. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. Fig. 13. Mercer Boiler. a good separation of the steam and water, and a stable water lineunder ordinary working conditions. The second type is illustrated by the Meal steam boiler, shownin Fig. 14. In this design there are no drums, the sections beingjoined directly together by means of push nipples at top andbottom. The Model boiler. Fig. 15, varies somewhat from those abovedescribed, being made up of sections which increase the widthinstead of the length. This form of boiler has
. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. Fig. 13. Mercer Boiler. a good separation of the steam and water, and a stable water lineunder ordinary working conditions. The second type is illustrated by the Meal steam boiler, shownin Fig. 14. In this design there are no drums, the sections beingjoined directly together by means of push nipples at top andbottom. The Model boiler. Fig. 15, varies somewhat from those abovedescribed, being made up of sections which increase the widthinstead of the length. This form of boiler has a large proportionof the heating surface exposed to the direct heat of the fire, andthe travel of the gases before reaching the smoke pipe is some- 52 BEATING AND VENTILATING PLANTS what less>than in the others just described. As the width of theboiler is increased more fire doors are provided, so that all partsof the grate can be easily reached, whatever the size. Theseboilers have no drum, and the method of connecting the sectionsis practically the same as in Fig. Fig. 14. Ideal Boiler. In General.—There are many different designs of cast-ironboilers for low pressure steam and hot-water heating, but theones shown serve to illustrate the distinctive features of some ofthe more important types. Boilers having a drum connected witheach section by nipples usually give dryer steam and hold asteadier water line than the second form, especially when forcedabove their normal capacity. The steam in passing through theopenings between successive sections is apt to carry with it moreor less water and to partially choke the openings, thus tendingto produce uneven pressure in different parts of the boiler. Thisis especially noticeable when two or more boilers are connected BOILERS 53 together in a battery. In the case of hot-water heating this ob-jection disappears. In order to adapt this type of boiler to steam work the open-ings between the sections should be of good size, wi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventilation, bookyear
