An Innovative Approach for Design of Passive Downdraft Evaporative Cooling System

IJEP 42(4): 470-475 : Vol. 42 Issue. 4 (April 2022)

Hangargekar Pradeep Abasaheb1,2, K.R. Harne3*, H.H. Shinde1 and Athar Hussain3

1. MGM’S Jawaharlal Nehru Engineering College, Aurangabad – 431 003, Maharashtra, India
2. Shri Tulja Bhavani Engineering College, Tuljapur – 413601, Maharashtra, India
3. Netaji Subhas University of Technology, Civil Engineering Department, West Campus, New Dehli – 110 073, India


Passive downdraft evaporative cooling (PDEC) system is a traditional technique of air cooling in hot and dry climates of deserts of Iraq, Tehran, Turkey and Egypt. In present work, PDEC system is restudied for its usefulness, limitations and drawbacks and probable modifications have been suggested to suit energy requirements of built forms. In the present work, efforts have been made to study and design to modify traditional PDEC system and improve its cooling efficiency with help of design of field experimentation, experimental variables, controls and treatments. Theoretical modified PDEC models has been suggested for field experimentation based on the shower model given by B. Givoni. Geometric design of wind catcher has been altered in innovative ways to improve its wind capture efficiency. Modified PDEC shaft square in cross-section is reduced to half of its size from top to bottom to increase wind flow rate of cooled air. Nocturnal water cooling techniques are used to improve air cooling efficiency. Three different water treatments have been studied for wind-catcher conditions for field experimentation model.


Evaporative cooling, Heat transfer, Wind catcher, Meteorology, Passive downdraft, Bacteriological infections, Comfort condition


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