ms me Reprinted Am ri an Soci Societ et is Heat Heatin in Refr Refrig iger erat atin in an ir-C ir-Con on itio itio in ngin ngin ers, ers, Inc. Inc. ms Low Associate me Member dv nt ge mf o f h av av in in g p ro ro p gn nk e1 ma effic efficie ient nt device. device . T h a r c l d es es c b e h o mp mp Amou Amount nt of liqu liquid id as a nk nk s w o rk rk , h o he ca Amou Amount nt ofstea ofsteam. m. Ib Pressu Pressure, re, psi Temperature, operation. Liquid Liquid speci speciflc flc enthal enthalpy, py, Btu/lb Btu/lb Operation Steam specific specific enthal enthalpy, py, Btu/lb Btu/lb mp ms " f a sh sh in in g ma me h a o cc cc u w h e h o w a e r a t s om om e h ig ig he he r p re re ss ss u we We heatthat we e n h a p y o f h e q u a t h e h ig ig he he r p re re ss ss u a n h e n th th a p y o f s a u rraa te te d q u a t h e o w e p rree ss ss ur ur e T h n th th a p y o f v ap ap o o n h e h e qu h an an g he qu s te te a a t h e o w e p re re ss ss u e ) d e e rm rm in in e h o m u c o f h e q u c a b e c on on ve ve r e d s te te a b y t h h ea ea t a va va i a b e . o th th e w o rd rd s flas flas h s team team du c ha ha ng ng e )( 1- Total enthalpy enthalpy of steam, tu (X) (1.150 (1.150 w e g no no r h e o ss ss es es , h e e n h a p y o f h e h ig ig h p r s ssuu r wa mu w a e r a n s te te a e n e r n g h e a nk nk : Liquid Liquid enthal enthalpy py a t h ig ig h e p re re ssss uurr e (1 (309) h ea ea t e ne ne rg rg y a va va i a b 1.150 Total enthalpy enthalpy of liqu liquid id Bt L iq iq u i e n th th a lp lp y a t l ow ow e r p re re ssss u r (1 E n th th a p y o f s te te a a t l ow ow e r p re re ssss u r X) X ) 1 15 15 0 p rree ss ss ur ur e e ne ne rg rg y e qu qu i e d o r c ha ha ng ng e o f p ha ha s -or- /0 flash h ig ig h p re re ss ss u qu en ha py o w p re re ss ss u qu en ha py 70 e n h a p y o f e va va po po rraa t o n a t h e o w e p rree ss ss ur ur e F o e xa xa mp m p le le , o n p ou ou n o f b o n g w a e r s a u ra ra te te d 00 psig/338 (689 kPal 1 70 70 °C °C ) o w n g o m p ip ip e n t nk mo ph pr s u e . W h a a c o n X , o f h e w a e r w i a s n t s te te am am ? Fr we wa ma mu qu n th th a p y o r o t n th th a p y o r m. Th da om h e x am am p nd he bl b e s um um m a h ow ow n in Ta 0 .1 .1 3 o r 1 3 3 % qu A b ou ou t h e a u h o Roy C .E .E . A h g r Di on ns uc or wi Go Mo TT Be B. A c d em em y Ma us f ro ro m t h I llll in in oi o i s I ns ns titi tu tu t o f T e ch ch n ol ol og og y . T T F lu lu i Gr dm H an an d US Na He mp mb Be cooled m m asi mo OF pressurefrom mp ms Th mp F ig ig u "C). flash /0 Iittle more "C), 1. _u we Ib/hr 10 wh to will be ma ma an em nd 0.867 2 ,0 ,0 0 mm Th ma Handbook=Systems,' A SH SH R b /h /h r wa 86.70/0 influenced b y o th th e corn- ponents m. ma mp ma to ma wa mu ma ma lv we m. Th Bt mi mi Us we me condensate wa no q ui u i t p ro ro vi vi d mo allthe lo Un me mp to wa mp to p ro ro ce ce s u se se . wh mp mp Wh is mi F i gu gu r 2 . me o f w a e r If mp mp O F {100 0 C v en en t o s e s w i nd nsin nsin Load Load it Regula lati ting ng Valv Valves es Temperature Regu b e m in in im im a Vent mp tpo If Steam wo Vent we Vented Flash mi mi Vented flooding. ~: Condensate Pump x C ha ha n. n. , , . ( .c .c .a .a llll ed ed . a v en en t c on on de de ns n s e . .r.r ) . o c on on de d e .n .n " .r-r-r-r-:-; flas tank tank Fig re 1. Vented flas AS ASHR HRA£ A£ Jour Journa na Au De me wd wn psi 10 n u mb mb e mu oi mu Mu into wa as of s te te am am . n eo eo u me mu ul he h. We psig w i qu vo me us ec 26 mo As To Boiler Room P re re ss ss ur ur iz iz e ig re or 70 f la la s t a k. /0 0.133 I n d es es ig ig ni ni n 2661b/hr 26.8 tJ kg/s) /lb hr/),600 sec r= 1 .9 .9 8 f tltl /s /s e me o nd nd en en s p ip ip e vo es On wa om o mp mp l x i y . mo f la la s me n c e as as e he A S we will m/s) mi wi mi p re re s u re re . RA sizing? at mrn), p si si g i nd nd i lb/hr ma wa (0.03 kg/s) mp wi mp ,734 b /h /h r w a (957 kg/r kg/r ') and: steam, an Ib steam hr fl3 60 wi me mu _ ' 0.008- S te te a vo um W a te te r v o u m 1 .9 .9 8 T an an k v o u m 1 .9 .9 8 av mmen e d ASHR ASHRAE AE Jour Journal nal st 91 _::~~~=_:::~~~_ me It -~ Th wh mu wh nt l -- - --~ -, -1-- \'----------------r----\-"-_/ wa Hori Horizo zont ntal al Tank Tank me wh me me yl Fo of mp me wa s im im p l Figure wn Figure h e h ig ig h pa at on ve oc ma ma mu by al ow ng No wa Th me mo m. we s ep ep ar ar a i o Us v e o ci ci t e s we wh me half-full. ma mi bo mo b lo lo w o w pp ca on Us wh ow Figure wi me ve oc mp wi p re re s u r ea wi hi cc pt bl me ma to ws mi Figure 5 . T h gu me wi OUf Re mp 0.99 wi 1 ,0 ,0 0 mp 10 68 It/sec 0 . ft 1 ,0 ,0 0 lb/hr. Fo u r e xa xa mp mp l Volume ft /sec, a s w e Pa ma 1.98 ul be Usi mi Th et er er m in in e Figure 4 , w e d et m. F o o u x am am p D is is en en ga ga g n g a re re a Kn wi A, ma me .5 ft2/1,OOO lb/hr we 2 ,0 ,0 0 0 b /h /h r mm 1.0 ftl. ftl. in Table At me me me u s n g h e o rm rm u At wh me mo important. o r h o z on on t yl dr al a nk nk s Si h e o w p re re s u r o nd nd en en sa sa t pip ng us ng nd Co d"~ wi Additional Additional considerat considerations ions Be me mo wi mo wa he wa d ro ro p y in in g nt he ma (3 mls) mls) S om om e m a mo mo ws wa er Be me wa ma T h o nd nd en en sa sa t p i n g to b e w e l i ns ns u a te te d to d u he wi mp os mi m, wa Fo wa me considered. me If ~=============~---"""""-- wi wa mu ~-.---==-.. m- .8 07 H/se H/se 10 Hfsec Hfsec 0.,6 0,5 Q) 0. :: 10 l: <{ ,3 10 Q) II! is .2 Opsig 0,1 psig psig -----~- - ~ - - - - - ~ - - - - ~ - - - - - - - - - - - - - ~ - - 15psig - - - - - ~ - 240 la Figu Figure re se gi re re re 15 Flas Flas Tank Tank 1.4 Fl 1.3 Ta olum olum quir quir .c 1.1 Q) 0.0,9 10 l: 0.7 '0,0,6 10 0.5 II) is ,4 0..3 .2 0. 0~~~~~ 20 Fi ur A SH SH RA RA E Fl Au la 91 80 60 40 lu re re 10 140 150 20 220 24 Tabl Tabl e qu qu ip ip pe pe d w i r e e f v a v e o f p rroo pe pe r s iz iz e a n c ap ap ac ac i a s w e l a s v a u u b re re ak ak e co wa o u b e n t o du du ce ce d n t h e h o tank. Flas Flas tank tank imen imensi si ns Disengaging pr (fts) (fe) Horizontal tank -12 12 33 39 Vertical tank 2,3 2,1 2,3 he nt o w p re re s u r s t a m d em em an a n d If h e p ea ea k p rroo du du c o n me mi mu me ha he o nd nd en en s o r mo ph mu be provid provided. ed. F iinn a y , h e a r s ev ev er er a f ea ea tu tu rree s h a s ho ho u b e n c u de de d eeve very ry flas flas h tank tank insta install llat ation ion wh Ad v en en t n g h e e ce ce iv iv e a n c oo oo l n g h e c on on de de ns ns a provided. mp m us u s t b e m ad ad e mu u r g au au g h ou ou l P ro ro p s uriz urized ed tank. tank. p ro ro v d e p s h ou ou l nk p ro ro v pr Ea nd ns br nc he ou be e qu qu ip ip pe pe d w i c h c k v a v e a vo vo i b ac ac k o w T h s te te a p ip ip ng ma so ne ch ck va ve c on on n c t p r s ssuu r e d equipment. Th v en en t g as as e h a m a y a cc cc um um u la la t wi nd mo no d ur ur in in g o pe pe ra ra t o n mo nd ns bl Conclusions wi mo mp nc pl Th or he ni a pp pp l m an a n y c on on de de n a t h an an d n g s i u a o n mo yn mi c os os t n d e as as y equipment. B y m u a ne ne ou ou s g en en e a t n g as ea a n c oo oo l n g h e by du oa on he oi nd wi nd ns r an an s e r b y u s o f r ea ea d a va va i a b p um um p in in g e qu qu ip ip m en en t As ne gy os nc nk dd s te te a a n c on on de de ns ns a s ys ys te te m w i b ec ec om om e n cr cr ea ea s n g p op op u a r Th ar cl wa of ed h e h op op e h a wi se ve he ms w a r a n e i h e w r e n o r m p l e d g iv iv e o r h e f i n es es s o r b ilil itit y o f t he he s i de de as as . b u d in in g de nd gu n s h ou ou l checked to n s ha n fo fo rm rm a o n g r wi he an g u a t o ns ns . o c o nd nd i o n e g d in in g a tm tm o p h o th th e o nd nd i o n h ou ou l b e h e k e n su su r us bi u ssaa ul de an of References Handbook-Systems. I. A tltl an an ta ta , G eo e o rg rg ia ia . A tltl an an ta ta , G eo e o rg rg ia ia . Handbook-Fundamentals. Ma R e tu tu r TE 8. Ma 3, i p e S iz iz in in g C h ar ar /s /s o 8 . Basic Steam P ip Mo Gr Hig Sys ems Ch T e m pe pe ra ra tu tu r Condensate Illinois. D e s g n M a nu nu a jor H e a ti ti ng ng , V e n titi lo lo titi en en , P lu l u mb m b in in g a n Air Condi Conditio tionin nin Systems. 4 t Ar Vi T ec ec hn hn ic ic a S ta ta nd nd ar ar d P ub u b l c at at io io ns ns .