国产精品久久久久久久久,四季AV一区二区夜夜嗨,日韩精品无码中文字幕电影,www.五月婷婷.com

6FX1190-1AF00現(xiàn)貨 in stock! 歡迎來電咨詢~?。?

　廣州地鐵三號線集中冷站系統(tǒng)構(gòu)成及特點
　　廣州地鐵三號線集中冷站采用了施耐德高端PL C QUANTUM 控制器系列，對集中冷站和車站進行控制，各車站與集中冷站之間采用多模光纖以太網(wǎng)通訊方式，通訊協(xié)議為MODBUS TCP .大大保證了通訊速率和通訊信息量的要求，同時也保證了通訊距離和系統(tǒng)的安全可靠性。送排風及空調(diào)系統(tǒng)采用變頻器調(diào)節(jié)風量，水系統(tǒng)二次泵也均采用變頻器調(diào)節(jié)。變頻器與通過Modbus通訊接口接入就地遠程I/O箱的遠程通訊模塊上，大大減少了通訊線的距離，避免了干擾。
　　● 集中冷站系統(tǒng)構(gòu)成
　　○ 集中冷站供冷系統(tǒng)由集中冷站，傳輸管道和末端設(shè)備構(gòu)成
　　○ 其中供冷系統(tǒng)圖如圖1-1，冷站系統(tǒng)圖如圖1-2
集中冷站系統(tǒng)特點
　　與分站供冷方式相比，集中冷站供冷系統(tǒng)需要為多個車站供冷，在供冷范圍和數(shù)量上都要大得多，有以下幾個主要特點：
　　● 冷凍水傳輸距離長。一般地鐵站距在1000米左右，本系統(tǒng)為6個車站供冷，冷凍水傳輸距離將達 2000～3000米。長距離傳輸，管路的阻力大為增加，并且系統(tǒng)的熱惰性加大，增大了系統(tǒng)的調(diào)節(jié)難度
　　● 末端設(shè)備數(shù)量多，供冷管路形成網(wǎng)絡(luò)。由于各站的負荷情況不同，系統(tǒng)調(diào)節(jié)時易導致出現(xiàn)相互影響，需考慮整個網(wǎng)絡(luò)的整體水力平衡
　　● 集中冷站供冷系統(tǒng)的制冷部分，通常采用多機組，二級泵的形式。這種形式適應了長距離管路輸送阻力較大的情況，能夠減小末端系統(tǒng)對冷機的影響。但是增加了泵的數(shù)量和管路復雜性，使調(diào)節(jié)控制的難度加大
　　調(diào)節(jié)控制方法與策略
　　調(diào)節(jié)控制手段
　　● 廣州地鐵三號線集中供冷系統(tǒng)中，PLC采用的調(diào)節(jié)控制手段有：
　　○ 風機變頻變風量(末端設(shè)備)
　　○ 水泵變頻變水量
　○ 水閥調(diào)水量
　　○ 質(zhì)調(diào)節(jié)
　　調(diào)控手段的選擇
　　由于管路很長，冷凍水從集中冷站到末端設(shè)備需要運行數(shù)十分鐘，如果采用質(zhì)調(diào)節(jié)，則調(diào)節(jié)時滯太大。因此在實時控制中，主要采用量調(diào)節(jié)的方式(包括風量調(diào)節(jié)和水量調(diào)節(jié))。質(zhì)調(diào)節(jié)則采用開環(huán)方式，根據(jù)外溫或季節(jié)確定冷凍水溫，并在一定時間內(nèi)(比如1天內(nèi))保持相對穩(wěn)定。
　　二級泵管路長，阻力大，且流量直接受末端負荷的影響，因此二級泵采用變頻調(diào)節(jié)，可以達到較好的節(jié)能效果。同時為了保證通過冷水機組的水量，一級泵采用定速泵，并與冷機對應運行，不進行變頻調(diào)節(jié)。
　　從節(jié)能的角度考慮，優(yōu)先考慮節(jié)能效果較好的風機變頻和水泵變頻調(diào)節(jié)，盡量少使用水閥調(diào)水量的方法。
　　控制調(diào)節(jié)的策略
　　初調(diào)節(jié)
　　集中冷站供冷的管路復雜，不同支路之間的阻力差距大，因此需要進行認真的系統(tǒng)初調(diào)節(jié)，以免系統(tǒng)水力失調(diào)，導致運行調(diào)節(jié)無法正常進行。
　　● 初調(diào)節(jié)目標：
　　○ 驗證系統(tǒng)可以達到設(shè)計工況
　　○ 實現(xiàn)系統(tǒng)的水力平衡，為運行調(diào)節(jié)準備條件。
　　● 調(diào)節(jié)步驟
　　經(jīng)多次調(diào)整，使系統(tǒng)內(nèi)各機組的流量基本相同(如機組型號不同，則各機組的流量比值應基本相同。流量比值=實際流量/設(shè)計流量)。且至少1個機組的閥門為全開狀態(tài)。
　　1、調(diào)整一級泵系統(tǒng)水力平衡
　　2、設(shè)計頻率整定

SIEMENS 6DD1610-0AG0 SIMADYN D MEMORY MODULE

SIEMENS Sinumerik 6FX1126-8BA00 Control Card Interface

PLC Automation Direct KOYO D4-DCM Data Communication Module D4DCM See Picture's

SIEMENS SIMODRIVE 6SN1145-1BA02-0CA1SINUMETIK 840D NCU-BOX 6FC52476FC53576SN

SIEMENS Simodrive 6 RA 2732-6DV57-0 130Amp/380VDC Drive Plus Cards

SIEMENS 6FC9344-5PA NSFP 6FC93445PA

Advantech PCM-3530 A1

Allen-Bradley PanelView 1200 Operator Interface 2711E-T12C6

ALLEN-BRADLEY 1400E 2711E-K14C6 SER A REV B PANELVIEW TERMINAL

ABB BI Vector 500 Drive

ADEPT TECH 30330-12000 USPP 3033012000

(3)GOULD BREAKER TYPE K-1600S / FRAME SIZE 1600A /SOLID STATE TRIP ITE TYPE SS

INDRAMAT KDS-1.1-100-300-W1-220 USPP KDS11100300W1220

TEXAS INSTRUMENTS PLC 565-2820 NSFP 5652820

FANUC A06B-0356-B755 NSFP A06B0356B755

CUTLER HAMMER JDC3250VWH09 USPP JDC3250VWH09

RELIANCE ELECTRIC 11C83K NSFP 11C83K

MOORE PRODUCTS 16114-171/04 USPP 1611417104

KAWASAKI TRC-5052 USPP TRC5052

Siemens 6ES5 374-2FJ21 6ES5374-2FJ21 XLT

Siemens 6ES5-696-3AA21 NSFP 6ES56963AA21

SIEMENS 6ES5-375-0LC41 USPP 6ES53750LC41

Siemens 6ES5 375-1LA21 Memory Sub Module 17030

Siemens CPU 948- 6ES5 948-UA22 very rare

Siemens 6SE6420-2UC11-2AA1 6SE6 420-2UC11-2AA1 NIB FS

Siemens TP27-6 6AV3627-1NK00-2AX0 Touchscreen Glass

Siemens 6FM1470-7AA25

Measurement Technology LTD MTL 8512-IF-HA HART Interface Module

XYCOM 70240-001 REV 1.1 I/O MODULE VME BOARD

Siemens 6ES7 291-8GF23-0XA0 64K Memory Card NIB

Siemens PC/MPI+ PC MPI+ PLC Programming Serial Cable

Reliance 0-51847-2

Schneider Modicon AS-B351-001 ASB35101 AC Input NIB FS

Schneider Modicon AS-9900-040 USPP AS9900040

Schneider Modicon AS-P453-632 USPP ASP453632

Schneider Modicon AS-B804 -116 NICE

Schneider Modicon AS-B231-501

Modicon PanelMate Plus PM Plus 1000 MM-PM10300C 24VDC

SIEMENS SIMATIC S5 6ES5 6ES5436-4UA12 VPE5 PLC DIGITAL INPUT MODULE 51922

Siemens 6ES7 331-1KF01-0AB0 6ES7331-1KF01-0AB0 SM331 Analog Input

Siemens Simatic Digital Output Module S5 6ES5 440-8MA21

SIEMENS 6DD1607-0CA1 6DD1 607-0CA1 in Box Free Ship

SIEMENS Sinumerik Power Supply 6EW 1861-3AB E Stand G

SIEMENS MINT 6SN1123-1AA00-0CA1 6SN11231AA000CA1 Servo

SIEMENS Simodrive 6SN1118-0DG13-0AA0 6SN11180DG130AA0

SIEMENS Control Rack 6FC3761-1FB Z_ Genumerik 3G Unit Sinumerik

Able Reducer VRKF-15C-200 Gear Ratio 1:15

ALLEN-BRADLEY 2706-D21J2 OPERATOR INTERFACE DATALINER

ABB ACH550-UH-059A-4 ADJUSTABLE FREQUENCY AC 40HP 480V-AC MOTOR DRIVE B227968

ACTERNA TTC T-BERD 2209 HANDHELD T1 DS3 TEST SET A+++

6ES7314-6CF02-0AB0 6ES7314-6CG03-0AB0 Brand , Factory Sealed,

882I60930 Marposs GUAGE T5

SIEMENS 6SE9-531-4DK40 NSFP 6SE95314DK40

BARDAC PLX145/330 USPP PLX145330

AVG UTICOR 100G-UT15T3R1 USPP 100GUT15T3R1

MODICON AS-C184-004 USPP ASC184004

IRCON 622F15011220000 USPP 622F15011220000

BROWNING 18HSB1-LR10 USPP 18HSB1LR10

Siemens 6ES5922-3UA11 6ES5 922-3UA11 6ES5922 3UA11 brand top!

Siemens 6ES5-456-4UA12 USPP 6ES54564UA12

SIEMENS 6ES5 752-0AA43 6ES57520AA43

SIEMENS S5 6ES5 464-8MA11 6ES54648MA11 Input

Siemens S5-100U6ES5 100-8MA02 CPU 100

Siemens 6ES7214-2AD23-0XB0

Siemens Simatic 6ES5 095-8MB01 6ES5095-8MB01

Siemens 505-6208A

Hp 81531A Optical head interface module

Wieland Bamberg WEB-1001 EGM Encoder Interface Module

SIEMENS 6ES5 375-0LC21 6ES53750LC21

Siemens LOGO! PC CABLE 6ED1 057-1AA00-0BA0 PC-LOGO

Omron C200H-ID212

Schneider Modicon AS-H827-103 Gould 11 Slot 800 Series Rack

Schneider Modicon Analog Output Module AS-BDAU-202

Schneider Modicon AS-J200-001 USPP ASJ200001

Schneider Modicon MODICON/ AS-W808-002 CABLE ASSEMBLY REMOTE I/O SIG XLNT

Schneider Modicon AS-M480-004

Schneider Modicon TSX Compact M AS-BDAP-218 ~ SURPLUS~

SMCSI EX250-IE3 DEVICENET INPUT MODULE

Schneider Telemecanique XB4-BL42 Push Button Switch

SIEMENS TI 505-4908 RELAY OUTPUT MODULE

Siemens 6AV3 545-0CC10-0AX0 6AV3 5450CC100AX0 Panel

SIEMENS SINUMERIK 6FX1122-1AA01 COUPLING MODULE

ESI LASER TIMING/COMMUNICATION MODULE BOARD CKA 63116

SIEMENS SIMODRIVE PERM.MAGNET MOTOR 1 FT5036-0AH01-9-Z

SIEMENS SIMODRIVE 6SN1145-1BA02-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC53562ZM

Allen-Bradley 800T-B6 30.5mm Type 4/13 Push Button Red

ABB 15 KV Advac Panel Vacuum Circuit Breaker Cell Medium Voltage DPU PT complete

ACC, DIFFERENTIAL MULTIPLEXER, 40 CH, 7702 2074767

A06B-6058-H322 FANUC SERVO AMPLIFIER REMANUFACTURED

8" LCD 800x600 Video Zoom Microscope 3.3x-147x Without Stand

SEW EURODRIVE MDX60A0220-503-4-00 USPP MDX60A0220503400

ALLEN BRADLEY 803-A12 NSFP 803A12

ALLEN BRADLEY 3500-P10 USPP 3500P10

INTERMEC J2050-A-07102 USPP J2050A07102

GENERAL ELECTRIC DS3800HPMA1E1D USPP DS3800HPMA1E1D

YAMATAKE 82408470-001 USPP 82408470001

MERLIN GERIN NFNF-36225-AAHJ00 NSFP NFNF36225AAHJ00

Siemens 6ES5-305-7LB11 MODULE 6ES53057LB11

SIEMENS 6ES5 430-4UA12 6ES54304UA12

SIEMENS S5 6ES5 420-4UA14 6ES54204UA14 Input Module

Siemens Digital Input 8 x 24VDC 6ES5 431-8MA11

Siemens 6ES7 216-2AD22-0XB0 6ES7216-2AD22-0XB0 FreeShip

Siemens OP27 6AV3627-1LK00-1AX0 Membrane Keypad

RELEASE SuperMicro X9DBU-IF MB ※Check W/ Us for Availability FIRST※

Texas Instruments 5TI-2459514

Telenex PL-951-158-2 T1 Dual Port Interface Module

TSXETY5102 Modicon Premium TSX57 10/100 FCAST MOD TSX-ETY-5102

Siemens DCS Module 6DS1844-8FA in box, Seal opened,

Modicon MM-PMA2-300

Schneider Modicon Gould AS-B875-111 ASB875111 I/O Analog Input PLC Module

Schneider Modicon ASBADU206 TESTED and GUARANTEED Compact Analog Input AS-BADU-206

Schneider Modicon AS-BSEA-020 USPP ASBSEA020

Schneider Modicon AS-C484-600

Schneider Modicon AS-BDAP-210 TSX OUTPUT MODULE NIB

Schneider Modicon I/O HOUSING AS-H8190199 ~ NS

SCHNEIDER Telemecanique Switch XB4 BVB1

Schneider Automation Inc 140 DDI 841 00 140DDI84100 Input Module Sealed

PWR-4000-DC 4000W DC POWER SUPPLY FOR CATALYST 6500/7600 1YR - ASK 4 Q

SIEMENS 6ES5-441-8MA11 PLC OUTPUT MODULE ""

SIEMENS 6DD1641-0AC0 EB11 DIGITAL I/O MODULE IN BOX

Lenze EMF2102IBCV003 Lecom-LI Communication Module EMF2102IBC-V003

SIEMENS Simodrive 6SN1130-1AA11-0BA0

SIEMENS SINUMERIK 840C NC CPU 6FC5110-0BB01-0AA2

SIEMENS Moore XTC Transmitter-Controller 340DBBSAAB NN213

ALLEN-BRADLEY SLC 500 1746-OB8 OUTPUT MODULE QUANTITY

ALLEN BRADLEY RIGHT HAND DOOR HARDWARE KIT 1494V-L3

ABB SACE PR231/P W/ BK15494 P4KLAM04006 OUT OF

A06B-0148-B175#0076 FANUC SERVO MOTORS REMANUFACTURED

7 Digiboard DBI A/N30000354 Full size I/O ISA card

PACIFIC SCIENTIFIC SC755A001-01 USPP SC755A00101

ALLEN BRADLEY 1771-NT1 FNFP 1771NT1

ALLEN BRADLEY 1336S-B010-AN-EN-GM1-L4 USPP 1336SB010ANENGM1

GENERAL ELECTRIC DS215SLCCG2AZZ01B NSPP DS215SLCCG2AZZ0B

TELEMECANIQUE ATV-66D23-N4 USPP ATV66D23N4

SQUARE D LC-26600AC USPP LC26600AC

CUTLER HAMMER AGSCH120N030040 NSFP AGSCH120N030040

Siemens 6ES5 951-7NB21 -- 6ES59517NB21

SIEMENS 6ES5-752-0AA23/6ES5752-0AA23 INTERFACE MODULE NIB

Siemens 6ES5 498-1AA41 USPP 6ES54981AA41

Siemens 6AV6642-0DA01-1AX1 OP177B No Box

Siemens LOGO 6ED1 055-1CB00-0BA0 in sealed box

RPS MKS ASTRON AX7685 GENERATOR

Telemecanique TSX1723428

Siemens Simatic 6ES7 151-1AA05-0AB0 6ES71511AA050AB0 Interface Module

Wago 750-478 2-CHANNEL ANALOG INPUT MODULE

SIEMENS 6SL3211-0KB13-7UA0 0.37KW 220V

Modicon AS-P801-001

Schneider Modicon DTA 200/AS-HDTA-200 DTA200ASHDTA200 Primary Subrack

Schneider Modicon ASB232501 Output Module AS-B232-501

Schneider Modicon AS-B875-011 8CH Analog Module ASB875011

Schneider Modicon AS-W922-015 GENERIC OEM CABLE ASW922015

Schneider Modicon Gould AS-C484-266 484 Controller Programmable

Schneider Modicon AS-J892-001 Communication Module ASCII 984/800 RI/O INTERFACE

SCHNEIDER AUTOMATION PM+ 1000 MODBUS PLUS INTERFACE NNB

SIEMENS 505-4332 MODULE DIGITAL INPUT 505 32IN 14-30VDC 5054332

RELIANCE ELECTRIC I/O PROCESSOR MODULE 45C200A

SIEMENS 7MH71561AA001AA MILLTRONICS SF500 INTERFACE NIB

SIEMENS SINUMERIK OP 032 6FC5203-0AB20-0AA1 NIB

Prosoft MVI56-ADM 'C' Communications Module MVI56DAM

SIEMENS Parameter Circuit Board 6SN1114-0AA01-0AA0

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D 6FC5247-0AA00-0AA26SN1123

SIEMENS 6FC3521-0AC-Z USPP 6FC35210ACZ

ALLENBRADLEY2706E43J128B1OPERATORINTERFACEDATA

Allen Bradley Terminal Board 9101-1779 Amphenol Connector /Sealed

ABB K - Line K-600S 600V 600A LI AIR CIRCUIT BREAKER

Zehnb 850 incircuit Test System Zehnb 810 ICT sold for parts

(SIEMENS) WARM BOOT 3RW4444-6BC44 good in condition for industry use

MITSUBISHI FRSX2-18.5K USPP FRSX2185K

ALLEN BRADLEY 1336VT-B050-EAS-FA2-L1 USPP 1336VTB050EASFA2

GENERAL ELECTRIC 6KDV3400Q2B20 NSFP 6KDV3400Q2B20

FLEXMATE INC 3-USP-G02 USPP 3USPG02

SIEMENS 6ES5-927-3SA12 USPP 6ES59273SA12

REXROTH DM-15K-1101-D USPP DM15K1101D

TOLEDO SCALE 4100PA NSFP 4100PA

Siemens 6ES5 524-3UA13 6ES55243UA13

Siemens 6FM1470-4AA25 6FM14704AA25 S5 w/ 6ES5 373-1AA61

SIEMENS 6ES5-451-8MA11

Siemens 6ES5 373-1AA41/6ES5373-1AA41 MEM SUB MOD XLNT

Siemens S5 Digital Output Pair 6ES5 441-8MA11& 6ES5 441-8MA12 5225

Siemens Cable 6ES7 290-6AA20-0XA0 6ES7290-6AA20-0XA0

Siemens 6ES5 422-8MA11 6ES54228MA11

Square D 8030 DLM-110

Schneider TCCX1730LW Operator Interface Module with Cable

Wireless Eight 8 Channel Relay Module Board Virtual Com Port Controlled

Siemens 6ES7952-1KM00-0AA0 4M Memory Card NoPackage

Siemens Touch Panel TP170A 6AV6545-0BA15-2AX0 ping Worldwide

Shimaden SR2201-21B

Schneider Modicon ASH819100800 Series Rack AS-H819-100

Schneider Modicon AS-B573-005 USPP ASB573005

Schneider Modicon Controller AS-B890-101

Schneider Modicon AS-H827-100 11-Slot PLC I/O Rack

Schneider Modicon AS-B846-001 Analog Mix Voltage In ASB846001

Modicon 19" Operator Interface 557VCM74210 11141

SIEMENS 6ES7421-1BL01-0AA0 SIMATIC S7 DIGITAL INPUT MODULE 62669

Schneider Modicon 140CRA21110 MB Drop AC Module

SIEMENS MC S85 OPERATOR PANEL 853 362 GOOD TAKEOUT

SIEMENS Sinumerik 6FX1118-4AB01. I/O Interface Mod .

Siemens Simatic 6ES5525-3UA11 Communication Module

SIEMENS 6SN1123-1AA00-0HA1 Power Supply Module 8 Amp AS-IS

SIEMENS 6SN1123-1AB00-0AA1 SIMODRIVE LT-MODUL INT. 2X15A WORKING VERY CLEAN

SIEMENS 6FC5-210-0DA20-2AA1 MAIN MEMORY CONTROL UNIT MMC 103. 32MB DRAM

AllenBradleySLC500OutputModule1746-OW16SeriesA

Allen-Bradley 1 Pair AC Output Modules 2755-OA5S

ABB CIRCUIT BREAKER S5H 400 AMP 3P # S5H400EWS4 803NW

ADEPT TECH 90332-48050 NSFP 9033248050

(4459) Allen Bradley Industrial Computer 6181-CIBBBBZZZ (4459)

INDRAMAT MAC112A-0-VD-3-C/130-A-1 USPP MAC112A0VD3C130A

TOSHIBA VT130G2-4400 USPP VT130G24400

FANUC A06B-6044-H008 USPP A06B6044H008

DANFOSS 175L2045 USPP 175L2045

RELIANCE ELECTRIC 419003-R NSPP 419003R

NACHI F2C-T355-ZB25-94 USPP F2CT355ZB2594

MEASUREX 052940-00 USPP 05294000

Siemens 6ES5 377-0BB41 6ES53770BB41

Siemens 6ES5-752-0LA22 NSPP 6ES57520LA22

SIEMENS 6ES5-376-0AA31 USPP 6ES53760AA31

Siemens 6ES5 385-8MB11 6ES53858MB11 High Speed Counter

Siemens PG 615 Programmer 6ES5 615-0UA11 WOW

Siemens 6SE7014-0TP50-Z NIB

Siemens TP7 6AV3607-1NH00-0AX0 Touch Panel

Siemens 6SA8110-2BC00

METTLER TOLEDO B90074000A SERIAL INTERFACE MODULE NNB