Displacement Ventilation System Combined with a Novel Evaporative Cooled Ceiling for a Typical Office in the City of Beirut: Performance Evaluation

Abstract

Displacement ventilation (DV) system incorporated with  a  novel  evaporative  cooled  ceiling,  Maisotsenko  cycle  (M-cycle) is a passive technique used to enhance the load removal in spaces.  This  study  examines  the  performance  of  the  integrated system in increasing the load removal of the DV system beyond the  40  W/m2  limit  with  no  additional  energy  consumption  for  a typical  office  in  Beirut.  Mathematical  models  for  the  space  and the   evaporative   cooled   ceiling   will   be   developed   and   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 performance at lower supply air relative humidity.