Improving energy efficiency with the various control sequences for a VAV system through continuous commissioning®

Abstract

SUMMARYThis paper discusses the implementation of the innovative technologies for variable-air-volume (VAV) systems in a Continuous Commissioning (CC s ). The implemented building is a 5-story office facility with a total floor area of 8472 square meters, most of which is open space. An energy audit was conducted to evaluate the building's energy performance and identify potential cost-effective energy saving opportunities. Specific CC s measures were implemented in the building. This paper presents procedures, implementations and detailed descriptions of control sequence and operation comparisons for the terminal boxes and air-handling units (AHUs), as well as the chilled water system and hot water system. The results show CC s can improve building operations and reduce energy costs. The energy report shows the electricity savings of 26.8% and gas savings of 47.8% on an average.

Building Energy Management Systems: Global Potentials and Environmental Implications of Deployment

“…; Runming and Short ); building materials and insulation (Strachan ; Xing et al. ; Ordóñez and Modi ); building automation; and heating, ventilation, and air conditioning (HVAC) systems (Cho and Liu ; Guo et al. ; Sung et al ; Olivieri et al.…”

Lifetime commissioning as a tool to achieve energy-efficient solutions

“…The measurements of the condenser load in the upper part of Figure 4 were obtained by using Equation (5) for the direct measurement, and using Equation (9) for the indirect measurement. The measurements of the compressor power in the mid of Figure 4 were obtained by using Equations (3) and (4) for the direct measurement, and using Equation (6) for the indirect measurement.…”

“…Implementation of highly energy-efficient solutions and aiming to the zero energy or emission building will require even more building information and high instrumentation. Further, it was shown that by doing Continuous Commissioning, it was possible to achieve improvement in building operation and reduce energy costs [5]. To overcome these challenges, it is necessary to have a tool that can help to provide quality control on building energy performance, to perform fault detection and diagnosis, and overcome poor functional integration induced by information loss.…”

“…LTC has been recognized as a tool that can perform these given tasks [2][3][4]. Further, it was shown that by doing Continuous Commissioning, it was possible to achieve improvement in building operation and reduce energy costs [5]. Therefore, the Norwegian LTC procedures were developed to create a good information system during the entire building lifetime.…”