DHWTank

Name Type Variability Description/Comments
mult number input time
  • count of identical DHW tanks (default 1)
  • models as if repeated identical input
UA FLOAT_GEZ input time
  • tank water-to-air UA, Btuh/F
  • default: derived from wt_vol and wt_insulR
vol FLOAT_GEZ input time tank volume, gal
insulR FLOAT_GZ input time
  • total tank insulation resistance, hr-F/Btuh
  • = built-in + exterior wrap
tTank number Start of hour
  • assumed tank water temperature, F
  • default = [DHWSYS][dhwsys] ws_tUse
znTi TI input time
  • [DHWTANK][dhwtank] location zone re tank loss
  • 0 iff wt_tEx being used
  • heat losses go to half to zone air / half radiant
tEx number Start of hour
  • surrounding temperature, F for tank loss
  • when wt_tEx set
  • - wt_znTi ignored
  • - heat loss discarded
xLoss number Start of hour
  • other tank temp-independent losses, Btuh
  • for e.g. T24 fitting losses
qLossSh number End of subhour current subhr loss rate, Btuh
qLoss number End of hour
  • current hour's total loss, Btu
  • for 1 tank (no wt_mult)