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regenerative air cooler
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REGENERATIVE AIR COOLER(UNDER THE GUIDENCE OF-PROFF. H.P
GUPTA)
SUBMITTED BY:YAMIKA PATELSUMIT SINGHPREM KUMARPARUL DIXIT
MONTH JUNE-AUG.2013
SEPT-NOV 2013
JANAURY 2014
FEB 2014
MARCH 2014
APRIL2014
ACTIVITY
1st
Data search and study
ACTIVITY2nd
Selection of materials & design layout
ACTIVITY3rd
Design & Assembling of parts
ACTIVITY4th
Assembling continued…
ACTIVITY5th
Testing of system
ACTIVITY6th
Preparation of report
PROJECT SCHEDULE FORMAT
REGENERATIVE AIR COOLER
Main Components Of The Regenerative Air Cooler Are:1. Blower2. Blower3. Motor4. Duct5. Water Pad 6. Heat Exchanger7. Water Pad 8. Water Tank9. Water Pump
MATERIAL SELECTION:
HEAT EXCHANGER
FABRICATION OF THE HEAT EXCHANGER
Obtain MS rods for studs
Order GI sheets for
heat exchanger
Obtain insulation
for HE
Purchase adhesive
Manufacture 5 studs
Cut the sheets and drill holes
Cut the insulation into
proper size
Assemble the heat exchanger
TOP VIEW OF REGENERATIVE AIR COOLER
RIGHT HAND SIDE OF REGENERATIVE AIR COOLER
LEFT HAND SIDE VIEW OF REGENERATIVE AIR COOLER
FRONT VIEW OF REGENERATIVE AIR COOLER
BACK SIDE VIEW OF REGENERATIVE AIR COOLER
MOTOR PERFORMANCE CHARECTORISTICS:POWER=95 WBLADE VELOCITY=
ПDN/60=П×.18×1300/60=12.25 m/secAC SUPPLY=230 VCURRENT=.4 ampFREQUENCY=50 Hz
CALCULATION FOR BLOWER 2 Entering Air velocity, Vin= 6.62 m/sec Inlet area, Ain=П/4(.16^2+.12^2) Ain=.0314 m2
Q = Ain×Vin By applying Bernoulli’s equation Q=const Q= .208 m3/sec=12.4 m3/min Outlet area, out=.13×.13= .0169 m2 Exit Air velocity, Vout=Q/A=.208/.0169=12.3 m/sec
CALCULATION FOR DUCT
Inlet area, Ain=.13×.13= .0169 m2 Entering Air velocity, Vin=Q/A=.208/.0169=12.3 m/sec By applying Bernoulli’s equation Q=constant Q= .208 m3/sec=12.4 m3/min Outlet area, Aout=.205×.13=.02665 m2
Exit Air velocity, Vout =Q/A=.208/.02665 = 7.8 m/sec
CALCULATION FOR WATER PAD DBT1=38°C WBT1=21°C RH1=20% H1=60.25 KJ/Kg of air Spe. Vol, Vs1=.89 m3/Kg DBT2=36.5°C WBT2=27°C RH2=50%
H2=85 KJ/Kg of air SPE. VOL, Vs2=.91 m3/Kg Mass of Air Supplied ma=Q/Vs=12.8/.91=14.06Kg/min Ma=.234 Kg/sec
CALCULATION FOR HEAT EXCHANGER TH1=38°C TH2=? TC1=36.5°C TC2=? Capacity rate of air, (C) min=ma
U=
H=40, l=.0005, k=52
U= =19.996
A=16(l × b) =16(.23×.23) =.8464 UA=19.996×.8464=16.92
N=70.58
ε=.92 TH1=38°C TH2=? TC1=36.5°C TC2=?
ε =
ε =
(38-36.5) ε =38- TH2 (38-36.5) ε =38- TH2 1.5× .92= 38- TH2 1.38 = 38- TH2 TH2 =36.62 °C 1.38 = TC2-36.5 TC2=37.88°C Temp. Of atm air, TH1=38°C Temp. Of treated atm air, TH2=36.62°C Temp. Of cooled air from water pad, TC1=36.5°C Temp. Of exit air, TC2=37.88°C
1.Refrigeration and air conditioning………………..Khurmi and Gupta2. Refrigeration and air conditioning………………..Arora and Domkundwar 3. Refrigeration and air conditioning………………..C.P. Arora 4. Refrigeration and air conditioning………………..P.L. Balany