MEES19K180
PURY-HP-T(S)NU-A, Y(S)NU-A
32
8. CAPACITY TABLES
Hyper Heating Inverter R2-Series
0.99
37
Ratio of cooling capacity
Outdoor Temperature [°CD.B.]
Indoor Temperature [°CW.B.]
Ratio of cooling capacity
18
20
0.96
1.02
0.95
Total capacity of indoor unit
V=Outdoor unit capacity
<Cooling>
Design Condition
Outdoor Design Dry Bulb Temperature
37 ºC
Total Cooling Load
18.5 kW
Room1
Indoor Design Dry Bulb Temperature
27 ºC
Indoor Design Wet Bulb Temperature
20 ºC
Cooling Load
9.0 kW
Room2
Indoor Design Dry Bulb Temperature
24 ºC
Indoor Design Wet Bulb Temperature
17.8 ºC
Cooling Load
9.5 kW
<Other>
Indoor/Outdoor Equivalent Piping Length
30 m
1. Cooling Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P36
10.6 kW (Rated)
Room2
PEFY-P36
10.6 kW (Rated)
(2) Total Indoor Units Capacity
P36 + P36 = P72
(3) Selection of Outdoor Unit
The P72 outdoor unit is selected as total indoor units capacity is P72
PUHY-P72
21.1 kW
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Wet Bulb Temperature Correction (20ºC)
1.02 (Refer to Fig.1)
Fig.1
Indoor unit temperature correction
To be used to correct indoor unit only
Fig.2
Outdoor unit temperature correction
To be used to correct outdoor unit only
Fig.3
Correction of refrigerant piping length
Room2
Indoor Design Wet Bulb Temperature Correction (18ºC)
0.96 (Refer to Fig.1)
CTi = Σ (Indoor Unit Rating × Indoor Design Temperature Correction)
= 10.6 × 1.02 + 10.6 × 0.96
= 20.9 kW
(5) Outdoor Unit Correction Calculation
Outdoor Design Dry Bulb Temperature Correction (37ºC)
0.99 (Refer to Fig.2)
Piping Length Correction (30 m)
0.95 (Refer to Fig.3)
Total Outdoor Unit Capacity (CTo)
Total Indoor Units Capacity (CTi)
CTo = Outdoor Rating × Outdoor Design Temperature Correction × Piping Length Correction
= 21.1 × 0.99 × 0.95
= 19.8 kW
(6) Determination of Maximum System Capacity (CTx)
Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 20.9 > CTo = 19.8, thus, select CTo.
CTx = CTo = 19.8 kW
(7) Comparison with Essential Load
Against the essential load 18.5kW, the maximum system capacity is 19.8kW: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTo, thus, calculate by the calculation below
Room1
Maximum Capacity × Room1 Capacity after the Temperature Correction/(Room1,2 Total Capacity after the Temperature Correction
= 19.8 × (10.6 × 1.02)/(10.6 × 1.02 + 10.6 × 0.96)
= 10.2 kW
OK: fulfills the load 9.0kW
Room2
Maximum Capacity × Room2 Capacity after the Temperature Correction/(Room1,2Total Capacity after the Temperature Correction)
= 19.8 × (10.6 × 0.96)/(10.6 × 1.02 + 10.6 × 0.96)
= 9.6 kW
OK: fulfills the load 9.5kW
Go on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.
Piping equivalent length (m)
Cooling capacity correction factor
30
V× 0.5
V× 1.0
V× 1.3
V× 0.75
0000005744.BOOK 32 ページ ２０２０年２月２５日 火曜日 午後５時１９分
