions and Performance

Cooling Nominal Conditions Actual Conditions (sea level) Performance @ Actual Conditions

EATNom 95 F OATemp 95 F (outdoor) TCcor 33.4 kBtu/h

cfmNom 1200 cfm AirFlow 1200 cfm (indoor) SCcor #VALUE! kBtu/h

DBNom 80 F DryBulb 75 F (indoor) kWcor 2.89 kW

WBNom 67 F WetBulb 63 F (indoor) SHRcor #VALUE!RHNom #VALUE! % RelHumid ### % (indoor) EERcor 11.5 Btu/w-hr

Heating Nominal Conditions

EAThNom 70 F

CFMhNom 1200 cfm

OAThNom 17 F Corrected Heating Conditions and Performance

HCap17 22.6 kBtu/h OATempH 20 F (outdoor) Hcap 22.1 kBtu/h

kW17 2.76 kW AirFlowH 1200 cfm (indoor) kWheat 2.86 kW

COP17 2.40 InAirTempH 70 F (indoor) COP* 2.3

DefrostPen 3.0% % *COP does not include auxiliary

Cooling Performance Correction of Air-Conditioners and Air-to-Air Heat Pumps - See HVAC SimplifiedInput Requirements in Yellow Cells - Output in Blue CellsThis program corrects the nominal condition cooling performance of the air-conditioners and air-to-air pumps to actual conair flow rate). Values used are those presented in Table 5.3 ofHVAC Simplified. The program can be modified to correctchanging the published nominal capacity, demand and air flow rate values in the 'MgfData' worksheet.

If Macro security level is set at high, this program will result inerrors in the cells [NAME?]. To reset the security level (Office 2003and earlier),1. Close the program.2. Click on "Tools" on the main tool bar, select "Macro", select"Security.3. Reset security level to Medium (recommended) or Low4. Exit Excel5. Re-Open Excel6. Run program

For 2007 Office products, theand the procedure has been cthe "trust" settings:

Open ExcelClick the Office Button (top leClick on "Excel Options" buttClick on "Trust Center"Click on "Trust Center SettingClick on " Enable all macros.Open and Run the programsAn option would be to reset thand,Click on " Disable macros wi

8/3/2019 A AHPCorrect08

2/9

Nominal Heating to Actual Correction Factors

OAT cfm IAT

Hcap 1.01 1.00 1

kWHeat 1.00 1.00 1

heat.

(Kavanaugh, 2006) available from ASHRAE.

dtions (outdoor air temperature, indoor air temperature,the equipment performance of other manufacturers by

erminology "trust" has replaced "security"hanged (as you might expect). To change

t corner of screen)n @ the bottom of the pop-up window

s"."

e trust setting by repeating steps 1 thru 5

th notification"

8/3/2019 A AHPCorrect08

3/9

Input nominal perfomance @ 95F OAT & 80/67F IAT

2 ton 2.5 ton 3 ton 3.5 ton 4 ton 5 ton

Tot Cap (MBtu/h) 24.7 31.2 35.8 43.6 50 57.6

Sen Cap (MBtu/h) 18.3 24.2 26.4 32 35.7 42

Tot Power (kW) 1.9 2.6 2.97 3.51 4.1 5.08

Air Flow (cfm) 800 1100 1200 1300 1400 1700

Heat Cap @ 17F 12.1 19.2 22.6 28.7 31 35.7

kW In @ 17F 1.5 2.5 2.76 3.08 3.31 4.07

8/3/2019 A AHPCorrect08

4/9

EAT TC SC kW

85 37.2 27 2.69

95 35.8 26.4 2.97

105 34.5 25.9 3.31

115 33.3 24.5 3.66

EAT TCcf SCcf kWcf

85 1.039 1.023 0.906

95 1.000 1.000 1.000

105 0.964 0.981 1.114

115 0.930 0.928 1.232

EAT= 95 F

TC= 35.8 MBtu/h

SC= 26.6 MBtu/h

kW= 2.98 kW

50 60 70 80 90 100 110 1

0.800

0.900

1.000

1.100

1.200

50 60 70 80 90 100 110

0

5

10

15

20

25

30

35

40

TC

SC

kW

8/3/2019 A AHPCorrect08

5/9

oat hc kw

57 41.5 3.21

47 36.8 3.1 Err:508

37 26 2.85

27 24.3 2.817 22.6 2.76 1

oat cfHC cfKW

57 1.836 1.163

47 1.628 1.123

37 1.150 1.033

27 1.075 1.014

17 1.000 1.000

20

120

10 15 20 25 30 35 40 45 50 55 60

0.800

1.000

1.200

1.400

1.600

1.800

2.000

AAHP - OAT Correction Factors

cfHC

cfKW

Out Air Temp (F)

CFHC&CFKW

8/3/2019 A AHPCorrect08

6/9

cfm% TCcf SCcf kWcf

85 0.98 0.93 0.98

95 0.99 0.98 0.99

105 1.01 1.02 1.01115 1.02 1.07 1.03

cfm HC kWheat

0.8 0.98 1.05

1 1 1

1.2 1.02 0.96

75 85 95 105

0.85

0.9

0.95

1

1.05

1.1

% Rated Cfm

CorrectionFactor

0.7 0.8 0.9 1 1.1 1.2 1.3

0.9

0.92

0.94

0.96

0.98

1

1.02

1.04

1.06f(x) = -0.23x + 1.23

f(x) = 0.1x + 0.9

8/3/2019 A AHPCorrect08

7/9

115 125

TCcf

SCcf

kWcf

8/3/2019 A AHPCorrect08

8/9

wb TCcf kWcf

61 0.91 0.96

64 0.95 0.98

67 1 171 1.1 1.04

60 65 70 75

70 0.94 0.8

75 1.07 0.95 0.7

80 1.19 1.11 0.82 0.64

85 1.26 0.94 0.8290 1.07 0.98

95 1.2 1.16

iath HC

60 1.02

65 1.01

70 1

75 0.99

iath kWheat

60 0.92

65 0.96

70 1

75 1.04

60 62 64 66

0.8

0.9

1

1.1

1.2

EA Wet Bulb Tem

Corr.Fac

60 65 70 75 80 85

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3f(x) = 0.03x -f(x) = 0.03x - 1.18f(x) = 0.03x - 1.37f(x) = 0.02x - 0.8

60

Linear

Regression for60

65

LinearRegression for

65

db

SCcf

58 60 62 64 66 68 7

0.98

0.98

0.99

0.99

1

1

1.01

1.01

1.02

1.02

1.03

f(x) = 0x + 1.14

58 60 62 64 66 68 7

0.86

0.88

0.9

0.92

0.94

0.96

0.98

1

1.02

1.04

1.06

f(x) = 0.01x + 0.44

kW

8/3/2019 A AHPCorrect08

9/9

68 70 72

TCcf

kWcf

p(F)

0 95 100

.13

70

Linear

Regression for70

75

LinearRegression for

75

0 72 74 76

HC

LinearRegression forHC

0 72 74 76

eat LinearRegression forkWheat