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Washburn, F. E. (ed.) / The Wisconsin engineer
Vol. 5, No. 2 (May 1901)

Zimmerman, O. B.
Some results of a test of heating and ventilating apparatus,   pp. 194-201


Page 200


2iLe I1iscoilsin LEngineer.
degrees lower than that of the eastern. This is largely accounted
for in the fact that the west hot room delivers hot air to 57%
of the room volumes of the building while the eastern section
fed 43%. It was a notable fact also that the west half of the
building was more easily cooled down and also harder to heat
than the east section of the building.
  Our curves for the hot air room show a difference of 60 on
February 28. The average temperature of the rooms on Feb-
rmiary 28, taking separately those fed by the east section and
those fed by the west section, showed averages for east section,
69.30 and west section 70.60. This, however, is accounted for
by the fact that the wind was 20 miles N. E. on that day and as
the building is in a very open location we can easily recognize
why this should be true. On M\arch ist these averages were
reversed when the wind had died down. Only a few of the
room temperatures are here given in Plate II in order to show
types, note particularly the regulation of the thermostats, the
waves of heated and cooling air. By the tangent to these curves
we are enabled to see the speed of rise of temperature and also
its fall. In the chemical laboratory, room 4, note the effect at
I :45 of a class entering and using bunsen burners up to 2 :30.
Curve of room I2 shows a very active thermostat. Room 2I
shows the furious blast of 30' per sec., also note the high speed
of air and irregular action of thermostat in room 25 and As-
semblv Hall. The latter curve is one which was almost dupli-
catecl in the six other temperature curves of this room.
  The gymnasium curve with the curves of the east and west
landings, show, by comparison with the more uniform room
curves, the great advantage of thermostatic control when the
controlling instruments are in normal working condition. Note
on the curve of the east landing the effect of opening the outside
doors at noon time, these dips do not appear in the west landing
because these doors were closed and locked.
  Humidity tests showed the building to average far too low.
On the days of the test the external air was practically saturated
while in the building readings showed an average of 55%. A
record kept during the winter months gave an average less
than 5o%, where it should be 70% for the most healthful con-
clitions.
200


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