Airport Escalators and Moving Walkways—Cost-Savings and Energy Reduction Technologies (2014)

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27 C H A P T E R 5 Overview The goal of the financial tool is to provide a quantitative assessment of proposed energy saving projects for a single escalator or moving walkway, or a group of escalators or moving walkways. The financial tool analyzes various technologies to calculate key metrics, including the following: • Potential annual energy savings for selected technology(ies), relative to baseline values; • Potential annual cost savings for selected technology(ies), relative to baseline values; • Financial payback period; • Return on investment (ROI); and • Potential cost savings over the life of the system, relative to baseline values. How to Calculate Outputs The following section discusses the steps required to run the financial tool. Step 1: Enter Escalator/Walkway Information for the Current System To generate cost and financial metrics for an evaluation case, it is first necessary to enter infor- mation for the current escalator/moving walkway configuration, as shown in Figure 5-1. This information is entered in the Inputs Tab of the workbook. Although all of the information con- tained in the Inputs Tab is helpful for tracking an evaluation case, not all information is necessary in order to generate outputs. The information required to produce outputs is as follows: • Number of escalators/moving walkways, • Type of transport device, • Width of step, • Depth of step, • Maximum capacity, • Speed of escalator/moving walkway, • Average weight per passenger, • Estimated installation cost, • Number of motors per escalator/moving walkway, • Type of motor installed, • Motor horsepower, • Full load efficiency, • Power factor, • Whether the motor is inverter rated, • Motor controls currently installed, How to Use the Financial Tool

28 Airport Escalators and Moving Walkways—Cost-Savings and Energy Reduction Technologies Figure 5-1. Tool input screen.

How to Use the Financial Tool 29 • Estimated life expectancy of escalator/moving walkway, • Number of passengers, • Start time, • End time, • Unit electricity cost, and • Percentage of time not in use. Step 2: Select a Technology Configuration for Evaluation To evaluate a technology configuration, users must select the technology(ies) to be evaluated in the Inputs Tab section named “Energy Savings Technologies to Consider for Evaluation.” Note that only one technology configuration (i.e., a single technology or a combination of tech- nologies) may be selected with the exception of LED lighting and high-efficiency motors, which may be combined with one other technology configuration. Also, if a motor is not indicated as being inverter rated in the “Escalator(s) or Walkway(s) Specifications Continued” section of the Inputs Tab, then only LED lighting, capacitors, or high-efficiency motors can be evaluated. Step 3: Enter Average Passenger Flow Data The Average Passenger Flow Table contained in “Escalator(s) or Walkway(s) Specifications Continued” allows for the tracking of usage information, such as passenger flow and usage per- centage, as well as unit electricity cost information for a given time period. To accurately evaluate an escalator/moving walkway configuration, the Average Passenger Flow Table should contain information for an entire day of operation. The Average Passenger Flow Table, pictured in Figure 5-2, has the capacity to track information for up to 24 discrete time periods. If needed, another row can be added to Figure 5-2. Average Passenger Flow Table.

30 Airport Escalators and Moving Walkways—Cost-Savings and Energy Reduction Technologies the table by clicking the Add More Rows Button located beneath the Average Passenger Flow Table. Step 4: Calculate Outputs After entering the required inputs as identified in the previous section, click the Calculate Sav- ings Button located in the Inputs Tab as shown in Figure 5-3. This will generate the following outputs shown in Figures 5-4 and 5-5: • Current and Potential Energy Consumption: Contains information regarding current and potential escalator/moving walkway energy consumption. • Cost and Other Financial Considerations: Contains information regarding current and potential annual escalator/moving walkway energy cost, along with financial metrics to sup- port project evaluation. Note that if no installation cost value is entered in the Inputs Tab, or if the installation cost is $0, then financial metrics will not be calculated. • Technology Limitations: Displays information regarding limitations for technologies selected to be evaluated. This information can be hidden by clicking the Hide Assumptions & Limita- tions Button located in the Outputs Tab. Figure 5-4. Summarized outputs. Figure 5-3. Calculate Savings Button.

How to Use the Financial Tool 31 After clicking the Calculate Savings Button, an error message may appear. If an error message is encountered, the tool will not calculate output values. To calculate output values, the error must be corrected. Potential error messages and corresponding troubleshooting responses are shown in Table 5-1. Step 5: Reset the Financial Tool To reset the financial tool and begin a new evaluation case, click the Reset Button located beneath the Average Passenger Flow Table in the Inputs Tab. This will clear all information entered for an evaluation case, with the exception of the default values shown in Table 5-2. Figure 5-5. Detailed outputs. xiF rorrE egasseM rorrE Please enter a value for Installation Cost. Enter a numerical value for estimated installation cost in the section for Escalator(s) or Walkway(s) Specifications Continued in the Inputs Tab. If a motor is not inverter rated, then only LED lighting, capacitors, or high-efficiency motors can be evaluated. If the answer to the question “Is the motor inverter rated?” in the section on Escalator(s) or Walkway(s) Specifications Continued of the Inputs Tab is “No,” then ensure that only LED lighting, capacitors, or high- efficiency motors are selected to be evaluated. Table 5-1. Financial tool error messages.

32 Airport Escalators and Moving Walkways—Cost-Savings and Energy Reduction Technologies Table 5-2. Financial tool default values. eulaV dleiF What is the wattage per fixture? Calculated value, dependent on the type of lights currently installed Maximum capacity per step Calculated value, dependent on whether a moving walkway is being evaluated, and the value for width of step Maximum speed of escalator/moving walkway 1.5 feet/second sbl 481 regnessap rep thgiew egarevA Estimated life expectancy of escalator/moving walkway 16 years 5.0 rotcaf rewoP