OR-94-06-2 -- Computational Determination of the Behaviour of a Cold Ceiling Jet in a Room with a Plume PDF

Determines the mixing and separation behaviour of air-conditioning jets when they are used to cool rooms with varying heat loads and load locations. The behaviour of air-conditioning jet, initially attached to the ceiling of a room, was studied computationally. A buoyant plume, which either aided or opposed the flow of the jet and balanced its energy, was produced by heating one of the room walls. The effect of varying the temperature of the supply air on the jet's decay, spread, and point of separation from the ceiling was investigated for both heat source locations. The results indicated that the location of the heat source can influence the distance from the diffuser to the separation point by as much as a factor of two.

KEYWORDS: calculating, behaviour, ceilings, cold, air jets, cooling, rooms, heat load, air conditioning, jets, walls, heating, temperature difference, supply air, diffusers, cooling load, comparing, performance, temperature, air flow, air movement