1 HIBAH PENGEMBANGAN COURSE CONTENT BERBASIS WEB & MULTIMEDIA PROGRAM HIBAH KOMPETISI K 1 INHERENT UNIVERSITAS GADJAH MADA 2006 HIBAH PENGEMBANGAN COURSE.
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HIBAH PENGEMBANGAN COURSE CONTENT HIBAH PENGEMBANGAN COURSE CONTENT BERBASIS WEB & MULTIMEDIABERBASIS WEB & MULTIMEDIA
PROGRAM HIBAH KOMPETISI K 1 INHERENT UNIVERSITAS GADJAH MADA 2006
Mechanical Engineering DepartmentMechanical Engineering DepartmentFaculty of EngineeringFaculty of Engineering
Gadjah Mada UniversityGadjah Mada University2006/20072006/2007
22
Topics :Topics :
• 1. AC Principle1. AC Principle• 2. Human being 2. Human being
thermodynamicthermodynamic• 3. Cooling Load3. Cooling Load• 4. Psychrometric 4. Psychrometric • 5. Type of AC5. Type of AC• 6. Air Handling Unit 6. Air Handling Unit
(AHU)(AHU)• 7. Fan Cooling Unit 7. Fan Cooling Unit
(FCU)(FCU)• 8. Trouble Shooting8. Trouble Shooting
33
AC PrincipleAC Principle• AC controls airAC controls air : :
– TemperatureTemperature– RH %RH %– QualityQuality– Air CirculationAir Circulation– NoiseNoise
• Refrigeration Refrigeration ApplicationApplication– Cold storageCold storage– Room ACRoom AC– Textile IndustryTextile Industry– Ice Cream FactoryIce Cream Factory– Electronic Electronic
ManufactoryManufactory– Mall, High Rise Mall, High Rise
Building etcBuilding etc
44
Air Composition :Air Composition :
• Atmosphere Air Atmosphere Air StandardStandard– G = 9,807 m/sG = 9,807 m/s22
– T = 15 T = 15 CC– P = 1 atm = 14,7 psi P = 1 atm = 14,7 psi
= 101,325 kPa= 101,325 kPa– P v = R TP v = R T– = 1,225 kg/m= 1,225 kg/m33
– R = 287 J/kgKR = 287 J/kgK
Dry Air :O2 = 20,95%N2 = 78,09%CO2= 0,03%Ar = 0,93%BM =28,965
Moisture(H2O)BM=18
55
Sifat-sifat udaraSifat-sifat udara
• Tekanan, P = PTekanan, P = Paa + P + Pvv
• Kelembaban spesifikKelembaban spesifik
• Kelembaban relatifKelembaban relatif
• Tingkat kejenuhanTingkat kejenuhan
• Volume spesifik, vVolume spesifik, v
•Temperatur bola Temperatur bola kering, Tkering, Tdbdb
•Temperatur bola Temperatur bola basah, Tbasah, Twbwb
•Temperatur jenuh, TTemperatur jenuh, Tdpdp
•Enthalpi, hEnthalpi, h
a
v
a
v
P
P622,0
m
m
s
a
P,Ts
v
P,Ts
v
P
P
622,0P
PRH
P,Ts
va hhh
dbdb T86,13,2501Th
88
Thermodynamic process
012
3
4 5
6
7
8
Proses :0-1 = Sensible heating0-2 = Sensible cooling0-3 = Humidification0-4 = Dehumidification0-5 = Heating & Dehumidification0-6 = Heating & Humidification0-7 = Cooling & Humidification0-8 = Cooling & Dehumidification
99
Human Being Human Being ThermodynamicThermodynamic
Hm = 100%
UDARA(0,5 m3/jam)
Ha = 2%
HL = 80%
W = 20%
Hc = 25%HR = 43%
He = 30%
SENSIBEL
LATEN
Hm – W = He + Hc + HR
Heat reject man = 105 – 117 Watt/man
1515
Energy SourceEnergy Source
• Internal :Internal :– PenghuniPenghuni– LampuLampu– Peralatan listrikPeralatan listrik
• Eksternal :Eksternal :– InfiltrasiInfiltrasi– Radiasi suryaRadiasi surya– Konduksi, konveksiKonduksi, konveksi
• VentilasiVentilasi
• Fan, ductingFan, ducting
Lampu
Peralatan listrik
Penghuni
Infiltrasi
Konduksi
1TR = 12 000 Btu/hr = 3,5 kW = 3000 kcal/hr
1616
Pengelompokan beban Pengelompokan beban pendinginanpendinginan
TR, RH%
RSH,RLH,RTH
ERSH, ERLH, ERTH
AHUSA DA MA
OA
EA
RA
RA
BABF
OASH,OALHOATH
TSH,TLH,GTH
ERSH = RSH + BF.OASHERLH = RLH + BF. OALHERTH + ERSH + ERLH
TSH = RSH + OASHTLH = RLH + OALHGTH = TSH +TLH
GTH
TSHGSHF
ERTH
ERSHERSHF
RTH
RSHRSHF
1919
Kebutuhan udara suplaiKebutuhan udara suplai
• Satuan BritishSatuan British• CFMCFMsasa
• Satuan SISatuan SI• CMMCMMSASA
SAR
SAR
saR
hh02,0
RTH
68,0
RLH
TT1,1
RSH
SAR
SAR
saR
hh02,0
RTH
50
RLH
TT0204,0
RSH
RSH,RLH, RTH (Btu/hr)T (F), ( grain/lb)CFM (ft3/min)
RSH,RLH, RTH (kW)T (F), ( gram/kg)CMM (m3/min) = 35 CFM
2020
adpRDA TTBF11,1
ERSHCFM
BFBF AplikasiAplikasi ContohContoh0.3 – 0.50.3 – 0.5 Beban kecilBeban kecil RecidenceRecidence
0.2 – 0.30.2 – 0.3 Beban besarBeban besar
SHF kecilSHF kecilRecidence, Recidence, Retail shop, Retail shop, factoryfactory
0.1 – 0.20.1 – 0.2 KenyamananKenyamanan Dept. Store, Dept. Store, Bank, factoryBank, factory
0.05 – 0.10.05 – 0.1 Beban besarBeban besar
Beban laten besarBeban laten besarDept. Store, Dept. Store, RestaurantRestaurant
0.0 – 0.10.0 – 0.1 All Outdoor SystemsAll Outdoor Systems Hospital, Hospital, Operation Operation RoomRoom
2121
Tabel Bypass FactorTabel Bypass Factor
Pipe/rowPipe/row3 Fin/cm3 Fin/cm 6 Fin/cm6 Fin/cm
Air Velocity (m/min)Air Velocity (m/min)
9090 210210 9090 210210
22 0.420.42 0.550.55 0.220.22 0.380.38
33 0.270.27 0.400.40 0.100.10 0.230.23
44 0.190.19 0.300.30 0.050.05 0.140.14
55 0.120.12 0.230.23 0.020.02 0.090.09
66 0.080.08 0.180.18 0.010.01 0.060.06
88 0.030.03 0.080.08
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