12 psychrometric charts
DESCRIPTION
MEP loadsTRANSCRIPT
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sychrpsychrom
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hat is apsychromechrometric
mperature,
sychrometnts, that ret identifiessfied with comfort
mfort zone.
rometmetric cre (wet y may seou can bnd effecti
a Psycetric chart c processewet bulb t
tric chart cepresent ths the comthe surrouzone, it b.
tric Cchart forbulb aneem ovebegin to ive passiv
hromeis a gra
es includeemperatur
an be usedhe air condfort zone.unding thebecomes p
Chartsr a givend dry b
erwhelmuse the
ve desig
etric Chphical rep
e physical re, humidit
d in two diditions at The comermal condpossible to
s n locatio
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hart ? presentatio
and therty, enthalpy
fferent waya specific
mfort zone ditions. Afto see how
on can td humidirst, by ometric cgies for y
on of the rmodynamy, and air d
ys. The firstime, on tis defined er plotting
w passive d
Pstebecoenst
tell youdity (relalearning chart to your loca
psychrommic properdensity.
st is done bhe chart. Tas the ran
g the air codesign str
sychrometremperaturee used to eomfort, desnergy requtrategies.
informative andhow thinterpre
ation.
metric prorties such
by plottingThen, overnge within onditions arategies ca
ric charts se vs. humidexpress humsign strateg
uirements fo
ation abd absoluhe variabet occup
cesses of as dry b
g multiple dlaying an aoccupants
and overlayan extend
show dity, and caman thermgies, and or those
out te).
bles ant
air. bulb
data area s are ying the
an al
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Examothe
Theexteconpur
Psyc
mple of how plotteer colors represent
e chart is aerior air co
nditions forpose the d
chrometric charts
ed data on a psycht design strategies
lso often uonditions aor the occdata points
show temperature
hrometric chart canthat have been en
used by meand undersupants ins
s move aro
e vs. humidity, and
n be studied, and rnabled to study ho
C
echanical estand the pside a bu
ound the ch
d can be used to ex
related to passive w they can potentClimate Consultan
engineers tprocess thilding. Whhart.
xpress human therm
design. In this chaially expand the co
nt.
to dynamice air must
hen using
rmal comfort, desig
art, the dark blue bomfort zone. This p
cally plot pt go throug
the psych
gn strategies, and
boxes represent thepsychrometric cha
points thatgh to reachrometric
energy requiremen
e comfort zone, anart was generated u
t representh comfortachart for
nts for those strate
d the using
t the able this
egies.
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Ana
Tem
Evetem
Evediag
atomy of th
mperature
ry psychromperature i
ry psychrogonals, and
he Psychro
ometric chncreases fr
ometric chd like dry b
ometric Cha
hart includrom left to
hart also ibulb tempe
art
es verticalo right.
Dry bulb tempera
includes weratures th
Wet bulb temper
l lines tha
ature lines on a ps
wet bulb they increase
rature lines on a ps
t represen
sychrometric chart
temperature from left
sychrometric chart
nt the dry
t
res. Theset to right.
t
bulb tem
e lines are
mperatures.
e indicated
. Air
d at
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Rela
Anocurvcom
Dat
Psydatpsyof adento vcon
ative Humi
other featuved, and b
mmon for t
ta Points
chrometrica points c
ychrometricair qualitiensity of datview summnsider all pa
idity
ure indicatbegin at 10these lines
c charts indcan vary dec chart, or s at a snapta points omer and wiassive desi
ed on eve00% along
to be indic
dicate dataepending if the charp shot in tn the chartinter data ign strateg
ery psychrothe top ofcated in in
Relative humid
a points foupon the
rt was genetime. It cant is used topoints ind
gies in an in
ometric chaf the charttervals of t
dity lines on a psyc
or each loccomputer
erated by hn be hourlyo decipher ependentl
ntegrated m
art is relatt, and decrten.
chrometric chart
cation theyr applicatiohand. Eachy, daily, moaverage cy. But viewmanner.
tive humidrease movi
y are repreon that wah data poinonthly, or onditions. wing them
ity lines. Tng downw
senting. Thas used tont represeneven seasoAt times it
m together
These linesward. It is f
he style ofo generate nts a colleconal data. t can be usallows yo
s are fairly
f the the
ction The
seful u to
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CoTheshasoftand
mfort Zoe comfort ded area itware systed the level
In t
Based on
one zone is ty
is highly vaem, or maof anticipa
this example, we kn
n the data points in
ypically indariable pernually by a
ated clothin
now temperatures
n this example, we
dicated byr climate aa designerng to be w
s greater than 30
e can conclude ave
y shading nd project
r, based upworn by the
C will be considere
erage conditions ar
a portion t. The compon the ace occupant
ed too hot, and les
re between 30 C a
of the psmfort zone
tivity to tas.
ss than 20C will b
and 35 C.
sychrometris either p
ake place i
be considered too c
ric chart. populated bn the build
cold.
This by a ding
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Oth
Hosidbu
TheWe
InSincocchumor cSom
her items thHorizontalchart. Thiscan transpaccountedorizontal lide of the cuoyancy anAlong the similar angmeasurem
e video belather Tool
terpretce psychroupant com
mid, or dry comfortablme commo
hat can be l lines that is useful f
pire to moldd for in the nes that p
chart. This ind air qualiupper left
gle and dirments that a
ow provide.
ting thometric chamfort, somey and arid? le? on example
found on provide deor knowingd and insudesign of
rovide huminformatioity issues. hand side
rection as tare useful fes a good
e Psycarts can proe steadfastHow are y
es of these
some, but ew point teg at what tlation witha building
midity ration aids with
e of the chathe wet bufor understoverview o
chromeovide you t judgmenyour occup
broad con
Temperature (
Humidity (blu
not all psyemperaturtemperaturh decreased.
o/moisture h understan
art at timeslb temperatanding heof the psyc
etric Chwith a rapi
nts can be pants going
nclusions a
(orange = too hot,
ue = too humid, ye
ychrometrire readingsre water wd thermal
content mnding the d
s will be diature lines.eat energy chrometric
hart id overviewmade. Fo
g to feel m
are depicte
blue = too cold)
ellow = too dry
ic charts, as along theill begin toperforman
measuremedensity of
agonal tick. These areneeded, ochart. It fe
w of air conr example,
most of the
ed below.
re as followe right hando condensance if not a
ents along the air, wh
ks/lines plae enthalpy or existing ieatures the
nditions as, is your cltimetoo
ws. d side of thate. Whichccurately
the right hhich relates
aced at a
in the air. e Ecotect
s they relatimate hot
o hot, too c
he h
hand s to
te to and
cold,
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Des
Afteund WhAn WhA cmat Whhig An was
Begin
sign Strate
er understderstand w
en data poexample st
en data poommon stterials.
en relativeh it can be
example os used to g
nning psychrometr
gies and th
tanding hwhat sustain
oints fall totrategy to
oints fall totrategy to
e humidity e decreased
of how thisgenerate al
ric chart, with com
he Psychro
ow your nable desig
o the right achieve th
o the left odo this pa
is too lowd with the
s sort of anl the chart
mfort zones depicte
ometric Cha
climate regn strategi
of the comis would b
f the comfssively is t
w it can be use of des
nalysis cous.
ed for summer andwith
art
eads on aes can be
mfort zone,be to increa
fort zone, yo incorpor
increased iccants.
ld be done
d winter clothing leh no design strateg
a psychrobest used
, you will wase air flow
you will warate solar h
with evapo
e is demon
evels. The chart alsgies.
metric chato improve
want to redw with natu
ant to increheat gains
orative coo
nstrated be
so indicates that o
art, you ce occupant
duce the aiural ventilat
ease the aiwith high
oling. And
elow. Clima
nly 9.5% of occupa
can use itt comfort.
r temperattion.
r temperat thermal m
when it is
ate Consul
ants will be comfo
t to
ture.
ture. mass
too
tant
rtable
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Opportunities for
Natu
r passive solar gain
ural ventilation is
n are combined wi
applied to reduce
ith high mass mate
air temperatures,
erials, in order to r
and occupant com
raise air temperatu
mfort moves up to 1
ures. As a result, oc
10%.
ccupant comfort mmoves up to 29.1%..
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Humidification iss combined with paassive heating, andd occupant comforrt reaches 98.9%.