N? /=/=/1/1/1/"=/1/1/> /1 / ! /D /B /B////// Z(Z'=%J J     AUTOCHART GRAPHART@Z P3ART2 G9ART G:ART G?ART G9ART C G:ART C G?ART C GSART G[ART  CBCOPYT GC0PYT  RN0PYTAUTOCHART!  ? @VLBLBq+q+q+CHART 1bq+q+q+ Actual Formula  X-Axis  Y-Axis Temperature vs. PressureCHART 2bq+q+q+@@600 HP Boiler (Modulating)200 HP Boiler (Modulating) Outdoor air temperature  Efficiency CYCLING EFFICIENCY ANALYSIS%Compares existing 600 HP boiler toProposed 200 HP replacement Arial Arial! Arial" Arial# Arial$ Arial% Arial& Arial' Impact( Arial)  !""!!##! '! " #("2NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefined"2 NormalUndefined"2 NormalUndefined"2 NormalUndefined"2 NormalUndefined"2 NormalUndefined"2NormalUndefined"2NormalUndefined"2NormalUndefinedq0*q0*h(.>n q11* 3*&1*DD 3*&(4*%&&&&&&&&%%%$%&&&h5*q0*@?,و(~Dh/>t A!P1* 3*&1*DD 3*&(4*%&&&&&&&&%%%$%&&&h5*@@@@@ @ @@)@@@@@@)@@@@$@@@-@@@@@0@@@@@@@4@@@@@@@@- @@@@@@$ @@@@@- @@@@@- @@@@( @@@@@-@@@@@@$@@@@#@@@@@3@@@@@@@8@@@@@@@@@3@@@@@@@=@@@@@@@5@@@@@9@@@@@5@@@@@:@@@@@:@@@@@@@@@@@@@@@# @@@# @@@,@@@@,@@@@@ ! ``````` ` ` ` ` ``````````````````` `!`'"@@@@@#!$#,%@@@@@@&$'&,(@@€@@@@")@@@@@*)+*,+-,'.@@@@@/-'0@@@@@1/2"03@@@@)4@@@-5@@@)6@@@76)8@@@@ 9@@@:9;7<;=<&>@@ ?@@@@?A@ @@"`#`$`%`&`'`(`)`*`+`,`-`.`/`0`1`2`3`4`5`6`7`8`9`:`;`<`=`>`?`@`A`B@ @CADCE@ @FEGFHGI@ @J@KJLKMLNMDB`C`D`E`F`G`H`I` ~'!'CYCLING EFFICIENCY ANALYSIS 2f܎@7 'Run Macro "Autochart" to'{SELECT L7}?'500,000 square foot major office building, Washington, DC! 'create graph from new data.'/REM7..N74~ '/C~I8~ 'Data^Existing^Proposed 'Data^Existing ^Proposed('{IF I8="End"}{PUT I8;0;0;44}{QUIT}'Manufacturer:  ^Kewanee ^Kewanee'Manufacturer:  D Kewanee VD  Kewanee H&, @0 G @0'{SELECT M5} "Model:  ^600 HP ^200 HP< D 600 HP '=  200 HP \- \-'/RV{R}~{END}{D 2}~'Capacity (Btuh)'Analysis for: x G~?@ d tLȈ@'{END}{D 2}{L} "Max:<@S'Ouside air @X @ v &BL@ wӺa3@'{BRANCH U3} "Min::@X@'1"Load (Btu) =<NN -@< NN -@  t 3|}I9@ q@0 &gսf@0 Re@    r ]R4[@ /_Y\@ "Boiler dry weight:  @ 0\ 'PURGING LOSSES (Btu) p )C;6@ ;abg@ "Gals. water:  D  '2 'Prepurge (sec.)   n ւ@ "3@ "Equiv. Mass: $  @'h   $ p= ף @'h    '3 'Postpurge (sec.) < < l ~b#@ *3Ζ@ "Prepurge loss:: ৰu @ !  : E#+,= @ !    '6 j L-@ OگB@'Burner inputȸ@h'Postpurge loss::\hnI& @   :  @     '7 h N y@ k@"Efficiency:H^wAK?6iZ?'4 f wN8@ !rϚ@'OFF CYCLE LOSSES (Btu) d ^12c'@ 7J@'Peak load (Btuh)@@'Mean temp.:*ffffff&@`* ffffff&@` b i@ wCڴ@'Base load (Btuh) @ 'Draft:Bgm̃s?j,am?$$B gm̃s?j,am?$ $  ` zvrJˎ@ =@ "Press "Temp 'Formula'Design OA Temp'Off cycle flow:(_[{@( $ȤȖ@  '8 ^ o@ -32@'Cycle on press.'Off cycle loss:%G<@ % N @    '9 \ d1)@ 'jx'd@|?5^@(\@\m2@D? e刉?'Cycle off press. Z Ҙցi@  }{ސ@|?5^@Q@z):@St$s`Ad{'RADIATION LOSSES (Btu) X H&, @ G @|?5^@Q@F_@L{/L"]PJ'Combustion air:!gv @"$j-?!M#Ed @"$j-?'No. of walls V ΑLG@ >s_ޝ@v/݄@q= ףp}@a+e@t 2'Blower DP'1'Water cooled:  T ^sf|5Ҕ@ @v/ݔ@Q@-1f@HPsd'Air Cooled:  R %r@ ,갶tc @v/ݤ@Q@\m@~bٽ:e;{r"Stack Height:@ "Loss:[JH}@ k u ;[ Uw@   k u ; '10 P ?ai@ a r=@v/ݴ@@@z):@ qh"  N *['@ vk5aX@v/@)\(\@F_L@0~k JWu\%s'CYCLE DESCRIPTION L (S Uܗ@ hq@v/@(\h@a+e@t?#'Prepurge, load and radiation cooling . . . . . . . . . .G#R@     ;G#'=       ;# # 'Degrees# ># )!@# I}@I$' Burner ignites with water at . . . . . . . . . . . . . . . . .,$5VH@ !#;,$'= !#;$$ 'Degrees F$ <$ (Y!@$ ;@M%'Burner operates for . . . . . . . . . . . . . . . . . . . . . . . . . .P%o?@ x$  Always ;P%'=  x$  Always ; %Always  % 'Minutes% :% ˡ.@% J@K&'Cycle repeats every . . . . . . . . . . . . . . . . . . . . . . . . .?&:Ş@   x"%;?&9'=   x"%;& & 'Minutes& 8& &I῁@& qj|#@' 6' "/W,@' X1fҭ0@('ENERGY USE PER CYCLE( 4( p,Q@( Ӝ<@<)'To satisfy actual heating load . . . . . . . . . . . .)\ .)\ .)\ .E)`|#Y@ &x;;E)NN -@   &x ;;) 'Btu/cycle) 2) z=$@) H`"!H@**'Post purge cooling . . . . . . . . .*\ .*\ .*\ .*\ .%*\hnI& @ ;%*'=  ;** 'Btu/cycle* 0* :@* ؔS@-+'Off cycle cooling . . . . . . . . . . .+\ .+\ .+\ .+\ . +`nVR @"x + "x+ 'Btu/cycle+ .+ qF*@+ >P$^@+,'Prepurge cooling . . . . . . . . . . ,\ .,\ .,\ .,\ .%,ৰu @  ;%,9'=  ;,, 'Btu/cycle, ,,  t@, B`R9h@;-'Radiation loss during off cycle . . . . . . . . . . .-\ .-\ .-\ .(-*NF= @&%x(- &%x- 'Btu/cycle- *- 0@-  ™q@'.'Heat losses while firing . . . . .\ ..\ ..\ ..\ ..1>:Y@ %x;;.!@    %x    ;;. 'Btu/cycle. (. ڃL@. $T{@ /' Cycle input:/bɦ@).P/IHBh@).P/ 'Btu/cycle/ &/ 紴F񈵡@/ [@@ꃟ@0'Cycle efficiency0\ .0\ .0\ .0\ .0\ .-0Vya\:?)/ ;-0[K? )/ ;0 $0 0?f@0 mNa@1'Heat input . . . . .1\ .1\ .1\ .1\ .1\ .V1[B@]ط@ 0x&/;Overloaded;V1IHBh@   0x&/;Overloaded; 1 'Btuh1 "1 cXc@1 V)o@2 2 ,ʢ@2 TM@3"1 ,3'Low fire assumed to be 25% of capacity3 3 9 7ߢ@3 +̣@4"2 &4'With water at normal water line.4 4 ۍí@4 &!@5"3 !5'Equivalent weight in water.5 5 cPp@5 Y@O{k@6"4 +6'Based on boiler input / output rating6 6 ҁ@6 AJ@7"5 *7'Approximate temperature derived from7 7 Ba(@7 'LK@.8'pressure using a simple formula +/-0.2%.8 8 89@8  'Hş@9"6 +9'Cooling from cycle on pressure - Btuh9 9 I@9 ˕G˟@:"7 ,:'Cooling from cycle off pressure - Btuh: : NmYY@:  џ@;"8 2;'Off cycle air flow produced by natural draft; ; =rh@; mU9֟@<"9 +<'Heat loss in off cycle air flow, Btuh< < ďww@< N%ܟ@ ="10 '='Formula derived from ASME PTC 4.1/='105 Haverhill Road - Joppa, MD 21085-4733= = p@= 'ˡN@>' 410-679-6419> > 5rq@> 7N[?_@? ? + @? .S|F@@ @ h読@@ Pa@A A h読@A Pa@B B pI/@B :Hآ@C  D 'End-W_ ArialArialArialTimes New RomanTimes New RomanTimes New RomanTimes New RomanSymbol    O >4!*}@@R3 |(yk1hddDF|2b"DF|2bh@A(F ,"System--n.-   1kn.-n.-h$k11k(n.- ArialY--,2 k1KEH Energy Engineering  ----~~~~:P3 cMIyhCHART 1CHART 1ddDF|2b"DF|2bh@A(3 QXy|hCHART 2CHART 2ddDF|2b"DF|2bh@A(@X ~W\Analysis of cycling losses for different size steam boilers. (c) KEH Energy Engineering 1998 Sue and Ken HeseltonKenneth E. Heselton ) ܎ #* 3Doc Info AuthorDoc Info CommentsDoc Info Creation DateDoc Info Editing TimeDoc Info Last Revision DateDoc Info Last RevisorDoc Info ObjectDoc Info PropertyDoc Info Revisions CountFM3FM3 PropertyWK3WK3 Property  UP MU UMYU U  _T` T T T T UUUU (U U U :U gUQUUCMHdrUP