1771-DRS现货 in stock! 欢迎来电咨询~！！

　广州地铁三号线集中冷站系统构成及特点
　　广州地铁三号线集中冷站采用了施耐德高端PL C QUANTUM 控制器系列，对集中冷站和车站进行控制，各车站与集中冷站之间采用多模光纤以太网通讯方式，通讯协议为MODBUS TCP .大大保证了通讯速率和通讯信息量的要求，同时也保证了通讯距离和系统的安全可靠性。送排风及空调系统采用变频器调节风量，水系统二次泵也均采用变频器调节。变频器与通过Modbus通讯接口接入就地远程I/O箱的远程通讯模块上，大大减少了通讯线的距离，避免了干扰。
　　● 集中冷站系统构成
　　○ 集中冷站供冷系统由集中冷站，传输管道和末端设备构成
　　○ 其中供冷系统图如图1-1，冷站系统图如图1-2
集中冷站系统特点
　　与分站供冷方式相比，集中冷站供冷系统需要为多个车站供冷，在供冷范围和数量上都要大得多，有以下几个主要特点：
　　● 冷冻水传输距离长。一般地铁站距在1000米左右，本系统为6个车站供冷，冷冻水传输距离将达 2000～3000米。长距离传输，管路的阻力大为增加，并且系统的热惰性加大，增大了系统的调节难度
　　● 末端设备数量多，供冷管路形成网络。由于各站的负荷情况不同，系统调节时易导致出现相互影响，需考虑整个网络的整体水力平衡
　　● 集中冷站供冷系统的制冷部分，通常采用多机组，二级泵的形式。这种形式适应了长距离管路输送阻力较大的情况，能够减小末端系统对冷机的影响。但是增加了泵的数量和管路复杂性，使调节控制的难度加大
　　调节控制方法与策略
　　调节控制手段
　　● 广州地铁三号线集中供冷系统中，PLC采用的调节控制手段有：
　　○ 风机变频变风量(末端设备)
　　○ 水泵变频变水量
　○ 水阀调水量
　　○ 质调节
　　调控手段的选择
　　由于管路很长，冷冻水从集中冷站到末端设备需要运行数十分钟，如果采用质调节，则调节时滞太大。因此在实时控制中，主要采用量调节的方式(包括风量调节和水量调节)。质调节则采用开环方式，根据外温或季节确定冷冻水温，并在一定时间内(比如1天内)保持相对稳定。
　　二级泵管路长，阻力大，且流量直接受末端负荷的影响，因此二级泵采用变频调节，可以达到较好的节能效果。同时为了保证通过冷水机组的水量，一级泵采用定速泵，并与冷机对应运行，不进行变频调节。
　　从节能的角度考虑，优先考虑节能效果较好的风机变频和水泵变频调节，尽量少使用水阀调水量的方法。
　　控制调节的策略
　　初调节
　　集中冷站供冷的管路复杂，不同支路之间的阻力差距大，因此需要进行认真的系统初调节，以免系统水力失调，导致运行调节无法正常进行。
　　● 初调节目标：
　　○ 验证系统可以达到设计工况
　　○ 实现系统的水力平衡，为运行调节准备条件。
　　● 调节步骤
　　经多次调整，使系统内各机组的流量基本相同(如机组型号不同，则各机组的流量比值应基本相同。流量比值=实际流量/设计流量)。且至少1个机组的阀门为全开状态。
　　1、调整一级泵系统水力平衡
　　2、设计频率整定

Siemens Inverter 6SE6 420-2UC25-5CA1 in Box

SIEMENS RWD82U Controller

RELIANCE ELECTRIC 45C-201A USPP 45C201A

Spectrum Controls SCC-3

SCHNEIDER TELEMECANIQUE OTB1EODM9LP ETHERNET INTERFACE MODULE FREE SHIP

VWIC2-1MFT-G703 1-Port Multiflex Trunk G.703 E1 Voice/Wan Interface

Siemens 6ES7 223-1HF20-0XA0 6ES7223-1HF20-0XA0 NIB

Siemens OP37 6AV3637-1ML00 Membrane Keypad FS

Reliance 0-49015-a

Schneider Modicon AS-B805-016 115VAC Input Module

Schneider Modicon AS-9000-451 USPP AS9000451

Schneider Modicon AS-P370-000 USPP ASP370000

Schneider Modicon AS-B268

Schneider Modicon AS-8535-000 CONNECTOR

MODICON TELEMECANIQUE MAGELIS OPERATOR INTERFACE TXB TF024510E PARTS/REPAIR

SIEMENS SIMATIC S7 DIGITAL INPUT MODULE 6ES7 321-1BH02-0AA0

Siemens 6ES7 334-0KE00-0AB0 6ES73340KE000AB0

Siemens Simatic Panel PC IL70 Touch Panel PC 6AG7011-1BA00-0AD0

Siemens 9350 9350DC-100-0NZZZA NIB Power Meter Display ION Profibus Access

SIEMENS SINUMERIK MACHICONTROL PANEL MCP 416C-TKEY MPI 6FC5203-0AF50-4AA1

SIEMENS 6SN118-0AA11-0AA1 6SN11180AA110AA1 Simodrive

SIEMENS SIMODRIVE 6SN1123-1AA00-0HA0 with 6SN1118-0AD11-0AA0

SIEMENS Encoder 6FC9320-3DC F54621B00

Advantech PCM-9381

ALLEN-BRADLEY 2711E-K10C6 PANELVIEW 1000E OPERATOR INTERFACE

ABB 6228BZ10000D MULTIBUS SC D/F

Acterna FST-2310

6AV6112-1AB20-0DB0 COROS VP-B20

8520-MOP7 ALLEN BRADLEY MONITORS CRT REMANUFACTURED

SIEMENS 6SE3-228-4DK40 USPP 6SE32284DK40

BAILEY CONTROLS IMCOM-03 NSFP IMCOM03

ASEA BROWN BOVERI YB560103-CD/24 USPP YB560103CD24

MODICON 557VIC10400 USPP 557VIC10400

INDRAMAT MDD093A-N-030-N2L-110PB0 USPP MDD093AN030N2L1A

ASEA BROWN BOVERI GNT0137211P5 USPP GNT0137211P5

TYLAN GENERAL FC-3926V NSFP FC3926V

Siemens 6ES5-450-3AA11 USPP 6ES54503AA11

SIEMENS 6ES5 700-0LA12 6ES57000LA12

SIEMENS S5 6ES5 374-2KH215V Flash 256 kByte Memory 16Bit

Siemens S5 6ES5 955-3LF44 6ES5955-3LF44 6ES59553LF44

Siemens 6ES7 972-0BA51-0XA0 6ES79720BA510XA0 NIB

Siemens S7 CP443-5 Simatic 6GK7 443-5DX04-0XE0 FreeShip

Siemens 3LC5 277-1TB

Honeywell Intrusion 4100SM Serial Interface Module

WATERS HPLC SYSTEM INTERFACE MODULE

Siemens 6DS1731-8EA 6DS17318EA in Box, Seal opened,

Siemens LOGO! 24RCL PLC 6ED1053-1HB00-0BA2

Omron 3G2A5-RT002-E

Schneider Modicon AS-M480-004 ASM480004 4K Memory Carteidge

Schneider Modicon PCB Processor AS-500P-000 Rev B16 _ Assy S500 Rev B Circuit Board

Schneider Modicon AS-H827-003 USPP ASH827003

Schneider Modicon Groupe/Schneider/ AS-B804-016 unsed warranty

Schneider Modicon AS-BDEP-218

Schneider Modicon SA-B575-202 Stepper Motor Control AS-IS

Telemecanique Megelis HMI XBTG2220 Operator Interface

SCHNEIDER Telemecanique Switch XB4 BVB3

SIEMENS XBTGT1105 3.8" Touch Panel XLNT

Siemens 6AV6 542-0AD15-2AX0 MP270 Simatic Multi Panel

SIEMENS SINUMERIK 6FC5203-0AF02-0AA1 MembraKeypad

GE Fanuc A16B-3200-0331 Ethernet Communications Module Card

SIEMENS Sinamics Power Module 340 6SL3210-1SE11-3UA0 Simodrive Simatic

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA2SINUMETIK 840D NCU-BOX 6FC52476FC5356 2KH

SIEMENS 1 UNCUT KEY WITH KEYLESS REMOTE 08 09 10 HONDA ACCORD KR55WK49308

Allen-Bradley Analog Output Module 1778-OFC

AB,ALLEN-BRADLEY BULLETIN 1394 DIGITAL SERVO CONTROLLER 1394C-SJT05-D

AC Motor Speed Control VFD - 60 HP - 600 Volt - Three Phase Input

A06B-0757-B200#3100 FANUC AC SERVO SPINDLE REMANUFACTURED

75HP 3PH 230V VFD TECO WESTINGHOUSE VARIABLE FREQUENCY DRIVE EQ7-2100-C

RELIANCE ELECTRIC VZ3000-RIPS-2 USPP VZ3000RIPS2

ALLEN BRADLEY 6152-BHTZDEACAAZ USPP 6152BHTZDEACAAZ

ALLEN BRADLEY 2706-A41J NSFP 2706A41J

INDRAMAT MDD090C-N-030-N2L-A110GBO USPP MDD090CN030N2La1

YASKAWA ELECTRIC JANCD-SV02B USPP JANCDSV02B

WESTINGHOUSE NCMZ-799 USPP NCMZ799

ITE SIEMENS LCP5004S120 NSFP LCP5004S120

Siemens 6ES5-247-4UA31/6ES5247-4UA31 POSITIONING MODULE NIB-FS

SIEMENS 6ES5 377-0BA31 6ES53770BA31

SIEMENS OUTPUT MODULE 6ES5 451-7LA11

Siemens BOARD 6ES5-410-0AA12 6ES5 410 0AA12 6ES54100AA12 SPCB470

Siemens 6ES7 151-7AA20-0AB0 6ES71517AA200AB0

Siemens OP17 6AV3 617-1JC20-0AX1 Membrane Keypad ping worldwide

RELEASE SuperMicro X9SRI-3F Motherboard ※FULL MFR ※

Texas Instruments 505-6516

SUNPAK INTERFACE MODULE PT-1D FOR PENTAX LX ME-F ME SUPER MG MV MV1 CAMERAS

TYAN THUNDER N6550EX S4989 S4989-LE AMD QUAD 1207 SERVER BOARD S4989WG2NR-LE

Siemens CPU 222 6ES7 212-1BB22-0XB0 6ES7212-1BB22-0XB0

Modicon DR-1060-105

Schneider Modicon /Schneider AS-B873-011/AB873011 NICE

Schneider Modicon ASB825016 24VDC 16point Input Module AS-B827-016

Schneider Modicon AS-BDEP-216 NSPP ASBDEP216

Schneider Modicon AS-BDEP-209 Compact AC IN Module ASBDEP209

Schneider Modicon -AS-521P-007

Schneider Modicon DEP 218/AS-BDEP-218 Automation PLC Discrete Input card SEALED

Schneider Telemecanique ATV31 CPU Board

Schneider MODICON 984 series of Switch input modules AS-B809-016 WARRANTY

QLogic SANBox 5600 FC 8-Ports Switch SB5600Q-08A 4GB Fabric Switch

Siemens 6ES54537LA11 6ES5-453-7LA11 Output Module 24/60VDC 0.5A Sealed Box

SIEMENS 6DD1600-0AF0 Simadyn D CPU Controller /BOX

MERCEDES W220 S500 R230 Sl55 S55 COMMUNICATION motorola telephone module

SIEMENS Simodrive 6SN1123-1AA00-0CA1 6SN11231AA000CA1

SIEMENS SINUMERIK 840D/DE STRATA-CARD 8MB LEER 6FC5247-0AA11-0AA3

SIEMENS /MOORE 39MBXNAN APACS MODULBUS EXPANDER 16180-1/15

Allen-Bradley TTL Output Module 1771-OGC +5V

Allen Bradley SLC 500 1746-I012 input/output module

ABB ROBOTICS S4 3HAB 5386-1/8 TEACH PENDANT GREAT CONDITION

A06B-0147-B084 FANUC SERVO MOTORS REMANUFACTURED

0-49015-A

NEC C-526 USPP C526

ALLEN BRADLEY 1756-L61 NSFP 1756L61

ALLEN BRADLEY 1336E-A010-AA-EN NSFP 1336EA010AAEN

GENERAL ELECTRIC 7VXAS057CD09 USPP 7VXAS057CD09

STRUTHERS DUNN DIRECTOR 4000 75T77 USPP 75T77

SIEMENS A1-106-100-822 NSFP A1106100822

BARBER COLMAN MP-481-131-0-2 USPP MP48113102

Siemens 6ES5 945-7UA23 6ES59457UA23

Siemens Simatic S5 6ES5460-4UA13 6ES54604UA13 FS

SIEMENS 6ES5-717-1AA100AA NSFP 6ES57171AA100AA

Siemens 6ES5 490-8MB11 USPP 6ES54908MB11

Siemens 6AV6 545-0BB15-2AX0 TP170B LCD Display

Siemens Landis & Staefa RWD68

S3420GP Server Board

Telemecanique ATV66U41N4

SIEMENS ROLM DCE V.35 INTERFACE MODULE 42230 IN BOX

Wago 758-876/000-111 WAGO-I/O-IPC-P14 Linux 2.6 PROFIBUS dp master

Siemens 6SE7038-6GL84-1JB0 6SE7 038-6GL84-1JB0 FreeShip

Modicon AS-M507-008

Schneider Modicon AS-B883-200 ASB883200 Thermocouple Input

Schneider Modicon AS-B864-001 ASB864001 Register Output H206

Schneider Modicon AS-B865-001 USPP ASB865001

Schneider Modicon DEP210/AS-BDEP-210 INPUT MODULE

Schneider Modicon Controller AS-B804-116

Schneider Modicon AS-HDTA-201 SECONDARY SUBRACK 5 SLOTS COVER

SCHNEIDER MODICON AS-BDAP-210 OUTPUT MODULE NNB

Siemens 6ES5 432-4UA12 Digital Input Module NIB Compare 788.00+

Rigol Function/Arbitrary Waveform Generators DG3061A

SIEMENS A5E00159514 PANEL TOUCH SCREEN

SIEMENS Sinumerik FM-NC/840D Hand-Held Control Unit

Reliance Automax Network Communication Module 57C404B -

SIEMENS Drive 6SN1123-1AA00-0HA0 6SN11231AA000HA0

SIEMENS SINUMERIK 840D/DE NCU 573.4 6FC5357-0BB34-0AE0 NIB

SIEMENS 6FC4600-1AS01 _ I/O Module _ 6FC46001AS01

AllenBradley2711-K10G16/C2711K10G16Panelview

ALLEN BRADLEY VDC OUTPUT MODULE 1771-0BD

ABB IRB 1400 SER 14-20064 ROBOT S4C PLUS CNTRLR TEACH PENDANT W/ MATCHED SET

ADVANCED FASTENING FWA10486 SPINDLE PROCESSOR CSS 91 183 SIEB & MEYER 43.11.03

(O4-3) 2 ALLEN BRADLEY 505EODA2L STARTERS O4-3

MEASUREX 09806701 USPP 09806701

ALLEN BRADLEY 1336F-B050-AE-EN USPP 1336FB050AEEN

GE FANUC IC800SSI228D2 USPP IC800SSI228D2

FANUC A16B-2200-0200 USPP A16B22000200

SIEMENS 6DS1308-8AA USPP 6DS13088AA

RELIANCE ELECTRIC 57C-404 NSFP 57C404

SIEMENS 6SE2122-3AA21 USPP 6SE21223AA21

Siemens 6ES5 470-7LB13 6ES54707LB13

Siemens 6ES5-951-7LB21 USPP 6ES59517LB21

SIEMENS 6ES5-441-7LA11 USPP 6ES54417LA11

Siemens 6ES5 955-3LC41 Power Supplywith Warranty 6ES59553LC41

Siemens S5 6ES5-464-8ME11

SIEMENS c98043-a1602-L1

Siemens 6ES5 464-8ME11 -FS- 6ES54648ME11

Square D 8030 CIM-151

ON Q Home 8 Port Network Interface Module 363486-01

WS-C2960-24TC-S CISCO 2960-24TC SWITCH- W/1YR - WSC296024TCS Fast

Siemens 6ES7331-7KB02-0AB0 6ES7 331-7KB02-0AB0

SIEMENS SINUMERIK 6FC5203-0AF02-0AA1 Membrane Keypad

Samsung LT133X2-154

Schneider Modicon AS-MEEP-000 MEMORY MODULE ASMEEP000

Schneider Modicon AS-B553-000 USPP ASB553000

Schneider Modicon AS-W801-012 NSFP ASW801012

Schneider Modicon AS-BDEP-220 ASBDEP220 Input Module

Schneider Modicon AS-B827-032 INPUT MODULE 32 POINT 24VDC 5201

MODICON AEG PANELMATE PLUS OPERATOR INTERFACE MM-PM22-200 PARTS OR REPAIR

Siemens Digital Input Module 6ES5431-7LA11

SFP-GE-L GENUINE CISCO 1000BASE-LX/LH SFP DOM

Siemens OP27 6AV3627-1JK00-0AX0

SIEMENS Sinumerik 6FC5111-0CA70-0AA0 End Terminator

STANDARD COMMUNICATIONS CELLULAR MODULE CMM8600-997

SIEMENS 6SN1123-1AA00-0AA0 Simodrive LT-Module INT.15A SLA

SIEMENS C98043-A1304-L 22-06 Simodrive Drive

SIEMENS 6FC5247-0AA21-0AA0 Rotary Switch - 810D/840

Advantech TPC-1260TE

ALLEN-BRADLEY 160-P1 PROGRAMMING TERMINAL KEYPAD ""

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88249

ADEPT TECH 10332-22000 USPP 1033222000

(13) SPIRENT ADTECH AX/4000 WITH (132) MODULES

INDRAMAT DDS2.1-W/050-D USPP DDS21W050D

TELEMECANIQUE TSX-P87410 USPP TSXP87410

ESC S-112-0000 USPP S1120000

CUTLER HAMMER D7DBA15STA1XXX USPP D7DBA15STA1XXX

RELIANCE ELECTRIC 0-52002-1 NSFP 0520021

MODICON AS-P933-007 NSPP ASP933007

INGERSOLL RAND 2133A99G02 USPP 2133A99G02

Siemens 6ES5 318-8MB13 6ES53188MB13

Siemens 6ES5-544-3UA06 USPP 6ES55443UA06

SIEMENS 6ES5-374-2KH21 USPP 6ES53742KH21

Siemens 6ES5 373-0AA41 -- 6ES53730AA41

Siemens 8pc Jumper Bar 6ES5-763-7LA11 6ES57637LA11

Siemens 6RA70 C98043-A1601-L4-16

SIEMENS TP270-10 6AV6545-0CC10-0AX0 Touch Glass

Siemens 6ES5951-7LD12

LOT 8__Belkin OmniView Quad-Bus Server Interface Module PS/2 F1DE101A-AP

Yamaha Motif XF8 Synthesizer

Siemens 6ES7 223-1PL22-0XA0 6ES7223-1PL22-0XA0 FreeShip

SIEMENS OP7 6AV3 607-1JC30-0AX1 Membrane Keypad ping Worldwide

Reliance 0-51816-1

Schneider Modicon AS-B801-000 Slot Filler Plate

Schneider Modicon AS-9487-004 USPP AS9487004

Schneider Modicon AS-P421-010 USPP ASP421010

Schneider Modicon AS-B550-001 B550001 ASB550001 B550-001

Schneider Modicon AS-884A-301 Processor Module AS884A301 UVG

Modicon Square D XBT-F024110 XBTF024110 Operator Interface

SIEMENS SIMATIC S5 INPUT MODULE 6ES5-420-7LA11 6ES5420

Siemens 6ES7 331-7TF01-0AB0 -FS- 6ES73317TF010AB0

Siemens Simatic Output Module 505-4508 8 pts in box

SIEMENS Sinumerik 802S 802C 802 5.7 LCD screen display panel

SIEMENS SINUMERIK MPI INTERFACE 6FC5203-0AE00-0AA0

SIEMENS 6SN1118-0NH01-0AA1

SIEMENS Simodrive 6SN1123-1AA00-0AA0

SIEMENS CONTROLLER CARD 6FC5357-0BB11-0AE1

Advantech SOM-2353 SOM-2353F

Allen-Bradley 2711-B5A5 Series H Panelview 550 Touchscreen FRN 4.46

ABB AC Drive ACS601-0011-4-000B1200801 3PH 380-500 VAC - Extrusion Spare Parts

Acterna JDSU T-Berd FST2000 TestPad - FST-2310 OC3/12/48 90

6ES7147-1AA01-0XB0 Brand , Factory Sealed,