At present coal is the most common food of a steam plant . 目前,煤是蒸汽动力厂的最常用的能源。
When allowance is made for the separate auxiliary load the consumption can rise to nearly 1 ib / shp hour and this is generally about 20 % better than the overall fuel consumption of a steam plant at cruising speed 当考虑分开的辅机负荷时,其耗油率几乎能增加到1磅/轴马力小时,一般来说比蒸汽装置的巡航总油耗大约多20 % 。