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1 1. Overview of the Data Collection and Analysis Process The overall data collection and analysis process for developing the Airport Terminal Buildings (ATBs) benchmarks is shown in Figure 1. This figure is divided into three main tasks: 1) developing the individual benchmarks in the upper portion of the figure and making comparisons between participating ATBs; 2) comparing estimated benchmarks with actual measured data from the ATBs; and 3) developing the Representative Airport Terminal Buildings (RATBs) benchmarks in the lower part of the figure. To develop the individual ATB benchmark, two different procedures were created: one based on specific zones/functions within the ATB, each with a certain square footage; and one, based on the mechanical systems that can be found in an ATB and their particular parameters (not based on square footage). The cumulative result from the application of these two procedures produces the overall annual energy use intensity baseline for the ATB. In the first procedure, the ATB is sub-divided into specific Zones (i.e., concession, office, transient space, etc.) and each of these Zones is assigned an Energy Use Intensity (EUI) based on the best available published EUIs that are appropriate for that type of space. Each ATB Zone EUI is then converted to an Energy Use (EU), by multiplying the EUI value with the square footage of that particular Zone. The EUs of all the various Zones are then added up to a subtotal EU for ATB Zones. Each ATB Zone EU is also divided by the total square footage of the buildings, which provides a normalized EUI for each ATB Zone. The EUIs of all the various Zones are then added up to a subtotal EUI for all ATB Zones. In the second procedure, specific systems that are common to ATBs are identified and their annual EU is determined based on their specific parameters and the best available procedures for determining the annual EU of such systems. The Systemsâ EUs are summed up to a subtotal EU for all ATB systems. Each ATB system EU is also divided by the total square footage of the building, which provides a normalized EUI for each ATB system. The EUIs of all the various systems are then added up to a subtotal EUI for all ATB systems. The overall ATB benchmark is the combination of the two subtotals: the annual EUI for all the ATB Zones and annual EUI for all the ATB Systems. This process is applied to each of the participating airports to determine the annual estimated EU and EUI of the individual ATB. The measured EUI, based on utility information is then calculated, and comparisons can be made between the estimated EU and EUI and the measured EU and EUI for each individual ATB, as well as comparisons between participating ATBs. Once the process has been applied to the participating ATBs, comparisons can be performed, the Representative Airport Terminal Buildings (RATBs) can be defined, and their benchmarks can be set.
