Abstract :
The paper first deals with the evolution of the Benson boiler and then proceeds to detail the steps taken to enable it to be used for commercial purposes, first at critical and later at sub-critical pressures. The present design of the boiler is next discussed and it is claimed that a considerable saving in weight and cost is obtained with it as compared with ordinary water-tube boilers. A brief discussion of the probable future development of the boiler follows. The operation of the boiler at variable pressure is next dealt with. Finally, some figures of cost are given and the advantages and possibilities of the boiler are summarized.
