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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
80-6 Environmental
80.1.4 Psychrometer
Two thermometers are ventilated with the gas of unknown humidity. One sensor, the dry bulb, mea-
sures
th
e
ga
s
te
mperature
t. e ot
her
se
nsor,
th
e
we
t
bu
lb,
is su
rrounded
by a wi
ck
sa
turated
wi
th
pu
re
wa
ter
. e en
ergy
re
quired
to ev
aporate
wa
ter
in
to
th
e
ai
r
st
ream
co
ols
th
e
we
t
bu
lb
to a te
mperature
t
w
.
e v
apor
p
ressure
e i
n
t
he
s
ampled
g
as
i
s
c
alculated
w
ith
t
he
p
sychrometer
e
quation:
e e A P t t=
w w
( )
(80.2)
where
e
w
is the saturated vapor pressure at temperature t
w
P is the total atmospheric pressure
A
i
s
t
he
p
sychrometer
c
oecient
A
de
pends
on ve
ntilation
sp
eed,
di
mensions
of th
e
we
t
bu
lb,
an
d
ra
diative
he
at
ex
change
be
tween
bo
th
dr
y
an
d
we
t
bu
lbs
an
d
th
eir
su
rroundings
. e at
tractiveness
of ...
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Publisher Resources

ISBN: 9781439848913