Benefits of Electrifying Passenger Transfer Vehicles
Full electrification will eliminate the tailpipe emissions from the fleet of PTVs , resulting in major air quality improvements . On a per-vehicle basis , we have calculated the expected annual emissions reductions by converting diesel PTVs to electric propulsion as follows :
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Mobile Lounges
o 68 metric tons ( MT ) of CO 2 equivalent ( CO 2 e ) per year
o 458 kilograms ( kg ) of NOx per year
o 0.6 kg of SOx per year .
� Plane Mates 11
o 62 MT of CO 2 e per year
o 352 kg of NOx per year
o 0.5 kg of SOx per year .
In addition to the elimination of tailpipe emissions , electrification of the PTVs would offer other benefits , including :
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The elimination of more than 448,000 gallons of diesel use annually . This fuel cost the Authority $ 910,000 in 2019 Reduction in maintenance costs . In 2018 , we spent $ 2.3 million maintaining the PTVs . From 2013 – 2018 , we spent more than $ 13.5 million maintaining the fleet
We do recognize , however , that while electrification would eliminate on-site diesel fuel use for the PTVs and the resulting emissions , the production of the electricity needed to power the PTVs creates its own emissions . Utilizing the data from the dataloggers , our analysis has shown that based on an average daily duty cycle ( i . e . miles driven ), a PTV would need approximately 306 kilowatt-hours ( kWh ) of electricity per day or 111,690 kWh per year . Based on the emissions profile in the region where we get our electricity , the resulting annual emissions per each electrified Mobile Lounge ( with Plane Mates being similar ) would be as follows :
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38 MT of CO 2 e 20 kg of NOx 15 kg of SOx
As a result , the net annual emissions impact from the electrification of a single Mobile Lounge is as follows :
o o o
Net reduction of 30 MT of CO 2 e emissions Net reduction of 438 kg of NOx Net increase of 14.4 kg of SOx . Our SOx emissions will increase because the PTVs currently emit only modest amounts of SOx given the use of low sulfur diesel fuel
11 Based on an analysis of the daily duty cycle , the Plane Mates monitored traveled fewer miles per day than the
Mobile Lounges , which results in less fuel per day consumed . Therefore , electrification of the Plane Mates would have fewer emissions benefits given less fuel saved on a per-vehicle basis .
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