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Locomotive fuel vapor reclamation system field evaluation and cost-benefit analysis : draft final report.
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2015-10-21
[PDF-11.49 MB]
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Edition:Draft final report
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Abstract:This report summarizes the results of the work performed to install a diesel vapor reclamation unit (DVRU) on an SD70 MAC
locomotive of BNSF Railways and its performance evaluation during freight railroad service. One complete DVRU with several
sensors for monitoring fuel and ambient temperatures as well as the fuel vapor-to-air ratio was installed on BNSF9674. An
electronics control unit with digital data acquisition and wireless communication over mobile network and internet constituted the
remote DVRU data monitoring system. As BNSF9674 was deployed over its freight carrying routes, the DVRU system
performance data could be monitored only over a very limited period of time. Often, the remote data transmission was interrupted
due to inadvertent locomotive and/or DVRU maintenance problems. Based on one year’s experience with performance
monitoring, it was concluded that practical difficulties with day-to-day revenue service operations may not permit smooth
operation of the DVRU over a long period. This precluded the scope for further installation of more DVRUs on other
locomotives. Because the amount of useful DVRU system performance data from the field tests was insufficient, a cost-benefit
estimate was carried out while accounting for the contributions of the DVRU and return fuel cooling. In the best case scenario, the
return on investment in DVRUs would take 15 years to recover.
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