Mechanical Engineering Commons^™

Evaluating The Impacts Of Uncontrolled Air Flow And Hvac Performance Problems On Florida's Commercial And Institutional Buildings - Final Report, Florida Solar Energy Center, James Cummings

FSEC Energy Research Center®

Twenty commercial and institutional buildings located in central Florida were tested for uncontrolled air flow and cooling system problems. Tested buildings were selected based on three criteria; 1) buildings with large exhaust fans, 2) buildings with leaky ceilings, and 3) education buildings. They ranged in size from a 650 square foot portable classroom to a 50,000 square foot elementary school, with an average floor area of 6518 square feet.

Diagnostic inspection and testing was performed in each building to identify problems related to uncontrolled air flow or HVAC system or control problems. The tests were performed to characterize or identify …

Improving Doe-2'S Resys Routine: User Defined Functions To Provide More Accurate Part Load Energy Use And Humidity Predictions, Florida Solar Energy Center, Hugh Henderson, Jr.

FSEC Energy Research Center®

In hourly energy simulations, it is important to properly predict the performance of air conditioning systems over a range of full and part load operating conditions. An important component of these calculations is to properly consider the performance of the cycling air conditioner and how it interacts with the building. This paper presents improved approaches to properly account for the part load performance of residential and light commercial air conditioning systems in DOE-2. First, more accurate correlations are given to predict the degradation of system efficiency at part load conditions. In addition, a user-defined function for RESYS is developed that …