McQuay MWM 007F, Руководство пользователя

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13
2
nd
Step:
To obtain the Total capacity and Sensible capacity for
(a) Indoor Condition: 23°C DB , 15°C WB
Outdoor Condition: 35°C DB
Outdoor DB, °C
35
Indoor DB
°C
Indoor WB
°C
TC (kW) SC (kW)
20 15 2.506 1.363
23 15 x
3
y
3
24 15 2.506 1.931
Total capacity, TC
⇒
3
x = 2.506kW (Same as Total capacity at 20 °C Indoor DB / 15 °C Indoor WB & 35 °C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
3
y kW 931 . 1
1.363kW kW 931 . 1
C 23 C 24
C 20 C 24
−
−
=
− °
−
°
° °
⇒
3
y = 1.789kW
(b) Indoor Condition: 23°C DB , 15°C WB
Outdoor Condition: 40°C DB
Outdoor DB, °C
40
Indoor DB
°C
Indoor WB
°C
TC (kW) SC (kW)
20 15 2.311 1.205
23 15 x
4
y
4
24 15 2.311 1.773
Total capacity, TC
⇒
4
x
= 2.311kW (Same as Total capacity at 20 °C Indoor DB / 15 °C Indoor WB & 40 °C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
4
y kW 773 . 1
1.205kW kW 773 . 1
C 23 C 24
C 20 C 24
−
−
=
− °
−
°
° °
⇒
4
y = 1.631kW
*
This is due to 2 different conditions with same WB temperature will have the same level of enthalpy. For
more details, please refer to psychrometrics chart