ASHRAE Handbook98.R36 REFRIGERATION IN THE CHEMICAL INDUSTRY

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1、CHAPTER36REFRIGERATIONINTHECHEMICALINDUSTRYFlowSheetsandSpecifications...............................................36.1EquipmentCharacteristics......................................................36.3Refrigeration—ServiceStart-UpandShutdown.......................

2、....................................36.4orUtility..............................................................................36.1Refrigerants.............................................................................36.5LoadCharacteristics.......................

3、........................................36.2RefrigerationSystems.............................................................36.5SafetyRequirements................................................................36.2RefrigerationEquipment.............................

4、............................36.6CHEMICALindustryrefrigerationsystemsrangeincapacityMostprocessflowsheetsindicatethedesignmaximumrefriger-fromlessthanonetonofrefrigerationtothousandsoftons.ationloadrequired.TherefrigerationengineershouldalsoknowtheTemperaturelevelsra

5、ngefromthoseassociatedwithchilledwaterminimumdesignload.Processloadsinthechemicalindustrytendthroughthecryogenicrange.Thedegreeofsophisticationandinter-tofluctuatethroughawiderange,creatingpotentialoperationalrelationwiththechemicalprocessvariesfromthatassociatedwit

6、hproblems.comfortairconditioningoflaboratoriesorofficestothatwheretheFlowsheetsalsoindicatethesignificanceoftherefrigerationproductionofreliablerefrigerationisvitaltoproductqualityortosystemtotheoverallprocessandthedesirabilityofprovidingthesafetyoftheoperation.redu

7、ndantsystems,interlockingsystems,andsoforth.InsomeHowever,twosignificantcharacteristicsidentifymostchemicalcases,refrigerationismandatorytoensuresafecontrolofaprocessindustryrefrigerationsystems.Almostexclusively,theyareengi-chemicalreactionortoachievesatisfactorypr

8、oductqualitycontrol.neeredone-of-a-kindsystems,andequipmentusedfornormalcom-Inothercases,lossormalfunctionoftherefrigerationsystemhasmerci