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partofthesideWallofaneliminatorfacesthelowerpartofthe sideWalloftheadjacenteliminator. According to this embodiment, an effect is obtained in addition to the effect obtained by the ?rst embodiment of the inventioninthatpressurelossbetWeentheeliminatorscanbe reduced, since the eliminators positioned adjacent to each other are positioned to be stepped With each other so that the upperpartofthesideWallofaneliminatorfacestheloWerpart of the side Wall of the adjacent eliminator, as a result the heightofthesideWallpartsoftheeliminatorsdirectlyfacing to each other With a small gap Which may generally be the case can be reduced. Further, Water droplets scattered from the sprinkler head impinge against the side Walls of the eliminators located adjacent to the eliminators Which are located in loWer posi tions by the stepped arrangement of the eliminators, and the impinged droplets groW in its siZe and less tend to be sucked upWardbythefan,thus?yingoutofWaterdropletsiseffec tivelyprevented. 20 10 FIG. 10 is a schematic representation of an ammonia refrigerating unit of prior art provided With an evaporation typecondenser. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferredembodimentofthepresentinventionWillnoW bedetailedWithreferencetotheaccompanyingdraWings.Itis intended,hoWever,thatunlessparticularlyspeci?ed,dimen sions, materials, relative positions and so forth of the con stituentpartsintheembodiments shallbeinterpretedasillus trative only not as limitative of the scope of the present invention. FIG. 1(A) is a pressure-enthalpy diagram of the ammonia cycleandthatofCO2 cycleofthepresentinvention,inWhich thebrokenlineshoWsanammoniarefrigeratingcycleandthe solid line shoWs a CO2 cycle of forced circulation. Liquid CO2 producedinabrinecoolerissuppliedtoarefrigeration load side by means of a liquid pump to generate forced cir culationofCO2. The dischargecapacityoftheliquidpump is determined to be equal to or larger than tWo times the circu lation?oW requiredbythecoolersideinWhichCO2 ofliquid orliquid/gasmixedstate(imperfectlyevaporatedstate)can beevaporatedinordertoalloWCO2 toberecoveredtothe brine cooler in a liquid state or liquid/gas mixed state. As a result,evenifthebrinecoolerislocatedatthepositionloWer than the refrigeration load side cooler, liquid CO2 can be suppliedtotherefrigerationloadsidecoolerandCO2canbe returnedtothebrinecoolerevenifitisinaliquidorliquid/gas mixed state because enough pressure difference can be secured betWeen the outlet of the cooler and the inlet of the brinecooler.(ThisisshoWninFIG.1(A)inWhichCO2 cycle isreturnedbeforeenteringthegaseousZone.) Therefore,asthesystemisconstitutedsuchthatCO2 of liquid or liquid/gas mixed state can be returned to the brine coolercapableofalloWingevaporationinaliquidorliquid/ gas mixed state (incompletely evaporated state) even ifthere isnotenoughhydraulicheadbetWeenthebrinecoolerandthe refrigeration load side cooler and there is a someWhat long distancebetWeenthem,thesystemcanbeappliedtoallrefrig eration systems for cooling a plurality of rooms (coolers) irrespective of the type of cooler such as bottom feed type or topfeedtype. Various block diagrams are shoWn in FIG. 2. In the draW ings, reference symbol A is a machine unit integrating an ammoniarefrigeratingcyclesectionandamachineunit(CO2 brineproducingapparatus)integratingaheatexchangingsec tionofammonia/CO2 (Whichincludesabrinecooleranda CO2 pump) and reference symbol B is a freeZer unit for cooling(freeZing)refrigerationloadsidebythelatentheatof vaporizationandsensibleheatoftheCO2 brine(liquidCO2) produced in the machine unit A. Next, the construction of the machine unit A Will be explained (see FIG. 3). In FIG. 3, reference numeral 1 is a compressor.Ammonia gascompressedbythecompressor1is condensedinacondenser2,thenthecondensedliquidammo nia is expanded at the expansion valve 23 to be introduced to aCO2brinecooler3tobeevaporatedthereinWhileexchang ing heat, and the evaporated ammonia gas is introduced into the compressor 1, thus an ammonia refrigerating cycle is performed.CO2 brinecoolsarefrigerationloadWhileevapo ratinginthefreeZerunitB isintroducedtothebrinecooler3, WherethemixtureofliquidandgaseousCO2iscooledtobe condensed by heat exchange With ammonia refrigerant, and thecondensedliquidCO2 isreturnedtothefreeZerunitB by Further,accordingtotheinvention,bycomposingtheheat exchangertobeaninclinedmultitubularheatexchangerhav inganinletheaderforintroducingcompressedammonia gas tobedistributedtoHow intothecoolingtubes,andattaching abaf?eplatetotheheaderatapositionfacingtheinlet25 openingforintroducingcompressedammoniagas,ammonia gas introduced from the inlet opening impinges the baf?e plateandevenlyentersthetubesoftheinclinedmultitubular heatexchanger. BRIEF DESCRIPTION OF THE DRAWINGS The invention Will be described With reference to certain preferred embodiments of the invention and the accompany ingdraWings,Wherein; 30 35 FIG. 1 represents pressure-enthalpy diagrams of a com binedrefrigeratingcycleofammoniaandCO2,WhereinFIG. 1(A) is a diagram of the cycle When Working in the system accordingtothepresentinvention,andFIG.1(B)isadiagram 40 ofthecycleWhen Working inthesystemofpriorart; FIGS.2(A)~(D)areavarietyofconnectiondiagramsofthe ?rst to fourth embodiments of the invention; FIG. 3 is a schematic representation shoWing the total con?gurationofamachineunit(CO2brineproducingunit)45 containing an ammonia refrigerating cycle section and an ammonia/CO2 heat exchanging section and a freeZer unit for refrigeratingrefrigerationloadbyutiliZinglatentheatof vaporizationofliquidCO2 brinecooledinthemachineunit sidetoaliquidstate; FIG.4isaHow diagramoftheembodimentofFIG.3; FIG.5isagraphshoWingchangesofrotationspeedofthe liquidpump andpressuredifferencebetWeentheoutletand inletoftheliquidpump ofthepresentinvention; FIG. 6isaschematicrepresentationofthesecondembodi mentshoWingschematicallythecon?gurationofanammonia refrigerating unit provided With an evaporation type con denser; 50 55 FIG. 7(A) is a partial cutaWay vieW to shoW the construc tionoftheevaporationtypecondenseroftheammoniarefrig 60 eration unit of FIG. 6, FIG. 7(B) is a horiZontal sectional vieW ofthepartsurroundedbyacircleofchinlineinFIG.7(A),and FIG. 7(C) is a vertical sectional vieW of the same part; FIG. 8 is a detail vieW of arrangement of eliminators of the unitofFIG.6; FIGS. 9(A) and 9(B) are refrigeration systems of prior art combining an ammonia cycle and a CO2 cycle; and 65 US 7,992,397B2PDF Image | AMMONIA CO2 REFRIGERATION SYSTEM
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