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Dr. Ramadas Narayanan

Central Queensland University6, University Drive Bundaberg, Australia


Talk Title
Performance Evaluation of a Residential Desiccant Evaporative Cooling System for the Climatic Conditions of Brisbane, Queensland, Australia

Talk Abstract

The air conditioning industry faces many challenges as the demand for a comfortable indoor environment continues to increase. Air conditioning accounts for a major part – up to 40% – of the energy use in buildings. Widespread air conditioning system installation not only increases the total energy consumption, but also raises the peak load demand. The peak demand in many Australian cities is growing at about 50% more than the base demand growth and, in some areas, up to four times the average which, in turn, requires higher generation capacity. These challenges emphasise the necessity of developing a green and sustainable system which minimises the negative human impacts on the natural surroundings, materials and resources, and on the processes that prevail in nature. Heat-driven air conditioning systems are systems which use low-grade thermal energy like solar energy and waste heat rather than electricity. These systems can produce significant energy savings, have low global warming and ozone depletion potential and ensure higher indoor air quality. Among these systems, the desiccant evaporative cooling system is the most significant due to its low dew point, high capacity, continuous operation, light weight and simplicity of design which make it easy to maintain. This paper evaluates the applicability of this technology to the climatic conditions of Brisbane, Queensland, Australia, specifically for the residential sector. Given the subtropical climate of Brisbane where humidity levels are not excessively high during cooling periods, the numerical study shows that such a system can be a potential alternative to the refrigerative air conditioning systems. The paper also discusses the economy cycle option for the system in such a climate and compares its effectiveness to the natural ventilation. 

Short Biography

Dr Ramadas Narayanan is a Mechanical Engineer with diverse ranges of experiences over 20 years which include industrial experience, innovative research experience, and several academic experiences in variety of roles over different universities and programs

He holds a PhD in Sustainable Energy Engineering from the University of South Australia. His PhD research was on the development of a solid desiccant system for dehumidification/cooling in a solar air-conditioning system, and this was carried out in collaboration with CSIRO Energy Technology Centre in Newcastle.

He has over 30 publications including publications in top-rated journals and has over 120 lifetime citations.  He received an award from Australian Institute of Refrigeration, Air-conditioning and Heating (AIRAH) for outstanding scholarship in the refrigeration and air-conditioning industry in consideration of the work carried out for PhD. He was also nominated for South Australian State government’s Science Excellence Award for the category of PhD Research Excellence. H also received many teaching excellence awards including CQ University’s Vice Chancellor’s award for outstanding contributions to learning and teaching.

Talk Keywords
Air conditioning, desiccant evaporative cooling systems, energy consumption, sustainable energy.
Target Audience
Students, Post doctoral researchers, Industry partners, University faculties
Speaker-intro video

The International Conference on Innovative Applied Energy (IAPE’18)