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    Ashrae Dar Es Salaam 2017

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    Frank
    This document provides annual heating, cooling, and extreme weather design conditions for Dar Es Salaam, Tanzania based on data from 1990-2014. It includes monthly average temperatures, precipitation amounts, degree days, and solar radiation levels. The coldest month is July with an average dry bulb temperature of 24.2°F. The hottest month is February with an average dry bulb temperature of 33.2°F. Annual precipitation averages 1145mm and peaks at 1811mm.

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    Ashrae Dar Es Salaam 2017

    Uploaded by

    Frank
    67 views2 pages
    This document provides annual heating, cooling, and extreme weather design conditions for Dar Es Salaam, Tanzania based on data from 1990-2014. It includes monthly average temperatures, precipitation amounts, degree days, and solar radiation levels. The coldest month is July with an average dry bulb temperature of 24.2°F. The hottest month is February with an average dry bulb temperature of 33.2°F. Annual precipitation averages 1145mm and peaks at 1811mm.

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    ASHRAE DAR ES SALAAM 2017

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    This document provides annual heating, cooling, and extreme weather design conditions for Dar Es Salaam, Tanzania based on data from 1990-2014. It includes monthly average temperatures, precipitation amounts, degree days, and solar radiation levels. The coldest month is July with an average dry bulb temperature of 24.2°F. The hottest month is February with an average dry bulb temperature of 33.2°F. Annual precipitation averages 1145mm and peaks at 1811mm.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    67 views2 pages

    Ashrae Dar Es Salaam 2017

    Uploaded by

    Frank
    This document provides annual heating, cooling, and extreme weather design conditions for Dar Es Salaam, Tanzania based on data from 1990-2014. It includes monthly average temperatures, precipitation amounts, degree days, and solar radiation levels. The coldest month is July with an average dry bulb temperature of 24.2°F. The hottest month is February with an average dry bulb temperature of 33.2°F. Annual precipitation averages 1145mm and peaks at 1811mm.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    3/9/2019

    2017 ASHRAE Handbook - Foundamentals (SI)


    DAR ES SALAAM INTL, TANZANIA, UNITED REPUBLIC OF (WMO: 638940)
    Lat:6.878S Long:39.203E Elev:56 StdP: 100.66 Time zone:3.00 Period:90-14 WBAN:99999
    Annual Heating and Humidification Design Conditions
    Humidification DP/MCDB and HR Coldest month WS/MCDB MCWS/PCWD
    Coldest Heating DB to 99.6% DB
    99.6% 99% 0.4% 1%
    Month
    99.6% 99% DP HR MCDB DP HR MCDB WS MCDB WS MCDB MCWS PCWD
    7 18.1 18.9 15.2 10.8 26.7 16.4 11.7 26.1 10.2 27.2 9.4 27.8 0.6 210
    Annual Cooling, Dehumidification, and Enthalpy Design Conditions
    Hottest Cooling DB/MCWB Evaporation WB/MCDB MCWS/PCWD
    Hottest Month to 0.4% DB
    0.4% 1% 2% 0.4% 1% 2%
    Month DB
    Range DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB MCWS PCWD
    1 6.6 33.2 25.6 32.8 25.6 32.2 25.4 26.8 30.7 26.6 30.3 26.2 29.9 5.7 30
    Dehumidification DP/MCDB and HR Enthalpy/MCDB Extreme
    0.4% 1% 2% 0.4% 1% 2% Max
    DP HR MCDB DP HR MCDB DP HR MCDB Enth MCDB Enth MCDB Enth MCDB WB
    26.1 21.6 28.4 25.7 21.1 28.1 25.2 20.5 27.7 84.6 31.1 83.3 30.6 82.2 30.2 32.0
    Extreme Annual Design Conditions
    Extreme Annual
    n-Year Return Period Values of Extreme Temperature
    Temperature
    Extreme Annual WS
    Standard
    Mean n=5 years n=10 years n=20 years n=50 years
    deviation
    1% 2.5% 5% Min Max Min Max Min Max Min Max Min Max Min Max
    9.2 8.4 7.8 DB N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
    WB 14.7 28.8 1.5 1.3 13.6 29.8 12.8 30.5 12.0 31.3 10.9 32.2
    Monthly Climatic Design Conditions
    Annual Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    DBAvg 26.4 28.5 28.4 28.0 26.9 26.0 24.8 24.2 24.3 25.0 26.1 27.1 28.1
    DBStd 1.85 0.99 1.11 1.02 1.08 0.96 0.94 0.86 0.92 0.90 1.06 1.06 1.12
    Temperatures, HDD10.0 0 0 0 0 0 0 0 0 0 0 0 0 0
    Degree-Days HDD18.3 0 0 0 0 0 0 0 0 0 0 0 0 0
    and Degree- CDD10.0 5997 574 515 558 506 496 445 439 443 449 498 513 562
    Hours CDD18.3 2955 316 282 300 256 237 195 181 184 199 239 263 303
    CDH23.3 26816 3523 3141 3074 2083 1718 1286 1180 1248 1582 2084 2557 3339
    CDH26.7 9224 1267 1207 1163 631 514 350 299 333 522 760 938 1241
    Wind WSAvg 3.3 5.1 4.2 2.5 2.5 2.8 3.0 3.3 3.0 2.9 3.1 2.9 4.0
    PrecAvg 1145 82 55 130 270 170 40 29 26 29 66 132 116
    PrecMax 1811 202 192 306 446 396 96 155 95 96 285 425 304
    Precipitation
    PrecMin 665 6 5 36 134 54 2 2 2 2 16 1 3
    PrecStd 331 54 49 72 90 87 32 39 23 29 60 145 72
    DB 33.2 34.1 33.9 33.0 32.0 31.1 30.5 31.1 31.8 32.5 33.2 33.2
    Monthly 0.4%
    Design Dry MCWB 25.5 25.9 25.9 25.7 24.5 23.2 22.4 22.4 22.7 23.9 25.1 25.6
    Bulb and DB 32.8 33.1 33.1 32.0 31.1 30.2 30.0 30.1 31.0 31.9 32.2 32.6
    2%
    Mean MCWB 25.5 25.7 26.0 25.8 24.5 23.0 22.1 22.2 22.5 23.9 24.9 25.5
    Coincident DB 32.1 32.4 32.3 31.2 30.2 29.6 29.2 29.5 30.2 31.1 31.8 32.0
    Wet Bulb 5%
    MCWB 25.4 25.6 25.9 25.6 24.4 22.8 22.0 22.1 22.5 23.8 24.9 25.4
    Temperatures
    DB 31.4 31.9 31.8 30.2 29.8 28.9 28.5 28.8 29.7 30.3 31.0 31.3
    10%
    MCWB 25.4 25.5 25.9 25.4 24.3 22.6 21.9 22.1 22.5 23.6 24.9 25.4
    Monthly WB 26.9 27.2 27.3 27.2 26.2 25.1 24.2 24.2 24.7 25.7 26.5 27.0
    Design Wet 0.4%
    MCDB 31.0 31.2 31.5 30.7 29.3 28.6 28.4 28.2 28.6 29.8 30.6 31.0
    Bulb and WB 26.4 26.6 26.7 26.6 25.8 24.5 23.5 23.5 24.0 25.1 26.1 26.5
    Mean 2%
    MCDB 30.2 30.6 30.6 30.0 29.0 28.0 27.7 27.5 28.4 29.5 30.1 30.2
    Coincident
    5% WB 26.1 26.2 26.5 26.2 25.3 24.0 23.0 23.0 23.5 24.6 25.7 26.2

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    3/9/2019
    Dry Bulb MCDB 29.8 30.1 30.3 29.4 28.5 27.5 27.1 27.2 28.0 29.0 29.5 29.7
    Temperatures WB 25.8 26.0 26.2 25.8 24.9 23.5 22.6 22.6 23.1 24.2 25.4 25.9
    10%
    MCDB 29.4 29.8 29.8 28.9 28.1 27.0 26.6 26.7 27.6 28.4 29.1 29.4
    MDBR 6.6 7.5 8.0 7.0 7.7 8.9 9.5 9.8 10.4 9.4 8.3 7.2
    Mean Daily MCDBR 7.3 8.3 8.7 8.5 8.7 9.8 10.4 10.7 11.0 10.2 9.1 7.7
    5% DB
    Temperature MCWBR 2.3 2.7 2.9 3.3 3.3 3.7 3.9 4.1 3.8 3.5 3.0 2.4
    Range MCDBR 6.7 7.6 8.1 7.6 7.6 8.7 9.8 9.8 10.1 9.2 8.0 7.2
    5% WB
    MCWBR 2.5 2.7 3.2 3.3 3.4 3.7 4.1 4.2 3.8 3.5 3.0 2.4
    taub 0.480 0.485 0.432 0.401 0.402 0.397 0.404 0.406 0.405 0.407 0.407 0.442
    Clear Sky
    taud 2.248 2.243 2.429 2.529 2.504 2.487 2.432 2.417 2.413 2.425 2.457 2.383
    Solar
    Irradiance Ebn,noon 865 860 893 894 866 855 855 878 904 918 925 896
    Edn,noon 147 148 121 105 103 102 110 116 121 122 118 128

    All-Sky Solar RadAvg 5.87 5.84 5.49 4.86 4.73 4.63 4.76 5.09 5.80 6.01 6.01 5.74
    Radiation RadStd 0.34 0.33 0.34 0.37 0.31 0.17 0.13 0.18 0.19 0.21 0.28 0.35
    Years used to calculate the design
    CDDn Cooling degree-days base n°F, °F-day Lat Latitude, ° Period
    conditions
    Standard deviation of daily average
    CDHn Cooling degree-hours base n°F, °F-hour Long Longitude, ° Sd
    temperature, °F
    Mean coincident
    Standard pressure at station
    DB Dry bulb temperature, °F MCDB dry bulb StdP
    elevation, psi
    temperature, °F
    Mean coincident
    Clear sky optical depth for beam
    DP Dew point temperature, °F MCDBR dry bulb temp. taub
    irradiance
    range, °F
    Mean coincident
    Clear sky optical depth for diffuse
    Ebn,noon MCDP dew point taud
    Clear sky beam normal and diffuse irradiance
    temperature, °F
    horizontal irradiances at solar noon,
    Btu/h/ft2 Mean coincident
    Edh,noon MCWB wet bulb Tavg Average temperature, °F
    temperature, °F
    Mean coincident
    Time
    Elev Elevation, ft MCWBR wet bulb temp. Hours ahead or behind UTC
    Zone
    range, °F
    Mean coincident
    Enth Enthalpy, Btu/lb MCWS WB Wet bulb temperature, °F
    wind speed, mph
    Hours Number of hours between 8 a.m.
    Mean dry bulb
    HDDn Heating degree-days base n°F, °F-day MDBR 8/4 & and 4 p.m with DB between 55 and
    temp. range, °F
    55/69 69 °F
    Prevailing coincident wind direction, °,0 Humidity ratio, grains of moisture
    PCWD WS Wind speed, mph HR
    = North, 90 = East per lb of dry air

    2/2

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