weatherNextHour

title: weatherNextHour ---

  • wd_sunupf, wd_slAzm, wd_slAlt MUST BE BEFORE wd_db
  • wd_db assumed 1st non-solar geometry mbr
  • re preservation of solar geometry info, see Copy()
Name Type Variability Description/Comments
sunupf number Start of hour
  • fraction of hour if sun is up
  • solar position at midpoint of hour (or portion of hour sun is up)
slAzm number Start of hour azimuth, radians (0=N, +clockwise)
slAlt number Start of hour altitude, radians (0=horizon, +upwards)
Name Type Variability Description/Comments
db number Start of hour air dry bulb temp, deg F
wb number Start of hour air wet bulb temp, deg F
Name Type Variability Description/Comments
DNI number Start of hour direct normal irradiance from weather file (integrated value for hour, Btu/ft2)
DHI number Start of hour diffuse horizontal irradiance from weather file (integrated value for hour, Btu/ft2)
bmrad number Start of hour DNI as adjusted per anisotropic sky, Top.radBeamF, etc (integrated value for hour, Btu/ft2)
dfrad number Start of hour DHI as adjusted per anisotropic sky, Top.radDiffF, etc (integrated value for hour, Btu/ft2)
Name Type Variability Description/Comments
wndDir number Start of hour wind direction, deg, 0=N, 90=E
wndSpd number Start of hour wind speed, mph
Name Type Variability Description/Comments
glrad number Start of hour global irradiance on horizontal surface, for daylighting calculations
cldCvr number Start of hour total cloud cover in tenths, 0-11, or 15 for missing data
Name Type Variability Description/Comments
irHoriz number Start of hour
  • horizontal infrared sky radiation (integrated value for hour, Btu/ft2)
  • available for epw files only
  • used to calc Top.tSkyHr iff Top.[skyModelLW][skymodellw] == C_SKYMODLWCH_IRHORIZ
tSky number Start of hour
  • default sky temperature, F from weather file or CalcSkyTemp() (Berdahl-Martin)
  • Note: Top.tSkyHr alternative value per Top.[skyModelLW][skymodellw]
tGrnd number Start of hour ground temperature, F
taDp number Start of hour air dew point temp, F
tMains number Start of hour
  • cold water mains temp, F
  • computed using CEC ACM method
  • time-of-day fuel values, units = TDV/Btu
  • values are read from optional TDV file
Name Type Variability Description/Comments
tdvElec number Start of hour electricity
tdvFuel number Start of hour fuel
  • derived (computed) drybulb temp values
  • values updated at standard time day beg / same all day
  • *except* wd_taDbMin and wd_taDbMax are updated at hr=23 iff DST
Name Type Variability Description/Comments
taDbMin number Start of hour
  • current day minimum DB (includes future hours), F
  • updated at hr=23 iff DST
taDbAvg number Start of hour current day average DB (includes future hours), F
taDbMax number Start of hour
  • current day peak DB (includes future hours), F
  • updated at hr=23 iff DST
taDbPvMax number Start of hour previous-day max DB, F
taDbAvg01 number Start of hour previous-day avg DB (not including current day), F
taDbAvg07 number Start of hour trailing 7-day avg DB (not including current day), F
taDbAvg14 number Start of hour trailing 14-day avg DB (not including current day), F
taDbAvg31 number Start of hour trailing 31-day avg DB (not including current day), F
  • derived (computed) electricity TDV values
  • values updated at standard time day beg / same all day
  • *except* at hr=23 iff DST
Name Type Variability Description/Comments
tdvElecPk number Start of hour
  • current day peak TDVelec (includes future hours)
  • updated at hr=23 iff DST
tdvElecPkRank number Start of hour
  • current day wd_tdvElecPk rank within year (1-365/366)
  • (largest wd_tdvElecPk=1, next=2, etc.)
tdvElecAvg number Start of hour current day avg TDVelec (includes future hours)
tdvElecPvPk number Start of hour previous-day peak TDVelec
tdvElecAvg01 number Start of hour
  • previous-day avg TDVelec (not including current day)
  • NOTE: code assumes wd_tdvElecAvg01 is last float
tdvElecHrRank[index] number Array [25] Start of hour
  • hour ranking of TDV values for current day
  • hour values reflect DST status for current day
  • [ 0]=unused
  • [ 1]=hour of highest tdvElec, 1-24
  • [ 2]=hour of 2nd highest
  • etc