压缩机英文资料

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1、压缩机英文资料压缩机英文资料Thelattertwoareusedextensivelyinthedesignofrefrigerationequipment.Ifyouplacetwoobjectstogethersothattheyremaintouching,andoneishotandoneiscold,heatwillflowfromthehotobjectintothecoldobject.Thisiscalledconduction.Thisisaneasyconcepttograspandisratherlikegravitati

2、onalpotential,whereaballwilltrytorolldownaninclinedplane.Ifyouweretofanahotplateoffooditwouldcoolsomewhat.Someoftheheatfromthefoodwouldbecarriedawaybytheairmolecules.Whenheatistransferredbyasubstanceinthegaseousstatetheprocessiscalledconvection.Andifyoukickedaglowinghotembera

3、wayfromabonfire,andyouwatcheditglowingdimmeranddimmer,itiscoolingitselfbyradiatingheataway.Notethatanobjectdoesn't�thavetobeglowinginordertoradiateheat,allthingsusecombinationsofthesemethodstocometoequilibriumwiththeirsurroundings.Soyoucanseethatinordertorefrigeratesomething,

4、wemustfindawaytoexposeourobjecttosomethingthatiscolderthanitselfandnaturewilltakeoverfromthere.Wearegettingclosertotalkingabouttheactualmechanicsofarefrigeratingsystem,buttherearesomeotherimportantconceptstodiscussfirst.TheStatesofMatterTheyareofcourse;solid,liquidandgas.Itis

5、importanttonotethatheatmustbeaddedtoasubstancetomakeitchangestatefromsolidtoliquidandfromliquidtoagas.Itisjustasimportanttonotethatheatmustberemovedfromasubstancetomakeitchangestatefromagastoaliquidandfromaliquidtoasolid.TheMagicofLatentHeatLongagoitwasfoundthatweneededawayto

6、quantifyheat.Somethingmoreprecisethan"lessheat"or"moreheat"or"agreatdealofheat"wasrequired.Thiswasafairlyeasytasktoaccomplish.Theytook1Lb.ofwaterandheatedit1degreeFahrenheit.Theamountofheatthatwasrequiredtodothiswascalled1BTU(BritishThermalUnit).Therefrigerationindustryhaslon

7、gsinceutilizedthisdefinition.Youcanforexamplepurchasea6000BTUHwindowairconditioner.Thiswouldbeaunitthatiscapableofrelocating6000BTU'sofheatperhour.Alargerunitcapableof12,000BTUHcouldalsobecalledaoneTonunit.Thereare12,000BTU'sin1Ton.Toraisethetemperatureof1LBofwaterfrom40degre

8、esto41degreeswouldtake1BTU.Toraisethetemperatureof1LBofwaterfrom177d