Attachment J05 Weather Conditions Gallup NM.pdf

2017 ASHRAE Handbook - Foundamentals (SI)

GALLUP MUNICIPAL, NM, USA (WMO: 723627)

Lat:35.514N Long:108.794W Elev:1972 StdP: 79.77 Time zone:-7.00 Period:90-14 WBAN:23081 Annual Heating and Humidification Design Conditions

Coldest Month

Heating DB Humidification DP/MCDB and HR Coldest month WS/MCDB MCWS/PCWD to 99.6% DB99.6% 99% 0.4% 1%

99.6% 99% DP HR MCDB DP HR MCDB WS MCDB WS MCDB MCWS PCWD

12 -17.4 -14.8 -22.8 0.6 -7.6 -20.5 0.8 -5.7 12.2 4.9 11.0 4.5 0.5 60

Annual Cooling, Dehumidification, and Enthalpy Design Conditions

Hottest Month

Hottest Month

DB

Range

Cooling DB/MCWB Evaporation WB/MCDB MCWS/PCWD to 0.4% DB0.4% 1% 2% 0.4% 1% 2%

DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB MCWS PCWD

7 17.9 33.2 14.1 31.9 13.8 30.7 13.5 16.8 25.5 16.3 25.3 15.8 24.8 4.8 240

Dehumidification DP/MCDB and HR Enthalpy/MCDB Extreme Max

WB

0.4% 1% 2% 0.4% 1% 2% DP HR MCDB DP HR MCDB DP HR MCDB Enth MCDB Enth MCDB Enth MCDB

14.8 13.4 18.2 14.0 12.7 17.8 13.2 12.1 17.9 54.7 25.3 53.0 25.0 51.3 24.9 26.7

Extreme Annual Design Conditions

Extreme Annual WS Extreme Annual Temperature n-Year Return Period Values of Extreme Temperature

Mean Standard deviation n=5 years n=10 years n=20 years n=50 years

1% 2.5% 5% Min Max Min Max Min Max Min Max Min Max Min Max

11.9 10.2 8.5 DB -22.4 35.4 4.1 1.4 -25.3 36.4 -27.8 37.2 -30.1 38.0 -33.1 39.0

WB -22.7 18.6 4.0 1.9 -25.6 20.0 -28.0 21.1 -30.3 22.1 -33.2 23.5

Monthly Climatic Design Conditions Annual Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperatures, Degree-Days and Degree-

Hours

DBAvg 9.5 -1.4 1.1 4.5 8.2 13.3 18.5 21.7 20.5 16.5 9.6 3.1 -1.7 DBStd 8.87 4.16 3.72 3.55 3.64 3.54 3.10 1.92 1.86 2.90 3.72 4.04 4.57

HDD10.0 1484 352 249 171 76 13 1 0 0 1 51 208 363

HDD18.3 3441 610 483 428 305 158 34 1 3 68 271 457 622

CDD10.0 1318 0 0 2 21 115 256 363 327 196 39 1 0

CDD18.3 232 0 0 0 0 2 39 106 72 13 0 0 0

CDH23.3 4819 0 0 1 22 303 1338 1572 1067 462 54 0 0

CDH26.7 1823 0 0 0 1 64 560 704 391 100 3 0 0

Wind WSAvg 3.0 2.3 3.0 3.5 4.3 4.0 3.7 2.9 2.6 2.6 2.6 2.5 2.4

Precipitation

PrecAvg 291 22 17 23 12 14 10 43 53 27 27 24 18 PrecMax 402 66 56 52 51 56 45 91 155 73 94 68 57 PrecMin 138 0 2 0 0 0 0 1 17 1 0 0 1 PrecStd 60 19 12 16 11 15 12 25 31 18 22 18 17

Monthly Design Dry

Bulb and Mean

0.4%

DB 15.1 17.7 22.2 26.1 31.1 34.6 35.2 33.6 30.9 27.0 21.2 15.2

MCWB 5.0 6.0 7.7 10.0 12.5 14.2 14.7 15.1 14.4 11.0 8.2 5.3

2%

DB 12.4 15.2 19.9 23.4 28.3 32.9 33.5 31.9 29.1 25.0 18.7 12.3

MCWB 3.7 4.9 6.7 8.5 10.9 13.2 14.4 14.7 13.3 10.2 6.8 3.9

mconard Text Box

APPENDIX A13_1

Coincident Wet Bulb

Temperatures

5% DB 10.1 12.8 18.0 21.7 26.6 31.4 32.2 30.5 27.8 22.9 16.3 10.0

MCWB 2.8 3.8 5.9 7.6 10.0 12.4 14.3 14.5 12.9 9.3 5.9 2.9

10%

DB 7.6 10.2 15.7 19.8 24.8 30.1 30.8 29.0 26.3 21.0 13.6 7.3

MCWB 1.9 2.7 5.0 6.9 9.5 11.9 14.1 14.5 12.4 8.7 4.9 1.9

Monthly Design Wet

Bulb and Mean

Coincident Dry Bulb

Temperatures

0.4%

WB 6.5 6.8 8.7 10.7 13.3 15.8 17.7 17.8 16.3 13.1 9.0 6.6

MCDB 12.0 14.8 20.3 22.6 27.9 27.9 25.1 25.9 25.5 21.4 18.5 12.1

2%

WB 4.9 5.6 7.3 9.2 11.9 14.9 16.8 17.0 15.4 11.6 7.7 4.9

MCDB 10.4 13.4 18.3 21.9 24.5 27.9 25.4 25.6 24.5 20.3 16.2 10.3

5%

WB 3.4 4.5 6.3 8.2 11.1 13.9 16.3 16.5 14.8 10.5 6.6 3.6

MCDB 8.8 11.3 16.4 20.3 23.3 27.6 25.5 25.2 23.3 19.6 14.6 8.9

10%

WB 2.2 3.3 5.3 7.2 10.3 12.9 15.8 16.0 14.0 9.5 5.4 2.2

MCDB 7.1 9.3 14.5 18.9 22.4 27.4 25.1 24.5 22.0 19.3 12.6 7.1

Mean Daily Temperature

Range

MDBR 16.8 16.2 18.7 19.5 20.2 21.6 17.9 17.0 18.7 19.9 18.7 16.4

5% DB

MCDBR 21.2 21.9 24.3 24.0 23.4 23.4 20.9 20.1 21.2 24.4 24.1 20.7

MCWBR 13.6 13.0 13.0 12.2 10.9 10.4 7.7 6.9 8.9 12.6 14.1 13.2

5% WB

MCDBR 17.9 19.2 21.6 22.2 21.0 21.0 15.9 15.8 16.2 19.7 20.7 18.3

MCWBR 11.8 11.6 11.9 11.5 9.7 9.4 5.3 5.5 8.9 12.6 14.1 13.2

Clear Sky Solar

Irradiance taub 0.235 0.243 0.264 0.282 0.293 0.305 0.349 0.339 0.299 0.278 0.246 0.239 taud 2.651 2.634 2.564 2.500 2.514 2.464 2.433 2.425 2.541 2.566 2.622 2.638

Ebn,noon 1000 1023 1016 1003 989 971 926 932 962 962 976 975 Edn,noon 69 79 94 105 106 111 114 113 95 84 71 66

All-Sky Solar Radiation

RadAvg 3.15 4.06 5.52 6.85 7.72 8.14 6.69 6.20 5.60 4.58 3.47 2.71 RadStd 0.21 0.29 0.33 0.35 0.48 0.39 0.33 0.24 0.25 0.26 0.20 0.21

CDDn Cooling degree-days base n°C, °C-day Lat Latitude, ° Period Years used to calculate the design conditions

CDHn Cooling degree-hours base n°C, °C-hour Long Longitude, ° Sd Standard deviation of daily average temperature, °C

DB Dry bulb temperature, °C MCDB Mean coincident dry bulb temperature, °C

StdP Standard pressure at station elevation, kPa

DP Dew point temperature, °C MCDBR Mean coincident dry bulb temp. range, °C taub Clear sky optical depth for beam irradiance

Ebn,noon Clear sky beam normal and diffuse horizontal irradiances at solar noon, W/m2

MCDP

Mean coincident dew point temperature, °C taud Clear sky optical depth for diffuse irradiance

Edh,noon MCWB Mean coincident wet bulb temperature, °C

Tavg Average temperature, °C

Elev Elevation, m MCWBR Mean coincident wet bulb temp.

range, °C

Time Zone Hours ahead or behind UTC

Enth Enthalpy, kJ/kg MCWS Mean coincident wind speed, m/s WB Wet bulb temperature, °C

HDDn Heating degree-days base n°C, °C-day MDBR Mean dry bulb temp. range, °C

Hours 8/4 12.8/20.6

Number of hours between 8 a.m. and 4 p.m with DB between 12.8 and

20.6 °C mconard

PCWD Prevailing coincident wind direction, °,0 = North, 90 = East

WS Wind speed, m/s HR Humidity ratio, g of moisture per kg of dry air mconard