SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns Ta8le 4-1F "tem /oad Com$onent
491
'!m$!nent
Secti!n
0oom Load -an Load Supply 'uct 0!turn Outdoor "ir
4/1 4/2 4/ 4/4 4/5
'!!lin& 'alculati!ns
eatin& 'alculati!ns
,entilati!n 'alculati!ns -
Room /oad
'!m$!nents !# the r!!m l!ad are identi#ied in Secti!n /
492
!an /oad
9an l!ad is the sensile heat added t! the air the #an m!t!r and is n! di##erent #r!m sensile eui$ment l!ads descried in Secti!n /4/ It is e+$ressed in terms !# the air tem$erature rise acr!ss the #an !r heat #l!. (Btuhr/ 9an l!ad shall e included #!r all air c!nditi!nin& sstems and #!r entilati!n sstems serin& s$aces .h!se reuired air #l!.s are ased !n all!.ale tem$erature rise/ 49291 !an ,otor Heat ain ?hen the h!rse$!.er !# the #an m!t!r t! e used is ;n!.n* the #an l!ad is calculated in !ne !# t.! .as* de$endin& !n .hether the #an m!t!r is in !r !utside !# the air stream/
?hen the #an m!t!r is in the air stream* the #an l!ad is calculated usin& Euati!n -* .ith a use #act!r !# 1/0/ ?hen the #an m!t!r is !utside the air stream* the #an l!ad is calculated usin& the euati!n=
s
/ / = +hp × 2545 × -
(4-1
?here the use #act!r shall e 1/0/ 9!r a #an m!t!r !utside the air stream* the di##erence et.een Euati!ns - and 4-1 shall e a$$lied as r!!m eui$ment l!ad/
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns
s
=
T f
5/0 × 2545 × 1/0 0/O 14626
1/0 × 5000
=
14626 Btuhr
°
2/O 9
(Euati!n - (Euati!n 4-2
'ASE 'entri#u&al Su$$l 9an (#an !nl in air stream G 15 " m!t!r* 000 '9M G ,entilati!n a$$licati!n/ +hp 15 " (3ien 6 000 '9M (3ien - 1/04 (Tale - .-. 1/0 (Sec/ 4/2/1 s = 15 × 2545 × 1/0 1O5 Btuhr (Euati!n 4-1 eat #!r e$t l!adX (Sec/ 4/2/1 1O5 T f 4/6 9 (Euati!n 4-2 1/04 × 000 °
'ASE A+ial Su$$l 9an (m!t!r and #an in air stream G m!t!r heat dissi$ati!n= 0 Btuhr* 1600 '9M G ,entilati!n a$$licati!n/ 0 Btuhr 6 1600 '9M - 1/04 0 T f 2/ 9 1/04 × 1600 °
'ASE 40
(Euati!n 4-2
'entri#u&al 9an (m!t!r and #an in air stream G m!t!r characteristics un;n!.n/ °
T f /0 9
49;
(3ien (3ien (Tale -
(Sec/ //1
"u$$l 'uct /oad
Sensile heat is added t! !r e+tracted #r!m the air in a duct .hen the duct $asses thr!u&h s$aces hain& hi&her !r
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns °
(Sec/ 4//1
Fse T r G 1/O 9
494
Return Pat# /oad
Return $ath l!ad is the sensile heat $ic;ed u$ the recirculated air as it $asses thr!u&h $assa&e.as* stair.ells* and the return ductin&/ This l!ad is als! e+$ressed in terms !# air tem$erature rise/ 49491 Return Pat# Heat ain 9!r sstems in .hich the $assa&e.as and stair.ells are directl su$$lied .ith c!nditi!ned air* the return $ath l!ad is estimated usin& the l!n&est run !# return ductin&/ The tem$erature rise shall e calculated usin& the euati!n=
T r
=
L!ngth × 0/5J9 100
(4-4
?here L!ngth is ta;en as that !# the l!n&est return ductin&* in #eet/ 9!r sstems in .hich the $assa&e.as and stair.ells are indirectl su$$lied .ith c!nditi!ned air* the return $ath l!ad ma e assumed t! e 5/0 9 t! sim$li# calculati!ns !r ma e determined a t.! ste$ $r!cess= °
1/
The heat &ain in $assa&e.as and stair.ells ma e determined usin& a heat alance calculati!n !r assumed t! e a /0 9 tem$erature rise/ The heat &ain in the return ducts shall e calculated usin& Euati!n 4-4/ °
2/
All tem$erature rises shall e r!unded !## t! the nearest tenth !# a de&ree/ 49492
"am$le Calculation
'ASE 42
A' Sstem* air c!nditi!ned $assa&e.as and stair.ells G l!n&est run !# return duct 10 #t/
L!ngth 10 T = r
10 × 0/5 100
(3ien °
0/ 9
(Euati!n 4-4
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns 7utd!!r air reuired #!r an air c!nditi!nin& sstem shall e ased !n r!!m !ccu$anc and shall e increased !nl in !rder t! alance e+haust reuirements .ithin each sudiisi!n* ut shall n!t e+ceed 50 '9M $er $ers!n/ 49591 ccu$anc Calculation 7utd!!r air reuirements ased !n !ccu$anc are calculated usin& the euati!n=
6 = O f × (
(4-5
R!!m !ccu$anc shall e determined in the same manner detailed in Secti!n /5/1/ 49592
"am$le Calculation
'ASE 44
Stater!!m G 4 erths/
O f 15 '9M$ers!n ( 4 $e!$le 6 15 4 60 '9M 'ASE 45
Radi! R!!m/
O f 15 '9M$ers!n ( 1 $ers!n 6 15 1 15 '9M 'ASE 46
(Sec/ 2/1//1 (Sec/ /5/1 (Euati!n 4-5
(Sec/ 2/1//1 (Sec/ /5/1 (Euati!n 4-5
7##ice G seats/
O f 15 '9M$ers!n ( 4 6 $e!$le 6 15 6 0 '9M
(Sec/ 2/1//1 (Sec/ /5/1 (Euati!n 4-5
590 "H.PD" A.R BA/A*C In its sim$lest #!rm* shi$s air alance is ta;en as e+haustin& the same am!unt !# air (in '9M #r!m the shi$ t! the
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns Neither $!sitie n!r ne&atie $ressure is desirale since either ma create a sa#et ha)ard .hen !$enin& .eather d!!rs and d!!rs se$aratin& air c!nditi!ned and entilated areas !# the shi$/ It is rec!mmended that $r!isi!ns #!r maintainin& the shi$ at a neutral $ressure .ith re&ards t! the atm!s$here e inc!r$!rated in the ,A' desi&n/
690 HVAC CA/C/AT.* B/T Standard #!rms hae een deel!$ed t! sim$li# and reduce the e##!rt reuired t! $re$are and reie. a set !# ,A' calculati!ns/ Tale 6-1 lists a t$ical set !# #!rms* the secti!ns .hich descrie each #!rm* and .hen it is used/ Ta8le 6-1F HVAC !orm
9!rm $ompartm!nt Euipm!nt List %!ating = $ooling Load $alculations (sychrom!tric $hart $ooling "nalysis %!ating "nalysis Supply Syst!m "nalysis EAhaust Syst!m "nalysis
Secti!n 6/1 6/2 6/ 6/4 6/5 6/6 6/O
'!!lin& Sstems -
eatin& Sstems
,entilati!n Sstems Q
Q "schr!metric 'harts are reuired #!r entilati!n sstems !nl i# $rec!!lin& is used/ The #!rms listed in Tale 6-1 are n!rmall assemled in !!;let #!rm al!n& .ith a title sheet* list !# re#erences* a Tale !# '!ntents* and a list !# areiati!ns and sm!ls/ Sam$le #!rms are $r!ided in the #i&ures at the end !# this secti!n usin& results #r!m s!me !# the e+am$le cases $resented/
691
Com$artment
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns
692
Heatin% and Coolin% /oad Calculation
This #!rm* 9i&ure 6-4* is used t! calculate the r!!m l!ads descried in Secti!n / The necessar in#!rmati!n .hich must a$$ear !n this #!rm is= • • • • • • • •
S$ace name and l!cati!n S$ace heatin& and c!!lin& desi&n tem$erature S$ace and tem$erature adacent t! each !undar :!ad ;e (de#ined el!. B!undar areas Insulati!n t$e eat trans#er c!e##icient* (.ith directi!n !# heat #l!. #!r each !undar c!nditi!n Insulati!n ;e #!r each !undar c!nditi!n* de#ined el!./
The standard l!ad ;e is sh!.n in the l!.er le#t hand c!rner !# 9i&ure 4/ It is a means !# identi#in& in the !d !# the calculati!ns .hat the $hsical relati!n !# the !undar is t! the r!!m and is necessar #!r the $r!$er identi#icati!n !# alues t! e used/ The alues !# are determined #r!m the current editi!n !# the Thermal Insulati!n Re$!rt* SNAME Technical Research Bulletin N!/ 4-O/ These #act!rs are de#ined acc!rdin& t! the insulati!n arran&ement and thic;ness* directi!n !# heat #l!.* and relati!nshi$ et.een the r!!m and adacent s$aces* as t! inside air* !utside air* sea.ater !r s!lar/ The insulati!n ;e is the insulati!n
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns
69;
Pc#rometric C#art
9i&ure 6-O sh!.s a t$ical $schr!metric chart that can e used #!r anal)in& t!tal sstem $er#!rmance and $arameters/ !.eer* an standard $schr!metric chart can e used/ A$$endi+ A c!ntains a sam$le $schr!metric chart/
694
Coolin% Anali
The c!!lin& analsis* 9i&ure 6-* is used t! summari)e the c!!lin& reuirements #!r each air c!nditi!ned s$ace/ 9!r this $ur$!se* s$ace has een $r!ided t! list the c!m$artment and l!cati!n* sensile and latent c!!lin& l!ads* sensile heat #act!r* and reuired !utside air #!r each s$ace sered the sstem/ F$!n c!m$leti!n !# all entries #!r a sstem* t!tal sstem reuirements can e determined/ The c!!lin& analsis sheet can then e used t! summari)e all c!!lin& sstems in a similar manner/ A$$endi+ A c!ntains a sam$le c!!lin& analsis/
695
Heatin% Anali
9i&ure 6- sh!.s the #!rm deel!$ed #!r summari)in& sstem heatin& reuirements/ It is er similar t! the c!!lin& analsis #!rm* ut lists s$ace heatin& l!ads* reuired tem$erature rise* and summari)es heater reuired $er#!rmance/ A$$endi+ A c!ntains a sam$le heatin& analsis/
696
"u$$l "tem Anali
9i&ure 6-10 is used t! list the su$$l sstem analsis #!r entilated s$aces/ The #!rm $r!ides #!r listin& s$ace name* l!cati!n* desi&n tem$eratures (c!!lin& and heatin& seas!ns* c!!lin& and heatin& l!ads* and su$$l '9M/ A$$endi+ A c!ntains a sam$le su$$l sstem analsis/
69
I#aut "tem Anali
9i&ure 6-11 is used t! list the e+haust sstem analsis #!r entilated s$aces reuirin& e+haust/ The #!rm $r!ides #!r listin& s$ace name* l!cati!n* desi&n tem$eratures (c!!lin& and heatin& seas!ns* c!!lin& and heatin& l!ads* and e+haust '9M/ A$$endi+ A c!ntains a sam$le e+haust sstem analsis/
!i%ure 6-1F Com$artment
"PAC *9
.P,*T
,!9 RAT.* :ATT"
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41
SEET N7/
!i%ure 6-2F "am$le !orm CA" 4 "PAC
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!i%ure 6-4F Heatin% & Coolin% /oad Calculation "PAC
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A'LAC*T C,PART,*T
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T O
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! B!undar Area $ S eat :!ad* Sensile $ L eat :!ad* :atent $T eat :!ad* T!tal $% eat :!ad* ?inter
'A:'F:ATE% B8=
H#t2 HBtuhr HBtuhr HBtuhr HBtuhr
"7,B/" # eat Trans#er '!e##icient T S$ace %esi&n Tem$/ T O Tem$erature !# Adacent S$ace 7utside "T Tem$erature %i##erence
HBtu#t2hr 9 H 9 H 9 °
° °
°
H 9
7 1 %ec; 7er 2 %ec; Fnder ; 7ut!ard Bul;head Shell 4 9!r.ard Bul;head 5 A#ter Bul;head
'E'@E% B8= 44
6 In!ard Bul;head :i&hts = Eui$ment > "ers!nnel 10 In#iltrati!n
EATIN3 '77:IN3 :7A% 'A:'F:ATI7NS F:: 7R >7B N7/= RE,/ SEET N7/
79
!i%ure 6-5F "am$le !orm CA" 4> "PAC
"PAC *9
STATER77M
'-11
A'LAC*T C,PART,*T
A' 'ABIN EN3/ ST7RER77M S7:AR S7:AR :AFN%R8 S/R/ T7I:ET 7S"ITA: "ASSA3E?A8
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1 2 4 5 5 6
10 55 6 3:ASS
6 5 5 5
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156 156 0 6 104 40 64 6
O 115 125 105 5 O O
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Z \
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\ \ -
TRANSMISSI7N SFBT7TA: :I3TS EYFI"MENT "ERS7NNE:
O
SENSIB:E EAT SFBT7TA: :ATENT EAT SFBT7TA:
HAT.* "A"*F T J KK O0 KK G! #
$ S
$ L
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T O
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0 65 465 60 O 105 0 0
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*T"F 3:ASS S7:AR :7A% 160 BTFR9T2 6 9T2 60 BTFR ,7:FME 100 9T S9 42O5 4610 0/
! B!undar Area $ S eat :!ad* Sensile $ L eat :!ad* :atent $T eat :!ad* T!tal $% eat :!ad* ?inter
'A:'F:ATE% B8=
H#t2 HBtuhr HBtuhr HBtuhr HBtuhr
"7,B/" # eat Trans#er '!e##icient T S$ace %esi&n Tem$/ T O Tem$erature !# Adacent S$ace 7utside "T Tem$erature %i##erence
HBtu#t2hr 9 H 9 H 9 °
° °
°
H 9
7 1 %ec; 7er 2 %ec; Fnder ; 7ut!ard Bul;head Shell 4 9!r.ard Bul;head 5 A#ter Bul;head
'E'@E% B8= 45
6 In!ard Bul;head :i&hts = Eui$ment > "ers!nnel 10 In#iltrati!n
EATIN3 '77:IN3 :7A% 'A:'F:ATI7NS F:: 7R >7B N7/= RE,/ SEET N7/
79
!i%ure 6-6F "am$le !orm CA" 50 "PAC
"PAC *9
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Z Z \ \ \
TRANSMISSI7N SFBT7TA: :I3TS EYFI"MENT
O
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'A:'F:ATE% B8=
H#t2 HBtuhr HBtuhr HBtuhr HBtuhr
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°
H 9
7 1 %ec; 7er 2 %ec; Fnder ; 7ut!ard Bul;head Shell 4 9!r.ard Bul;head 5 A#ter Bul;head
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EATIN3 '77:IN3 :7A% 'A:'F:ATI7NS F:: 7R >7B N7/= RE,/ SEET N7/
79
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B.B/.RAPH7R!R*C" Technical and Research Bulletin N!/ 4-O* Thermal Insulati!n Re$!rt 201 ASRAE 9undamentals and!!;
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns
APP*'.E A HVAC CA" "T'7 eneral A$$endi+
HVAC Cae "tud The e+am$le c!nsiders t.! air c!nditi!nin& sstem desi&nsL <"F:: TR7F3D AN% <"FS T7F3D/ The use !# each is dictated the desi&nerCs $re#erence and !#ten s$ace aailailit/ In a "F:: TR7F3 sstem* the #an is l!cated d!.nstream !# the c!!lin& c!il/ The #an m!t!r heat increases the tem$erature !# the air leain& the c!il* and as such* the sstem air#l!. has t! e increased t! acc!mm!date the tem$erature rise/ The s;etch el!. is a &ra$hical $resentati!n !# a "F:: TR7F3 sstem/
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns In a "FS TR7F3 sstem* the #an is l!cated u$stream !# the c!!lin& c!il/ The #an m!t!r heat increases the tem$erature !# the air enterin& the c!il/ In this t$e !# sstem* the #an m!t!r heat d!es n!t a##ect the sstem air#l!./ The s;etch el!. is a &ra$hical $resentati!n !# a "F:: TR7F3 sstem/
In !rder t! dem!nstrate the sutle di##erence et.een the t.! t$es !# sstems* the #!ll!.in& items remain the same #!r !th sstems= 1/ 2/ / 4/ 5/ 6/ O/ /
Same s$aces sered '!!lin& and heatin& l!ads !# the s$aces sered are the same #!r !th sstems Reuired re$lenishment air !# 0 '9M is the same #!r !th sstems Same 7##-c!il tem$erature !# 51/550/5 de& 9 (?B%B #!r !th sstems 9an M!t!r eat :!ad tem$erature rise !# /0 de& 9 .as used #!r !th sstems Su$$l %uct :!ad tem$erature rise !# 2/0 de& 9 (Secti!n 4//1 is assumed #!r !th sstems Return "ath :!ad tem$erature !# 5/0 de& 9 (Secti!n 4/4/1 is assumed #!r !th sstems Re$lenishment air is assumed t! e $reheated t! 42 de& 9 in the heatin& seas!n/
9!r "F:: TR7F3 sstem= See Sheet N!/ 1 #!r '!!lin& Analsis
SNAME Technical and Research Bulletin 4-16 (2015 Interim Rec!mmended "ractices #!r Merchant Shi$ HVAC %esi&n 'alculati!ns Ta8le A-1F "tem 'ei%n Com$arion
ITEM Re$lenishment air Re$lenishment air tem$ de& 9 7##-c!il tem$ %B?B T!tal s$aces sensile heat rati! Su$$l duct l!ad Sstem relatie humidit 9an m!t!r heat l!ad T!tal s$aces sensile l!ads Tem$ !# air su$$l t! s$aces Sstem air#l!. Return $ath l!ad Mi+ air tem$ (%B?B de& 9 '!il enterin& (%B?B de& 9 Air c!nditi!nin& l!ad ?inter mi+ T!tal reuired heatin&
"F:: TR7F3 0 '9M /0 (5U #!r su$$l #an rise 51/550/5 0/2 2/0 de& 9 42/2P /0 de& 9 d!.nstream !# c!il 2416 BTFR 56/5 de& 9 (51/5U2U/0 4000 '9M 5/0 de& 9 6/O6/5 6/O6/5 1/5 t!ns 6/1 de& 9 / ;?
"FS TR7F3 0 '9M /0 (5U #!r su$$l #an rise 51/550/5 0/2 2/0 de& 9 42/P /0 de& 9 u$stream !# c!il 2416 BTFR 5/5 de& 9 (51/5U2 500 '9M 5/0 de& 9 O/2O0/4 0/2O1/ 1/0 t!ns 62/1 de& 9 / ;?
The di##erence in the air c!nditi!nin& l!ads is attriuted t! the su$$l duct and the return $ath l!ads/ Because !# the di##erence in air#l!.s et.een the t.! sstems* it is e+$ected that these l!ads .ill e di##erent and as a result* there .ill e a small di##erence in the air c!nditi!nin& l!ads/
5O
"7"T, *9
'C C/A""
C./ ".M
P"H THRH
C./ *TR.* A.R T,P >092
C./ *9F A.R".' NPF
T7
!A* ".MF
IN/ ?3
"PAC *A, Radi! R!!m
19;
C./ /AV.* A.R T,P
J9 %B J9 ?B
5195
!A* TTA/ PR""9F
5095
C./ !/:
J9 %B J9 ?B
3"M
TTA/ C./ /A'
T7NS
1>90
IN/ ?3
TTA/ A.RF
;500
'9M
,.E T,PF
=92
J9 %B
!A* ,TR HPF
"
!A* A.RF
;500
'9M
RP/ A.RF
>>0
'9M
RP/ T,PF
>=
J9 %B
!A* ,TR HATF
BTFR
!A* B7PA"" A.RF
**
'9M
RTR* A.RF
2510
'9M
RTR* T,PF
=;
J9 %B
C!,BT
"PAC RD' A.R (C!,)
'".* A.R (C!,)
0/0OO 0/0OO
1 100
20 100
0/0OO 0/0OO
104 125
100 125
"PAC *9
"PAC C/.* /A' (BTHR) "*".B/ /AT*T TTA/
RHAT (7*) N
425
5
O60
"H! 0/6
Ins$ect!rCs Stater!!m Assistant 'hie# En&r Stater!!m
26 2O6
5 5
2O4 0O1
0/ 0/
N N
'hie# En&ineer Stater!!m %ec; 7##icer Stater!!m MasterCs 7##ice
0 22O 12O
5 5 1005
6 2622 412
0/1 0/O 0/O6
N N N
MasterCs Stater!!m Assistant Master Stater!!m
0 24
5 5
6 26
0/1 0/
7##icer Stater!!m (1
2420
5
2O55
7##icer Stater!!m (2 7##icers Mess
2605 411
5 210
240 60
're. Mess
O45
5120
1065
:!un&e
4O00
140
6040
0/O
N
En&ine %e$artment Stater!!m (1
2OO
6O0
45O
0/1
N
En&ine %e$artment Stater!!m (2 %ec; %e$artment Stater!!m (1 %ec; %e$artment Stater!!m (2
25 214 406
6O0 6O0 6O0
655 54 4O6
0/2 0/1 0/O
N N N
%ec; %e$artment Stater!!m ( %ec; %e$artment Stater!!m (4
2O60 2O60
6O0 6O0
40 40
0/0 0/0
N N
0/0OO
O
5
0/0OO
11
120
N N
0/0OO 0/0OO
125
125 0
0/
N
0/ 0/65
N N
0/0OO 0/0OO
2
0 100
0/61
N
0/0OO 0/0OO
156 01
155 00
0/0OO 0/0OO
1O 106
10 110
0/0OO 0/0OO
11 110
110 110
0/0OO 0/0OO 0/0OO
16 105 105
160 105 105
%ec; %e$artment Stater!!m (5
406
6O0
4O06
0/6
N
Ste.ard %e$artment Stater!!m (1 Ste.ard %e$artment Stater!!m (2
2414 26
6O0 6O0
04 0
0/O 0/0
N N
0/0OO 0/0OO 0/0OO
15 1 100
150 0 100
Ste.ard %e$artment Stater!!m (
2OO
6O0
45O
0/1
N
0/0OO
106
110
!s$ital Machiner '!ntr!l R!!m
2 6
6O0 5
05 1001
0/O 0/O
N N
0/0OO
0
0
0/0OO
6O
O0
>2416
20;5
112>1
09=2
;500
;500
Total
N7TES= 1/ Su$$l air tem$ 51/5 U 2 de& su$$l duct rise 5/5 de& 9 2/ Sstem air#l!. t!tal sensile l!ad (1/0 + (O G 5/5 / '9MBTF sstem air#l!. t!tal sensile l!ad
F:: 7R >7B N7/=
'A:'F:ATE% B8=
RE,/
'77:IN3 ANA:8SIS
'E'@E% B8=
5
SEET N7/
4
60
