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sur le développement des zones arides et semi-arides

Titre : Experimental Investigation Of Various Evaporative Cooling Techniques For Pune Weather Conditions

Auteur : Milind M. Kulkarni

Université de soutenance : Shri Jagdishprasad Jhabarmal Tibarewala University

Grade : Doctor of Philosophy (PhD) in Mechanical Engineering 2017

Résumé partiel
The increased industrialization, high rate of urbanization, modernization from last three decades all across the world resulted continuous growth in power generation across the world. The emission of GHG from thermal power plant and vehicle transportation have resulted in global warming, severe air pollution at majority of locations. As a result air quality is degraded to such extent that it can cause severe threats to human health. Air conditioning is used to maintain and provide hygienic and comfortable conditions to human being. Air conditioners are extensively used for achieving comfort conditions in all sectors.However, higher power consumption by air conditioners, idleness in winter, non-hygienic recirculated dry and stale air,non-affordability to common man due to high initial and operating cost, their exponential growth, use of refrigerants with high ODP and GWP are serious issues. One environmental friendly and energy efficient cooling technique in form of evaporative cooling is a strong substitute for air conditioning without compromising thermal comfort and indoor air quality. The present work evaluates scope and potential of various evaporative cooling techniques to produce comfort conditions at any certain location for specific duration of year using feasibility index method. The conventional EC device is modified with various attachments to extend its year round operation. The cooling technique like DEC, IEC, IDEC, adiabatic mixing, natural ventilation, precooling, nocturnal cooling, refrigerated evaporative cooling and evaporative cooled condensers are tested for their performance during all weather conditions aiming to avoid use of air conditioner. The direct evaporative cooling method was tested for its operation for location of cooler, condition of ventilation, pad material, air speed, pressure drop and most economical and silent operation during year. Further, performance of innovative indirect methods using earthen pot is tested for various ambient conditions when direct addition of moisture is restricted. The combination of direct and indirect method is also tested to increase utilization to produce more comfortable conditions. In additional, two air streams mixing to control humidity, nocturnal cooling to increase effectiveness and maintain cool air in conditioned space during peak hours and evaporative cooled condenser cooling are tested to extend potential use of various evaporative cooling techniques. The refrigerated evaporative cooling is used to produce and maintain comfortable temperature at lower range

Présentation et version intégrale (Shodhganga)