300MW机组冷端系统试验研究与性能优化

：300MW1112111.2500022.261204：300MW，，。，，0.371~0.583kPa，3.4℃，634.22w/（m2·℃）；，；A、B，，。，，1.7kPa，5.3g/（kW·h）。：；；；；：TK14：B：１００４-９６４９（２００8）11-００29-04：2008-03-13；：2008-06-23：（1966-），，，，，、，、。E-mail：[e-mail]0，，，、、。、、，，。300MWN-16300-1，1，31200HKT/A。，、、，。、，，。，。11.1N-16300-1；16300m2；32000m3/h；20℃（33℃）；5.7kPa；21400；D25mm×1mm×9808mm；9700mm；：HSn70-1A、B30（）、1Cr18Ni9Ti；：、、、、。1.25500m2；114.700m；7.728m；87.826m；52.214m；；1.5m；5440m2；：；：TP—（ABS）；：BO—45/160。1.3（A、B、C）12000HKT/A；：11520m3/h、24m、495r/min；（B）：9820m3/h、17m、424r/min。22.1。。：、。、。：、、、ＥＬＥＣＴＲＩＣＰＯＷＥＲ4111２００811Ｖｏｌ．41，Ｎｏ．11Nov.２００829411Tab.1Testdatabeforecondenserperformanceoptimization。2.2、、、、、。，，，、，。2.2.1：GWT=QTCPT×（tw2-tw1）（1）：CPT，kJ/（kg·℃）；QT（），kW；tw2，℃；tw1，℃。2.2.22，。，，。，。。。2.37，175MW、200MW、250MW300MW，232。，，，。0.5h，1h。3，。《》ASME《》。33.11。3.22。816，，6m4992m2，5462m2（、100m2），0.914。，5360m2。3.33.3.1，570.52t/h，33.34t/h，603.86t/h。637.07t/h，36.69t/h，673.76t/h，13.1%。，330MW，，676.04t/h，47.08t/h，723.12t/h，19.75%。1234567/MW203.05300.47251.40299.80176.40251.30199.60/（t·h-1）28262277732812536275282303603628204/kPa8.0710.038.368.967.917.868.38/℃30.51431.39629.51231.32930.20830.85231.057℃38.98143.84539.86140.65337.79138.80339.736/℃8.46712.44910.3499.3247.5837.9518.679/℃41.70045.89142.37043.70041.32041.20042.420/℃2.7192.0462.5093.0473.5292.3972.684/℃-0.283-0.221+0.398-0.518-0.394-0.245-0.407/（t·h-1）445.0648.5543.5638.5397.5537.0442.5/（t·h-1）24.635.729.235.622.229.224.4/（t·h-1）469.6684.2572.7674.1419.7566.2486.9/（kg·（m2·h）-1）28.8141.9835.1441.3625.7534.7429.872Tab.2Correctedtestresultofwateroutlettemperaturefromcoolingtower123/MW300250250/（m3·h-1）277732812536036/kPa100.58100.61100.46/℃27.8125.9425.40/℃23.3922.5924.10/℃30.1731.1726.93/℃43.85739.82938.843/℃31.29129.47631.010/（m3·（m2·h）-1）5.055.116.55/%69.275.088.5/℃32.49332.35032.460/%61.460.153.130：300MW11，，，。，。3.3.231.47℃，32.50℃，。：1.5m，，325m2，；；，53%~61%，，0.3~0.5℃，300m2；，5500m2，5462m2。3.3.3，。。250MW，0.92kPa/min，。，1.5~2.5℃，，。“”，，，，，1、2，。3.3.43，21，，228000t/h，34000t/h，246.4。，，41.2，12.45℃，8.91℃，3.54℃，1.5kPa。，330MW，，，240，60~70。4，。，，，，。4.12070，，，，。“”，，。，，；，，，，，，，，。，。，，，。4.2，。，，，，。4.3A、BA、B，18000t/h，2，；。4.4（1），。（2），，，，。55.123。，，，20℃0.371kPa；30℃0.583kPa，。3.4℃，634.22W/（m2·℃），，，。3141Testresearchandperformanceoptimizationofcoldendsystemfor300MWturbineunitWANGXue-dong1SUNWei-guo2CHENYi-sen1WANGXue-tong11.ThermalEnergyDepartmentofShandongElectricPowerResearchInstituteJinan250002China2.WeifangPowerPlantWeifang261204ChinaAbstract:Basedonthetestdataforthecoldendsystemof300MWturbineunit,severalissueswereintroducedontheretrofitofsteampassageflow,includingtheoperationperformanceandproblemsofcoldendequipment,theperformancematchingbetweenturbinepropertyandcoldendsystem.Thecoldendequipmentwasretrofittedandoptimizedinperformance.Byinstalledguidingplatesattheinletofcondenser,thecondenserpressureandthetemperaturedifferencebetweenendsdroppedby0.371~0.583kPaand3.4℃respectively,whiletheheattransfercoefficientincreased634.22w/(m2·℃).Inlightwiththeperformanceoptimizationofcoolingtower,thewateroutlettemperaturehasbeenreduced.AftertheretrofitofAandBcirculatingwaterpump,theunitflowofpumpwasincreasedwithmoreflexibleoperationmodes.Aftertheperformanceopti-mizationofcoldendequipment,theoveralloperationperformanceofcoldendsystemwasimprovedwiththecondenserpressureandcoalcon-sumptionreducingby1.7kPaand5.3g/(kW·h)separately.Keywords:turbineunit；coldendsystem；coldendloss；testresearch；performanceoptimization3Tab.3Testresultsofcondenserbeforeandaftertheretrofitofinletsteampassage5.2，，18463t/h；，34668t/h，83.2%。，，723.12t/h，47.75，40.00，，，，。6300MW，，，，，，，，，。：［1］JB/T3344-1993，［S］.JB/T3344-1993，Testcodesforcondenserperformance［S］./MW306.813300.131/℃10.420525.7215/℃21.626037.5435/℃30.292042.7000/kPa4.45908.7945/℃9.24405.7965-3.4475/℃0.57800.64000.0620/℃11.205511.8220/kW390317.16403547.73/（w·（m2·℃）-1）1704.342338.56634.2220℃/kPa6.5206.149-0.37130℃/kPa11.01110.428-0.583▲。，1.93，60%。。，1.93、、。，。，、、60%。10，5。4，4.2%20%。32