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New centrifugal chiller - Prieto Nouel · 2017. 7. 26. · Big capacity...
Transcript of New centrifugal chiller - Prieto Nouel · 2017. 7. 26. · Big capacity...
Creates a better life
Midea L Series Centrifugal Chiller
Creates A Better Life
2009-11-9
1300,1400,1500,1600,1700,1800,1900,2000;Big capacity350,400,450,500,550,600;Small capacity650,700,750,800,850,900,950,1000,
1100,1200.Middlecapacity
Cooling capacity (RT)
L C 1500 M 6
“ ” Smart star Centrifugal chiller
R134a refrigerant Midea Centrifugal Chiller,
Nominal cooling capacity 1500 RT
Power 415 omite 6 6 6 6kV 10 10 11kV:380- V ; - / . ; - /
Midea G2 Centrifugal Chiller
Chiller System Working Principle
Centrifugal Compressor
Adjustable guide vane
Movable diffuser
Balance pipe
High position oil-tank
Driving gear
Motor shaftMotor end thrust bearing
ImpellerOil seal
Radial bearing of small gear Small
gear shaft
Axial bearing of driving gear Labyrinth seal
Spraying pipe
Capacity Adjustment
Patent design:(Patent no. :ZL01 2 56824.4)Adjustable inlet guide vane cooperate with movable diffuser, ensures the refrigerant gas enters into impeller at best angle, and achieves best efficiency at various load percentage
High efficiency (95%) cantilever motor and good gearing system, leads to low mechanical loss, lower winding temp. rise, low noise, and longer lifespan
Adjustable inlet guide vane plus movable diffuser, leads to steplesscontrol and wide range cooling capacity,10% ~ 100%.
Excellent part-load performance
Patent design (patent no. : ZL01 2 56825.2)
Capacity Adjustment
Advanced designing software: NREC compressor designing software
Advanced stress analysing software: ANSYS(flow passage analysis, stress analysis, efficency and lifespan)
Advanced rotor dynamics software: DYROBES
Advanced Software Adopted
High speed impeller
104 rotating speed
How to balance itself
How to balance when it is coupled with the shaft
Impeller
Impeller Manufacturing Process
Overspeed test Zeiss 4-axis coordinate measuring
NREC designing software GMD 5-axis machining center Balancing test
Key coupling
Power-transmission surface
Stress-consentrationlocation
Power-transmission surface
KeylesscouplingPower-transmission
surface
Keyless Coupling
◇The impeller and the main shaft
are coupled by keyless
connection, which was awarded
by national patent.
◇ Patent no.: ZL 01 2 56824.4
Keyless Coupling
Internal integrated oil pump adopts separate power supply ,ensures the lubricating system is reliable
High position oil tank ensures there still have lubricant oil supplying when there is sudden power loss.
Oil heater and oil cooler ensures the oil temp. always meet the requirement.
External oil cooler and oil filter makes convenient maintenance.
Lubrication System
Biggest chiller testing lab in Asia, ranges of 140KW~
8000KW
Testing Center
Liquid surface
Copper pipesRefrigerant inlet
管外侧(冷媒侧)
管内侧(冷水侧)
Evaporator inside view
High-efficiency Heat-exchanger
Condensing heat-exchanging surface fins
PeristomePassage
High-efficiency condensing pipe
High-efficiency evaporating pipe
• Optional fouling factor : 0.086m2·℃/KW or 0.044/0.0176m2·℃/KW;
• Ensures the chiller suits to different water quality for different area, prolong the maintenance cycle.
Fouling factor
• High efficiency oil reclaim system • Automatic running (manual running available as well)
Oil Reclaim System
• Low noise gearing system
Low Noise
PositivePositiveNegativeEvaporating pressure
6.986.947.44Theoretic refrigeration cycle efficiency
Pressurized vessel
Pressurized vessel
Non-pressurized
vessel
Condenser & Evaporator
13.3 year14 year1.4 yearLifespan in atmosphere
1700(0.32~0.37)
1300(0.24~0.29)
93(0.017~0.02)
Global warming potential
(GWP)
0.0500.02Ozone depletion potential (ODP)
R22R134aR123Refrigerant
Environment-friendly refrigerant
R134a Refrigerant
Cabinet Plug PLCTransmitor
Air switch
Terminals
Fan
Wire inlet Wire slotGrounded bolt
Regulated power supply
RelayTransmition
module
Human-machine interface
Door lock
Comunication wire
Emergency stop
Control Box
More than 30 kinds of controls and protections
The parameters of recent 10 times of malfunctions will be recorded
Touchable Screen
Maximum 32 units of chiller can be centralized
Tele start/stop available
Central Control System
Power supply
Starter panel
To air side lode ( )
To control panel power supply
To oil pump power supply
To starter power supply
From cooling towervia cooling water pump
Com
pm
oto
rpo
wer
.
Con
trol
sign
al
Stop valve
Flexible joint
To cooling tower
Fromvia cooling water pump
air side lode ( )
Water drainage valve
Installation and Piping
Easy maintenance
Required Maintenace Space
Optional cut-valve on condenser inlet & outlet pipe, so as to storing refrigerant in condenser
Condenser
Optional customization
Compressor, evaporator & condenser customization
The chilled/cooling water temp. can be customized
Any cooling capacity from 200RT~4000RT
Dual compressor unit available
Special control system based on demand
Multi-power supply, high voltage power supply
Explosion-proof control box and all the other electric components available
VSD centrifugal chiller available
SKD available
Optional customization
Operation costOperation cost
First investmentFirst investment
SafetySafety
Change the power supply of big capacity compressor from 380V to 6000V or 10000V
High Voltage Centrifugal Chiller
From 1980s,Chongqing General started to supply hihgvoltage centrifugal chiller
After 20 years experience, we have hundreds of successful projects.
High Voltage Centrifugal Chiller
“Code for Electrical Design of Civil Buildings”: [The electrical appliances whose capacity ranges 250KW or requires using transformer with capacity exceeding 160KVA shall supply power through the high voltage mode.]
Is it safe!Is it safe!
High Voltage Centrifugal Chiller
Applicable for unit refrigerating capacity ≥500RT, the higher the capacity is, the more obvious the advantage is.
It reduce the initial investment !It reduce the initial investment !
High Voltage Centrifugal Chiller
Save wire cabinet and low Save wire cabinet and low voltage start cabinet etc.voltage start cabinet etc.
Save on electricity costsSave on electricity costs
Save 10kV /380V Save 10kV /380V transformertransformer
Save cost for cablesSave cost for cables
Save cost for civil Save cost for civil engineering for equipmentsengineering for equipments
High Voltage Centrifugal Chiller
It saves the operation cost!It saves the operation cost!
The designed efficiency of high voltage motor is higher than low voltage motor
There is transformer loss in low voltage system
The power factor of high voltage motor is higher than low voltage motor
The starting current and running current of high voltage unit is lower , so its heating loss is lower
High Voltage Centrifugal Chiller
cos IUP
Chongqing Chongqing KingWorldKingWorldHotel and clubHotel and club
EmparkEmpark International International Shopping MallShopping Mall
Chongqing Empark Grand Hotel Times Shopping Mall
FantawildFantawild HiHi--tech tech Themed ParkThemed Park
High Voltage Centrifugal Chiller——Case Analysis
Building Area: 600,000m2.Introduction to the Project: AC area reaches 436,000m2, 55,000m2 5-star hotel, 313,000 m2 shopping mall, 68,000 m2 entertainment space,Design Difficulties: Composes of several functional areas as thedivided space and different utilizing period, it has different Requirements for AC functions. 。
Chongqing Empark Grand Hotel Times Shopping Mall
High Voltage Centrifugal Chiller——Case Analysis
Chongqing Empark Grand Hotel Times Shopping Mall
Minimum load 1800RT
Hotel
Entertainment
Club
Restaurant
Stores
Time Item and Time load Distribution
High Voltage Centrifugal Chiller——Case Analysis
Host roomHost room
FantawildFantawild HiHi--tech Themed tech Themed ParkPark
EmparkEmpark International International Shopping MallShopping Mall
Eight 2000RT centrifugal machine
Chongqing Empark Grand Hotel Times Shopping Mall
Chongqing KingWorld Hotel and club
High Voltage Centrifugal Chiller——Case Analysis
Chongqing Empark Grand Hotel Times Shopping Mall
10000V ?380V
Will high voltage save Will high voltage save operating costs?operating costs?
Will high voltage drop Will high voltage drop initial investmentinitial investment ?
Is high voltage safe?Is high voltage safe?
Full of worries……
High Voltage Centrifugal Chiller——Case Analysis
Relation of power, current and voltage
5715148301350
87.222691228200072184910141650
Rated current for 10kV motor (A)
Rated current for 380V motor
(A)
Main motor power (KW)
Unit refrigerating
capacity (RT)
Chongqing Empark Grand Hotel Times Shopping Mall
Case Analysis
High Voltage Centrifugal Chiller——Case Analysis
Case Analysis
Eight 2000RT centrifugal chiller systems, power for single motor is 1228kw:◇Apply 380V power supply, start current is 7940A;◇Apply 10kV power supply, start current is only 566.5A,
difference reaches 14 times.◇Apply 380V power supply, full load current is 2269A;◇Apply 10kV power supply, full load current is only 87.2A,
difference reaches 26 times.
Analysis on current
Chongqing Empark Grand Hotel Times Shopping Mall
High Voltage Centrifugal Chiller——Case Analysis
Case Analysis
◇ Transformer, eight, 2000×8×120(average price oftransformer) =1,920,000 yuan
◇ Price different of electricity: 2000×8×100(price difference) =1,600,000 yuan
◇ Low-voltage power distributing cabinet: 400,000 yuan
◇ Star-triangle start cabinet: 400,000 yuan◇ Save 200,000 yuan for cables (1km)◇ Save 1,000,000 yuan installation/civil engineering
fee◇ Area of 2502 equipment room, 4000 yuan/m2, save
1,000,000 yuan
Analysis on initial
investment
Chongqing Empark Grand Hotel Times Shopping Mall
High Voltage Centrifugal Chiller——Case Analysis
Case Analysis
Working Fee
Analysis
Transformer iron loss and copper loss, 8%◇ Working time: 6 months/year, 12hour /day◇ 10kV voltage :6×30×12×1228×8=21,219,840kwh◇ 380V voltage : 21,219,840kwh / 0.92=23,065,043 kwh◇ Difference 1,845,203 kwh◇ Calculate at commercial electricity price 1.00 yuan/kwh◇ Difference reaches 1,845,203 yuan/year
Chongqing Empark Grand Hotel Times Shopping Mall
Climate Solution for Green
EnvironmentHigh Voltage Centrifugal Chiller——Case Analysis
Case Analysis
Chongqing Empark Grand Hotel Times Shopping Mall
-184.50Save Electricity Fee (Annually)
21222306
(RMB0000)Comparison on Working Fee 8
-1,845,2030Difference
21,219,84023,065,043Annual Power Consumption 7
-5730Save Investment
69412671)+2)+3)+4)+5)+6)+7)
0100Increase the Investment on Equipment Host Room 7)
420Cost for Power Wire (1km) 6)
2550Equipment Installation Fee 5)
640800Price Difference of High and Low Voltage Power Supply 4)
080400V Low Voltage Switch Cabinet and Star-Triangle Start Cabinet
3)
01922000KVA Dry Type Transformer 2)
252510KV High Voltage Switch Cabinet 1)
(RMB0000)Comparison of Equipment and Civil Engineering Fee 6
88Quantity 5
87.22269Full Load Current of Compressor Motor 4
10000380Voltage of Compressor Motor 3
1228 1228 Power of Compressor Motor 2
LC600-P LC600-P Model 1
10KV High Voltage Motor Start Project
380V Constant Voltage Motor Start Project Items Cod
e
High Voltage Centrifugal Chiller——Case Analysis
Case Analysis
As a summary, comparison between Empark project centrifugal chiller system 10kV power supply mode and 380V power supply:Save investment by 5,730,000 yuan;Save annual working fee by 1,845,000 yuan, unit life is 20 years, save 36,800,000 yuan.
5,730,000+36,800,000=42,530,000 yuan
Chongqing Empark Grand Hotel Times Shopping Mall
High Voltage Centrifugal Chiller——Case Analysis
Commercial electricity price in Chongqing
Chongqing Empark Grand Hotel Times Shopping Mall
Electricity price / Time table Time
TopPeak
Common
Valley
Price(yuan/Kwh)
High Voltage Centrifugal Chiller——Case Analysis
1、The load differences at day timeand night are serious;
2、The A/C has peakand valley load;
3、Difference for electricity price;4、Require spare refrigerating
source
Cool storage system
Chongqing Empark Grand Hotel Times Shopping MallHotel
Entertainment
Club
Restaurant
Stores
TimeItem and Time load Distribution
PeakComm
onValley
Total load (0000
kilocalorie)
Load rate(%)
High Voltage Centrifugal Chiller——Case Analysis
Cool storage system
Chongqing Empark Grand Hotel Times Shopping Mall
Cooling Tower
Cool Storage Water Tank 10000m3
Cool Storage Water Tank 10000m3
Main Unit
Main Unit
Main Unit
Soft Connector
Thermometer Pressure
Meter Butterfly
Valve Check Valve Filter Electric Valve
Sewage Drainage
Floating Ball Valve
Electric Valve
Operation Instructions: Ⅰ.Work Procedures of Electric
Valve: Control with the cool storage/release automatic control cabinet
1.Cool Storage Work Condition: la˜6a, d, f, g OFF; 1b˜6b, c ON
2.Cool Release Work Condition: la˜6a, d, f, g ON; 1b˜6b, c OFF
3.Direct Cool Work Condition: la˜5a ON; 1b˜6b, c, d, f, g OFF
Ⅱ. Operation Procedures 1.Cool Storage Work Condition:
First, turn the selector switch of the cool storage/release automatic control cabinet to cool storage position, press the Start button, indicator lights on, start the cooling water pump, cooling tower fan, cool pump, vertical pressure pump (cool storage water pump) and refrigerator of the same group.
2. Cool Release Work Condition: First, turn the selector switch of the cool storage/release automatic control cabinet to cool release position, press the Start button, indicator lights on, start the cool release water pump. (When working at cool release state: water temperature is high, cool storage main unit can work simultaneously, start the cooling water pump, cooling tower fan, cool pump, and refrigerating main unit of the same group.)
3. Direct Cool Work Condition: First, turn the selector switch of the cool storage/release automatic control cabinet to direct cool position, indicator lights on, start the cooling water pump, cooling tower fan, cool pump, and refrigerating main unit of the same group.
High Voltage Centrifugal Chiller——Case Analysis
• LCS-600P10×7• 20000m3 cool storage water tank can
store cool air during valley period at night
• 20000m3 cool storage water tank can store 232,000,000 kilocalorie cool when calculating at 11. 6℃temperature difference (16.6-5℃).
Actual Equipments Model Selection
Chongqing Empark Grand Hotel Times Shopping Mall
High Voltage Centrifugal Chiller——Case Analysis
• Actual initial investment increases by 13,000,000 yuan.
• Two refrigeration seasons, work at cool storage mode, electricity fee is 5,400,000 yuan, average price for electricity is 0.42yuan
• For non cool storage mode, the average price for electricity is about 0.9 yuan, system can save working fee by about 6,200,000 yuan.
Working Effect
Chongqing Empark Grand Hotel Times Shopping Mall
Climate Solution for Green
EnvironmentHigh Voltage Centrifugal Chiller——Case Analysis
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