Solution Manual for Thermal Radaiation Heat Transfer 6th Edition by Howell - Ch. 1-17, 9781466593268, with Rationales

SNS COLLEGE OF ENGINEERING
a a a


Kurumbapalayama(Po),aCoimbatorea–a641a107

AN AUTONOMOUS INSTITUTION
a a



AccreditedabyaNBAa–aAICTEaandaAccreditedabyaNAACa–
a UGCawitha‘A’aGradeaApprovedabyaAICTE,aNewaDelhia&aAffiliatedatoaAnnaaUniversi
ty,aChennai

DEPARTMENT OF MECHANICAL ENGINEERING
a a a




THERMAL ENGINEERING LABORATORY
a a




USER MANUAL
a

, LIST OF EQUIPMENTS
a a




S.No Date NameaofaExperiments PageaNo. Marks Sign

DeterminationaofaCOPaofa
1.
RefrigerationaSystem
DeterminationaofaCOPaofaAira
2.
ConditioningaSystem
PerformanceaTestaona2astageaR
3.
eciprocatingaAiraCompressor
ValveaTimingaDiagramaofa4astagea
4.
PetrolaandaDieselaEngines

5. PortaTimingaDiagrams

MorseaTestaona4-
6.
Stroke,aMultiaCylinderaPetrolaEn
gineaTestaRig
HeataBalanceaTestaona4aStrokea
7.
DieselaEngine

8. FlashaandaFireaPoint

DeterminationaofaViscosityaofathea
9.
givenaliquid
StudyaofaCoolingaTower
10.

, 48
Exp.No: DETERMINATIONaOFaCOPaOFaREFRIGERATION
SYSTEM
Date:


OBJECTIVES:
Onacompletionaofathisaexperimentatheastudentsawillabeaableato
4. Understandatheastructureaandafunctionaofaaarefrigerantasystem
5. Understandawhataisatonnageaofarefrigeration
6. Quantifyatheaperformanceaofarefrigerationacycles


AIM:
Toa conducta thea testa ona refrigerationa testa riga witha aa refrigeranta R134aa toa determine
theaCoefficientaofaPerformancea(COP).


APPARATUSaREQUIRED:
1. Refrigerationatestarig
2. Thermometer
3. Stopwatch


FORMULA:

Inputa powera =a
(x) x 3600 x
a
a a a
1
t c
Wherea xa =aNumberaofablinksainaenergyameteraC
a=aEnergyameteraconstanta=a3200
ta=aTimeainasecondsa(sayaforaeverya5ablink)
1. Switchaonatheafanaandanoteadownatheafanainputapower
(5)a
Fana inputa =a xa 3600a x aaa 1a a KW
t 3200
2. Switchaonatheacompressoraandanoteadownatheacompressora&afanainputapower
(5)a
Compressora &a Fana inputa =a xa 3600a x aaa 1a a KW
t 3200
Totalainputapower =aINPUTaPOWERacompressora&aFan-aINPUTaPOWERaFan

, 49
HeataExtracted =amassaofawateraxaspecificaheataofawateraxaDropainatemperature
=amWaxaCpaxa(T1-aT2)


Table1
DurationaofaTest Saya30amin
FanaInputaPower (5)x 3600 x
a
a a
a a 1a
kw=
a



t 3200
Compressora&aFanaInput (5)axa3600axa a 1a a kw=
Power t 3200

TotalaInputapower INPUTaPOWERacompressora&aFan-aINPUTaPOWERaFan




Amountaofawateratakenain 16alita=aapproxa16akg
evaporator
InitialawateraTemperature T1=
FinalaWateraTemperature T2=
DropainaTemperature T1a–aT2a=
HeataExtracted mWaxaCpaxa(T1-aT2)
=16axa4.186ax(T1-aT2)




Tablea2


Pressure P1= P2= P3= P4=
Temperature T1= T2= T3= T4=


Note:a1aPSIa=a0.067abar


1. ActualaCo-efficientaofaperformancea(COPactual)

(C.O.P) refrigeration effect
actual =
a

Power input

RefrigeratingaEffecta=aHeataExtracted