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Mahabir Bhandari, Ph.D., Oak Ridge National Laboratory
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Jyotirmay Mathur, Dr.Ing., Malaviya National Institute of Technology
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Robin Jain, Malaviya National Institute of Technology
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Yasin Khan, P.E., Malaviya National Institute of Technology
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Prateek Srivastava, Malaviya National Institute of Technology
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Radiant cooling system has proven to be a low energy consumption system for building cooling. This study describes the use of cooling tower in radiant cooling system to improve the system efficiency. A comprehensive simulation feasibility study of the application of cooling tower in radiant cooling system was performed for the fifteen cities in different climatic zones of India. It was found that in summer, the wet bulb temperature (WBT) of the different climatic zones except warm-humid is suitable for the integration of cooling tower with radiant cooling system. In these climates as an average 24°C to 27°C temperature of chilled water can be achieved by using cooling tower. In order to achieve the energy saving potential the three different configurations of radiant cooling system have been compared in terms of energy consumption. The different configurations are: the radiant cooling system integrated with cooling tower to provide chilled water to the floor, wall and ceiling mounted tubular installation. A variable air volume system is also coupled for the dehumidification, ventilation and additional cooling. The radiant cooling system integrated with cooling tower to provide chilled water to the wall and ceiling mounted tabular installation. In this arrangement a separate chiller has also been used to provide chilled water at 16°C to the floor mounted tubular installation. A dedicated outdoor air system is also coupled for dehumidification and ventilation purpose. The radiant cooling system integrated with cooling tower to provide chilled water to the wall mounted tabular installation and a separate chiller is used to provide chilled water at 16 °C to the floor and ceiling mounted tabular installation. A dedicated outdoor air system is also coupled for dehumidification and ventilation. A conventional all-air system has also been simulated as a baseline to compare these configurations for assessing the energy saving potential.
