139771418 Expansion Tank Sizing Calculation Hydronic System

7/24/2019 139771418 Expansion Tank Sizing Calculation Hydronic System

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Expansion Tank EasyCalc

HYDRONIC SYSTEM EXPANSION TANK CALCULATION(c) 2000 ASHRAE Handbook, HVAC Systems & Equipment, Hydonic Heatin! & Coo"in! System #esi!n, C$ap%12

Equations for Sizing E!ansion Tan"s#

o #ate 'ep% 21201*

Equation (12)

(Sometimes called a plain steel tank)

Open Tanks with air/water interface: (ie! " tank open to t#e atmosp#ere $ must %e Equation (1&)

located a%o'e t#e #i#est point in t#e system)

For Diaphragm Tanks: (lexi%le mem%rane %etween t#e air $ t#e water Equation (1*)

"not#er confiuration is t#e %ladder tank)

RE$UIRED DATA %OR CALC Data Entr& E!ansion Tan" Ca'(u'ation

+#ere, Site "ltitude-Ele'ation (m). 0 C"osed +pen #iap$a!m

/ - emp .2 H 1//

/ o"ume o ate in system, !a""ons -000 -000 -000 -000

/ "oe tempeatue, 34 /0 /0 /0 /0

/ $i!$e tempeatue, 34 220 220 220 220

/ atm%pes%psia (1/%** psia at sea "ee") 1/%** 1/%** not eqd% not eqd%

/ pessue at "oe tempeatue, psia /%0 /%0 not eqd% /%0/ pessue at $i!$e tempeatue, psia -%5 -%5 not eqd% -%5

/ 0%01*02 0%01*02 0%01*02 0%01*02

/ 0%01*55 0%01*55 0%01*55 0%01*55

/ 160 160 160 160

/ "i t$ " i i i 34 * 90E 0* * 90E 0* * 90E 0* * 90E 0*

B+#A =#B;, En!ineein! #esi!n ?anc$, #ee"oped by Ed!a D%


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=and .ota" Vo"ume o ;ate in System11-9* -000


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+t$e consideations ae to ensue t$at (1) t$e pes% at no point in t$e system i"" ee dop be"o t$e satuation pes% at t$e

opeatin! system temp% and (2) a"" pumps $ae suicient net positie suction $ead (I'SH) aai"ab"e to peent caitations%

Enab"e#isab"e notes on pa!e 2 abo yesEa/!'- Ca'(u'ation of E!ansion Tan"s %ro/ +888 ASHRAE Han03oo"9 H.AC S&st-/s : Equi!/-nt9 C7a!6 *+

.$e minimum pessue at t$e tank is 10 psi! (2/%5 psia) & t$e ma7imum pessue is 29 psi! (-%5 psia)% (Atmosp$eic pessue

is 1/%5 psia%) .$e o"ume o ate is -000 !a"% .$e pipin! is stee"%

1 Calculate t#e required sie for a closed tank (plain steel tank) wit# an airwater interface

4om .ab"e - in C$ap% * o t$e ASHRAE HandbookM4undamenta"s,

;ises Enty

E7amp"e 2 #ata 'a!e1

/ -000 -000

/ /0 /0

/ 220 220 ASHRAE #ata in 4omu"a as pe E7amp"e no%1)

/ 1/%5 1/%**

/ 2/%5 /%0

/ -%5 -%5

/ 0%01*02 0%01*02

/ 0%01*55 0%01*55

/ 160 160 Ans4-rs# Vo"ume o #iap$a!m E7pansion .ank

/ *%90E80* *%90E80* =>? =a""ons (ASHRAE #ata as pe E7amp"e no%1)

/ =>? @ @ =a""ons ( >seNs Enties ca"cu"ation at pa!e 1)

;ises Enty

E7amp"e 2 #ata 'a!e1

-000 -000

Ea/!'- *6SiJe an e7pansion tank o a $eatin! ate system t$at i"" be opeated at a desi!n tempeatue an!e o 160 to 22034%

#ol$tion:or lower temperature t1! use *0

1at /034 O 0%01*02 t-"b

2at 22034 O 0%01*55 t-"b

Vs So"ution 3sin Equation (12),

t1

t

!a

!*!

+

"*

"+

Vt

Vt

Vt

Ea/!'- +6D a diap$a!m tank ee to be used in "ieu o t$e p"ain stee" tank, $at tank siJe ou"d be equiedP

So"ution 3sin Equation (1*),


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o 100 eet% .$e tota" pessue equied in t$e e7pansion tank is

/ psi Q (100 t 10 t)2%-1 O /2%* psi

.$us an e7pansion tank it$ a pe8c$a!ed pes% at /0 psi om actoy i"" equie an additiona" - psi pessu

oi'-r S&st-/ T&!-s#

1%


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a% 1*0 psi &"ess

b% 29034% &"ess

Hot ,at-r oi'-rs St-a/ oi'-rs C7i''-rs

A% ?oi"e .ypes A% ?oi"e .ypes A% C$i""e .ypes

1% 4ie .ube ?oi"es 1% 4ie .ube ?oi"es 1% Centiu!a"

a 145800 67 a 145800 67 a% 200 .ons &


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2% Coo"in! T. Ran!e 102034% 2% T. Ran!e 102034%

-%


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* 000 /5%161 *%6/-

5 000 /1%0*1 9%99

6 000 -9%* 9%1*-

000 -0%5/2 /%/9

10 000 2*%/-* -%6-/

(c) 2009 ASHRAE Handbook, 4undamenta"s, C$apte *


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ASHRAE 4undamenta"s

.ab"e - .$emodynamic 'opeties o ;ate at Satuation

.emp%, Speciic Vo"% .emp%, Speciic Vo"% .emp%, Speciic Vo"% .emp%, Speciic Vo"% .emp%, Speciic Vo"%

34 34 34 34 34-2 0%015/5 *0 0%01*0/ 66 0%01*0 11* 0%01*1 1// 0%01*-1

-- 0%01*02 *1 0%01*0/ 6 0%01*1 115 0%01*1 1/9 0%01*-2

-/ 0%01*02 *2 0%01*0/ 0 0%01*1 116 0%01*2 1/* 0%01*-2

-9 0%01*02 *- 0%01*0/ 1 0%01*1 11 0%01*2 1/5 0%01*--

-* 0%01*02 */ 0%01*0/ 2 0%01*11 120 0%01*2 1/6 0%01*--

-5 0%01*02 *9 0%01*0/ - 0%01*11 121 0%01*21 1/ 0%01*-/

-6 0%01*02 ** 0%01*0/ / 0%01*11 122 0%01*21 190 0%01*-/

- 0%01*02 *5 0%01*09 9 0%01*12 12- 0%01*22 191 0%01*-9

/0 0%01*02 *6 0%01*09 * 0%01*12 12/ 0%01*22 192 0%01*-9/1 0%01*02 * 0%01*09 5 0%01*12 129 0%01*2- 19- 0%01*-*

/2 0%01*02 50 0%01*09 6 0%01*12 12* 0%01*2- 19/ 0%01*-*

/- 0%01*02 51 0%01*09 0%01*1- 125 0%01*2- 199 0%01*-5

// 0%01*02 52 0%01*0* 100 0%01*1- 126 0%01*2/ 19* 0%01*-5

/9 0%01*02 5- 0%01*0* 101 0%01*1- 12 0%01*2/ 195 0%01*-6

/* 0%01*02 5/ 0%01*0* 102 0%01*1/ 1-0 0%01*29 196 0%01*-6

/5 0%01*02 59 0%01*0* 10- 0%01*1/ 1-1 0%01*29 19 0%01*-

/6 0%01*02 5* 0%01*0* 10/ 0%01*1/ 1-2 0%01*2* 1*0 0%01*-

/ 0%01*02 55 0%01*05 109 0%01*19 1-- 0%01*2* 1*1 0%01*/

90 0%01*02 56 0%01*05 10* 0%01*19 1-/ 0%01*25 1*2 0%01*/

91 0%01*02 5 0%01*05 105 0%01*1* 1-9 0%01*25 1*- 0%01*/1

92 0%01*0- 60 0%01*05 106 0%01*1* 1-* 0%01*25 1*/ 0%01*/2

9- 0%01*0- 61 0%01*06 10 0%01*1* 1-5 0%01*26 1*9 0%01*/2

9/ 0%01*0- 62 0%01*06 110 0%01*15 1-6 0%01*26 1** 0%01*/-

99 0%01*0- 6- 0%01*06 111 0%01*15 1- 0%01*2 1*5 0%01*/-

9* 0%01*0- 6/ 0%01*06 112 0%01*15 1/0 0%01*2 1*6 0%01*//

95 0%01*0- 69 0%01*0 11- 0%01*16 1/1 0%01*- 1* 0%01*//

96 0%01*0- 6* 0%01*0 11/ 0%01*16 1/2 0%01*- 150 0%01*/9

t-

"b t-

"b t-

"b t-

"b t-

"b


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9 0%01*0- 65 0%01*0 119 0%01*1 1/- 0%01*-1 151 0%01*/*

152 0%01*/* 20* 0%01**5 250 0%01515 --6 0%01569 /19 0%0166*

15- 0%01*/5 205 0%01**6 252 0%0151 -/0 0%01565 /20 0%016/

15/ 0%01*/5 206 0%01** 25/ 0%01521 -/2 0%0156 /29 0%0101

159 0%01*/6 20 0%01** 25* 0%01522 -// 0%0152 /-0 0%010

15* 0%01*/6 210 0%01*5 256 0%0152/ -/* 0%015/ /-9 0%0116155 0%01*/ 212 0%01*51 260 0%0152* -/6 0%015* //0 0%012*

156 0%01*9 21/ 0%01*5- 262 0%01526 -90 0%015 //9 0%01-9

15 0%01*9 21* 0%01*5/ 26/ 0%015-0 -92 0%01601 /90 0%01/-

160 0%01*91 216 0%01*5* 26* 0%015-1 -9/ 0%0160/ /99 0%0192

161 0%01*91 220 0%01*55 266 0%015-- -9* 0%0160* /*0 0%01*1

162 0%01*92 222 0%01*5 20 0%015-9 -96 0%01606 /*9 0%0151

16- 0%01*9- 22/ 0%01*6 22 0%015-5 -*0 0%01611 /50 0%0160

16/ 0%01*9- 22* 0%01*62 2/ 0%015- -*2 0%0161-

169 0%01*9/ 226 0%01*6- 2* 0%015/1 -*/ 0%0161*

16* 0%01*9/ 2-0 0%01*6/ 26 0%015/- -** 0%01616

165 0%01*99 2-2 0%01*6* -00 0%015/9 -*6 0%01621

166 0%01*9* 2-/ 0%01*66 -02 0%015/5 -50 0%0162-

16 0%01*9* 2-* 0%01*6 -0/ 0%015/ -52 0%0162*

10 0%01*95 2-6 0%01*1 -0* 0%01591 -5/ 0%01626

11 0%01*96 2/0 0%01*2 -06 0%0159- -5* 0%016-1

12 0%01*96 2/2 0%01*/ -10 0%01599 -56 0%016-/

1- 0%01*9 2// 0%01*9 -12 0%01595 -60 0%016-*

1/ 0%01*9 2/* 0%01*5 -1/ 0%0159 -62 0%016-

19 0%01** 2/6 0%01*6 -1* 0%015*1 -6/ 0%016/2

1* 0%01**1 290 0%01500 -16 0%015*- -6* 0%016//

15 0%01**1 292 0%01502 -20 0%015*9 -66 0%016/5

16 0%01**2 29/ 0%0150- -22 0%015*5 -0 0%01690

1 0%01**- 29* 0%01509 -2/ 0%01550 -2 0%0169-

200 0%01**- 296 0%01505 -2* 0%01552 -/ 0%01699

201 0%01**/ 2*0 0%01506 -26 0%0155/ -* 0%01696

202 0%01**9 2*2 0%01510 --0 0%0155* -6 0%016*1

20- 0%01**9 2*/ 0%01512 --2 0%01556 /00 0%016*/


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20/ 0%01*** 2** 0%0151/ --/ 0%01560 /09 0%01651

209 0%01**5 2*6 0%01519 --* 0%0156- /10 0%01656

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139771418 Expansion Tank Sizing Calculation Hydronic System