II. HORIZONTAL REGENERATORS
Horizontal regenerators have a bad reputation. There is
nothing surprising in this, because in the design of this type
of regenerator there is displayed a gross disregard of the rules
governing the subdivision of gaseous currents. Take, for example,
the regenerators of the celebrated furnaces designed by H. H.
Campbell, which could not be forced to work well (Fig. 54).
In these regenerators the hot gases enter and pass out of the
upper part of the chamber. It is evident that in this checker
chamber the gases flow in an inverted channel and, if the depth
of the flowing stream is less than the distance from the arch to
the bottom of the chamber, they will not touch the latter.
Note by English translator.—It may very readily happen that the con-
ductive area of the checkerwork will be sufficient to cause the lower portion
of the checker to reach a high temperature; but at the same time the
frictional resistance to the flow of the gases and air will usually be so great
that this design of checker will not work without forced draft. Horizontal
recuperators are subject to this same defect and it is difficult to secure good
results unless the passages are very short.