The total energy output of recessed fluorescent lights in a zone of a building is 780 W. The space fraction is 0.75. The lighting schedule based on wattage is given in Table P10.4.1. The radiant fraction of the heat released by the lights is 0.65. The non-solar RTS values appropriate to the zone, obtained from Table 19, Chapter 18 of the ASHRAE Handbook - 2013 Fundamentals [1] are given in Table P10.4.2. Calculate (i) the cooling load due to lighting 8 p.m., and (ii) the maximum cooling load due to lighting and the time when it occurs.
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