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.


“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!


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 !


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


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


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. 。




Minimum load 1800RT

Hotel

Entertainment

Club

Restaurant

Stores

Time Item and Time load Distribution


Host roomHost room

FantawildFantawild HiHi--tech Themed tech Themed ParkPark

EmparkEmpark International International Shopping MallShopping Mall

Eight 2000RT centrifugal machine


Chongqing KingWorld Hotel and club



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……


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)


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



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



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


Climate Solution for Green

EnvironmentHigh Voltage Centrifugal Chiller——Case Analysis

Case Analysis


-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


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



Commercial electricity price in Chongqing


Electricity price / Time table Time

TopPeak

Common

Valley

Price(yuan/Kwh)


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(%)


Cool storage system


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.


• 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



• 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


Climate Solution for Green

EnvironmentHigh Voltage Centrifugal Chiller——Case Analysis

BEIJING CAPITAL AIRPORT TERMINAL 3

Reference Project

• Total application area：370,000m2

Centrifugal water chiller

Screw water chiller

• 4 units 1000RT Centrifugal Chiller• 6 units 700RT Centrifugal Chiller• 2 units 500RT Centrifugal Chiller• 1 units 350RT Screw Chiller

BEIJING CAPITAL AIRPORT TERMINAL 3

Reference Project

Hall A09 and A105 units of 550RT 10KV High voltagecentrifual chiler

Shanghai Expo Exhibition Hall

Reference Project

Chongqing Kingworld Times Plaza

Reference Project

Exclusive choice of China’s key industries

Petrochemical industry

Nuclear power industry

Aerospace industry

National defense

Reference Project

Oil Refining Plant

DaQing Oil Field

ShangHai BaoShanIron & Steel

Reference Project

QinShan nuclear power plant

Reference Project

Mall

Guangzhou world trade center

Bank

Reference Project

Chongqing Huayu Plaza

Xiamen Everbright

Bank Chongqing Water Resources Bureau

Other Commercial ProjectsOther Commercial Projects

Guangdong Province People’s

ProcuratorateCommand Center

Huxian County Fortune Center

Chongqing Kingworldtimes plaza ……

Reference Project

Project : Treasure island, IndiaCooling capacity: 4176 TRChiller : Centrifugal chiller plus screw chiller

Reference Project

Project : Zimnicea Glycol factory, Bucharest, Romania;Cooling capacity: 1060 TRChiller : Centrifugal chiller

Reference Project

New centrifugal chiller - Prieto Nouel · 2017. 7. 26. · Big capacity...

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Transcript of New centrifugal chiller - Prieto Nouel · 2017. 7. 26. · Big capacity...