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The Indoor Air Handling Unit, commonly known as AHU, is a fundamental component of heating, ventilation, and air conditioning (HVAC) systems designed for indoor environments. Its primary function is to circulate and condition air to maintain comfortable indoor temperatures and air quality for occupants.
Cooling, water volume, water resistance
Cooling conditions: Inlet air dry bulb temperature 27℃, wet bulb temperature 19.5℃, inlet water temperature 7℃, outlet water temperature 12℃
|
Model |
Two-row pipe |
Four-row pipe |
six-row pipe |
eight-row pipe |
||||||||
|
cooling(KW |
Water volume(m³/h) |
Water resistance (KPa) |
cooling(KW) |
Water volume (m h) |
Water resistance (KPa) |
cooling(kW) |
Water volume (m³/h) |
Water resistance (KPa) |
cooling (KW |
Water volume (m³/h) |
Water resistance (KPa) |
|
|
ZK-05 |
18.8 |
3.23 |
10.1 |
29.4 |
5.01 |
9.76 |
37.8 |
6.49 |
16.99 |
45.7 |
7.85 |
10.44 |
|
ZK-10 |
34.7 |
5.89 |
10.5 |
58.6 |
10.35 |
11.65 |
75.4 |
12.96 |
10.08 |
91.2 |
15.70 |
12.82 |
|
ZK-15 |
53.4 |
9.16 |
9.8 |
87.9 |
15.08 |
7.21 |
113.1 |
19.5 |
12.11 |
136.8 |
23.52 |
15.12 |
|
ZK-20 |
70.6 |
12.14 |
9.8 |
117.3 |
20.16 |
8.25 |
150.8 |
26.21 |
14.07 |
182.4 |
31.96 |
17.48 |
|
ZK-25 |
92.9 |
15.83 |
11.6 |
146.1 |
25.12 |
10.24 |
188.1 |
33.90 |
11.77 |
227.5 |
39.11 |
14.76 |
|
ZK-30 |
113.6 |
19.2 |
11.8 |
175.2 |
30.12 |
11.16 |
225.6 |
38.90 |
13.10 |
273.4 |
47.00 |
16.28 |
|
ZK-40 |
144.4 |
24.82 |
12.4 |
232.8 |
40.03 |
12.93 |
300.2 |
51.61 |
15.73 |
362.2 |
62.27 |
19.20 |
|
ZK-50 |
180.5 |
30.61 |
10.4 |
292.3 |
50.25 |
7.47 |
375.3 |
64.52 |
17.00 |
435.80 |
74.93 |
15.70 |
|
ZK-60 |
216.6 |
37.24 |
9.4 |
349.2 |
60.04 |
7.47 |
450.3 |
77.42 |
17.00 |
544.80 |
93.67 |
15.70 |
|
ZK-80 |
287.2 |
49.1 |
9.1 |
464.6 |
79.88 |
8.5 |
598.4 |
102.89 |
19.5 |
724.8 |
124.62 |
17.9 |
|
ZK-100 |
357.0 |
61.38 |
9.5 |
578.2 |
99.41 |
8.5 |
746.5 |
128.35 |
19.5 |
904.2 |
155.46 |
17.9 |
|
ZK-120 |
428.4 |
73.65 |
9.5 |
693.6 |
118.91 |
8.5 |
895.2 |
153.91 |
19.5 |
1084.8 |
186.51 |
17.9 |
|
ZK-160 |
591.2 |
101.65 |
11.2 |
921.6 |
158.48 |
10.3 |
1190.4 |
204.67 |
20.1 |
1443.2 |
255.93 |
32.4 |
|
ZK-200 |
740.1 |
127.25 |
12.8 |
1152.2 |
199.3 |
13.1 |
1488.1 |
255.86 |
26.4 |
1804.3 |
310.22 |
42.4 |
Note: The performance parameters of the unit at a headwind speed of 2.5m/s
Cooling condition correction factor
|
air temperature |
Water temperature℃ |
|||||
|
Wet bulb Temperature |
Dry bulb Temperature |
5/10 |
6/11 |
7/12 |
8/13 |
9/14 |
|
17 |
19-27 |
0.83 |
0.76 |
0.67 |
0.62 |
0.57 |
|
18 |
20-30 |
0.94 |
1.85 |
0.76 |
0.68 |
0.58 |
|
19 |
21-31 |
1.07 |
0.97 |
0.88 |
0.79 |
0.71 |
|
19.5 |
21-33 |
1.15 |
1.06 |
1.00 |
0.86 |
0.78 |
|
20 |
22-33 |
1.20 |
1.10 |
1.03 |
0.90 |
0.81 |
|
21 |
23-36 |
1.34 |
1.24 |
1.14 |
1.03 |
0.93 |
|
22 |
24-39 |
1.48 |
1.38 |
1.28 |
1.18 |
1.07 |
|
23 |
25-42 |
1.63 |
1.53 |
1.43 |
1.32 |
1.22 |
|
24 |
26-45 |
1.79 |
1.69 |
1.59 |
1.47 |
1.36 |
|
25 |
27-48 |
1.75 |
1.64 |
1.53 |
||
|
26 |
28-48 |
1.92 |
1.81 |
1.70 |
||
|
27 |
29-48 |
2.09 |
1.98 |
1.87 |
||
|
28 |
30-50 |
2.26 |
2.16 |
2.05 |
||
|
29 |
31-52 |
2.40 |
2.32 |
2.2 |
||
|
Headwind speed |
2.0 |
2.3 |
2.5 |
2.7 |
3.0 |
3.3 |
3.5 |
|
coefficient |
0.81 |
0.92 |
1.0 |
1.07 |
1.17 |
1.26 |
1.32 |
|
air temperature |
Water temperature℃ |
|||||
|
Wet bulb Temperature |
Dry bulb Temperature |
5/10 |
6/11 |
7/12 |
8/13 |
9/14 |
|
18 |
20-30 |
0.90 |
0.74 |
0.60 |
0.49 |
0.36 |
|
19 |
21-31 |
1.13 |
0.95 |
0.77 |
0.65 |
0.54 |
|
19.5 |
21-33 |
1.35 |
1.15 |
1.00 |
0.78 |
0.63 |
|
20 |
22-33 |
1.41 |
1.20 |
1.05 |
0.82 |
0.67 |
|
21 |
23-36 |
1.72 |
1.49 |
1.27 |
1.06 |
0.86 |
|
22 |
24-39 |
2.08 |
1.82 |
1.57 |
1.34 |
1.12 |
|
23 |
25-42 |
2.48 |
2.20 |
1.93 |
1.66 |
1.14 |
|
24 |
26-45 |
2.95 |
2.62 |
2.33 |
2.03 |
1.76 |
|
25 |
27-48 |
2.78 |
2.46 |
2.16 |
||
|
26 |
28-48 |
3.30 |
2.94 |
2.60 |
||
|
27 |
29-48 |
3.80 |
3.50 |
3.12 |
||
|
28 |
30-50 |
4.14 |
4.10 |
3.70 |
||
|
29 |
31-52 |
4.14 |
4.10 |
3.70 |
||
Correction Factor K4 for Water Resistance under Different Inlet Air and Water Temperatures
|
Headwind speed |
2.0 |
2.3 |
2.5 |
2.7 |
3.0 |
3.3 |
3.5 |
|
coefficient |
0.9 |
0.96 |
1.0 |
1.04 |
1.1 |
1.16 |
1.2 |
Ps:1.The above correction factors are determined based on the average values of various units. For small units (05~15), multiply by 0.95; for large units (50-200), multiply by 1.08.
2.The above correction factors are approximate values and are for reference only.
Correction under different wind speeds, inlet air temperature, and water temperature conditions:
Actual cooling capacity = Cooling capacity from Table 1 × K1 × K3
Actual water flow = Water flow from Table 1 × K1 × K3
Actual water resistance = Water resistance from Table 1 × K2 × K4
Example: Selecting YG-20 air conditioner, the cooling coil face wind speed is 2.5 m/s. According to Table 1, the cooling capacity is 150.8 kW, water flow is 26.21 m³/h, and water resistance is 14.07 kPa. Determine the actual cooling capacity, water flow, and water resistance when the inlet air dry-bulb temperature is 27°C, wet-bulb temperature is 21°C, inlet water temperature is 7°C, and outlet water temperature is 12°C.
Solution: From Table K1, the correction factor K1 = 1.14. From Table K2, the correction factor K2 = 1.27.
Therefore:
Actual cooling capacity (Q) = Standard condition cooling capacity × K1 = 150.8 × 1.14 = 171.91 kW
Actual water flow (V) = Standard condition water flow × K1 = 26.21 × 1.14 = 29.88 m³/h
Actual water resistance (P) = Standard condition water resistance × K2 = 14.07 × 1.27 = 17.87 kPa
Heating, water volume, water resistance
Heating conditions: air inlet temperature 15℃, water inlet temperature 60℃
|
Model |
Two-row pipe |
four-row pipe |
six-row pipe |
eight-row pipe |
||||||||
|
Heating(KW) |
Water volume (m/h) |
Water resistance (KPa) |
Heating (KW |
Water volume (mh) |
Water resistance (KPa) |
Heating (KW) |
Water volume (m³h) |
Water resistance (KPa) |
Heating(KW) |
Water volume m/h) |
Water resistance (KPa) |
|
|
ZK-05 |
34.1 |
3.23 |
10.1 |
50.6 |
5.01 |
9.76 |
59.2 |
6.49 |
16.99 |
77.1 |
7.85 |
10.44 |
|
ZK-10 |
67.1 |
5.89 |
10.5 |
99.8 |
10.35 |
11.65 |
124.8 |
12.96 |
10.08 |
151.0 |
15.70 |
12.82 |
|
ZK-15 |
101.8 |
9.16 |
9.8 |
149.7 |
15.08 |
7.21 |
173.5 |
19.5 |
12.11 |
205.1 |
23.52 |
15.12 |
|
ZK-20 |
135.6 |
12.14 |
9.8 |
199.0 |
20.16 |
8.25 |
248.8 |
26.21 |
14.07 |
289.3 |
31.96 |
17.48 |
|
ZK-25 |
168.7 |
15.83 |
11.6 |
249.5 |
25.12 |
10.24 |
311.2 |
33.90 |
11.77 |
353.3 |
39.11 |
14.76 |
|
ZK-30 |
202.6 |
19.2 |
11.8 |
304.5 |
30.12 |
11.16 |
380.9 |
38.90 |
13.10 |
448.3 |
47.00 |
16.28 |
|
ZK-40 |
270.4 |
24.82 |
12.4 |
399.2 |
40.03 |
12.93 |
480.8 |
51.61 |
15.73 |
592.4 |
62.27 |
19.20 |
|
ZK-50 |
337.3 |
30.61 |
10.4 |
512.3 |
50.25 |
7.47 |
556.8 |
64.52 |
17.00 |
641.8 |
74.93 |
15.70 |
|
ZK-60 |
404.7 |
37.24 |
9.4 |
609.4 |
60.04 |
7.47 |
581.2 |
77.42 |
17.00 |
766.8 |
93.67 |
15.70 |
|
ZK-80 |
539.5 |
49.1 |
9.1 |
796.0 |
79.88 |
8.5 |
386.2 |
102.89 |
19.5 |
1006.0 |
124.62 |
17.9 |
|
ZK-100 |
674.5 |
61.38 |
9.5 |
985.1 |
99.41 |
8.5 |
1127.6 |
128.35 |
19.5 |
1272.3 |
155.46 |
17.9 |
|
ZK-120 |
808.9 |
73.65 |
9.5 |
1185.9 |
118.91 |
8.5 |
1362.5 |
153.91 |
19.5 |
1533.6 |
186.51 |
17.9 |
|
ZK-160 |
1077.8 |
101.65 |
11.2 |
1576.0 |
158.48 |
10.3 |
1688.4 |
204.67 |
20.1 |
2083.2 |
255.93 |
32.4 |
|
ZK-200 |
1346.2 |
127.25 |
12.8 |
1970.8 |
199.3 |
13.1 |
2032.7 |
255.86 |
26.4 |
2606.2 |
310.22 |
42.4 |
Note: 1. The unit's performance reference at a headwind speed of 2.5m/s
2. The coil is a dual-purpose coil for hot and cold applications
- Filtration and Purification:AHUs are equipped with filtration systems to remove dust, pollen, and other contaminants from the air, ensuring clean and healthy indoor air quality.
- Temperature Control:These units regulate indoor temperatures by heating or cooling the air as required, providing a comfortable environment regardless of external weather conditions.
- Humidity Control:Indoor AHUs have the capability to control humidity levels, preventing excessive moisture buildup or dryness in the air, which contributes to occupant comfort and health.
- Energy Efficiency:Many indoor AHUs are designed with energy-efficient components and features, such as variable-speed fans and heat recovery systems, to minimize energy consumption and reduce operating costs.
- Quiet Operation:Noise reduction features are integrated into indoor AHUs to ensure quiet operation, making them suitable for use in noise-sensitive environments like offices and residential buildings.
- Customization Options:AHUs come in various sizes and configurations to accommodate different indoor spaces, allowing for customization based on specific requirements and preferences.
- Residential Buildings: Provide heating, cooling, and ventilation for homes and apartments to maintain comfortable indoor environments for residents.
- Commercial Buildings: Regulate indoor temperatures and air quality in offices, retail stores, restaurants, and other commercial spaces to enhance comfort and productivity.
- Educational Institutions: Ensure proper ventilation and air quality in schools, colleges, and universities to create a healthy learning environment for students and staff.
- Healthcare Facilities: Control airborne contaminants and maintain sterile environments in hospitals, clinics, and medical offices to safeguard patient health.
- Hospitality Industry: Deliver comfortable indoor environments in hotels, resorts, and lodges to enhance guest satisfaction and comfort during their stay.
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