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Power Derating
Altitude
=
0.0
m AMSL (Above mean mean sea leve
Pressure variation
=
0.0
Kpa
Barometric Pressure
=
101.3 Kpa at standard reference cond
Humidity
=
30.0 %
Intake air Ambinet temp.
=
40.0 ℃
298
273.15
Charge air coolant temp.
=
55.0 ℃
298
273.15
101.3 KPa
760 mmHg
2.2414 KPa 760 mmHg
16.8 mmHg
743.2
55.0 ℃
vapor pressure
101.3 KPa
Site Design Conditions Altitude
=
Pressure variation
150.0 m AMSL (Above mean mean sea leve
=
Barometric Pressure
101.3 kP kPa-
0
1.1 Kpa
=
101.3 Kp Kpa at site
Humidity
30.0 %
Intake Air Ambinet temp.
40.0 ℃
300
273.15
Radiator cooling air inlet temp. (Indoor type)
40.0 ℃
298
273.15
Charge air coolant temp.
65.5 ℃
280
273.15
101.3 KPa
760 mmHg
2.2414 KPa
16.8 mmHg
760 mmHg
743.2 at temp.
65.0 ℃
101.3 KPa
Mechanical efficiency
=
0.85
=
0.965
=
0.969
Power adjustment factor =
k-0.7(1-k)[1/ηm-1)
^ 0.7 Py =
^ 1.2 Tr
---------
x
Pr
- - - -- - - - - - -
x
Ty
101.3 --------101.3 1
- - - -- - - - - - -
1
^ 1.0 328.15
x
313.15 x
- -- - - - - - - - -
^ 1.2 313.2
x
Tcy
^ 0.7 =
^ 1.0 Tcr
-----------338.65
x
0.968995
= Derating ratio
ISO
1798.0 kW
=
3.1 %
Barometric Pressure
=
99.0 Kp Kpa at standard reference condition
Humidity
=
30.0 %
Intake air Ambinet temp.
=
40.0 ℃
1 쪽
Power Derating
Charge air coolant temp.
=
2 쪽
55.0 ℃
Power Derating
1) Calculation for dew point at standard reference conditions l)
V
=
T
=
40.0 C
=
313.15 K
P
=
ition 24.85 φr
=
24.85 Ra
=
Rv
=
Psr
=
Pv
= =
Pa
= =
ω
=
1 m3
101.3 kPa 30.0 % 0.287 Kj/kg K 0.462 Kj/kg K 7.4715 Kpa φ x Ps
volume for moist air
air ambient temp. barometic pressure(total pressure) relative humidity specific gas constant for air specific gas constant for vapor saturaed vapor pressure partial pressure for vapor
2.2414 kPa P - Pv 99.06 Kpa 0.622 x Pv/(P-Pv)
dry barometric pressure absolute humidity
l) = ma
=
0.0141 Kg(w)/Kg(a) PaV/RaT
mass for dry air per cubic meter
=
1.1022 kg
26.85 mv
=
PvV/RvT=ωma
24.85
=
0.0155 kg
=
0.0155 kg
=
290.00 K
dew point temperature
1.9408 ep
Where, estimate Td by trial and error
2.2414 ap
mehod until ep is equaled to ap
6.85 Td
=
mass for vapor per cubic meter
16.85 C
2) Calculation for dew point at site conditions V T
1) Calculation for dew point level) V T P φ Ra Rv Ps Pv Pa ω
ma nce condtions 3046-1
mv
Td
= = = = = = = = = = = = =
1 m3 40 C 313.15 K 101.3 kPa 60 % 0.287 Kj/kg K 0.462 Kj/kg K 7.4715 Kpa φ x Ps 4.4829 kPa P - Pv 96.82 Kpa 0.622 x Pv/(P-Pv)
= = = = = = =
0.0288 Kg(w)/Kg(a) PaV/RaT mass for dry air pe 1.0773 kg PvV/RvT=ωma mass for vapor per 0.0310 kg 0.0310 kg 290.00 K dew point tempera 1.9408 ep Where, estimate T 4.4829 ap mehod until ep is e 16.85 C
=
volume for moist ai air ambient temp. barometic pressur relative humidity specific gas consta specific gas consta saturaed vapor pre partial pressure for
absolute humidity
1) Calculation for dew point V T
= = = =
P φ Ra Rv Ps Pv
= = = = = = = = = = = = = = = =
Pa ω
ma mv
Td
=
6 쪽
1 40 313.15 100
m3 C K kPa
volume for moist ai air ambient temp. barometic pressur
60 % relative humidity 0.287 Kj/kg K specific gas consta 0.462 Kj/kg K specific gas consta 7.4715 Kpa saturaed vapor pre φ x Ps partial pressure for 4.4829 kPa P - Pv 95.52 Kpa 0.622 x Pv/(P-Pv) absolute humidity 0.0292 Kg(w)/Kg(a) PaV/RaT mass for dry air pe 1.0628 kg PvV/RvT=ωma mass for vapor per 0.0310 kg 0.0310 kg 303.80 K dew point tempera 4.4580 ep Where, estimate T 4.4829 ap mehod until ep is e 30.65 C
Sheet1
r
(total pressure) nt for air nt for vapor ssure vapor
cubic meter cubic meter
ure by trial and error qualed to ap
r
(total pressure) nt for air nt for vapor ssure vapor
