Civil Engineering Reference
In-Depth Information
Energy consumption
X
¼
Z
(
L
+
T
+
V
)
Electric energy
kWh/year
37,500
90,766
Sm
3
/year
Y
¼
Z
I
Thermal energy
0
53,287
Cold + hot season modes
Recovery system
Equivalent boiler + compressor
Energy consumption
(I)
(II)
EE
¼
X
+
n
Electric energy
kWh/year
112,500
90,766
Sm
3
/year
ET
¼
Y
+
o
Thermal energy
0
514,741
Energy saving (II)
(I )
SE
¼
EE(II)
EE(I)
Electric energy
kWh/year
21,734
SDm
3
/year
ST
¼
ET(II)
ET(I)
Thermal energy
514,741
ST
0
¼
ST
34.325/41,860
TOE/year
422
Cold season mode (design conditions)
Hot season mode (design conditions)
Outdoor
7
C, 19.4
F, relative humidity 90 %
Outdoor 32
C, 89.6
F, relative humidity 50 %
Inlet 22
C, 71.6
F, relative humidity 50 %
Inlet 22-26
C, 71.6-78.8
F, relative humidity 50 %
Cold season mode (average conditions)
Hot season mode (average conditions)
Outdoor 2
C, 35.6
F, relative humidity 90 %
Outdoor 30
C, 86
F, relative, humidity 50 %
Inlet 22
C, 71.6
F, relative humidity 50 %
Inlet 22-26
C, 71.6-78.8
F, relative humidity 50 %
t
) where
t
(
C)
Enthalpy (kJ/kg) per kg of dry air
¼
t
+ humidity ratio
(2,500 + 1.8
Enthalpy (kJ/kg) increase (
e
) per kg dry air
1.8)
Enthalpy (kJ/kg) increase (
E
) per kg dry air
¼
5
(1 + 0.0076
1.8)
Enthalpy (kJ/kg) drop (
Q
) per kg dry air
¼
2
(1 + 0.013
1.8)
LHV of natural gas 34,325 kJ/Sm
3
¼
6
(1 + 0.00825
