Experimental Investigation of Evaporative Air Cooling Potential For Passenger Mobiles

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2021 by IJETT Journal
Volume-69 Issue-8
Year of Publication : 2021
Authors : Sandeep Shalgar, Rupa Bindu
  10.14445/22315381/IJETT-V69I8P208

MLA 

MLA Style: Sandeep Shalgar, Rupa Bindu  "Experimental Investigation of Evaporative Air Cooling Potential For Passenger Mobiles" International Journal of Engineering Trends and Technology 69.8(2021):62-70. 

APA Style: Sandeep Shalgar, Rupa Bindu. Experimental Investigation of Evaporative Air Cooling Potential For Passenger Mobiles  International Journal of Engineering Trends and Technology, 69(8),62-70.

Abstract
In automobiles, even recent advances in vapor compression refrigeration using R134a refrigerant have still caused global warming potential, and environmentfriendly ozone depletion is now no more hidden fact. In this paper, an innovative direct evaporative system is mathematical modeled, designed for 1kW, and developed for the passenger mobiles application of 2.8m3 cabin volume. Cellulose pad indirect evaporative cooling is used, and the system is installed in the vehicle for its performance evaluation. The research reveals the lower power consumption of blower motor by 8% if pad is just wetted by water spraying for 60seconds duration than keeping pump continues on condition. Model vehicle cabin air temperature and relative humidity are mapped for ambient air conditions of 39.6°C and 59.6% RH at 14 pm parked on sunny days. The cabin air temperature increases with ambient soaking, and after 38th min from the start of the test is found the stable meeting to 60°C and 54.1°C in front and rear of the cabin. This gives maximum rise of cabin air temperature by 19.2°C and 13.3°C at cabin front and rear. The cabin air humidity is dropped to 32.5% at the 40th minute of the test when ambient relative humidity was 38.7%. The average air grill temperature, cabin front, and rear air temperatures are mapped with the time duration of 10minutes in each of three blower speeds. After 10 minutes, the DEC is switched ON with fan speed 1, the cabin front and rear temperature dropped from 41.1 ˚C to 35.8 ˚C and 36.4 ˚C, respectively. The average drop at 1st speed was 36.1 ˚C. Subsequent to this at speeds 2 and 3 at the 30th and 40th minutes of the test cycle, cabin air temperature is dropped to 6.2 ˚C and 9.6 ˚C. As the speed of the DEC system increases, the cooling capacity also increases. The maximum cooling effect at speed 3 of the blower motor is 1042Watts with ambient air temperature drop from 41.9 ˚C to 32.4 ˚C. The developed cellulose direct evaporative system was found effective by reducing air temperature by 9.5 ˚C, giving better comfort to users. The COP of the system is achieved to 4.38 at maximum fan speed. The developed model is scalable as per the availability of space inside vehicle compartments.

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Keywords
Alternative cooling technologies, Evaporative cooling system, Direct evaporative cooling, Cellulose pad, automobile cabin air cooling.