# Guide to solar energy acronyms

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# Solar Energy AcronymsEdit

Acronym | Meaning | Units |
---|---|---|

TSW | Thermal Storage Wall | |

DHW | Domestic Hot water | |

HWB | Hot Water Boiler | |

S | monthly solar insolation absorbed | |

GPD | Gallons per day | |

SLR | solar load ratio | |

NLC | net building load coeficent | |

SSF | solar savings factor | |

LCR | load colector ratio | |

UA | ? | |

COG | center of glass | |

MAX | matched asymtotic expansions | |

DIRECT | DIstributed REsource Computing Tool | |

DG | distributed generation | |

LON | local longitude | degrees |

AST | apparent solar time | |

LSM | local standand time meridian | |

Ac | System size | m^2 |

fs | fraction of heat load | |

CRF | Cost Recovery Factor | |

BLC | building loss coeficent | |

DD | degree day | |

LOEP | loss of energy probability | % |

PV | photovoltaic | NA |

SPGR | specific gravity | |

SOC | state of charge | |

DOD | depth of discharge | |

MPPT | maximum power point tracker | NA |

mAH | milli-Amp hour | mAH |

S.A.P.V. | Stand allown photovoltaic | NA |

BFV | ? | |

NOCT | normal cell temperature | C |

FF | fill factor | |

TRW | companies PV cell electrical model | NA |

DHW | domestic hot water | NA |

CFD | cumulative frequency distribution | |

GCR | ground cover ratio | % |

DOC | depth of charge | |

EOT | Equation of time | NA |

SHGF | solar heat gain factor | |

IRR | internal rate of return | |

P.O.P | Payback period | |

Q | volume air flow rate | m^3/s |

F | heat loss per length | W/m/C |

hfg | enthropy of vaporization | kJ/kg |

cp | specific heat | kJ/kg/K |

q | heat loss | |

HDD | heating degree days | C*days |

DHC | Diurnal Heat Capacity | Btu/degree(F)/ft^2 |

EHC | Effective Heat Capacity | |

SHGF | Solar Heat Gain Factor | |

VT | Visible transmmitance | |

SC | shading coeficent |