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August 26, 2023
[China Aluminum Industry Network] Qingfeng has experienced more than ten years of development, and has created the Qingfeng brand, which is known for its high efficiency and reliability. After research and development and user comparison of data, it verified the energy efficiency of Qingfeng variable frequency magnetic levitation chiller.
First, the main features of Qingfeng Maglev frequency conversion chiller:
Frequency conversion: The compressor has a built-in Frequency Converter, which can realize accurate temperature control over a wide range. The impact of the frequency conversion soft-start grid is reduced by 90%, and the low startup current is 2A, which increases the service life of the motor. Unit frequency: 0 ~ 800HZ higher speed: 48000 rev / min.
Magnetic levitation: Using magnetic levitation technology, the mechanical movement is non-contact and the mechanical loss is reduced to zero.
No oil: The compressor does not need lubricating oil, and the whole refrigeration system has no lubricating oil, and the heat exchange performance of the heat exchanger is improved by 10%. There is no need to change the lubricant when servicing the equipment.
Efficient: The COP of the unit is up to 7.5kw/kw and IPLV: 13.0kw/kw. When the water temperature is 20°C, the unit is still safe to operate. The higher energy efficiency COP is 36.86kw/kw.
Safety: The unit has complete protection functions, and all the operating parameters of the compressor can be displayed digitally
Environmental protection: The refrigerant adopts R134a refrigerant with ODP of 0. Non-flammable, non-explosive, non-toxic, non-irritating, non-corrosive, non-chlorinated, no damage to the ozone layer.
Low noise: The unit runs smoothly, and the noise of inorganic motion reduces the noise by 10%.
Remote control: As long as there is a network, you can view the operating status of the unit, automatically pre-alarm, send alarm information.
Second, the main parameters
Cooling capacity: 530～2100kw/h
Larger operating power: 100 to 400kw/h
Operating frequency: 0 ~ 800HZ
Speed: 0-48,000 rpm.
Third, the unit schematic:
Fourth, the main configuration of the unit
Part Name
model
Brands
Brand origin
Magnetic levitation compressor
/
Danfoss (TURBOCOR)
United States
Inverter
/
Danfoss
United States
Magnetic suspension bearings
/
Danfoss
United States
Electronic expansion valve
/
Danfoss
United States
Refrigerant
R134a
DuPont
United States
Pressure Sensor
/
EMERSON/KF
United States/Zhejiang
Drying filter
/
EMERSON
United States
Temperature Sensor
/
EMERSON
United States
Sight glass
/
EMERSON
United States
Computer Control/PLC
S7-200
SIEMENS
Germany
touch screen
10-inch color screen
SIEMENS
Germany
Reactor
/
Jingxin
Shanghai
Safety valve
/
Dong Zi
Shanghai
Flow switch
/
KF
Zhejiang
Condenser
/
KF
Zhejiang
Evaporator
/
KF
Zhejiang
V. Economic Benefits
Magnetic suspension centrifugal unit
1) The higher energy efficiency ratio at the 18°C working condition is as high as 36.86kw/kw, and the energy efficiency ratio of the ordinary screw machine is about 6.0kw/kw;
2) The ordinary screw chiller lubricant maintenance costs 15,000 yuan / year, magnetic levitation units do not need oil maintenance costs;
3) The energy efficiency ratio of the magnetic levitation unit is influenced by the lower temperature of the cooling inlet water. The lower the inlet water temperature is, the higher the energy efficiency ratio is. See the following calculations.
Table 1-2 Lishui Weather Query Form 2014
month
1
2
3
4
5
6
7
8
9
10
11
12
Average temperature (°C)
17.26
18.7
19.42
24.1
26.2
30.1
34.3
33.52
28.4
28.4
24.4
17.1
Table 1-2 Magnetic Suspension Centrifuge Test Data Sheet
No.
Freezing water temperature (°C)
Freezing water temperature (°C)
Cooling water temperature (°C)
Cooling water temperature (°C)
Load kcal*104
Cooling capacity (kw)
Power (kw)
Energy efficiency ratio
Cooling water inlet temperature 20°C
1
20.78
18.92
21.09
24.17
47.2
593.8
38.52
15.42
2
20.82
19.34
20.97
23.49
40.1
469.7
22.67
20.72
3
20.78
19.45
20.95
23.14
37.95
423.97
18.12
23.4
4
20.84
19.67
20.87
22.9
31.9
374.6
14.04
26.69
5
20.76
20.3
20.81
22.03
15.4
233.7
6.34
36.86
Cooling water inlet temperature 25°C
1
22.74
20.67
25.33
28.87
56.8
660.71
53.98
12.24
2
22.36
20.65
25.19
28.26
47.2
549
39.68
13.84
3
21.87
20.41
25
27.54
40.1
466.5
28.07
16.62
4
21.63
20.25
25.31
27.67
37.95
441.5
24.725
17.86
5
21.68
20.51
25.4
27.22
31.9
371.38
17.975
20.66
6
21.11
20.55
25.69
26.66
15.4
179.11
8.075
22.18
Cooling water inlet temperature 30°C
1
22.74
20.39
30.33
34.44
65
750.5
89.91
8.35
2
22.54
20.47
30.56
34.16
55
654.89
71.1
9.21
3
22.04
20.27
30.33
33.49
48.5
565.31
52.11
10.85
4
21.9
20.41
30.29
32.68
41
475.3
37.2
12.78
5
22.24
20.91
30.11
32.13
36.5
424.22
29.8
14.24
6
21.72
20.59
30.34
32.46
31
360.89
25.73
14.03
7
20.95
20.38
30.21
31.22
16
181.91
13.12
13.87
a) In the first group, 1, 2, 3, 4, 11 and 12 months (total 6 months), the ambient temperature is lower than 25°C, and the cooling water inlet temperature is calculated as 20°C.
b) The ambient temperature of the second group of 5, 6, 9 and 10 (for a total of 4 months) is less than 30°C, and the cooling water inlet temperature is calculated at 25°C.
c) The third group of July and August (for a total of 2 months) has an ambient temperature of less than 35°C, and the cooling water inlet temperature is calculated at 30°C.
Rely on the front group to save electricity
name
Cooling capacity (KW)
Power (KW)
Energy Efficiency (COP)
Running time (month)
Running time (h)
Electricity fee (yuan/degree)
Operating expenses (yuan)
Maglev operation costs
374.6
14.04
26.69
6
4320
0.67
$40637.3
Screw unit operating costs
374.6
62.4
6.00
6
4320
0.67
¥180610.5
Power-saving cost of magnetic levitation unit = operating cost of magnetic levitation unit - operating cost of screw-type unit
¥139973.2
The second group of power-saving calculations
name
Cooling capacity (KW)
Power (KW)
Energy Efficiency (COP)
Running time (month)
Running time (h)
Electricity fee (yuan/degree)
Operating expenses (yuan)
Maglev operation costs
441.5
24.725
17.86
4
2880
0.67
¥47709.4
Screw unit operating costs
441.5
73.5
6.00
4
2880
0.67
¥141825.6
Power saving cost of magnetic levitation unit = operating cost of magnetic levitation unit - operating cost of screw unit
¥94116.2
The third group of power-saving calculations
name
Cooling capacity (KW)
Power (KW)
Energy Efficiency (COP)
Running time (month)
Running time (h)
Electricity fee (yuan/degree)
Operating expenses (yuan)
Maglev operation costs
424.22
29.8
14.24
2
1440
0.67
¥28751
Screw unit operating costs
424.22
70.7
6.00
2
1440
0.67
¥68214.5
Power saving cost of magnetic levitation unit = operating cost of magnetic levitation unit - operating cost of screw unit
¥39463.5
Total annual savings (yuan)
$273552.9
Zhejiang Qingfeng Environment Co., Ltd. Contact: Manager Zhu Address: No. 62 Tongji Street, Shuige Industrial Zone, Lishui City, Zhejiang Province -888
Fax:
Email:
company website:
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