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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&lts+

Vo& *a' &se ale gi

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