In considering the relation between the economic results of plants of the two types under discussion, namely steam and producer-gas, the fact should be remembered that today, in the ordinary manufacturing plant operated by steam power, less than 5 per cent of the total energy in the fuel consumed is available for useful work at the machine.
In this connection it is of interest and value to glance at the possibilities of the best-designed and most skilfully operated commercial plant now in use. The data concerning the steam plant selected for this determination are derived from a table prepared by Mr. Stott, superintendent of motive power, Interborough Rapid Transit Company, New York City, which, as Mr. Stott says, shows “the losses found in a year’s operation of what is probably one of the most efficient plants in existence today, and, therefore, typical of the present state of the art.”
Figure 1.--Annual increase in number of producer-gas power plants in the United States.
Figure 2.--Annual increase in the total horsepower of producer-gas power plants in the United States.
