headers 11 with water at an elevated pressure and temperature which is adjustable in the system but preferably constant at any chosen degree of adjustment the temperature of the incoming ambient water through supply pipe 20 has only a limited influence on system efficiency in that higher water temperature diminishes the amount of steam that will be condensed in the accelerator unit 15 and still produce the required high pressure high temperature water discharge from the exit chamber 18 the manual valves 21 and 23 are adjusted to establish the volumes of water and steam necessary to create the proper balance and water pressure and temperature increase in the accelerator unit generally speaking the ratio of one pound of steam entering the accelerator unit per gallon of hot water discharged through the pipe 26 prevails however the exact ratio depends upon whether the incoming steam is near the high or low limits of acceptable steam pressure noted above namely sixty to about four hundred psi the chart depicted in fig5 is intended to clarify the actual ratio of incoming steam pressure in psi to water discharged from the accelerator in gallons per minute and steam supply required in thousands of pounds per hour it can be observed in the chart at the point 29 on the.