Boilers |
 The
vehicle has very clean burn characteristics typically associated with a
low combustion pressure and an extremely clean burning fuel. The car has
four independent boiler systems each feeding one of the nozzles of the
turbine. The boilers are laid horizontally behind the driver along the
longitudinal axis of the car and each is comprised of 28 finned tubes (superheat
zone tubes are non-finned) manufactured from 321 stainless steel. Each
boiler section feeds one nozzle of the turbine and can be fired independently
if necessary.
The fuel is to be liquefied petroleum gas (L.P.G.) fed into the boilers at a relatively low pressure a little over 2 bar. Although the system is still under design it is anticipated that each burner panel will be independently controlled. This will be advantageous when we are conducting trials as we can fire only the number of boiler sections needed. Each boiler section is being designed to produce steam at 500 PSI and 725 F with a mass flow rate of 625 lb/hr. |
(c) 1999-2008, British Steam Car Challenge |
The iterative process of designing the boilers has proven to be a time consuming matter. The original configuration exceeded our space allowances, and subsequent revisions proved to be unusable for other technical reasons. The final design provides the necessary 2MW of heat release the project requires.