Sanyo ECO G SGP-EW120M2G2W, Технические данные инструкция

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System Design
1. System Configuration
D-4
(2) Example of calculation of actual performance
[Example calculation conditions]
Indoor units: Six type 112 units, and four type 140 units
Outdoor units: Two type 560 W-Multi outdoor units
Indoor/outdoor temperatures: cooling (indoors 22°CWB, outdoors 33°CDB); heating (indoors
22°CWB, outdoors 3°CDB)
Height difference between indoor/outdoor units: Outdoor unit is higher by no more than 50m
Refrigerant effective piping length: 120m
1) Indoor unit cooling capability
Outdoor unit rated cooling capacity
Note 1
= 56.0 + 56.0 = 112.0 (kW)
Indoor unit rated cooling capacity
Note 3
Type 112 = 11.2 kW, type 140 = 14.0 kW
Total rated cooling capacity of indoor units
Note 5
= 123.2 (kW)
11.2×6+14.0×4=123.2
From the performance table, the correction factor for temperatures and connected capacity
Note 7
= 1.08
The connected capacity of the indoor units as a percentage of the outdoor capacity is (123.2 ÷ 112.0) × 100 = 110%.
Next obtain the correction factor for each outdoor unit. From the 110% air conditioner capacity table for
each outdoor unit, note the value at the crossover point of the indoor wet bulb temperature 22
°
CWB and
the outdoor air temperature 33
°
CDB, and then divide the value by 100.
The correction factor for type 560 outdoor units is: 107.9% 1.079
1.079 × 560 + 1.079 × 560
560 + 560
The correction factor for piping length
Note 8
= 0.86
From the “Performance correction for refrigerant piping length” table for the selected unit type, note the
crossover point for the equivalent length of 120m and the height difference of 50m, which is 86%, and
divide this by 100.
a) Cooling capacity of each indoor unit
Indoor unit type 112 cooling capability = Note 1 × Note 3 ÷ Note 5 × Note 7 × Note 8
= 112.0 × 11.2 ÷ 123.2 × 1.08 × 0.86
≅
11.0 kW
Calculating the same way, Type 140 provides 13.7 kW.
b) Total cooling capability of the indoor units is therefore 11.0 × 6 + 13.7 × 4 = 120.8 kW.
2) Indoor unit heating capability
Outdoor unit rated heating capacity
Note 1
= 63.0 + 63.0 = 126.0 (kW)
Indoor unit rated heating capacity
Note 3
Type 112 = 12.5 kW, type 140 = 16.0 kW
Total rated heating capacity of indoor units
Note 5
= 139.0 (kW)
12.5 × 6 + 16.0 × 4 = 139.0
From the performance table, the correction factor for temperatures and connected capacity
Note 7
= 1.025
Indoor unit selection was based upon cooling capacity, so the connected capacity of the indoor units as a
percentage of the outdoor unit capacity is (123.2 ÷ 112.0) × 100 = 130%
Next obtain the correction factor for each outdoor unit. Read the values for 22ºCWB from the 110% heating
capacity table for each outdoor unit, and the value in the table for outdoor temperature of 3ºCDB, and divide by 100.
The correction factor for type 560 outdoor units is: 102.5% 1.025
1.025 × 63.0 + 1.025 × 63.0
63.0 + 63.0
The correction factor for piping length
Note 8
= 0.954
From the “Performance correction for refrigerant piping length” table for the selected unit type, note the
crossover point for the equivalent length of 120m and the height difference of 50m, which is 95.4%, and
divide this by 100.
a) Heating capacity of each indoor unit
Indoor unit type 112 heating capability = Note 1 × Note 3 ÷ Note 5 × Note 7 × Note 8
= 126.0 × 12.5 ÷ 139.0 × 1.025 × 0.954
≅
11.6 kW
Calculating the same way, type 140 provides 14.8 kW.
b) Total heating capability of the indoor units is therefore 11.6 × 6 + 14.8 × 4 = 128.8 kW.
System correction factor = = 1.08
System correction factor = = 1.025