Schematic of Attached and Separated Wall Jets


Numerical Simulation of Effective Cold Air Jet Thermal Comfort Contours in an Office Room

COLD AIRDIFFUSER PERFORMANCE

As an outgrowth of work on the use of ice storage to limit demand caused by air conditioning systems in buildings, SEAL researchers are studying the performance of diffusers when subjected to much colder than normal supply air temperatures (i.e., 35-45 F supply). These cold air temperatures are made practical by the cold temperatures associated with ice storage.

Cold air systems can reduce construction first costs, energy expenses, building interior sound levels, and building volume required for mechanical equipment and air ducts.

We recognize the need for a design guideline for cold air diffuser selection to address concerns about cold air jet separation, ventilation, and occupant comfort.

Our researchers have carried out studies to determine the cold air jet flow and separation characteristics. We have developed design procedures adopted by industry for guiding the application of cold air technology using existing throw models.

Extensions of the air diffusion performance index to cold air systems will address comfort issues.

Home