803 rac (me-803) exp. manual
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LAB MANUAL
REFRIGERATION & AIR-CONDITIONING
Estd. 2004
Prepared by
(Department of Mechanca! En"neern"#
LAKSHMI NARAiN COLLEGE OF TECHNOLOGY
Bhawrasala, Sanwer Road, Rewati Range, 453 331 Indore
$A%'MI NARAIN CO$$EGE OF TEC'NO$OG)
INDORE
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DEPARMEN !" ME#$ANI#AL EN%INEERIN%
$IT OF E*PERIMENT
Name of the $ab+ , Refr"eraton & Ar-condtonn" (ME-./#
+NO+ DECRIPTION
1 St&d' the (a)o&r #o*)ression S'ste*+ St&d' the Ele-trol&. Re/rigeration+3 %eneral St&d' o/ a 0ater #ooler+4 "laring and Swaging o/ a #o))er &e+5 %eneral St&d' o/ a Lea2 Dete-tor $alide or-h+ %eneral St&d' o/ a 0indow ')e Air6#onditioner+7 St&d' o/ a Dee) "ree8er+9 St&d' : Anal'sis o/ a "or-e Dra/t #ooling ower+; St&d' o/ her*ostati- E.)ansion (al
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012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 5
OBJECTIVE:St&d' the (a)o&r #o*)ression S'ste* (Te6t R"#+
INTRODUCTION:
he )ro-ess o/ re/rigeration is *ost -o**onl' a--o*)lished ' the e
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It will ha
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46 e*)+ o/ li@&id re/rigerant o&tlet /ro* e.)ansion de
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Lo-ate 1, , 3, and 4 on P+h #hart /or R61 143a &sing P1 1, P 3 : 4read s)e-i/i- enthal)'
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 7
OBJECTIVE:
St&d' the Ele-trol&. Re/rigeration (Te6t R"#+o deter*ine the #+!+P+ o/ the s'ste*
INTRODUCTION:
$a
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=# A1OR1ER3
0ater -o*es /ro* se)arator to the asorer+ A**onia
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 /
OBJECTIVE:
%eneral st&d' o/ a 0ater #ooler+
INDTRODUCTION:
he water -ooler is a s)e-ial &se o/ a re/rigerating *e-hanis*+ It is &sed to -oolwater Jon ta)K at a drin2ing )&r)ose+ he &s&al her*eti- -o*)ressionre/rigerating s'ste* is &sed+ he re/rigerant -ontrol is a -a)illar' t&e+Sin-e the de*and o/ drin2ing water is
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 8
OBJECTIVE:
"laring and Swaging o/ a #o))er &e+
INTRODUCTION:
Sin-e -o))er t&ing walls are too thin /or threading other *ethods o/ oiningt&ing to t&ing and t&ing to /itting are &sed+1 "laringC "laring is done to oin the t&ing to /ittings+ SwagingC Swaging is done to oin the t&ing to t&ing+
1) FLARING:
0hen -onne-ting t&ing to /ittings, it is -o**on )ra-ti-e to /lare the ends o/ thet&e and to &se /ittings designed to gri) the /lare /or a
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s)inning 'o2e too *&-h e-a&se this will thin the wall o/ the t&ing at the /lareand wea2en it+
!) SWAGING:
Swaging )er*its two )ie-es o/ so/t -o))er t&ing o/ the sa*e dia*eter to e
oined together witho&t the &se o/ /ittings+ It is *ore -on
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 =
OBJECTIVE:
%eneral St&d' o/ a Lea2 Dete-tor $alide or-h
INTRODUCTION:
Lea2 dete-tors are &sed to lo-ate the re/rigerant lea2s o/ a re/rigerating s'ste*+Lea2s in a re/rigerating s'ste* are &s&all'
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 >
OBJECTIVE:
%eneral St&d' o/ a 0indow ')e Air6-onditioner+
INTRODUCTION:
Air -an e heated or -ooled *oist&re -an e added or s&tra-ted to )rod&-e thee.a-t te*)erat&re : h&*idit' re@&ired in ea-h indi
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RE"RI%RAI!NCIt in-l&des -o*)ressor, -ondenser, strainer, -a)illar' t&e, e
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 ?
OBJECTIVE:
St&d' o/ a Dee) "ree8er #hest6t')e+
INTRODUCTION:
he -hest6t')e dee) /ree8er has -ertain ad
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Sin-e the -ondenser t&es are in -onta-t with the o&ter shell o/ the -ainet, heat/ro* the -ondenser )asses into the o&ter shell and war*s it slightl'+ his -a&ses anat&ral /low o/ war* air &)ward o
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3
OBJECTIVE:
St&d' : Anal'sis o/ a "or-ed Dra/t #ooling ower (Te6t R"#+#) o deter*ine the tower -hara-teristi- >a< L
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4 #onne-t the &nit to the *ain ele-tri-al s&))l' Do not swit-h on the *ains&))l' &ntil the ge'ser is /illed with water+
5 !)en the +-al>g+( A-tig hr+ Mass /low rate o/ air % >g hr+7 L% Ratio 9 Enthal)' o/ air at te*)erat&re 4 ha > >g "ro* )s'-hro*etri- -hart; Densit' o/ air at te*)erat&re T 4 *3 >g
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Mass /low rate o/ water L Rota *eter Reading F 1 F 3+ 2g hr Mass /low rate o/ air
-d F a F gh F T F 3== *3 hr
0here,a area o/ ori/i-ed dia o/ ori/i-e 17 **-d -o6e//i-ient o/ dis-harge =+h* di//eren-e o/ *ano*eter head
h h* F densit' o/ water 1===2g*3 densit' o/ air1+19 2g *3 Densit' o/ air 1+1 2g *3
TOWER DEMAND CALCULATION:
( I # @ater de3
w1 3 =+1 F 3 o #w 3 =+4 F 3 o #w3 3 =+ F 3 o #w4 3 =+; F 3 o #
Enthal)' hw1 at te*)erat&re w1 /ro* stea* tale > 2gEnthal)' hw at te*)erat&re w /ro* stea* tale > 2gEnthal)' hw3 at te*)erat&re w3 /ro* stea* tale > 2gEnthal)' hw4 at te*)erat&re w4 /ro* stea* tale > 2g
( II # Ar de3
ha enthal)' o/ Inlet 0et B&l e*)erat&re o/ Air ha1 ha =+1 F L% F 3 > 2gha ha =+4 F L% F 3 > 2gha3 ha =+ F L% F 3 > 2gha4 ha =+; F L% F 3 > 2g
Entha!py dfference3
hw1 ha1 hw ha hw3 ha3 hw4 ha4
$1 1 hw1 ha1$ 1 hw ha$3 1 hw3 ha3$4 1 hw4 ha4ower de*and NU or >a< h1 h h3 h4 4 3
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./# ????????????????????????????????????????????????????????????????????????
E4perment No+3
OBJECTIVE:
St&d' o/ a her*ostati- E.)ansion (al
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&l asors heat and sin-e its -hange rea-ts in a--ordan-e with the )ress&re6te*)erat&re relations, the )ress&re tending to o)en the
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 5.
OBJECTIVE:
E.)eri*ent on I-e Plant to -al-&late #+!+P+ : $eat Loss (Te6t R"#+
DESCRIPTION:
he I-e Plant wor2s on -al )er ho&r Re/rigeration #a)a-it'+
Compre66or3
$>135 V#" e-&*seh Ma2e
Compre66or) 1rne tanB nner Dmen6on63
375 L F 9= B F 3== $
D6p!acement3
5+=1 -- re<Thermo Co!e In6:!aton ThcBne663
15= **+
No+ of Ice Can63
9 Nos+
Eaporator Co!3
Length 3 /eet 35 /eet+Dia*eter 51K !D 7+; **
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MaterialC #o))er
N A-t&al re/rigerant e//e-tA-t&al #+!+P+ 0 Energ' s&))lied to the -o*)ressor,
As noted /ro* energ' *eter+
A-t&al re/rigerating e//e-t is the s&* o/ heat astra-ted ' rine o&tside the -anand water in -ans+ (ol&*e o/ rine in tan2 is the a))arent -al )er 4 ho&rs+
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$eat e.tra-ted in 2-al )er 2g o/ i-e+
0or2 done in 2-al )er *in&te wor2 done )er 2g+ !/ re/rigerant F Re/rigerant/low rate in 2g+ )er *in&te+
0 0or2 done )er 2g+ o/ re/rigeration total heat at total heat at 1 2-al 2g+
$eat e.tra-ted )er 2g+ !/ I-e /or*ed t +water t +i-e F S)+ $eat o/ water FLatent heat o/ i-e 2-al )er 2g+ >-alotal heat at )oint 1 Li@&id heat at 1 H1 L1 2g+
"ro* tales )ro)ortion o/ re/rigerant $"#6 134a >-al
otal heat at )oint Li@&id heat at )oint H L 2g+"ro* tales )ro)ortion o/ re/rigerant $"#6 134a
#ooling e//e-t N total heat at1 total heat at 4 total heat at 1 total heat at 3
otal li@&id heat at
NA-t&al #!P 0
A-t&al #!P Relati
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;+ Allow the &nit to r&n /or 4 ho&r to ring down the te*)erat&re o/ the rine 65o # to 615o #+
1=+ A/ter attaining re@&ired te*)erat&re /ill the i-e -ans with water &) to the *ar2 and insert the -ans+
11+ a2e all the readings te*)erat&re at
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"ro* tale /or R6134a,
Enthal)' o/ R6134a
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Asol&te )ress&re o/ R6134a sat&rated
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4+4339 F 1=5 ton o/ i-e
Plant -a)a-it' 15= 2g da' =+15= F 3=3975+71 45591+351 2 da'
+
+ + #a)a-it' to )rod&-e i-e e.-l&si
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
???????????????????????????????????????????????????????????????????????? E4perment No+3 55
OBJECTIVE:
#harging o/ New Re/rigerant ' &sing %as #harging >it+
INTRODUCTION:
o ser
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De6ra8e ne-essar' s'ste* oints, ens&ring no )ositi
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A/ter -on/ir*ing that the re/rigerator is )er/or*ing to s)e-i/i-ations, seal )ro-ess t&es+ Use sealing )liersin-h6o// tool+ Do&le )in-h the )ro-ess lines o/ h'dro-aron s'ste*+ A/ter )in-hing, re*o
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$A%'MI NARAIN CO$$EGE OF TEC'NO$OG) INDORE
DEPARTMENT OF MEC'ANICA$ ENGINEERING
012ECT3 REFRIGERATION & AIR-CONDITIONING (ME-./#
?????????????????????????????????????????????????????????????????????? E4perment No+3 57
OBJECTIVE:
St&d' o/ a Sling Ps'-hro*eter+
INTRODUCTION:
$&*idit' is a ter* &sed to des-rie the )resen-e o/ *oist&re or water
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)s'-hro*eter /or 1= to = se-onds, ta2e readings in o# /ro* oth ther*o*etersand re-ord the res<s+
Vo& *a' &se ale gi
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