Economic modelling indicates that bus operators could achieve payback on a Dearman system in as little as two years. Operators of refrigerated vehicles could achieve payback within a year.
The Dearman auxiliary power system would be a cost effective enhancement to a vehicle’s systems, utilising the unique properties of an engine powered by liquid nitrogen to provide efficient cooling and also sufficient power for the vehicle’s electrified braking, steering assistance, electric doors, lighting etc.
This approach would lessen the requirement for a vehicle to run its engine while stationary, and either reduce fuel usage or increase battery range. It could even have a positive impact upon long term vehicle design, by reducing the maximum load on the engine or the battery, enabling both to potentially be downsized and made lighter.