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12
C.
SELECTION PROCEDURE - STEAM APPLICATION
Example 1:
GIVEN DESIGN CONDITIONS:
Unit Heater Model: BH-63
Steam Pressure: 10 lb
Entering Air Temperature: 70°F
APPLICATION PROCEDURE:
:yticapaC.1
utB
A
utB=
S
rotcaFyticapaCgnitaeHx
=60.1x000,36= rh/utB087,66
si36-HBnafoyticapacdradnatsehT
000,36 .3elbaTmorfrh/utB
rotcafnoisrevnocyticapacgnitaehmaetS
siecnatsmucr
icnevigrof 60.1 .5elbaTmorf
:etasnednoC.2
utB=etaRetasnednoC
A
maetSfotaeHtnetaL/
5.259/087,66= rh/.bl11.07=
.bl01tamaetsfotaehtnetalehT
si 5.259 .8elbaTmorf,.bl/utB
riAlaniF.3
:erutarepmeT
RTA
A
TAF(=
S
TAE-
S
rotcaFesiR.pmeTriAx)
=701x)F°06-F°21(= F°46.55
TAF
A
TAE=
A
RTA+
A
°46.55+F°07= F
F°46.521=
ta36-HBnafoerutarepmetrialanifehT
.dts sisnoitidnoc F°211 .3elbaTmorf
rofrotcafnoisrevnocesirerutarepmetri
A
siecnatsmucricnevig 70.1 .6elbaTmorf
.4gnitnuoM.xaM
:thgieH
HMM
A
HMM=
S
rotcaFnoitcerroCx
=49.0xteef41= eef61.31 t
noitidnoc.dtstathgiehgnitnuom.xamehT
si 41 .3elbaTmorf,teef
sirotcafnoitcerrocthgiehgnitnuomehT
49.0 .7elba
Tmorf
Example 2:
GIVEN DESIGN CONDITIONS:
Vertical Air Delivery requested
Heating Load: 100,000 Btu/hr
Entering Air Temperature: 50°F
Steam Pressure: 2 lb
APPLICATION PROCEDURE:
:noitceleStinU.1
utB
S
utB=
A
rotcaFyticapaCgnitaeH/
=70.1/000,001= rh/utB854,39
tceleS.)snoitidnocdradnatsta( .59-VB
ehtteemlliwledom59-VBna,3elbaTmorF
foyticapacdetarstihtiwstnemeriuqergnitaeh
000,59 .snoitidnocdradnatst
arh/utB
gnitaeHlautcA.2
:yticapaC
snoitidnoclautcata59-VBnafoyticapacehT
utBeblliw
A
utB=
S
rotcaFyticapaCgnitaeHx
=70.1x000,59= rh/utB056,101 .
rofrotcafnoisrevnocyticapacgnitaehmaetS
siecnatsmucricnevig 70.1 .5elbaTmorf