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MessagePosté le: Sam 15 Oct - 11:58 (2016)    Sujet du message: Air Blast Freezer Pdf Free Répondre en citant




Air Blast Freezer Pdf Free > shorl.com/vygridrihepygi

















































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Table,,,7,,,Freezer,,,operating,,,temperature.,,,These,,,methods,,,give,,,nearly,,,the,,,same,,,allowance,,,and,,,both,,,calculations,,,are,,,only,,,used,,,here,,,to,,,show,,,the,,,reader,,,how,,,these,,,refrigeration,,,allowances,,,can,,,be,,,applied,,,by,,,different,,,designers.,,,This,,temperature,,rise,,will,,depend,,on,,the,,heat,,load;,,therefore,,it,,will,,be,,higher,,at,,the,,start,,of,,a,,freeze,,than,,at,,the,,end.,,Although,,,,this,,,,worked,,,,reasonably,,,,well,,,,,a,,,,defrost,,,,was,,,,found,,,,to,,,,be,,,,essential,,,,to,,,,prevent,,,,fish,,,,sticking,,,,to,,,,the,,,,plates,,,,which,,,,are,,,,at,,,,a,,,,temperature,,,,below,,,,0C,,,,,and,,,,thus,,,,failing,,,,to,,,,form,,,,a,,,,compact,,,,block.,,,,Much,,,of,,,the,,,labour,,,may,,,have,,,been,,,transferred,,,to,,,another,,,part,,,of,,,the,,,process.,,,Even,,short,,delays,,due,,to,,plant,,breakdown,,or,,reduced,,performance,,of,,equipment,,can,,be,,expensive,,,especially,,when,,freezing,,at,,sea.,,Because,,,,of,,,,their,,,,versatility,,,,,batch,,,,air,,,,blast,,,,freezers,,,,are,,,,often,,,,misused,,,,by,,,,operators,,,,who,,,,do,,,,not,,,,realise,,,,their,,,,freezing,,,,limitations.,,,,Continuous,,,air,,,blast,,,freezers,,,may,,,economically,,,justify,,,air,,,speeds,,,in,,,excess,,,of,,,the,,,above-recommended,,,value.,,,In,,,,Figure,,,,7,,,,the,,,,air,,,,is,,,,shown,,,,to,,,,be,,,,correctly,,,,distributed,,,,by,,,,using,,,,suitably,,,,designed,,,,and,,,,properly,,,,spaced,,,,turning,,,,vanes.,,,,Fluidized,,,and,,,semi-fluidized,,,freezers.,,,

With,,,this,,,arrangement,,,,it,,,is,,,possible,,,to,,,return,,,the,,,bulk,,,of,,,the,,,cold,,,liquid,,,to,,,the,,,low,,,temperature,,,reservoir,,,at,,,the,,,start,,,of,,,defrost,,,,and,,,also,,,return,,,the,,,warm,,,defrost,,,liquid,,,to,,,the,,,hot,,,liquid,,,reservoir,,,for,,,reheating,,,at,,,the,,,start,,,of,,,the,,,next,,,freeze.,,,Liquid,,,,can,,,,remove,,,,more,,,,heat,,,,per,,,,unit,,,,volume,,,,than,,,,gas,,,,(eg.,,,,Attempts,,,,have,,,,been,,,,made,,,,to,,,,assist,,,,the,,,,release,,,,of,,,,the,,,,blocks,,,,by,,,,coating,,,,the,,,,plates,,,,with,,,,a,,,,low,,,,friction,,,,plastic,,,,material,,,,so,,,,that,,,,a,,,,defrost,,,,was,,,,unnecessary.,,,,There,,,,is,,,,however,,,,some,,,,difficulty,,,,in,,,,judging,,,,the,,,,correct,,,,air,,,,flow,,,,to,,,,produce,,,,the,,,,slight,,,,agitation,,,,required,,,,and,,,,a,,,,fixed,,,,flow,,,,rate,,,,is,,,,not,,,,suitable,,,,if,,,,a,,,,variety,,,,of,,,,products,,,,are,,,,to,,,,be,,,,frozen.,,,,In,,this,,freezer,,,the,,product,,is,,brought,,into,,direct,,contact,,with,,the,,refrigerant,,(Figure,,26).,,Batch,,air,,blast,,freezers,,use,,pallets,,,trolleys,,or,,shelf,,arrangements,,for,,loading,,the,,product.,,A,,,single,,,fillet,,,for,,,instance,,,will,,,take,,,4,,,times,,,as,,,long,,,to,,,freeze,,,in,,,the,,,relatively,,,still,,,air,,,in,,,a,,,cold,,,store,,,as,,,it,,,would,,,in,,,a,,,properly,,,designed,,,air,,,blast,,,freezer.,,,Again,,,,,as,,,,is,,,,the,,,,case,,,,with,,,,other,,,,types,,,,of,,,,freezer,,,,which,,,,rely,,,,on,,,,regular,,,,supplies,,,,of,,,,refrigerant,,,,,carbon,,,,dioxide,,,,freezers,,,,would,,,,not,,,,be,,,,suitable,,,,for,,,,use,,,,in,,,,remote,,,,areas.,,,,To,,avoid,,moving,,trucks,,within,,the,,freezer,,,a,,batch-continuous,,freezer,,can,,be,,designed,,with,,a,,cross,,flow,,air,,arrangement,,and,,the,,freezers,,may,,then,,be,,loaded,,from,,the,,side,,as,,shown,,in,,Figure,,9.,,

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