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

6RB2105-0SD01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(jìn)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(yuǎn)程I/O箱的遠(yuǎn)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(dá) 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(fù)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(fù)荷的影響，因此二級泵采用變頻調(diào)節(jié)，可以達(dá)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(jìn)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(jìn)行認(rèn)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(jìn)行。
　　● 初調(diào)節(jié)目標(biāo)：
　　○ 驗證系統(tǒng)可以達(dá)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

SIEMENS IBM 1040990 Printer Ribbons - IBM Printer Ribbons

Allen-Bradley VersaView 1750M 17 Touchscreen Color Monitor

ALLEN-BRADLEY 160-BA03NPS1 1HP 460VAC CONTROL

ABB K-line K1600S power air circuit breaker

ACCURAY 64829-003 USPP 64829003

A06B-6066-H222 FANUC SERVO AMPLIFIER REMANUFACTURED

75 HP 405T 1200 Explosion Proof Electric Motor

MODICON AM-C986-003 USPP AMC986003

SIEMENS 6RY1-243-0AA00 USPP 6RY12430AA00

ATLAS COPCO ETD-S7-50-13-CTADS USPP ETDS75013CTADS

ASEA BROWN BOVERI DCS502-B02505121 USPP DCS502B02505121

MITSUBISHI MR-J2S-11KB NSFP MRJ2S11KB

INDRAMAT MAC112D0ED1B130 USPP MAC112D0ED1B130

APW MCLEAN M17-0216-G009H USPP M170216G009H

TEST PRODUCTS T73879 NSPP T73879

Siemens 6ES5-440-5AA11 USPP 6ES54405AA11

SIEMENS 6ES5 482-8MA13

SIEMENS S5 6ES5 267-8MA11 6ES52678MA11

Siemens S5 6ES5 450-8MB11 Digital Output Module

SIEMENS 6ES7 621-1AD01-0AE3 C7-621 99%

Siemens RWX62.734/509 Controller

PreSonus FireStudio Firewire Mobile Studio Interface Bundle Extended

Honeywell 51400955-100 DCS Process Network Interface Board Module Card

Volvo V70 S60 01-06 GROM USB interface car module Bluetooth AUX iPhone VOL01U2P

Siemens 6DD1607-0CA1 6DD1 607-0CA1 in Box

Siemens LOGO! 12/24RC 6ED1052-1MD00-0BA6 NIB

Omron 3G2A5-MP00

Schneider Modicon AS-P120-000/ASP120000 Power Supply SEALED

Schneider Modicon BOARD AS-521P-011 REV 35 /REPAIRED

Schneider Modicon AS-H819-007 NSFP ASH819007

Schneider Modicon Gould/ AS-2802-000

Schneider Modicon AS-BDAP-216

Schneider Modicon Quantum 140CPS11420 Power Supply AS-IS

Telemecanique Digital Operator Panel VL 1006366598

Schneider Telemecanique Modicon TSX3721001

Siemens6ES5-452-8MR11Output Module 4POINT 24VDC

Siemens 6AV6 545-0BA15-2AX0 6AV65450BA152AX0 Panel

SIEMENS Sinumerik 6FC5110-0DB01-0AA1 E.Stand J CPU Interface Module

GE FANUC GENIUS COMMUNICATION MODULE IC693CMM301E

SIEMENS Simens Milacron Perm Motor 1-606-3505 and SimoDrive 6SC 6110-6AA00

SIEMENS Sinumerik 3FA 4B Rack 6FC 3881-0JA-Z

SIEMENS MOORE 115300-11 350 INDICATING STATION PROGRAM CARD PCB

ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8

A-B NIPPONDENSO 8500-A2D-L1A Motors-AC Servo [PZ4]

AC Motor Inverter - 60 HP - 480 Volt - Three Phase Input

A06B-0571-B072#7008 FANUC SERVO MOTORS REMANUFACTURED

750 kva Square D Transber HV 4160 3 LV 416Y/240 & 600a HVL Switch

RELIANCE ELECTRIC DSA-MTR-60D NSPP DSAMTR60D

ALLEN BRADLEY 506309 NSPP 506309

ALLEN BRADLEY 1791-IOVW USPP 1791IOVW

INDRAMAT HDS03.2-W075N-HS12-01-FW USPP HDS032W075NHS120

YASKAWA ELECTRIC CACR-SR15SZ1S-SY22 USPP CACRSR15SZ1SSY22

WELDING TECHNOLOGY CORP WI03-T13B USPP WI03T13B

HONEYWELL STF128-R1H-04530-S1-F1C3-714B USPP STF128R1H04530S1

Siemens 6ES5-243-1BA11 USPP 6ES52431BA11

SIEMENS 6ES5 376-1AA21 SUB-MEMORY MODULE

SIEMENS Input Module 6ES5 436 4UB12 SURPLUS

Siemens Adaption Casing 6ES5 491-0LB11 33422

Siemens 6ES6400-0EN00-0AA0 Micromaster Encoder FreeShip

SIEMENS MP370 12.1" 6AV6 545-0DA10-0AX0 Touch Screen Protective Film

RELIANCE DRIVE ANALOG I/O MODULE 57405-C

Texas Instruments 505-4308

STARTECH.COMS SERVER INTERFACE MODULE FOR PS/2 LET

UC520W-8U-4FXO-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI

SIEMENS Contactor 3TC4417-0AB4 NIB

Modicon AS-W978-015

Schneider Modicon Pathology 3rd Ed. by A.S. P.A. Szanto

Schneider Modicon AEG/GOULD/MODICON/ AS-C484-265 MAINFRAME CONTROLLER

Schneider Modicon AS-BDEO-216 USPP ASBDEO216

Schneider Modicon AS-BDAP-212 Compact Combo Module ASBDAP212

Schneider Modicon -AS-2184-011

Schneider Modicon DAP 216 / AS-BDAP-216 DISCRETE OUTPUT CARD MODULE 16 X 24 VDC

Schneider PLC 140 ACO 13000 140ACO13000 NIB Sealed

SCHNEIDER MODICON TSX QUANTUM 24VDC SOURCE INPUT MODULE 140 DDI 353 10

QY22 Mitsubishi PLC 16 Point Triac Output Card

SIEMENS 6ES5-456-4UA12/6ES5456-4UA12 DIGITAL OUTPUT MODULE NIB

SIEMENS SINUMERIK 6FC5203-0AF02-0AA1 MembraKeypad - OP012 free ship

MITSUBISHI COMMUNICATION MODULE A1SJ71QC24N R2 RS-232-C

SIEMENS SIMODRIVE 6SN1118-0DM21-0AA0 6SN11180DM210AA0

SIEMENS SINUMERIK CONTROL DRIVE MODEL 6FC 3451 OJA Z

SIEMENS 3Wa

Allen-BradleyPanelView 1200 Operator Interface 2711-TC1

Allen Bradley SLC 500 1746-OB32 Ser D 1746-0B32 Output Module

ABB robot, Fanuc robot, Motoman robot, Nachi robot,

A06B-0143-B188 FANUC SERVO MOTORS REMANUFACTURED

0190-09379 wPCB ASSY VME CPU SYNERGY UPGRADED

MTS SYSTEMS CO MPAZ-100-460-206 USPP MPAZ100460206

ALLEN BRADLEY 1756-L1M1 FNFP 1756L1M1

ALLEN BRADLEY 1336-B010-EAD-FA2 USPP 1336B010EADFA2

GENERAL ELECTRIC 502997 USPP 502997

SQUARE D PA360000M USPP PA360000M

SIEMENS 6SE3217-3DB40 NSPP 6SE32173DB40

AUTOMATION INTELLIGENCE 8207D82 USPP 8207D82

Siemens 6ES5 944-7UB11 -- 6ES59447UB11

Siemens Simatic S5 6ES5 526-3LF01 6ES55263LF01

SIEMENS 6ES5-701-1LA12 NSFP 6ES57011LA12

Siemens 6ES5 482-4UA20/6ES54824UA20 I/O Ver 02 SEALED OFFERS ACCEPTED

Siemens 6AV3503-1DB10 OP3 ping Worldwide

Siemens Inverter 6SE6420-2UC25-5CA1 6SE64202UC255CA1 in Box

Sans Digital HA-ARC-ARC1223X 2-Port Mini-SAS 6G SAS/SATA PCIe 2.0 x8 Controller

Superior Electric M063-FD09

SIEMENS Interface Module 6ES5 752-0AA43 WITH PAPERWORK

SER C F/W REV A PKG DATE 07/18/2011

Siemens 6SE7028-0ES87-2DA1 6SE7 028-0ES87-2DA1 FreeShip

Siemens USB/PPI+ USB PPI+ PLC Cable 6ES7 901-3DB30-0XA0

Schneider Modicon AS-BDEP-209 ASBDEP209 8 AC Input NIB

Schneider Modicon ASB875111 Analog Input Module AS-B875-111

Schneider Modicon AS-B840-108 USPP ASB840108

Schneider Modicon AS-B258-101 Analog MUX Mercury Relay 0 To 10 V B258-101

Schneider Modicon B872 4-20MA ANALOG CURRENT OUTPUT MODULE AS-B872-100 NO TERMINAL

Schneider Modicon AS-H827-107/ASH827107 Chassis Rack

SCHNEIDER MODICON TC2000 INDUSTRIAL PC OPERATOR INTERFACE 3515 KPM CASE BACK

Siemens 6ES5420-4UA13 Digital Input Module 32 DI 24VDC SIMATIC with Warranty

ROBOTRON 503-1-0324-07 USPP 5031032407

SIEMENS BREAKERS P/N: 1EC 60947 VDE 0660

SIEMENS Sinumerik CPU Slave 6FX1111-0AN02 E Stand E & 00

RELIANCE ELECTRIC AUTOMAX NETWORK COMMUNICATIONS MODULE 0-57404-1E

SIEMENS CONTROLLER CARD 6SN1118-0DM33-0AA0

SIEMENS 6SN1118-1NH01-0AA1 6SN1 118-1NH01-0AA1 SIMODRIVE 611-U Control Unit

SIEMENS 6FC5-110-0BB01-0AA1

AllenBradley2711P-RDT7C/C2711PRDT7CPanelviewPlus

ALLEN BRADLEY VersaView 1500M OPERATOR INTERFACE DISPLAY 6186-M15AL SER. B

ABB IEPAS02 SEAL DATE 11-29-10 POWER SUPPLY SEALED

ADVANCED ENERGY MDX DC power supply, lots of 7

(N2-3) 1 DATA PRODUCTS 30750732 MEMORY CARD N2-3

MEASUREX 053630-00 USPP 05363000

ALLEN BRADLEY 1336-B040-EJ6-FJ3-L1 USPP 1336B040EJ6FJ3L1

GE FANUC IC600LX680 NSPP IC600LX680

FANUC A14B-0070-B002 USPP A14B0070B002

SIEMENS 6AV6-545-0CC10-0AX0 USPP 6AV65450CC100AX0

RELIANCE ELECTRIC 2GU41010 USPP 2GU41010

SIEMENS 6ES7-157-0AC80-0XA0 NSPP 6ES71570AC800XA0

Siemens 6ES5 470-4UB12 6ES54704UB12

Siemens 6ES5945-7UA13 6ES5 945-7UA13 CPU945 S5-115U Processor 60 DAYS WARRANTY

SIEMENS 6ES5-440-8MA11 NSFP 6ES54408MA11

Siemens 6ES5 755-4AA11 SINEC H1 N TYPE COAX CON /BOX

Siemens S5 6ES5 943-7UA22 6ES59437UA22 CPU Module

SIEMENS C98043-A1035-L5

Siemens 6ES5 521-8MA21 6ES55218MA21

Square D 8020 SMM-115

Omega IM-Loader PC to Module Interface Cable

WS-C3560-48PS-S CISCO 3560-48PS SWICTH W/1 YR -WSC356048PSS Fast Shipp

Siemens 6ES7314-1AE04-0AB0

Siemens Simodrive 611 6SN1118-0NJ01-0AA1

Reliance F-014962

Schneider Modicon AS-P933-000 POWER SUPPLY ASP933000

Schneider Modicon AS-B545-000 NSFP ASB545000

Schneider Modicon AS-W512-003 USPP ASW512003

Schneider Modicon AS-BDEP-209 PLC

Schneider Modicon AS-B825-016 24vdc Input Module C PICS

MODICON AS-8228-100 NSPP AS8228100

SIEMENS HTRI-D DUAL INPUT MODULE

SHARP ZW-32IO2 USPP ZW32IO2

SIEMENS OPERATOR INTERFACE PMU 6SE7090 0XX84 2FA0 2FAO

SIEMENS Sinumerik 6EV3 055-0DC 810T Power Supply

Tektronix TDS2CMAX Module forGPIB IEEE488 RS232 Communication TDS1K & TDS2k

SIEMENS 6SN1118-0NH00-0AA2 6SN11180NH000AA2

SIEMENS Simatic Simodrive Card C98040-A1087. .

SIEMENS 6FC5303-0AA02-0AA0 HANDWHEEL CONNECTION MODULE XLNT

Advantech POS-562 REV.A1

Allen-Bradley 1746-NO4V SLC 500 4-Ch Analog OUTPUT Module

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88138

ADEPT TECH 10330-15350 USPP 1033015350

(000 no lot) Fanuc PLC 10 s rack 7cards IC693CHS391C IC693CPU331S . PRISTINE

INDRAMAT CLM01.3-X-0-2-B-FW USPP CLM013X02BFW

TELEMECANIQUE ATV-58HD33N4ZU NSPP ATV58HD33N4ZU

EDWARDS MC4160-C14 NSFP MC4160C14

CUTLER HAMMER 92005401 USPP 92005401

PHOENIX CONTACT IBS-ISA-SC/486DX/I-T NSFP IBSISASC486DXIT

MODICON AS-521P-008 NSPP AS521P008

HONEYWELL 51305508-200 USPP 51305508200

Siemens 6ES5 312-3AB12 6ES53123AB12

Siemens 6ES5-526-3LF11 NSFP 6ES55263LF11

SIEMENS 6ES5-373-1AA61/6ES5373-1AA61 MEMORY SUBMODULE NIB

Siemens 6ES5 306-7LA11 -- 6ES53067LA11

Siemens 6ES5-490-7LB21

Siemens 6GK7443-1BX00-0XE0 in Box

Siemens TP27 HMI 6AV3627-1QL00-0AX0 6AV36271QL000AX0

Siemens 6ES5927-3SA11

Lenel LNL-1300 Single Reader Interface Module

Yaskawa 87820-15003-S202 PLC Module 8782015003 NIB

SIEMENS 6ES7 223-1HF00-0XA0 in Sealed Box

Siemens OP37 6AV3637-1LL00-0FX1 Membrane Keypad ping Worldwide

Reliance 0-49002-2

Schneider Modicon AS-B805-016 800 I/O MODULE NIB

Schneider Modicon AS-884A-311 USPP AS884A311

Schneider Modicon AS-P230-080 USPP ASP230080

Schneider Modicon AS-B266-000 USPP ASB266000

Schneider Modicon AS-8534-000 Low Density Connector NIB

MODICON TELEMECANIQUE MAGELIS OPERATOR INTERFACE XBT F024110

SIEMENS SIMATIC S7 DIGITAL INPUT MODULE 6ES7 321-1BH02-0AA0 6ES7321-1BH02-0AA0

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 3T 548 025 9004

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 GNT0137200R0002 USPP GNT0137200R0002

TRIAD TR-18-8K-20 USPP TR188K20

Siemens 6ES5-450-3AA11 NSFP 6ES54503AA11

SIEMENS 6ES5 700-0LA11 6ES57000LA11

SIEMENS S5 6ES5 374-1KH215V Flash 256 kByte Memory 16Bit

Siemens S5 6ES5 955-3LF11 6ES5955 6ES595553LF11

Siemens 6ES7 972-0BA41-0XA0 6ES7972-0BA41-0XA0

Siemens S7 6ES7307-1BA00-0AA0

Siemens 335-37

Honeywell Interface Module Communicating Thermostat Telephone Access Module

WARRANTYSERIES A F/W REV 4.2

Siemens 6DS1730-8AA 6DS17308AA in box, seal opened,

Siemens LOGO! 24RCL PLC 6ED1 053-1HB00-0BA2

Omron 3G2A5-RM001-PEV1

Schneider Modicon AS-M680-008 8K 8 K RAM Memory Module