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

1784-CPCIDS現(xiàn)貨 in stock! 歡迎來電咨詢~?。?

　廣州地鐵三號(hào)線集中冷站系統(tǒng)構(gòu)成及特點(diǎn)
　　廣州地鐵三號(hào)線集中冷站采用了施耐德高端PL C QUANTUM 控制器系列，對(duì)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(shí)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(diǎn)
　　與分站供冷方式相比，集中冷站供冷系統(tǒng)需要為多個(gè)車站供冷，在供冷范圍和數(shù)量上都要大得多，有以下幾個(gè)主要特點(diǎn)：
　　● 冷凍水傳輸距離長(zhǎng)。一般地鐵站距在1000米左右，本系統(tǒng)為6個(gè)車站供冷，冷凍水傳輸距離將達(dá) 2000～3000米。長(zhǎng)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(shí)易導(dǎo)致出現(xiàn)相互影響，需考慮整個(gè)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(jī)組，二級(jí)泵的形式。這種形式適應(yīng)了長(zhǎng)距離管路輸送阻力較大的情況，能夠減小末端系統(tǒng)對(duì)冷機(jī)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(hào)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(jī)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(zhǎng)，冷凍水從集中冷站到末端設(shè)備需要運(yùn)行數(shù)十分鐘，如果采用質(zhì)調(diào)節(jié)，則調(diào)節(jié)時(shí)滯太大。因此在實(shí)時(shí)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(shí)間內(nèi)(比如1天內(nèi))保持相對(duì)穩(wěn)定。
　　二級(jí)泵管路長(zhǎng)，阻力大，且流量直接受末端負(fù)荷的影響，因此二級(jí)泵采用變頻調(diào)節(jié)，可以達(dá)到較好的節(jié)能效果。同時(shí)為了保證通過冷水機(jī)組的水量，一級(jí)泵采用定速泵，并與冷機(jī)對(duì)應(yīng)運(yùn)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(jī)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(yùn)行調(diào)節(jié)無法正常進(jìn)行。
　　● 初調(diào)節(jié)目標(biāo)：
　　○ 驗(yàn)證系統(tǒng)可以達(dá)到設(shè)計(jì)工況
　　○ 實(shí)現(xiàn)系統(tǒng)的水力平衡，為運(yùn)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(jī)組的流量基本相同(如機(jī)組型號(hào)不同，則各機(jī)組的流量比值應(yīng)基本相同。流量比值=實(shí)際流量/設(shè)計(jì)流量)。且至少1個(gè)機(jī)組的閥門為全開狀態(tài)。
　　1、調(diào)整一級(jí)泵系統(tǒng)水力平衡
　　2、設(shè)計(jì)頻率整定

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

Schneider Modicon AS-J878-000

Schneider Modicon AS-P120-000 Power Supply 115/23VAC

Telemecanique ATV11HU09M3A 0.37kW Inverter in Box

SIEMENS 6ES5-431-8MC11/6ES54318MC11 INPUT MODULE XLNT

RELEASE SuperMicro X9DR3-F Motherboard FULL MFR

Siemens 4700-BDRC3-11HN Power Meter Product Revision: B Digital Readout

SIEMENS 6DD2920-0AC0 LIGHT INTERFACE MODULE IN BOX

TELEMECANIQUE TSX-SCM-2111 COMMUNICATION MODULE TSXSCM2111

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

SIEMENS SIMODRIVE (POWER SUPPLY) 6SN1145-1AA01-0AA1

SIEMENS 6FC5357-0BB12-0AE0 SINUMERIK 840D 6FC5247-0AA00-0AA3

Advantech PCM-5825

ALLEN-BRADLEY 1746-OVP16 SLC 500 OUTPUT MODULE SERIES C 20.4-26.4 VDC

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 84813

ADEPT TECH 10330-00500 USPP 1033000500

(#3593) Siemens Touch Panel TP27 6AV3627-1QK00-0AX0 Display NIB

HUNKAR LABS 72011 USPP 72011

TECH MOTIVE TOOL 40054P-7019 USPP 40054P7019

DOLAN JENNER SS400-10084 USPP SS40010084

CROUSE HINDS WSR6351 NSPP WSR6351

PACIFIC SCIENTIFIC SC752A001-02 USPP SC752A00102

MODICON AS-506P-002 NSFP AS506P002

HERION 59-989-15 USPP 5998915

Siemens 6ES5 308-3UB11 NIB Free Ship

Siemens 6ES5-525-3UA11 USPP 6ES55253UA11

SIEMENS 6ES5-372-0AA61/6ES5372-0AA61 MEMORY SUBMODULE NIB

Siemens 6ES5 232-1AA11 S5 PLC CARD CIRCUIT BOARD MODULE EMA-W88 56781

Siemens 6ES5-452-8MR11Output Module 4POINT 24VDC

SIEMENS 6GK7-242-2AX00-0XA0 6GK7242-2AX00-0XA0 FreeShip

Siemens TP177B 6AV6642-0BA01-1AX1 Touchscreen Glass

Siemens 6ES5725-2AC01

Landis Gyr Powers System 600 536-050 LOT Power Modules Trunk Interface HVAC

YASKAWA ELECTRIC JAMSC-B1051B USPP JAMSCB1051B

SIEMENS 6ES7 222-1HF32-0XA0 6ES7222-1HF32-0XA0 FreeShip

Siemens OP37 6AV3 637-1LL00-0AX1 Membrane Keypad

Red Lion PRA1-3021

Schneider Modicon AS-B810-008 Isolated Output Module 115 VAC ASB810008

Schneider Modicon AS-884A-200 USPP AS884A200

Schneider Modicon AS-P120-000 USPP ASP120000

Schneider Modicon AS-B239

Schneider Modicon AS-516P-008 CNC Memory Board AIPR/UVG

Modicon XBT FC044610 Telemecanique Magelis 24VDC 35W

Siemens Simatic S7-200 PLC 6ES7 221-1BF22-0XA0 DC Input Module

TELEMECANIQUE TSX-ASZ-200 TSXASZ200

Siemens Simatic Relay Output Module U-05T

Siemens 9610 9610DC-1155-GZZA Power Meter Display ION Ethernet Access NNB

SIEMENS Sinumerik FPCI/ISA 6FC5247-0AA02-1AA0 6FC5 247

SIEMENS 6SN1118-1NH00-0AA2 6SN11181NH000AA2

SIEMENS SIMODRIVE 6SN1123-1AA02-0FA0

SIEMENS I/O MODULE 6FC3984-3RA 6FC39843RA 64E/32AUSGAEN

Advantech PCM-3810 A2 PC/104

Allen-Bradley 2711-K5A8 PanelView 550 Operator Interface Panel

ABB 5SDD0760D0001 3BHL001862P0001 Thyristor for ACS1000 AC Drive

Acrison 305-0096 Gearbox BDF1.5 OUT THD

AAT-SOT23-5-AAT1106 2-CHANNEL STEP-UP PWM IC Controller

85179 , Dayton 1LNF4 AC Adj Frequency Drive, 20 HP, 3 PH, 460V

SIEMENS 6SE3-121-7DG40 NSFP 6SE31217DG40

ATLAS COPCO PF2102-S7-115R USPP PF2102S7115R

ASEA BROWN BOVERI DSQC 314B USPP DSQC314B

MITSUBISHI Q173-CPU-N USPP Q173CPUN

INDRAMAT MAC-132A-1-JD-4-C/230-R-0/DIS20LX/S001 USPP MAC132A1JD4C230R

ASEA BROWN BOVERI 3HAB2220-1 USPP 3HAB22201

TEXAS INSTRUMENTS PLC 500-2102 NSPP 5002102

Siemens 6ES5-441-4UA14 USPP 6ES54414UA14

SIEMENS 6ES5 482-8MA13 DIGITAL I/O MODULE

SIEMENS S5 6ES5 308-3UA12 Serial Interface 6ES53UA12

Siemens S5 6ES5 470-7LB12 Analog Output 6ES5470-7LB12

SIEMENS 6ES7 621-6BD01-0AE3 SIMATIC S7 C7-621 ASI Worldwide

Siemens S5 6ES5 928-3UB21 S5 6ES5928-3UB21 CPU CPU928B

PPT Machine Vision Impact C40 Processor Cables I/O Bd

Honeywell Ademco 4100SM Serial Interface Module

VW Volkswagen Jetta Golf GTI Bluetooth Interface Communication Module 1K8035730D

SIEMENS 6DS1212-8AB

Siemens LOGO! 230RC 6ED1 052-1FB00-0BA5 6ED10521FB000BA5

Omron 3G2A5-OC224

Schneider Modicon AS-P120-000 PLC

Schneider Modicon LEVEL-3 16K 3CARD CHASSIS 584 AS-584A-320

Schneider Modicon AS-H819-100 USPP ASH819100

Schneider Modicon Gould/ AS-984A-008

Schneider Modicon AS-BDAP-218

Schneider Modicon REED RELAY OUTPUT MODULE AS-B840-108 REPAIRED

Telemecanique HMI to Allen Bradley Logix1000 Cable

Schneider TELEMECANIQUE Modicon TWDNCO1M

Siemens6AV6641-0AA11-0AX06AV66410AA110AX0Panel

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

SIEMENS Sinumerik 6FC5111-0CA02-0AA2 DMP KOMPAKT 16A 24V/0.5 E-Stand A

GE FANUC COMMUNICATIONS CONTROL MODULE IC693CMM311R

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

SIEMENS SINUMERIK 12.1" TFT OPERATOR INTERFACE PANEL 6FC5203-0AF02-0AA1

SIEMENS IBM 6400 Model 010 Printer Ribbons - IBM 6400 Model 10

ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8

A-B NIPPONDENSO 8500-B1C-L1B Motors-AC Servo [PZ4]

AC Motor Invertor - 30 HP - 600 Volt - Three Phase Input

A06B-0602-B027 GETTY'S DC SERVOMOTOR MODEL 20

750' Rider 500-500-350 USE Wire Direct Burial Aluminum Triplex

RELIANCE ELECTRIC S6R-9006 NSFP S6R9006

ALLEN BRADLEY 5250-LP3 NSFP 5250LP3

ALLEN BRADLEY 20AB070A0AYNANC0 NSFP 20AB070A0AYNANC0

INDRAMAT KDV1.3-100-115 USPP KDV13100115

YASKAWA ELECTRIC CACR-W57-FJ4ER USPP CACRW57FJ4ER

WESTINGHOUSE 292B315A19 USPP 292B315A19

IAI RCS-SSI-60-H-400-S-B USPP RCSSSI60H400SB

Siemens 6ES5-244-3AB31 USPP 6ES52443AB31

SIEMENS 6ES5 376-1AA31 6ES53761AA31

SIEMENS Interface Module 6ES5-312-5CA11

Siemens Analog Input Module 6ES5 460-7LA12

Siemens 6ES7 131-0BL00-0XB0 6ES7131-0BL00-0XB0 ET200B

SIEMENS MP370 12.1" MP370-12 6ES7542-0DA10-0AX0 Touch Screen Display Glass

Reliance Automate 30 45C305A 45C305 Processor

Texas Instruments 505-4508

STATIC CONTROLS 920-M-2-V 4.3 INTERFACE DISPLAY MODULE

UBR7246VXR CISCO UBR 7246 4MC 2PA SLOTS 1YR - ASK 4 QTY

Siemens Control Board C98043-A1304-L Simodrive

Modicon AS-WBXT-201

Schneider Modicon NIBAutomation Output Module DAP 210/AS-BDAP-210

Schneider Modicon AEG/GOULD/MODICON/ AS-E381-902 EXECUTIVE CARTRIDGE XLNT

Schneider Modicon AS-BDEP-112 NSFP ASBDEP112

Schneider Modicon ASBDAP216 Compact Out Module AS-BDAP-216

Schneider Modicon -AS-500P-000

Schneider Modicon DAP 218 DAP218 Output Module AS B075-000 94V

Schneider Proximity Sensor XS530B1DAL2 NIB DC12-48V

SCHNEIDER MODICON TSX QUANTUM 115V AC INPUT MODULE 140 DAI 540 00

QX41 Mitsubishi PLC 32 Point DC Input

SIEMENS 6ES5456-4UA12 Digital Output Module NIB-FS

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

Mitsubishi AJ71UC24 Melsec Communication Module Link

SIEMENS SIMODRIVE 6SN1118-0NH11-0AA0

SIEMENS SINUMERIK CNC KEY BOARD 6FC5203-0AC00-0AA2

SIEMENS /MOORE QLCAMAAN QUADLOG CAM MODULE 16404-1/1

ALLEN-BRADLEY VERSAVIEW CE 1500H 6182H-15BRH4D 6189-RPRH LOGIC MODULE

Allen Bradley SLC 500 1746-OB16 Ser D Output Module 10-50VDC

ABB ROBOTIC DRIVE 3HAB-5845-1/2-DSQC334

A06B-0147-B075#0008 FANUC SERVO MOTORS REMANUFACTURED

01KA509430 RELIANCE DC MOTORS

NACHI AUXL-111 USPP AUXL111

ALLEN BRADLEY 1756-L53 NSPP 1756L53

ALLEN BRADLEY 1336-B015-EAE-S1 USPP 1336B015EAES1

GENERAL ELECTRIC 531X122PCNACG1 NSFP 531X122PCNACG1

SQUARE D S164N NSPP S164N

SIEMENS 6SE7021-0EA61 USPP 6SE70210EA61

BALDOR GHF2030BH USPP GHF2030BH

Siemens 6ES5 944-7UB21 6ES59447UB21

Siemens Simatic S5 6ES5 928-3UB11 CPU 6ES5-928-3UB11

SIEMENS 6ES5-701-1LA12/6ES5701-1LA12 9-SLOT EXPANSION RACK NIB

Siemens 6ES5 482-8MA13 I/O MODULE 6ES54828MA13

Siemens 6AV3607-1JC30-0AX1 OP7 in Box ping Worldwide

Siemens Inverter 6SE9521-0DC40

Samsung NP400B2B-A01US Notebook laptop 2.50 GHz 12.5" Screen Size 1.3 MP Cam

Syscon C400FJA3

SIEMENS Interface Module 6ES5310-3AB11 NIB Opened Compare @ 480.00

QUANTITY AVAILABLE SERIES A

Siemens 6SE7031-7HG84-1JA1

Siemens VAS5052A Touchscreen Glass

Schneider Modicon AS-BDAP-216N TSX Compact Current Source

Schneider Modicon ASB875101 Refurbished TESTED Analog INPUT Module AS-B875-101

Schneider Modicon AS-B846-002 MODULE ASB846002

Schneider Modicon 984 series of AS-B808-016 good in condition

Schneider Modicon Battery CELLS AS-5284-001

Schneider Modicon AS-H827-209 984 Series 11 Slot Rack ASH827209

Schneider Modicon PanelMate Plus 1000 MM-PM1030SC 92-01686-00

SIEMENS 6ES5 788-8MA11 Input Output Module

RME HDSPE PCI EXPRESS CARD INTERFACE MULTIFACE DIGI

siemens board 6FX1124-6AD02

SIEMENS Sinumerik DMP 16-E MODULE 6FC5111-0CA01-0AA0

RELIANCE ELECTRIC 57C404B COMMUNICATION MODULE NETWORK

SIEMENS CONTROLLER CARD 6SN1118-0NH11-0AA0

SIEMENS 6FC5-110-0BA01-1AA0 NSPP 6FC51100BA011AA0

AllenBradley2711-K9C9PanelView900SeriesARev.A

ALLEN BRADLEY VersaView 1200P TOUCH SCREEN OPERATOR INTERFACE 6181P-12TSXPH

ABB IMMOTION YGBF-20 FIELD CONVERTER EXCITER CONTROL MODULE 64G069D- 60835

Advanced Energy MDX Pinnacle DC Magnetron Power Supply AE 3152363-004A ~208

(N3-3) 1 FISHER ROSEMOUNT 41B5215X13R DISCRETE I/O CARD N3-3

MEASUREX 08495006 USPP 08495006

ALLEN BRADLEY 1336-B050-ECG-L3 USPP 1336B050ECGL3

GE FANUC IC697CGR935 USPP IC697CGR935

FANUC A16B-1010-0050 USPP A16B10100050

SIEMENS 6AV7-800-0BA00-1AC0 NSFP 6AV78000BA001AC0

RELIANCE ELECTRIC 30FR7731 USPP 30FR7731

SIEMENS 6EV3053-0CC USPP 6EV30530CC

Siemens 6ES5 470-4UC12 6ES54704UC12

Siemens 6ES5-947-3UA21 USPP 6ES59473UA21

SIEMENS 6ES5-440-8MA21 NSPP 6ES54408MA21

Siemens 6ES5 900 0AA11 6ES5-900-0AA11 807 1024 001 807-1024-001 BL2A SPCB460

Siemens S5 6ES5 951-7LB14 6ES59517LB14

SIEMENS C98043-A1200-P4

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

Square D 8030 CBP-107

OMRON C200H-IP006 PERIPHERAL INTERFACE MODULE

WS-C3550-24-DC-SMI CISCO 3550 SWITCH 24-10/100 2 GBIC PORTSDC-PWRD: SMI

Siemens 6ES7314-6CG03-0AB0

Siemens SIMODRIVE 6SN1130-1AA11-0EA0

Reliance SP500

Schneider Modicon ASP371001 Gould Program Pack AS-P371-100

Schneider Modicon AS-B546-000 USPP ASB546000

Schneider Modicon AS-W600-003 NSPP ASW600003

Schneider Modicon AS-BDEP-210 ASBDEP210 DEP 210 AC Input NIB

Schneider Modicon AS-B825-016 INPUT TRUE HIGH MODULE

MODICON ANALOG OUTPUT MODULE DAU 202 / AS -BDAU -202

SIEMENS ET 200X PLC INPUT OUTPUT MODULES 1BF11 1BF30 1DA00

Sharp JW50H JW-50CUH JW50CUH Control Module

Siemens Operator Interface Model 4700-DRMC3-11HN

SIEMENS SINUMERIK 6FC 3671-0FB-Z CONTROL RACK

TEKTRONIX COMMUNICATION DC POWER MODULE VSS75

SIEMENS 6SN1118-0NJ01-0AA1 SIMODRIVE 611 U HR 1-AXIS CONTROL LOOP BLOCK RESOLV

SIEMENS POWER SUPPLY SIMODRIVE 6SN1145-1BA01-0BA1

SIEMENS 6FC5-250-5PX10-3AH0 USPP 6FC52505PX103AH0

Advantech Remote Contact/Digital Input ADAM-4053

ALLEN-BRADLEY 1746-0AP12 SER. C REMOTE OUTPUT MODULE ""

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88143

ADEPT TECH 10332-00500 USPP 1033200500

(000 nolot) Allen Bradley Motor 31HP (Kw) 37.1V 1600 RPM 8720SM-030Z4JAS2

INDRAMAT DDC01.2.N050C-RL01-01-FW USPP DDC012N050CRL010

TELEMECANIQUE ATV-66D64N4U USPP ATV66D64N4U

EEC AEG THYRO-3M-500-495-HF USPP THYRO3M500495HF

CUTLER HAMMER 92-00988-02 USPP 920098802

PPT VISION 661-0306 USPP 6610306

MODICON AS-584A-039 USPP AS584A039

INDRAMAT CLC-P01.1 USPP CLCP011

Siemens 6ES5 312-5CA12 -FS- 6ES53125CA12

Siemens 6ES5-526-3LG11 USPP 6ES55263LG11

SIEMENS 6ES5-374-0BA11 NSPP 6ES53740BA11

Siemens 6ES5 308-3UA12 6ES53083UA12 INTERFACE S5-115