>3 /=/=/1/1/ 1/"=/1/1/> /1 /  /  / // Z(Z'=%J J       AUTOCHART P3HART1 G9HART  G:HART  G?HART  GFHART GGHART G[HART  CBCOPYT  GC0PYT  RN0PYTAUTOCHART!  ? @VLBLBq+q+q+CHART 1bq+q+q+@@ Outdoor air temperature  Efficiency CYCLING EFFICIENCY ANALYSIS( 14,000 sq.ft. four story office bldg. Arial Arial! Arial" Arial# Arial$ Impact' Arial( Arial) Arial   !""!!##! $! 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'create graph from new data.'{SELECT L7} '/C~I8~ 'Data^Existing^Proposed 'Data^Existing ^Proposed('{IF I8="End"}{PUT I8;0;0;44}{QUIT}'Manufacturer: ^H.B.Smith^Weil McLain'Manufacturer: &'= H.B.Smith 2'=  Weil McLain ͈4@0 [xxPOu@0'{SELECT M5} "Model: @ @ ^ ^'/RV{R}~{END}{D 2}~'Capacity (Btuh)'Analysis for: x @[&@ L=z@'{END}{D 2}{L} "Max:@2'Ouside air @X @ t U,@ j@'{BRANCH P3} "Min:a 2"Load (Btuh) =<;;@ ;;@ p ͋Zp@ y\fG6j@0 3 3Ձ@0 L3 @    l M'9@ |@ "Weight:     'PURGING LOSSES (Btu) h * g`@ Vן@ "Gals. water:  6 b  'Prepurge (sec.)   d L@ t y@ "Equiv. Mass: $  @'h   $ zGj@'h     'Postpurge (sec.) < < ` )rl@ E.)@ "Prepurge loss:: 4Xޜu@ !  : L&@ !    '6 \ dwDԋ@ c ?eHI? T aC7$w@ 'Q@T@'OFF CYCLE LOSSES (Btuh) P :8ܬ@ Wĥ@'Peak load (MBtuh)Cԭ@'Mean temp.:!@! @ L EX@ g}M@'Base load (Btuh) 'Draft:BrƘ׭?j,am?$$B K?j,am?$ $  H mBp@ HT񫈑I@'Design OA Temp'Off cycle flow:(^Uk@( mJ@@  '8 D / ټ@ Xaə@'Cycle on temp.h 'Off cycle loss:('ݱ=6 @ ( s1VS@     '9 @ ~t׽@ !`;@'Cycle off temp.@ < Aax@ wEڡ@'RADIATION LOSSES (Btuh) 8 wG .@ Y¤@'Combustion air:!qǛ@"$j-?!/L F%@"$j-?'No. of walls 4 8tQA@ 3S@'Blower DP"Water cooled:  0 D|w@ s:eӷ@"Air Cooled:  , 왒'@ ֗6)@"Stack Height:@ "Loss:]-q; @  K% u ;] <& @   K % u ; '10 ( KgF@ +mV*@ $ DKP@ Ђg@'CYCLE DESCRIPTION  #r8ߺF@ "w@A'Burner cycles off after heating up to . . . . . . . . . . .@@ 'Degrees F  6j.y,@ -Хhvל@='Postpurge, load and radiation cooling . . . . . . . . .GO*Ex ?    ;GyS.?       ;  'Degrees  i&@ v&)O @E'Burner idle after post purge at . . . . . . . . . . . . . . . .,jCy@ ;, u>X@ ; 'Degrees F  /J{@ c[:@- 'Boiler cooled by load and radiation and 'End@!' off cycle losses to cycle on temp of . . . . . . . .!@!@! 'Degrees F "' within . . . . . . ."\ ."\ ."\ ."\ ."\ .O"n"5[@ x !;O"lL~@ x !   ; " 'Minutes>#'Prepurge, load and radiation cooling . . . . . . . . . .G#&8c?     ;G#D@       ; # 'DegreesI$' Burner ignites with water at . . . . . . . . . . . . . . . . .,$Ų19@ !#;,$9G8@ !#;$ 'Degrees FM%'Burner operates for . . . . . . . . . . . . . . . . . . . . . . . . . .P%yH;@ x$  Always ;P%$و(@ x$  Always ; % 'MinutesK&'Cycle repeats every . . . . . . . . . . . . . . . . . . . . . . . . .?&8,B@   x"%;?&G`4@   x"%; & 'Minutes('ENERGY USE PER CYCLE<)'To satisfy actual heating load . . . . . . . . . . . .)\ .)\ .)\ .E)U;<5@ &x;;E)D.е @   &x ;;) 'Btu/cycle**'Post purge cooling . . . . . . . . .*\ .*\ .*\ .*\ .%*ADӆ@ ;%*Kw@  ;* 'Btu/cycle-+'Off cycle cooling . . . . . . . . . . .+\ .+\ .+\ .+\ . +蟏 @"x +]A@ "x+ 'Btu/cycle+,'Prepurge cooling . . . . . . . . . . ,\ .,\ .,\ .,\ .%,4Xޜu@  ;%,L&@  ;, 'Btu/cycle;-'Radiation loss during off cycle . . . . . . . . . . .-\ .-\ .-\ .(-p{ @&%x(-Ϥ @ &%x- 'Btu/cycle'.'Heat losses while firing . . . . .\ ..\ ..\ ..\ ..`v# @ %x;;.F>S @    %x    ;;. 'Btu/cycle/' Cycle input:/_,^b@).P/as?5<ۊ@).P/ 'Btu/cycle0'Cycle efficiency0\ .0\ .0\ .0\ .0\ .-0oD"6Ɋ?)/ ;-0V{[(? )/ ;1'Heat input . . . . .1\ .1\ .1\ .1\ .1\ .V1 -@ 0x&/;Overloaded;V1HM@   0x&/;Overloaded; 1 'Btuh3"2 3'With boiler flooded.4"3 !4'Equivalent weight in water.5"4 ;5'Estimated heating load including credit for lighting,-6'equipment and people; no safety factor.7"5 ;7'Proposed boiler is equipped with setpoint temperature68'controller, temperatures are a function of load.9"6 .9'Cooling from cycle on temperature - Btuh:"7 /:'Cooling from cycle off temperature - Btuh2;'Off cycle air flow produced by natural draft<"8 +<'Heat loss in off cycle air flow, Btuh="9 '='Formula derived from ASME PTC 4.1/='105 Haverhill Road - Joppa, MD 21085-4733>' 410-679-6419-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 2(yhCHART 1CHART 1ddDF|2b"DF|2bh@A(A X qW`Analysis of cycling losses for different size hot water boilers. (c) KEh Energy Engineering 1997 Sue and Ken HeseltonKenneth E. Heselton ) ܎ " /Doc 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  ?P 28? ?28/? ?  a>d > > > ????? .? ? ? @? m?W??CMHdr?P