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This paper looks at operating and control procedures that shift the heat storage in the building elements to times of day when the building's air conditioning load peaks and procedures that increase the heat stored to reduce the peak load. The reduction of peak load will decrease system size and peak electrical load. Operating and control procedures have been evaluated using weighting factors. Theoretical results are compared with test results, and good agreement is shown. The results and discussion are based on an interior room with no occupants. The only load is lighting. Also looks at the length of the pulldown cycle required to remove stored heat from the structure, the effect of switching return air from ceiling plenum return to ducted return, direct cooling of the return air plenum for part of the occupied period, temperature drift resulting from limited cooling capacity, and the time shift obtained by precooling the room. Air conditioning load reductions of as much as 25% of the lighting power (CLF of much as 20% of the total cooling load, this can reduce the building's air conditioning system load by 5%.

KEYWORDS: air conditioning, cooling load, energy storage, buildings, structure, climate chambers, testing, peak load, comparing, temperature difference, lighting, structure heat storage.

Citation: Symposium, ASHRAE Transactions, vol.97, Pt. 1, New York 1991