Qel WlFul

where qel = rate of heat gain from lights (W). Wl = total installed light wattage.

Ful = lighting use factor, ratio of wattage in use to total installed wattage. Fsa = special allowance factor (ballast factor in the case of fluorescent and metal halide fixtures).


Considerable data are available for this category of cooling load, but careful evaluation of the operating schedule and the load factor for each piece of equipment is essential. Generally, the sensible heat gains from the appliances (qa) can be calculated from:


Wa = rate of energy input from appliances (W).

FU, Fr, Fl = usage factors, radiation factors, and load factors.

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Getting Started With Solar

Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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