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HRL Technology Group Pty Ltd ABN 89 609 887 327 [email protected] hrl.com.au Melbourne Level One Unit 4 677 Springvale Road Mulgrave VIC 3170 Phone +61 3 9565 9888 Fax +61 3 9565 9879 Morwell Tramway Road Morwell VIC 3840 Phone +61 3 5132 1500 Fax +61 3 5132 1580 Queensland Unit 2 33-37 Rosedale Street Coopers Plains QLD 4108 Phone +61 7 3423 4300 Fax +61 7 3345 5937 1 Optimising performance of integrated solar combined-cycle power plants hrl: Optimising performance of integrated solar combined-cycle power plants Providing expert design and analysis services to proponents or operators of integrated solar combined-cycle power plants Challenges Proponents and operators of solar integrated plants face complex challenges in determining and optimising the performance of their plants. Location, time-of-day, weather and design of the solar collector system have an impact on plant performance. A solar plant’s effectiveness in improving a conventional power plant’s efficiency also depends on how the two plants are connected. Supplying solar-heated steam at low temperatures will achieve very little increase in output. Supplying steam at higher temperatures, while more effective, can reduce the solar collector’s efficiency and increase its cost. The challenge is determining the unique optimum arrangement for a particular installation. Solutions hrl: Process Design Team provides expert design services to those proposing new integrated solar thermal power plants. The team also provides expert analytical services to operators of integrated solar plant. The team draws on many years of experience in using the Thermoflow suite of software to design and analyse conventional and gas turbine combined cycle power plants. These skills can also be drawn on to model power plants that include solar thermal collector systems. The Thermoflow programs the hrl: team uses in its expert design and modelled services for conventional and gas turbine combined-cycle power plants include Steam Pro, Steam Master, GT Pro and GT Master. Such designs can be imported into a ThermoFlex model containing solar collector and thermal storage models. Within the modelling software, solar devices can be connected to a power plant model and to determine overall performance under a wide range of conditions. If required, models can be designed using only Thermoflex. A field of parabolic trough solar collectors Benefits In providing clients with expert design and analysis services – for assessing conventional and gas turbine plants with, or without, solar collectors – HRL Technology Group’s Process Design Team provides numerous benefits including: • expert services from experienced personnel • fast design and analysis services • accurate, authoritative and independent design and analysis services • plant operation results that can be combined with EEO (Energy Efficiency Opportunities program) and greenhouse credits assessment to produce accurate financial modelling • quick evaluation of the impact of adding solar collector systems to power plants • assessing plant performance using biomass fuels.

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Page 1: Optimising performance of integrated solar combined-cycle …s3-ap-southeast-2.amazonaws.com/wh1.thewebconsole.com/wh/7507/images/... · Providing expert design and analysis services

HRL Technology Group Pty Ltd ABN 89 609 887 327 [email protected] hrl.com.au

Melbourne Level One Unit 4 677 Springvale Road Mulgrave VIC 3170 Phone +61 3 9565 9888 Fax +61 3 9565 9879

Morwell Tramway Road Morwell VIC 3840

Phone +61 3 5132 1500 Fax +61 3 5132 1580

Queensland Unit 2 33-37 Rosedale Street Coopers Plains QLD 4108 Phone +61 7 3423 4300 Fax +61 7 3345 5937

1

Optim

isingpe

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ceofintegratedsolarc

ombine

d-cyclepo

werplants

hrl:

Optimisingperformanceofintegratedsolarcombined-cyclepowerplants

Providingexpertdesignandanalysisservicestoproponentsoroperatorsofintegratedsolarcombined-cyclepowerplantsChallenges

Proponentsandoperatorsofsolarintegratedplantsfacecomplexchallengesindeterminingandoptimisingtheperformanceoftheirplants.Location,time-of-day,weatheranddesignofthesolarcollectorsystemhaveanimpactonplantperformance.Asolarplant’seffectivenessinimprovingaconventionalpowerplant’sefficiencyalsodependsonhowthetwoplantsareconnected.Supplyingsolar-heatedsteamatlowtemperatureswillachieveverylittleincreaseinoutput.Supplyingsteamathighertemperatures,whilemoreeffective,canreducethesolarcollector’sefficiencyandincreaseitscost.Thechallengeisdeterminingtheuniqueoptimumarrangementforaparticularinstallation.

Solutionshrl:ProcessDesignTeamprovidesexpertdesignservicestothoseproposingnewintegratedsolarthermalpowerplants.Theteamalsoprovidesexpertanalyticalservicestooperatorsofintegratedsolarplant.TheteamdrawsonmanyyearsofexperienceinusingtheThermoflowsuiteofsoftwaretodesignandanalyseconventionalandgasturbinecombinedcyclepowerplants.Theseskillscanalsobedrawnontomodelpowerplantsthatincludesolarthermalcollectorsystems.TheThermoflowprogramsthehrl:teamusesinitsexpertdesignandmodelledservicesforconventionalandgasturbinecombined-cyclepowerplantsincludeSteamPro,SteamMaster,GTProandGTMaster.SuchdesignscanbeimportedintoaThermoFlexmodelcontainingsolarcollectorandthermalstoragemodels.Withinthemodellingsoftware,solardevicescanbeconnectedtoapowerplantmodelandtodetermineoverallperformanceunderawiderangeofconditions.Ifrequired,modelscanbedesignedusingonlyThermoflex.

Afieldofparabolictroughsolarcollectors

Benefits

Inprovidingclientswithexpertdesignandanalysisservices–forassessingconventionalandgasturbineplantswith,orwithout,solarcollectors–HRLTechnologyGroup’sProcessDesignTeamprovidesnumerousbenefitsincluding:• expertservicesfromexperiencedpersonnel• fastdesignandanalysisservices• accurate,authoritativeandindependentdesignand

analysisservices• plantoperationresultsthatcanbecombinedwithEEO

(EnergyEfficiencyOpportunitiesprogram)andgreenhousecreditsassessmenttoproduceaccuratefinancialmodelling

• quickevaluationoftheimpactofaddingsolarcollectorsystemstopowerplants

• assessingplantperformanceusingbiomassfuels.

Page 2: Optimising performance of integrated solar combined-cycle …s3-ap-southeast-2.amazonaws.com/wh1.thewebconsole.com/wh/7507/images/... · Providing expert design and analysis services

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Modellingagasturbinecombinedcycleplantcoupledtoasolarthermalsteamgeneratorcapableofproducingpartiallysuperheatedhighpressuresteam Theparabolictroughsolar-fieldheatsathermaloilwhichispumpedthroughaseriesshellandtubeheatexchangerswhichpreheatfeedwater,generatesteam,andsuperheatsteam.Thethermaloiltemperaturesarelimitedtoabout400°Ctherebyrequiringfinalsuperheatingofthesteamintheheatrecoverysteamgenerator(HRSG).ThesolargeneratorreceivespartiallypreheatedfeedwaterfromtheHRSG,andreturnssuperheatedsteamwhichismixedwithhighpressure(HP)steamexitingthefirstsuperheater(HPS0).Themixtureissuperheatedtofinalsteamturbinethrottleconditionsofapproximately550°C.Modellingsuggeststhesolarfieldcancontributeapproximately6.5percentoftotalplantpoweraddingsome3.9percentagepointstoplantefficiency.Themodestimprovementscomewithlittleimpactonthecombinedcycleoperation.Solarsystemsmakingagreatercontributionaddcomplexitytoplantdesignandtoplantoperationinnon-solarmode.Inadditiontocalculatingplantperformance,themodellingalsoprovidesanestimateofplantcost.

Modellingasolarcollectorwiththermalstorageintegratedwithaconventionalsteamplant Afieldofparabolictroughsolarcollectorsisusedtoheatthermaloilwhichisthenstoredinathermallystratifiedtank.A‘solarboiler’generatessteambycoolingthermaloil,drawnfromthestoragetank,inaseriesoftubeandshellheatexchangers.ThesteamfeedsaRankinecyclepowerplant.Thetank’sperformanceismodelledusingsourcesandsinks.Thesolarfieldisfedfromasourceat295°Crepresentingthecoldbottomofthetank.Heatedoilfromthesolarfieldisfedintoasinkformedinthetopofthetank.Hotliquidforthesteamgeneratorisdrawnfromthetopofthetankandcoolthermaloilisreturnedtothebottomofthetank.Themodel,inconjunctionwithanE-LINKworkbook,isusedtoanalysesystemoperationoverdailycyclesthroughouttheyear.Themodellingalsoprovesanestimateofthecosttoconstructtheplant.

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Needmoreinformation?Gotohrl.com.au

Thecompany’sNATAAccreditedLaboratoriesnumberis561.

HRLTechnologyGroup’sISO9001QualityManagementiscertifiedbyBSIundercertificateFS605116

Ó2016HRLTechnologyGroupPtyLtd

V20170430QA1034


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