LP-gas is delivered to most peak shaving plants via truck or railcar. Almost all systems are equipped for trucks, while a minority also use rail. A limited number of sites are fed directly by LPG pipelines.

Transport

Railcar

Truck Fuel Transfer Station

The location and construction of fuel transfer stations are important design factors. Emergency valves are required at transfer stations to allow quick closure. A "breakaway" feature is also required to protect plant piping in the event of a connected-truck pull away. Trucks normally have PTO pumps to transfer product. Top-fitted railcars require the use of vapor compressors to "push" the liquid propane out and, on a secondary cycle, recover much of the remaining propane vapor.