## 6.28 DuctSeg (owner: RSYS)

@DuctSeg[1..].

Name | Input? | Runtime? | Type | Variability | Description |
---|---|---|---|---|---|

name | X | X | string | constant | – |

ty | X | X | unrecognized | input time | Type: c_ducttych_ret / _sup |

absSlr | X | X | number | subhourly | – |

awAbsSlr | X | X | number | subhourly | – |

epsLW | X | X | number | subhourly | – |

zi | X | X | integer number | subhourly | – |

F | X | X | number | subhourly | – |

Fp | X | X | number | subhourly | – |

frRad | X | X | number | subhourly | – |

fSky | X | X | number | subhourly | – |

fAir | X | X | number | subhourly | – |

hcNat | X | X | number | end of each subhour | – |

hcFrc | X | X | number | end of each subhour | – |

hcMult | X | X | number | end of each subhour | – |

hxa | X | X | number | end of each subhour | – |

hxr | X | X | number | end of each subhour | – |

hxtot | X | X | number | end of each subhour | – |

uRat | X | X | number | end of each subhour | – |

fRat | X | X | number | end of each subhour | – |

cx | X | X | number | end of each subhour | – |

sgTarg.bm | X | X | number | end of each subhour | – |

sgTarg.df | X | X | number | end of each subhour | – |

sgTarg.tot | X | X | number | end of each subhour | – |

sg | X | X | number | end of each subhour | – |

tSrf | X | X | number | end of each subhour | – |

tSrfls | X | X | number | subhourly | – |

qrAbs | X | X | number | end of each subhour | – |

txa | X | X | number | end of each subhour | – |

txr | X | X | number | end of each subhour | – |

txe | X | X | number | end of each subhour | – |

w | X | X | number | end of each subhour | – |

qSrf | X | X | number | end of each subhour | – |

pDS | X | X | unrecognized | subhourly | Pointer to parent ductseg |

exArea | X | X | number | input time | Exterior heat transfer surface area, ft2 (outside of insulation) |

diam | X | X | number | input time | Duct diameter (w/o insulation), ft |

len | X | X | number | input time | Total length (all branches), ft |

branchLen | X | X | number | run start time (of each phase, autoSize or simulate) | Average branch length, ft |

branchCount | X | X | integer number | input time | # of branches |

branchCFA | X | X | number | input time | Floor area served per per branch, ft2 |

airVelDs | X | X | number | input time | Design air velocity, fpm |

inArea | X | X | number | input time | Interior surface area, ft2 |

insulR | X | X | number | input time | Rated insulation resistance, ft2-f/btuh |

insulMati | X | X | integer number | input time | Insulation material, 0 if none |

insulKA | X | X | number | run start time (of each phase, autoSize or simulate) | Constants for insul conductivity: kinsul = ka + kb*t |

insulKB | X | X | number | run start time (of each phase, autoSize or simulate) | – |

insulThk | X | X | number | run start time (of each phase, autoSize or simulate) | Insulation actual thickness, ft |

insulThkEff | X | X | number | run start time (of each phase, autoSize or simulate) | Effective insulation thickness, ft |

RconvIn | X | X | number | autosize and simulate phase start time | Inside surfce convection resistance, ft2-f/btuh |

Rduct | X | X | number | end of each hour | Total resistance from duct air to exterior surface of insulation |

Uduct | X | X | number | end of each hour | 1/ds_rduct |

insulREff | X | X | number | end of each hour | Effective insulation resistance, ft2-f/btuh |

exCnd | X | X | integer number | input time | Adjacent cond: adiabatic/ambient/spect/adjzn. |

leakF | X | X | number | input time | Leakage fraction, 0-1 |

uaTot | X | X | number | end of each subhour | Cur step total conductance between duct air |

beta | X | X | number | end of each subhour | Cur step conduction loss parameter (1 - effectiveness) |

air[0].tdb | X | X | number | end of each subhour | – |

air[0].w | X | X | number | end of each subhour | – |

air[1].tdb | X | X | number | end of each subhour | – |

air[1].w | X | X | number | end of each subhour | – |

air[2].tdb | X | X | number | end of each subhour | – |

air[2].w | X | X | number | end of each subhour | – |

air[3].tdb | X | X | number | end of each subhour | – |

air[3].w | X | X | number | end of each subhour | – |

amfFL | X | X | number | end of each subhour | Dry air mass flow rate at full load, lbm/hr |

qCondFL | X | X | number | end of each subhour | Full load total conduction losses to surround (+ = out of duct), btuh |

qCond | X | X | number | end of each subhour | Total conduction loss rate to surround (+ = out of duct), btuh |

qCondAir | X | X | number | end of each subhour | … to txa (air) |

qCondRad | X | X | number | end of each subhour | … to txr (radiant) |

qLeakSen | X | X | number | end of each subhour | Leakage sensible heat loss rate, btuh (+ = out of duct) |

qLeakLat | X | X | number | end of each subhour | Leakage latent heat loss rate, btuh (+ = out of duct) |