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18
G.
SELECTION PROCEDURE - HOT WATER APPLICATION
:yticapaC.1
utB
A
utB=
S
rotcaFyticapaCgnitaeHx
=272.1x003,44= rh/utB053,65
si95-VBnafoyticapacdradnatsehT
003,44 .9elbaTmorfrh/utB
rotcafnoisrevnocyticapacgnitaehmaetS
siecnatsmucricnevigrof 272.1 .11elbaTmorf
:etaRwolFretaW.2
dradnatssaemaS
anopudesabsi95-VBnoyticapacdradnatsehT
foetarwolfretaw 5.4 .9elbaTmorf,MPG
riAlaniF.3
:erutarepmeT
TAF
A
TAE=
A
TAE+064([+
A
/)
mfCx675(
S
utB/)
A
])1-
TAF
A
/)07+064([+F°07=
=])1-053,65/)0511x675( F°911
si95-VBnafowolfriadradnatsehT 0511 ,MFC
.9elbaTmorf
.4gnitnuoM.xaM
:thgieH
DTW
A
utB=
A
/053,65=)AGx084(/
=)5.4x084( F°90.62
anopudesabsi95-VBnoyticapacdradnatsehT
foetarwolfretaw 5.4 .9elbaTmorf,MPG
gnitnuoM.xaM.5
:thgieH
HMM
A
HMM=
S
rotcaFnoitcerroCx
=68.0xteef41= teef0.21
noitidnocdradnatstathgiehgnitnuom.xamehT
si 41 .9elbaTmorf,teef
sirotcafnoitcerrocthgiehgnitnuomehT
68.0 .41elbaTmorf
Example 1:
GIVEN DESIGN CONDITIONS:
Unit Heater Model: BV-59, Entering Water Temperature: 250°F, Entering Air Temperature: 70°F
APPLICATION PROCEDURE:
Example 2:
GIVEN DESIGN CONDITIONS:
Horizontal Air Delivery requested, Heating Load: 120,000 Btu/hr, Entering Air Temp.: 50°F, Entering Water Temp.:
180°F
:noitceleStinU.1
utB
S
utB=
A
rotcaFyticapaCgnitaeHx
=049.0/000,021= rh/utB066,721
tceleS.)snoitidnocdradnatsta( .561-HB
rofrotcafnoisrevnocyticapacgnitaehretaWtoH
siecnatsmucricnevig 049.0 .11elbaTmorf
gnitaeHlautcA.2
:yticapaC
lautcata561-HBnafoyticapacehT
utBeblliwsnoitidnoc
A
utB=
X
gnitaeHx
=049.0x000,331=rotcaFyticapaC
rh/utB020,521
rofrotcafnoisrevnocyticapacgnitaehretaWtoH
siecnatsmucricnevig 049.0 .11elbaTmorf
riAlaniF.3
:erutarepmeT
TAF
A
TAE=
A
TAE+064([+
A
utB(x)
A
/)
mfCx675(
S
x05+064([x05=])
=])0052x675(/)020,521( F°49
siecnatsmucricnevigrofmfC 0052 morf
.9elbaT
.4erutarepmeTretaW
:porD
DTW
A
utB=
A
MPGx084(/
A
)
=)3.31x084(/020,521= °5.91 F
MPG
A
siecnatsmucricnevigrof 3.31 morf
.9elbaT
gnitnuoM.xaM.5
:thgieH
HMM
A
HMM=
S
tcerroCx rotcaFnoi
=80.1x81= teef4.91
sirotcafnoitcerrocthgiehgnitnuomehT 80.1
.41elbaTmorf
APPLICATION PROCEDURE: