Mitsubishi Electric GUG-01SL-E, Техническое руководство

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49
CHAPTER
9
Model selection and capacity calculation
0.94
0.87
16.4 ˚CWB
27 ˚CDB
(2) Air condition difference factor
Specification condition
(A) Air condition difference factor C
2-1
Designing condition
(B) Outdoor air dry-bulb temperature
(C) Dx-coil inlet air wet-bulb temperature
(D) Air condition difference factor C
2-2
(Find C
2-2
from the graph on page 62. )
(E) Total air condition difference factor C
2
= C
2-2
/C
2-1
= (D) / (A) = 0.94 / 1.08
For the quick reference of air condition difference factor C
2
, see the page 63.
1.08
1.0
6.2kW
7.5m
7.1kW
(3) Corrected refrigerant pipe length factor
Read out the refrigerant pipe length factor C
3
using the capacity correction ratio curve on the page 63.
(A) Refrigerant pipe length
(B) Refrigerant pipe length factor C
3
(4) Adjusted Dx-coil unit capacity
(A) Dx-coil unit cooling capacity on the specification
(B) Adjusted Dx-coil unit cooling capacity
C
a
= (A) x C
1
x C
2
x C
3
= 7.1 x 1.0 x 0.87 x 1.0
IV: Calculate the supply air conditions from Dx-coil unit
[RA temperature control]
Dx-coil unit GUG-01SL-E GUG-02SL-E GUG-03SL-E
Connected Lossnay
LGH-
50RVX-E
LGH-
65RVX-E
LGH-
80RVX-E
LGH-
100RVX-E
LGH-
150RVX-E
LGH-
200RVX-E
LGH-
150RVXT-E
LGH-
200RVXT-E
LGH-
250RVXT-E
Air volume [m 3 /h] 500 650 800 1000 1500 2000 1500 2000 2500
Connected Outdoor unit ZRP35 ZRP35 ZRP50 ZRP71 ZRP100 ZRP100 ZRP100 ZRP100 ZRP125
CA (kW) 3.13 3.48 4.35 6.18 8.27 8.7 8.27 8.7 10.88
SHC (kW) 2.10 2.40 3.00 4.08 5.62 6.44 5.62 6.53 9.30
SHF 0.67 0.69 0.69 0.66 0.68 0.74 0.68 0.75 0.83
Dx-coil unit
- -
GUG-02SL-E GUG-03SL-E
Connectable Lossnay
- -
LGH-
80RVX-E
LGH-
100RVX-E
LGH-
150RVX-E
LGH-
200RVX-E
LGH-
150RVXT-E
LGH-
200RVXT-E
LGH-
250RVXT-E
Air volume [m
3
/h]
- -
800 1000 1500 2000 1500 2000 2500
Connected Outdoor unit
- -
ZRP50 ZRP50 ZRP71 ZRP71 ZRP71 ZRP71 ZRP71
CA (kW)
- -
4.35 4.61 6.18 6.44 6.18 6.44 6.79
SHC (kW)
- -
3.00 3.32 5.01 5.47 5.07 5.54 6.14
SHF
- -
0.69 0.72 0.81 0.85 0.82 0.86 0.89
[SA temperature control]
Calculate supply air temperature usig SHF(sensible heat factor) given in the table below.
SHF at the air condition of Outdoor air 27°CDB, 50%RH (19.5°CWB) and Return air 21°CDB, 53%RH (15°CWB).
T
O
= T
i
- SHF x (h
i
- h
O
) / c
q
s
: Sensible Heat
q
t
: Total Heat
SHF : Sensible heat factor (read out from table)
h
i
: Enthalpy of Dx-coil inlet air
h
O
: Enthalpy of supply air from Dx-coil
h
O
= h
i
– C
a
/ (
ρ
x Q
f
/ 3600)
= 45.8 – 6.2 / ( 1.2 x 1000 / 3600)
c : Specific heat capacity of Air
T
i
: Dx-coil inlet air temperature
Using these parameters,
T
O
: Supply air temperature
T
O
= 22.7 - 0.66 x ( 45.8 – 27.2 ) / 1.006
45.8 kJ/kg(DA)
10.5
°C
22.7
°C
1.006 kJ/kg·K
0.66
27.2 kJ/kg(DA)