Psikometric
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Transcript of Psikometric
PSIKOMETRIC
By : PT. Daikin Applied Solutions Indonesia
1. Mengatur Suhu udara2. Mengatur Sirkulasi Udara3. Mengatur Kelembaban (Humidity) udara4. Mengatur Kebersihan Udara
AIR CONDITIONER
NYAMAN ITU ADALAH SESUATU YANG TAK BERLEBIHAN ATAUPUN TAK KEKURANGAN
UDARA
PERUBAHAN WUJUD1. CAIRAN
- Menerima kalor Menguap (3) Evaporasi air mendidih- Melepas kalor Memadat (2) Solidifikasi air jadi es batu
2. PADATAN- Menerima Kalor Mencair (3) fusi es batu mencair- Menerima kalor Menguap (3) Sublimasi kamper
3. GAS
- Melepas Kalor Mencair (1) Kondensasi embun - Melepas Kalor mengkristal (2) Salju
LATENT OR SENSIBEL ?
Latent VS Sensibel
DryBlub
RelativeHumidity
DewPoint
100%Saturation
EnthalpyBTU / lb
WetBlub
Grains of Moisture
SpecificVolume
Breakdown of the Lines
UDARA
PROSES PSIKOMETRIC
1. AIR FLOW UDARA
2. ROOM DESIGN
3. ON COIL• Full fresh air• Mixing• Full Return air
4.OFF COIL
5.HEATER
AIR FLOW
• Volume Ruangan x air change– m3/h
• Area x Velocity– m3/s
• Fresh air / Return air / Mixing airkonversi
1 m3/h = 0.588578 CFM
1 m3/s = 2 118.88 CFM
1 CFM = 0.471947443 l/s
1 l/s = 2.11888 CFM
Air change
ROOM DESIGN
• STANDAR 24 - 26 TDB / 50% RH• Ruang OK 20 - 23 TDB / 50% RH
• Setelah tahu berapa room design check nilai Dew point nya• Dew Point menjadi Patokan untuk mencari nilai leaving air
On COIL
• Full Fresh Air 33 – 35 TDB / 60 - 80% RH• MiXing Air Return Air + Fresh Air• Return Air 27 TDB / 19 TWB
On COIL Off COIL
OFF COIL• Harus mengetahui nilai Room Design condition• Cari Nilai Dew Point untuk Room Design• Angka Minimal sama dengan dew point• Leaving lebih besar dari dew point hanya akan menghasilkan
pendinginan sensibel tidak akan terjadi kondensasi• Temp Lebih rendah lebih bagus lebih Ringan
Off Coil
Desain Airflow Ruangan
Air Flow = Room Vol. x ACH
= 124.43 m^3 x 30/hour
= 3733 m^3/hour
= 1045 lps
Desain Temperatur Ruangan
RA dbRA db = 20= 20 Cᵒ
RA RH= 50%RA RH= 50%
Outside Air Design
OA dbOA db = 34= 34
OA RH= 70%OA RH= 70%
RA dbRA db = 20= 20 Cᵒ
RA RH= 50%RA RH= 50%
LA Temperature
Tadp 8.8 CᵒSA db 9.2 CᵒSA wb 9.0 Cᵒ
OA dbOA db = 34= 34
OA RH= 70%OA RH= 70%
RA dbRA db = 20= 20 Cᵒ
RA RH= 50%RA RH= 50%
Coil Capacity
Tadp 8.8 CᵒSA db 9.2 CᵒSA wb 9.0 Cᵒ
OA dbOA db = 34= 34
OA RH= 70%OA RH= 70%
RA dbRA db = 20= 20 Cᵒ
RA RH= 50%RA RH= 50%
Cooling C
oil
Cooling C
oil
Late
nt H
eat
Late
nt H
eat
Sensible HeatSensible Heat
Coil Capacity
Sensible = 1.23 x AF x (Oadb – Ladb)
= 1.23 x 1045 lps x (34 C – 9.2 C)ᵒ ᵒ= 31. 9 kW
Latent = 3.01 x AF x (OaW – LaW)
= 3.01 x 1045 lps x (23.9 g/kg – 7.1 g/kg)
= 52.8 kW
Total = Sensible + Latent
= 31.9 kW + 52.8 kW
= 84.7 kW
Heater Capacity
Tadp 8.8 CᵒSA db 9.2 CᵒSA wb 9.0 Cᵒ
OA dbOA db = 34= 34
OA RH= 70%OA RH= 70%
RA dbRA db = 20= 20 Cᵒ
RA RH= 50%RA RH= 50%
Cooling C
oil
Cooling C
oil
SHR MaxSHR Max SHR MinSHR Min
1717 Cᵒ 9.29.2ᵒC
HeaterHeater
Heater Capacity
Heater = 1.23 x AF x (SA SHR 0.95 – SA SHR 0.85)
= 1.23 x 1045 lps x (17 C – 9.2 C)ᵒ ᵒ= 10 kW
Unit Selection
Cooling Cap. = 84.7 kW
Heating Cap. = 10 kW
Air Flow = 1045 lps
EA Coil = 34 C/29.14 Cᵒ ᵒLA Coil= 9.2 C/9 Cᵒ ᵒ
Thank You