    Sentence 1: What is another name for a  coal supply bin?    Sentence 2: Other components are often  present; pumps (such as an injector) to  supply water to the boiler during  operation, condensers to recirculate the  water and recover the latent heat of  vaporisation, and superheaters to raise  the temperature of the steam above its  saturated vapour point, and various  mechanisms to increase the draft for  fireboxes.