Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Application and Results

Abstract

In the theory and modeling part, the principles of VAV box optimization are investigated. The simulations show that optimizing cold and hot deck reset schedules can significantly reduce the amount of energy consumption. During a Continuous Commissioning (CC) process, the optimal cold and hot deck reset schedules were implemented in 12 dual duct variable air volume systems which serve a 324,000 ft2 university building. The improved cold and hot deck reset schedules combined with other CC measures reduced the chilled water energy consumption by 7,571 MMBtu/yr (18%) and 303 MWh/yr (18%) for the fan power. The estimated heating energy savings are 2,327 MMBtu/yr. The estimated annual cost savings are $75,040/yr. This paper presents the building and AHU system information, optimal reset schedule, and measured results.