## 6.21 DHWSolarSys

@DHWSolarSys[1..].

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

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

elecMtri | X | X | integer number | input time | Meter for pump and parasitic electricity use |

endUse | X | X | integer number | input time | End use of pump energy. defaults to “dhw” |

parElec | X | X | number | hourly | Parasitic electricity use, w |

scAreaTot | X | X | number | run start time (of each phase, autoSize or simulate) | Total of child dhwsolarcollectors, ft2 |

scCount | X | X | number | run start time (of each phase, autoSize or simulate) | # of child dhwsolarcollectors (not necessarily # of panels) |

tank.tEx | X | X | number | end of each subhour | – |

tank.tASHPSrc | X | X | number | end of each subhour | – |

tank.fMixUse | X | X | number | end of each subhour | – |

tank.fMixRL | X | X | number | end of each subhour | – |

tank.inElec[0] | X | X | number | end of each subhour | – |

tank.inElec[1] | X | X | number | end of each subhour | – |

tank.heatAdded[0] | X | X | number | end of each subhour | – |

tank.heatAdded[1] | X | X | number | end of each subhour | – |

tank.tOut | X | X | number | end of each subhour | – |

tank.tOutCHDHW | X | X | number | end of each subhour | – |

tank.HPWHxBU | X | X | number | end of each subhour | – |

tank.qEnv | X | X | number | end of each subhour | – |

tank.qLoss | X | X | number | end of each subhour | – |

tank.qHW | X | X | number | end of each subhour | – |

tank.qTX | X | X | number | end of each subhour | – |

tank.tankHCNominal | X | X | number | end of each subhour | – |

tank.tankHCBeg | X | X | number | end of each subhour | – |

tank.tankHCEnd | X | X | number | end of each subhour | – |

tank.tHWOutF | X | X | number | end of each subhour | – |

tank.tHWOut | X | X | number | end of each subhour | – |

tank.qBal | X | X | number | end of each subhour | – |

tank.balErrMax | X | X | number | end of each subhour | – |

tankVol | X | X | number | run start time (of each phase, autoSize or simulate) | Tank volume, gal |

tankUA | X | X | number | run start time (of each phase, autoSize or simulate) | Tank water-to-air ua, btuh/f |

tankInsulR | X | X | number | run start time (of each phase, autoSize or simulate) | Total tank insulation resistance, hr-f/btuh |

tankZnTi | X | X | integer number | input time | Tank location zone re tank loss |

tankTEx | X | X | number | hourly | Surrounding temperature, f for tank loss |

tankTAvg | X | X | number | end of each hour | Hour average tank temp, f (check figure) |

tankQLoss | X | X | number | end of each hour | Current hour’s total tank loss, btu |

tankHXEff | X | X | number | hourly | Tank heat exchanger effectiveness |

tankTHxLimit | X | X | number | input time | Tank temp limit, f; collector heat |

tickVol | X | X | number | end of each subhour | Current tick draw to dhwsyss, gal |

tickVolT | X | X | number | end of each subhour | Current tick (vol * inlet temp), gal-f |

tickTankTOutlet | X | X | number | end of each subhour | Current tick tank outlet temp |

drawVol | X | X | number | end of each hour | Current hour total draw, gal |

tankQGain | X | X | number | end of each hour | Current hour total gain from solar hx (all collectors), btu |

tankQGainTot | X | X | number | end of run (of each phase, autoSize or simulate) | Sw_tankqgain annual total, btu |

tankTInlet | X | X | number | end of each hour | Tank inlet temperature, f |

tankTOutlet | X | X | number | end of each hour | Current hour average tank outlet temperature, f |

tankTHx | X | X | number | end of each hour | Nominal tank heat exchange temp, f |

totOut | X | X | number | end of each hour | Current hour total dhwsolarsys output, btu |

scFluidSpHt | X | X | number | input time | Collector working fluid specific heat, btu/lbm-f |

scFluidDens | X | X | number | input time | Collector working fluid density, lb/ft3 |

scFluidVHC | X | X | number | run start time (of each phase, autoSize or simulate) | Collector working fluid volumetric heat capacity, btu/gal-f |

scTInlet | X | X | number | end of each hour | Mixed collector inlet temperature, f |

scTOutlet | X | X | number | end of each hour | Mixed collector outlet temperature, f |

overHeatHrCount | X | X | integer number | end of run (of each phase, autoSize or simulate) | Number of hours during which collector did not |

SSFAnnual | X | X | number | end of run (of each phase, autoSize or simulate) | Annual solar savings fraction |