THE HONG KONG AND FAR EAST BUILDER
WATER CONSERVATION IN REFRIGERATING EQUIPMENT
DJ Jusz BSP + Bonu
Gilmand In, Linh Trung Kug
Ju all applications of patrigeration heat in ugimaciol Coon www medium und traturred to coulber ude. Whort- ever wanted in the way of temperaturu Curfm:ti or undsture conturion to the peruse of doing in certnim yountities of haul are guimod which wont be discburgad Whilter we wuste this heal Turgy or stilbe il « muslim surend which will tako up and curry was the bent grins. 1 l worth while repeating that "awrbanied refrigntation extract heal at lower temperatures und diechoros its bant pain of blyber lempucatures."'"
The part through which is discharged the heat ex- tracted. Tropt nur kubject al conllug is the condenser. The medium to winch all beat gšīns resulting from the re frigeration, prozess are trunkleyre through the cnidensees is either ulr or water. Atmospherly air can take m
with the help otsa Enty or Tower over the condenser su Free mad, Dext ja varetul away from the countenser, usitally Do The atipoxphište. The tale at which the Test is carried away depends on the surface area of the condenser and the temperature of the incomiui gase. The të of sirgooded condensing units it limited by the fact that the speelfr heat el air la Qgy BPC. This incans that në pallad Kroughly 14.5 cu.B%) of aur cat curry Inis qliantity of heat away at IF ternerature difference. Though the dit-engled com- denser vait eually work un a 20 Jemperature difference, the quantity of ar apt area of condenser surface woull be too great on cobleusing units over three tim cupaci‡). For [hb] rewgoly monilėnising links in to three bón Canuelty miy are avïmally badlit with air colęd conjunkers.
The aperille heat of water Is †20. which mesia. That one "pound of water can fako 11p me BTU with 1F temperature immense. It would seam that water Ib a amfe cœurenivuti heat carrier for vin purpurse that alr. All condensing units at three LP we then for exiipped with water-szobai condensers. In the simplest miranjeinami water la pasaril through a combination of calls and the water. through - Four contact picke mi the heat from the mårlgetant to la liqnifie Origholly the wider ana sitppllel Iton sy mymilable cource, city water sells me mal after pusslinge thagh the condenser was wasted in its sewers 'ne obler- Kip.
Obelomely water cooled units won mcessary and more practical for bigger Installations and Water was freely Herend for these. Raamily' ihm comstmption of water had M- crens In Brge cities to such am stuit that limft#blous Itaya bomen led on the tree of water for refrigeration equipment Mornover. very often the sewers were 10t sofelem to take on the wosta wntar. Kemin the worum= point of view tim cost of water mal also to be rousidered.
These are the general conditions which prompted the refrigeration industry ta introduce muna by which water- contul units could be used. Tising water for cooling puy- poses without wasting it is important, but for Hong Kong there are othbur camliturus which have to be considered Serwoudly. First of all is the water shoplogo during thu alidess porlod Next is thu fact that an the huge poal- war increase in the population of Hong Kong stringwit restrictions have bray placed ou du me of walo für tu- dustrial purposes: Thuu uten of using the E WOLET. DARE and cover ugali for cooling purpose hizo now been devol en The binal inte budimi all method of reusing the wator is “avaporativa soling “ As previouely explained, ia the mommul proruss une pound of water pleks up une KTTİ when the tramperstore le caused by 1-5 Working on, suv a 20aÞ trmperature diffrene are used bulwan the com- densor inlet and notlet com porod of water waril cus mway 20 BTUS. Supposing manus cup bu Čound by which we urn ohio in evaporata mie imit of unter lubu thu Bur- rounding atmosphere. To do this we cut will approxi- mately 100 BTU: The subutior is on hund if wo foi means to evaporate the quantity of watur in mode to die- pose of 1000 BTU's heal content from mir reftiguration syatern.
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Vacions mana tury bon used to accomplish this spray pronta, olmospburi vouting towers, mechanics) draft cooling towers -ġil mupirotka vunderwri Tr thing w remember for that minu wuter roullug towers and comporo- kivæ comdamsera digonid on et■poration us■ muxus to effal cooling in principle thusro is in differance between u mechinten draft coofing lostor nuk un evaporative wuden. sai. In both the watt is cooled for asuin uut re-circulu- tinn lý avapurating part of the water, wilub iure to kam Teplenishal from Duking xomw of walor
The diffrence between the two mebjuda: Is that in tha mechmier draft smiling towers the cooled water is pumpul fhrimp) thu condenses of the condensing units; whilal in the evaporation endingsor the pompressed refrixerani gosto nire conveyed by the pussite prodnevů by thủ undpressora tra coil system over whili matur is corral. The water spudy comes in cominet with the bot volls currying tho refrixerant mit ʼn buat sain men takes plove cousing evaporation of a certain moitite of the water.
Å YTLEK calculation will give ■n upproximate ide of the difformed in amatamption mhm autor is rested and in evaporative comling. Taking a 20-P temparatore diffirence wu buvo 10 wasin 600 pamls (12:IRKT2011. «hont di lamp: guilous, of water in dissipate the Tresulta of qua ton of Tatriyantim
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Through evaporative colity M: messi panda 12:000= Label which synalı 12 Imp. Bols to nehirve the Sam Affect. In practice things work but differently, but it is gaf ho data thana watm-cooled condensar will gOUISTE Tirts times the mint of water that in gand by an msporn.vn coordenar. appancs_ therefore, that for water commarentiim either mechamieni ruft cooling toxEN ur proporativa condensers me the pawET'.
The mumfnoturais of thkar type of equipment have laid down cerbrin moles in amble meats to dect the moment plunt. Bricks the nila mu os tulliva.
1 An una pomladi hans had to remity The heat of com- prozedam ka „dition to the refrigeraum Lead the glo Paled eipaeng meludes pour Tanda.
2. 4- Ure carally of an evaporalie Gourlenser ha Dempengad pt. Higher wel bulb températures amil at forET okousenslag Jemperatures. Tã f wel bull temperatura niid 105° F yondensing Température have been selected for tw nominal rating at evaporstler condeusers unul in freon
3 Tho umpunity of an uvaporative condenser varje mism with the saporating temperature in the pynyaralar.
Therofuga for the nominal ruling to evaporalur tem peralime has been sulurted:
Cunt, and tables pro popilahto showing varieclips futur in mmping for conditions differing from those of thm poginul roting
Battering to the primiple of evaporative condensere, nient gambitius už ulemosphork ale must be blown against the spony of Matur tu uus the requicut quantity of "water to avaporate and thog cury away the heal that maat he dissipatn Thok tou sausible bent tumparature differenval is converted into Intent busat nevaporation Lu order to prevent "worter portiolta passing to the atmospher emoziol devices the "ulimipular”, ku ingested in the animal vir milet.
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It is not the mrpose of this articla to describe oil du det. Tired to prodů o effective and sarvinwablu I'vaporativa condenser. Suffice in to my that the air tenveN the emorative condenar almost eatunted
In the op Ventil Type the fam required to cause the air movNNIAL through the water aprary ls of the exhamat type, comstiguant - by the moisturi laden wir enmes in contact with thu fun blades and can comes mensium and costing by mitural dev posits which am give thee to serious tromble after 2 stori tiine.