Application of upper fresh air supply to ceiling radiation system

To lower the initial investment of ceiling radiation plus the fresh air replacement system, compares the air replacement effect between the upper fresh air supply and the ceiling radiation system with the under floor air supply system. The simulation results with Fluent software show that the difference of the temperature fields and flow fields and of air ages in the occupied zone is smaller, the thermal comfort is better between upper air supply and under floor air supply, and the upper air supply can replace under floor air supply under certain conditions.