欧美a级黄片,中文字幕精品久久久久人妻红杏1,福利久久,亚洲AV无码片一区二区三区_

1787-PLUG10R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(fēng)及空調(diào)系統(tǒng)采用變頻器調(diào)節(jié)風(fēng)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(dǎo)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(yīng)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(fù)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(fēng)機變頻變風(fēng)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(fēng)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(yīng)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(fēng)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(fù)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(dǎo)致運行調(diào)節(jié)無法正常進行。
　　● 初調(diào)節(jié)目標(biāo)：
　　○ 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(zhǔn)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(yīng)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

Schneider Modicon DISCRETE OUTPUT 8 PT MODULE DAP 210 AS-BDAP-210 2

Schneider Modicon AS-B239-001 ASB239001 High Speed Counter NIB

Schneider Modicon AS-B837-016 USPP ASB837016

Schneider Modicon AS-P800-003 NICE

Schneider Modicon Battery CELL MA-0147-002 FOR AS-5378-002 PACK

Schneider Modicon AS-B553 INPUT MODULE

Schneider Automation Inc AS-BDAP-216N ASBDAP216N Output Module

SIEMENS Digital Input Module 6ES5436-4UA12 NIB Box Opened to Meke Pictures

Schneider Modicon 467NHP811DP 467-NHP-811-DP Profibus-DP PCMIA 3

PowerCore CPCI-3750 Single Board CompactPCI Computer

SIEMENS 6ES5 440-8MA11 DIGITAL OUTPUT MODULE

SIEMENS 6FC5247-0AF11-0AA0 SINUMERIK 810D/840D PROFIBUS

HILSCHER CIF-50-PB COMMUNICATION MODULE INTERFACE CIF50PB

SIEMENS SIMODRIVE 6SN1146-1AB00-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 #2NC

SIEMENS Sinumerik 800M. 6FC3986-3EU Operator Panel.

SIEMENS MOORE 123712-386 REPAIR KIT FOR MODEL 74 VALVE POSITIONER 41493

Allen-Bradley Panelview 1200 Operator Interface 2711-TC1X

5800: 430-450Mhz Total Surveying Solution 90D

ABB Upper arm cable w/cust. conn. part# 3HAA0001-YH

A06B-0153-B175#7076 FANUC SERVO MOTORS REMANUFACTURED

7451 IC 14 Pin Dip- Dual 2-Wide 2-IN AND/OR/Invert Gate

RELIANCE ELECTRIC 40V2060 NSFP 40V2060

ALLEN BRADLEY 1785-L80E/E USPP 1785L80EE

ALLEN BRADLEY 150-B35NBDA-J1 USPP 150B35NBDAJ1

GETTYS 110-0221 USPP 1100221

TRICONEX 4107 USPP 4107

TECH MOTIVE TOOL 48S440-31023 USPP 48S44031023

FOXBORO P0400DA-0K USPP P0400DA0K

Siemens 6ES5-103-8MA03/6ES5103-8MA03 CPU MODULE 24VDC XLNT

SIEMENS 6ES5 373-1AA61 -- 6ES53731AA61

SIEMENS 6ES5-942-7UB11/6ES5942-7UB11 CPU MODULE XLNT

Siemens 6ES5 755-2CA11 NSFP 6ES57552CA11

Siemens 6ES5 312-5CA11 6ES5312 6ES53125CA11

Siemens LOGO! DM8 230R 6ED1 055-1FB00-0BA1 Module NIB

Rev 1.1 SuperMicro H8DAE-2 Bulk Pack MB Support Dual Core CPU

Texas Instruments 2587678-8008

Spirent Adtech 400308A AX/4000 ATM DS1 Interface

VMware 2U Server 4x Six-Core Istanbul 2.6GHz 128GB RAM

Siemens C79458-L2197-A1

Modicon AS-T984-101

Schneider Modicon AUTOMATION DEP 218/AS-BDEP-218

Schneider Modicon AS-8535-000 AS8535000 High Density Connector

Schneider Modicon AS-BADU-205 ASBADU205 Analog Input LNC

Schneider Modicon AS-B805-016 115VAC Input Module ASB805016

Schneider Modicon PLC PC-0984-381 AS-9584-000

Schneider Modicon AS-S482-500 S-Pack AS-IS

SCHNEIDER 6728-042.270385 DAP216 OUTPUT MODULE XLNT

Sharp JW-234N Input Module 32POINT 12/24VDC 4.5MA High Speed

RELIANCE 57C416/0-57416 REMOTE I/O COMM MODULE NIB

Siemens 6ES7 322-5GH00-0AB0 OUTPUT MODULE 16DO 24-48VU

SIEMENS SINUMERIK 6FC5247-0AA16-0AA1 6FC52470AA160AA1 NIB

NUMATICS 239-1514 DEVICENET COMMUNICATION MODULE

SIEMENS SIMODRIVE 611 6SN1118-0DJ21-0AA1

SIEMENS SINUMERIK OP012 6FC5203-0AF02-0AAL Membrane Keypad

SIEMENS HANNIFIN 6F-C6L-1-BN-B USPP 6FC6L1BNB

AllenBradley1771-OBD/BOutputModule

ALLEN BRADLEY SLC500 BASIC MODULE 1746-BAS C 1746BAS C

ABB PLC MODULE PM581-ETH MODULES

York Liquid Chiller LCH10W-45B _ LCH10W45B _ LCH1OW-45B _ LCH1OW45B

[eh.shop] Water Quality Controller Dissolved Oxygen controller from Korea

MODICON AS-584L-231 NSFP AS584L231

ALLEN BRADLEY 1395-A70N-D2-P10-X1 USPP 1395A70ND2P10X1

GRAHAM 130AW5 NSPP 130AW5

GE FANUC IC3600SHPB1E1 USPP IC3600SHPB1E1

SIEMENS 6SE6-430-2AD32-2DA0 NSFP 6SE64302AD322DA0

SIEMENS 6AV3-627-1QK00-0AX0 NSFP 6AV36271QK000AX0

ALLEN BRADLEY 1494V-DR622-A NSFP 1494VDR622A

Siemens 6ES5 922-3UA11 -- 6ES59223UA11

Siemens S5 6ES5 955-3LF41 POWER SUPPLY UNIT 5V 8 AMP

SIEMENS 6ES5-482-8MA11 USPP 6ES54828MA11

Siemens 6ES5 430-8MC11/6ES5430-8MC11 INPUT MODULE NIB

Siemens S5-100U 6ES5 931-8MD11 - FREE SHIPPING

Siemens DCS Module 6DS1703-8RR

SCHNEIDER TSXDMZ28DR TSX MICRO PLC I/O MODULE QUANTITY

Square D 8803-PS01

SIEMENS 6ES5312-3AB12 SIMATIC S5 INTERFACE MODULE 6ES53123AB12

WE SHIP SAME CISCO WS-C3750G-24PS-S CATALYST 3750G-24PS SWICTH 1 YR WARRA

SIEMENS 6GK7342-2AH01-0XA0 CP342-2 6GK7 342-2AH01-0XA0

Siemens TP27 6AV3 627-1NK00-2AX0 Touchscreen Glass

Schneider Modicon TSX AS WBXT 201 Bus Extension Cable

Schneider Modicon AS-BDAU-204 ORIGINAL BOX Compact Analog OUT ASBDAU204

Schneider Modicon AS-B814-001 NSFP ASB814001

Schneider Modicon PROGRAMMABLE CONTROLLER 884 AS-884A-311

Schneider Modicon AS-P190-212

Schneider Modicon AS-BDAP-210 8-Point Isolated Output Module NIB

SCHNEIDER TSXDSY16T2 OUTPUT MODULE TSXDSY16T2

SIEMENS 6ES7 321-1BH02-0AA0 INPUT MODULE 6ES73211BH020AA0

Samsung MMCRE28GTDXP-MVB01 128GB 1.8

SIEMENS DRMC-11-51 4720 POWER METER OPERATOR INTERFACE GOOD TAKEOUT

SIEMENS SINUMERIK 810 BOARD 6FX1126-1AA01

SHIMADZU CBM-10A COMMUNICATIONS BUS MODULE

SIEMENS 6SN1146-1AB00-0BA1 6SN1 146-1AB00-0BA1 SIMODRIVE 611 Infeed Module

SIEMENS 6SL3000-0DE21-6AA0 6SL3 000-0DE21-6AA0 Simodrive HFD Reactor

SIEMENS 6FC5114-0AA01-0AA2 6FC51140AA010AA2 version B

ALLENBRADLEYISOLATEDOUTPUTPLCMODULE1771-ODZFACTORYSEALEDC15-3-52

ALLEN BRADLEY X137860 NSFP X137860

ABB DSQC 323 8MB Memory Expansion Board 3HAB 5956-1 - Brand

ADI-TSSOP-AD5292BRUZ-20 IC good quality

(A13) 1 GOULD MODICON AS-M507-016 REV A3 MEMORY MODULE A13

INDRAMAT TWM1.1-100-300-W1/115 NSPP TWM11100300W1115

YASKAWA ELECTRIC CIMR-F7U40371E USPP CIMRF7U40371E

FANUC A20B-0007-0010 USPP A20B00070010

EUROTHERM CONTROLS TC3041/AC/03/100A/120V/220V140/120/4MA20/PA/0/UDR/3D/IND/V2/0

RELIANCE ELECTRIC DPS1A NSFP DPS1A

ORMEC MAC-B200F/K1A NSPP MACB200FK1A

PHOENIX DIGITAL OCM-CTN-13-P-D-ST-ACV NSFP OCMCTN13PDSTACV

Siemens 6ES5 451-7LA21 6ES54517LA21

Siemens 6ES5-923-3UA11 USPP 6ES59233UA11

SIEMENS 6ES5-420-4UA12 USPP 6ES54204UA12

Siemens 6ES5 451-7LA11

Siemens S5 6ES5 431 8MA11 6ES54318MA11

Siemens 6SL3 211-0AB17-5UB1 6SL3211-0AB17-5UB1

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

Spectrum Controls 8000STC-222

NEHB442ASP-N POWERLINK AS POWER INTERFACE MODULE

WS-X4516 Cisco Supervisor Engine V 4516 Control processor

Siemens 6ES7 952-0KF00-0AA0 6ES79520KF000AA0

Siemens S5 PLC Cable PC-TTY 6ES5 734-1BD20 NIB FS

Reliance 14C310U

Schneider Modicon GROUPEAS-HDTA-200 NNB

Schneider Modicon AS-B266-500 USPP ASB266500

Schneider Modicon AS-S290-011 NSPP ASS290011

Schneider Modicon AS-B862

Schneider Modicon AS-B804-116 115VAC Output ASB804116

Modicon MM-16MP-001 Interface Panel AS-040A-003

SIEMENS S5 6ES5464-8ME11 Analog Input Module

SIEMENS 6ES5 482-4UA11 DIGITAL I/O MODULE

SIEMENS S5 6ES5 456-4UA12 Digital Output Module

SIEMENS 6FC5210-0DA20-1AA0 6FC5 210-0DA20-1AA0 SINUMERIK 840D MMC 103 Version B

SIEMENS SINUMERIK 840DE NCU 561.4 6FC5356-0BB14-0AA0 NIB

SIEMENS 6SN1114-0NB01-0AA0 Simodrive 611U Option- Profibus DP3 Version B

SIEMENS SIMODRIVE 611 BOARD 6SN1118-0DJ21-0AA1NIB

SIEMENS 6FC9320-5DB00 6FC93205DB00 Fast Shipping

Advantech PCA-6114P4-C REV.C1

ALLEN-BRADLEY 1771-OB PLC DC OUTPUT MODULE 8 POINT REFU

ABB ADVAC 15kV 1200A AA251777000000P Vacuum Circuit Breaker 5 cyc 15 kV 1200 Amp

ADEPT 10332-48712 PROCESSOR MODULE 040 IDE

6SA8831-5EF40 issue A SIEMENS AC-Supply DRIVE SIMOVERT VC Simovert USV/UPS

960 Altera EPM7064STC44-7 IC

STROMBERG SAFT-164-AIO USPP SAFT164AIO

CUTLER HAMMER 92-01815-03 USPP 920181503

CARRIER HK50AA020 USPP HK50AA020

NEMATRON CORP IWS1634R4 USPP IWS1634R4

MICROSTAR LABORATORIES DAP2400E USPP DAP2400E

FISHER ROSEMOUNT 3095MA3CA0013AA00NABS5 NSPP 3095MA3CA0013AA0

Siemens 6ES5 242-1AA32 -- 6ES52421AA32

Siemens 6ES5-470-4UC12 USPP 6ES54704UC12

SIEMENS 6ES5-180-3AA11 USPP 6ES51803AA11

SIEMENS S5 Interface Module 6ES5 318-8MB12

Siemens 6ES5 315-8MA11 6ES5315 8MA11

Siemens 6ES7901-1BF00-0XA0 TP27 Download Cable FreeShip

SIEMENS touch panel 6AV3627-1QL01-0AX0 TP27-10

Siemens 6ES5431-7LA11

iPhone Android Samsung iPod Bluetooth Interface module Volvo car kit VOL01A3

YOSHIMURA PIM2 PERIPHERAL INTERFACE MODULE HONDA CRF250R 2010-11

Siemens 6ES7 134-4GB01-0AB0 6ES7134-4GB01-0AB0

Siemens OEM-OP37 6AV3 637-7AB16-0AM0 Membrane Keypad

Parker AXL-DRIVE

Schneider Modicon AS-B875-111 Analog Input B877-111 ASB875111

Schneider Modicon AS-521P-007 USPP AS521P007

Schneider Modicon AS-M484-204 USPP ASM484204

Schneider Modicon AS-8535-000 NSPP AS8535000

Schneider Modicon 16 POINT 115V OUTPUT MODULE AS-B804-016 LOT OF 3

Schneider Modicon DEP210/AS-BDEP-210 INPUT MODULE NIB

SIEMENS TI TEXAS INSTRUMENTS 505-4332 INPUT MODULE

Schneider/Telemecanique Inverter ATV312HU15N4 NIB

Siemens SIMULATOR MODULE INPUT/OUTPUT 6ES5-788-8MA11

Siemens 4700-BDRMC3-11HN Power Meter Software Ver 2.3.0.4 White Digital Readout

SIEMENS Sinumerik 840 1P-6FC5103-0AD13-0AA0 1P6FC51030AD130AA0 _ 570-524-9101-00

CISCO WS-SVC-CMM COMMUNICATION MEDIA MODULE

SIEMENS SIMODRIVE 6SN1145-1BA01-0BA1SINUMETIK 840D NCU-BOX 6FC52476FC5357 #2ZP

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1SINUMETIK 840D NCU-BOX 6FC52476FC5356 [3]

ADVANTECH PCA-6103P2VX Rev.B1

Allen-Bradley 2711-T9C1 PanelView 900

ABB 3HAC022104-002 PC Board Flash Disk

Accuray 64844-001 64844001 Process Interface Board CSQ

A200M6CX CUTLER HAMMER SIZE 6 NON REVERSING STARTER - - (D)

810A20A ALLEN BRADLEY 810 A20A

SIEMENS 6ES5-948-3UA21 USPP 6ES59483UA21

ASEA BROWN BOVERI 57360001-KG/8 USPP 57360001KG8

ALLEN BRADLEY 8600-F18C USPP 8600F18C

MEASUREX 053676-00 USPP 05367600

HONEYWELL 51305552-100 USPP 51305552100

ALLEN BRADLEY 150-B35NBD USPP 150B35NBD

SCHWEITZER ENGINEERING SEL-279 USPP SEL279

Siemens 6ES5-375-1LA71 USPP 6ES53751LA71

SIEMENS 6ES5 451-7LA11 OUTPUT MODULE 6ES54517LA11 6ES5-451-7LA11 REPAIRED

SIEMENS 135U 6ES5 524 3UA13

Siemens PLC 6ES5-340-3KB42/6ES53403KB42

Siemens 6ES7 314-1AG13-0AB0 6ES7314-1AG13-0AB0 in Box

Siemens PLC 6ES5-421-8MA11 6ES54218MA11 6ES5421-8MA11

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

GSM/GPRS Modem Pool 16 Ports USB interface Wavecom Module AT Commands Q2403A

Tripp Lite PS/2 Server Interface Module

Siemens 6AV3627-1QL01-0AX0 LCD Display

Siemens Inverter Card 6SE7 090-0XX84-0FJ0

Modicon SW-DO5T-0TA

Schneider Modicon Discrete Input Relay AS-BDEP-210 ++ ++

Schneider Modicon AS-PRTU-252 AC Pwr Sply Ext Temp ASPRTU252

Schneider Modicon AS-E480-904 USPP ASE480904

Schneider Modicon ASWBXT201 Compact Primary Rack AS-WBXT-201

Schneider Modicon AS-B357-001 ASB357001 N90

Schneider Modicon OUTPUT MODULE AS-B820-000

Schneider TSXMFP032P Mem Card

Schneider Modicon TSX PCU1030 TSXPCU1030 PLC Cable

SiemensSinumerik6FC5403-0AA20-1AA06FC54030AA201AA0

SIEMENS 6DC1-006-1BC/6DC1006-1BC CIRCUIT BOARD NIB

SIEMENS Communication Submodule 6DD1688-0AE0 SS5 SURPLUS - Orig. Box

GE/General Electric Communication Module IC600CB516/B

SIEMENS Simodrive LT Modul 80A 6SN1123-1AA00-0DA0

SIEMENS SINUMERIK 6FC5203-0AF02-0AA0 Membrane Keypad fast shipping

SIEMENS Neptune 500 Gallon Chemical Tank with 4 metering Pumps

Allen-Bradley Panelview 1200 Operator Interface 2711-KC1

5KV 200A INDOOR/OUTDOOR MINI LOAD INTERRUPTER LI SWITCH

ABB YM110001SF BOARD ABB PFVK 105A YM110001-SF

A06B-0315-B201#7008 FANUC SERVO MOTORS REMANUFACTURED

75 HP 364TS ODP ELECTRIC MOTOR 3600 PREMIUM Efficient for HVAC or Compressors

RELIANCE ELECTRIC 57552-D USPP 57552D

ALLEN BRADLEY 20BD125A3NNNANC0 USPP 20BD125A3NNNANC0

ALLEN BRADLEY 1756-L55M12 NSFP 1756L55M12

GRAHAM 85-0200-00 NSPP 85020000

WAUKESHA 015-UI USPP 015UI

TELEMECANIQUE VZ3-IM1500M1207 NSFP VZ3IM1500M1207

GE FANUC IC600CP600 USPP IC600CP600