Handbook for heating and ventilating engineers . Fig. Fig. 19. 70 HEATING AND VENTILATION Some topm of shaking or dumping grate should be se-lected, as a stationary grate is far from satisfactory. Careshould be exercised also, in the selection of the movablegrate, as some forms not only stir up the fire but permitmuch of it to fall through to waste when being operated. The fuel is fed to the flre-pot from the door above thefire. This is called a top-feed furnace. In some forms, how-ever, the fuel is fed up through the grate. This is calledthe under-feed furnace, Fig. 19, and is rapidly ga
Handbook for heating and ventilating engineers . Fig. Fig. 19. 70 HEATING AND VENTILATION Some topm of shaking or dumping grate should be se-lected, as a stationary grate is far from satisfactory. Careshould be exercised also, in the selection of the movablegrate, as some forms not only stir up the fire but permitmuch of it to fall through to waste when being operated. The fuel is fed to the flre-pot from the door above thefire. This is called a top-feed furnace. In some forms, how-ever, the fuel is fed up through the grate. This is calledthe under-feed furnace, Fig. 19, and is rapidly gaining infavor. The latter type requires a rotary ring grate withthe fuel entering up through its center. The size of the furnace may be obtained from the estimatedheating capacity in cubic feet of room space as given in thesample Table 18, Appendix. Another and perhaps a bet-ter way, and one that serves as a good check on the above,Is to select a furnace from the calculated grate area. See Having selected the furnace by the grate area, checkthis
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventila, bookyear1913
