Overview of System 系統(tǒng)概況
Chilled Water System / 冷凍水系統(tǒng)
There are 8 (7 use and 1 standby)Chillers at the boiler room for Plant II to provide chilled water (7?C Supply/15?C Return)pressurised by chilled water pumps to AC equipment, Process equipment inproduction building & socialbuilding respectively as shown in the schematic drawings.
由設(shè)置在鍋爐房的8臺冷凍機(jī)(七用一備)通過冷水水泵提供冷水(7度供水/15度回水)到相對應(yīng)的生產(chǎn)廠房、綜合樓內(nèi)的空調(diào)設(shè)備,、工藝設(shè)備,，如系統(tǒng)圖所示。
Cooling Condenser Water System/冷卻水系統(tǒng)
There are 11 sets (10 use + 1 standby,and left 1 spare space for future installation) Cooling towers at the roof ofboiler room for Plant II to provide condenser water pressurised by condenserwater pumps to condenser, PCW system, and CDA compressor respectively as shownin the schematic drawings.
由設(shè)置在鍋爐房屋面的11臺冷卻塔(其中10臺運(yùn)行,一臺備用,另留一臺的空位作為遠(yuǎn)期預(yù)留)通過冷卻水泵分別向冷凍機(jī)的冷凝器,工藝?yán)鋮s水系統(tǒng),及空氣壓縮設(shè)備提供冷卻水,，如系統(tǒng)圖所示,。
注：本課件以“奧特斯”方案為例，作者：JackieWan,。
General System Description 系統(tǒng)描述
There is one chilled water plant,located in boiler room building (C5), serving production building, socialbuilding.
一個(gè)獨(dú)立的冷凍站位于鍋爐房內(nèi)(C5),，為主廠房,綜合樓提供冷凍水。
All chillers are designed as low temperaturechiller , the low temperature system operates on a 7℃ /15℃ basis.
冷凍水系統(tǒng)為低溫冷凍水系統(tǒng),進(jìn)出水溫為7℃ /15℃,。
Low temperature chilled water isrequired for all cleanroom make-up air units, and used for RCU fornon-cleanroom area where humidify requirement are more onerous and the RCU for cleanroom area, social building,and process cooling water system, and so on.
在潔凈室新風(fēng)處理系統(tǒng)中均使用低溫冷凍水系統(tǒng),， 低溫冷凍水系統(tǒng)使用在濕度要求較高和中溫冷凍水不能將空氣冷卻至要求露點(diǎn)溫度的生產(chǎn)區(qū)新風(fēng)處理系統(tǒng)。潔凈室新風(fēng)處理系統(tǒng)中的預(yù)冷盤管系統(tǒng),，非潔凈新風(fēng)處理系統(tǒng),，及工藝?yán)鋬鏊到y(tǒng)均需用到低溫冷凍水。
Please see the attached schematicdrawings and layout drawings #1
請看示意圖及平面圖 #1
The primary and secondary pumps arede-coupled to ensure that the direct drive pumps and variable speed pumps canbe operated independently and with dynamic stability. The primary pumps arematched to the chillers, the chillers are enabled to ensure that the coolingcapacity of all users can be attained at all times. To ensure that this isalways achieved two measurements are taken on the primary and secondary side ofthe chilled water system, namely the supply and the return water temperatures.The number of chillers shall be started as a result of this calculation.Chillers do not operate at their maximum COP at full load, the actual maximumCOP of the selected chillers is vendor reliant. The distribution of COP’sacross the full operating range of the selected chiller shall determine thepoint at which the BMS initiates a signal to enable the next chiller. Thiscontrol method could be done by a dedicated chiller control system as suppliedby individual chiller manufacturer.
一次泵和二次泵分別連接,，以確保直接驅(qū)動泵和調(diào)速泵能夠在動態(tài)穩(wěn)定的工況下獨(dú)立工作,。一次泵容量與冷凍機(jī)相匹配，冷凍機(jī)確保各使用點(diǎn)在任何情況下能滿足其需求,。因此可以保證任何情況下一次泵和二次泵側(cè)即供回水溫度達(dá)到要求,。冷凍機(jī)啟動數(shù)量將根據(jù)水力計(jì)算來定。在滿負(fù)荷時(shí)冷凍機(jī)不能達(dá)到最大能效比,。最大能效比點(diǎn)應(yīng)由供應(yīng)商提供,。由能效比確認(rèn)在需要范圍內(nèi)開啟的冷凍機(jī)數(shù)量，樓宇監(jiān)控系統(tǒng)將發(fā)送信號給需要開啟的冷凍機(jī),。由冷凍機(jī)廠家提供的專門控制系統(tǒng),。暖通南社
One dosing pump for CHW system enablesthe injection of chemicals for CHW water treatment. Expansion vessels shall beinstalled to absorb the expansion and contraction of the water due totemperature fluctuation and to stabilise the system pressure.
用一個(gè)定量泵確保將化學(xué)品送至冷凍水系統(tǒng)進(jìn)行水處理。閉式膨脹水箱用于吸收由于水溫變化引起的熱脹冷縮想象,，可保持系統(tǒng)壓力穩(wěn)定,。
The system has one standby chiller withassociated pumps.
系統(tǒng)中有一臺冷凍機(jī)和與其相對應(yīng)的泵作為備用。
Condenser water System is installed atroof of boiler room building. All cooling towers are supported on an elevatedconcrete support structure. Condenser water pumps are located in the respectivechiller plant room. The use of cross flow towers is proposed.
獨(dú)立的冷卻水系統(tǒng)安裝在鍋爐房的屋面。所有的冷卻塔在屋面上都有混凝土基礎(chǔ),。冷卻水泵都放置于相應(yīng)的冷凍機(jī)房內(nèi)。采用橫流式冷卻塔,。
The Condenser Water system is based onthe temperature difference of entering and leaving water temperature of 5℃.Cooling Water, under design conditions at 32℃/37℃ in an open loop system.
根據(jù)項(xiàng)目需求提供的參數(shù),，在供回水溫度32℃/37℃的狀況下，冷卻水系統(tǒng)設(shè)計(jì)的進(jìn)出水溫差為5℃,。
The wet bulb temperature used fordesign is 28.2℃, (in winter used for 5℃).
濕球溫度是根據(jù)該項(xiàng)目提供的參數(shù),，為28.2℃。(冬季取5℃).
All condenser water pumps operate atconstant flow and the system is to be provided with 10+1 redundancy.
冷卻水泵均采用定流量泵,，并采用10+1的方式為系統(tǒng)提供冗余量,。暖通南社
The condenser water flow rate for eachcooling tower has been selected for 600 m3/h. The seasons in Chinamake it necessary to control the water outlet temperature of the condenserwater. All cooling tower fans shall be two speeds controlled. This is theeconomical way of controlling multiple equipment systems.
每臺冷卻塔的流量為600m3/h。每個(gè)冷卻塔均可獨(dú)立運(yùn)行且由二個(gè)單元組成,，每個(gè)單元都有各自獨(dú)立的風(fēng)扇,。冷卻塔的風(fēng)機(jī)采用雙速風(fēng)機(jī)，以便在中國不同的季節(jié)控制出水溫度,。這是一個(gè)相對經(jīng)濟(jì)的節(jié)能方案,。
In each water basin install a heat coilto prevent water freezing during winter time.
在每個(gè)冷卻塔的水盆中均設(shè)置加熱盤管以防止冬季氣溫較低時(shí)結(jié)冰。
The condenser water supply temperatureshall define the control of the system.
冷卻水控制系統(tǒng)將根據(jù)送水溫度來控制冷卻塔運(yùn)行的臺數(shù),。
One set chemical treatment equipment isinstalled for condenser water system.
一套化學(xué)水處理設(shè)備安裝用于冷卻水系統(tǒng),。
Start-up Procedure 啟動程序
Open all the auto vent valves on thesystem
系統(tǒng)管路自動排氣閥開啟
Make sure the chilled and cooling watersystems are filled with water.
確認(rèn)冷凍水系統(tǒng)及冷卻水系統(tǒng)為滿水狀況
Make sure the valves installed at theinlet and outlet of the cooling tower/chiller are open
冷卻水塔 / 冷凍水主機(jī)進(jìn)出口端閥門開啟
Make sure the valves installed at theinlet and outlet of the chilled water/cooling water pumps are open
冷凍水水泵 / 冷卻水泵 進(jìn)口端閥門開啟
Turn on the power and start up the fanof the cooling tower with local manual button
投入電源以手動啟動冷卻塔散熱風(fēng)扇
Turn on the power and start up thecooling water pump by local manual button, open the valve installed at theoutlet of the pump and adjust it to the required pressure by watching themanometer beside the valve.
投入電源以手動啟動冷卻水泵緩慢調(diào)節(jié)出口閥門，且目視出口端壓力表調(diào)整至所需揚(yáng)程
Turn on the power and start up theprimary chilled water pump by local manual button, open the valve installed atthe outlet of the pump and adjust it to the required pressure by watching themanometer beside the valve.
投入電源以手動啟動冷凍水一級泵緩慢調(diào)節(jié)出口閥門,，且目視出口端壓力表調(diào)整至所需揚(yáng)程
Turn on the power and start up the secondly chilled water pump by local manualbutton, and turn it to 40HZ.
投入電源以手動啟動冷凍水二級泵,，手動調(diào)整變頻器以40 Hz運(yùn)轉(zhuǎn)
Check and observe if the pressure of the system has been set up to therequired value
檢視系統(tǒng)運(yùn)轉(zhuǎn)壓力是否已建立至正確位置
Turn on the power and start up thechiller after confirming there’s nothing wrong
確認(rèn)無誤后投入電源啟動冷凍機(jī)
Observe the running state of the systemand check if the correct temperature of the supply and return water is set up
觀察系統(tǒng)運(yùn)轉(zhuǎn)情形進(jìn)出水溫是否已建立至正確位置
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