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Displacement ventilation (DV) system incorporated with a novel evaporative cooled ceiling, Maisotsenk o cycle (M- cycle) is a passive technique used to enhance the l oad removal in spaces. This study examines the performance of the integrated system in increasing the load removal of the DV sys tem beyond the 40 W/m 2 limit with no additional energy consumption for a typical office in Beirut. Mathematical models for th e space and the evaporative cooled ceiling will be developed an d then validated through experimentation. Simulations are performed under different supply air relative humidity values , were an improvement in sensible load removal of 18.65%, 44.3% and 72.25% at supply air relative humidity of 90%, 50% and 10% respectively. Results showed better cooling perform ance at lower supply air relative humidity.

Displacement ventilation system combined with a novel evaporative cooled ceiling for a typical office in the city of Beirut: performance evaluation