Cooling Tower


In Thermal Power Plants (Coal or Nuclear Based) where water is used as a working fluid; the low pressure and low temperature steam is converted into liquid state for further operation. The condenser which is basically a heat exchanger requires cooling water to condense the incoming steam. Hence, a cooling tower becomes an auxiliary which circulates cooling water in the condenser. Due to the continuous recirculation of water in the condenser, the following problems are observed:

  • Corrosion of Pipes and Heat Exchanger Units

  • Scaling in Condenser Pipes

  • Microbial Growth

  • Due to scaling and biofilm formation, heat transfer rates are affected.

  • Due to continuous deterioration of cooling water, more make up water is required and blow downs are increased; subsequently reducing the Cycles of Concentration (CoC).


    Ozone works very well under such circumstances and has achieved the following results:
  • Reduction in blow down Rates due to improvement in the quality of the water under recirculation.

  • Since ozone oxidizes the biofilm which serves as a binding agent adhering scale to heat exchanger units; scale buildup is reduced and higher heat transfer rates are achieved.

  • Due to lesser blow down rates, make up water requirement is reduced which leads to financial savings.

  • Requirement of chemicals for anti scaling and bio-fouling control are either reduced or eliminated after a few months.

  • Ozone also finds its use in Raw Water Treatment in Power Sectors for impeccable disinfection.

    Ozone Research and Applications (I) Pvt. Ltd. has executed a number of projects in the field of cooling towers. Our satisfied clients in this sector include:

  • Khaparkheda Thermal Power Station : 6 kg/hr Ozonisation System (YOI: 2006)

  • Indorama Synthetics: 40 g/hr Ozonisation System(YOI: 2008)

  • Paras Thermal Power Station: 8kg/hr Ozonisation System( YOI: 2008)

  • Paras Thermal Power Station (Raw Water): 2 kg/hr Ozonisation System (YOI: 2008)

  • Khaparkheda Thermal Power Station (Raw Water): 2 kg/hr Ozonisation System (YOI: 2008)

  • Parli Thermal Power Station: 12 kg/hr Ozonisation System (YOI: 2009)

  • Parli Thermal Power Station (Raw Water): 1.1 kg/hr Ozonisation System (YOI: 2009)

  • Parli Thermal Power Station Unit II: 12 kg/hr Ozonisation System (YOI: 2010)

  • Paras Thermal Power Station Unit II: 8 kg/hr Ozonisation System (YOI: 2013)

  • Khaparkheda Thermal Power Station Unit II: 13kg/hr Ozonisation System (YOI: 2015)

  • AIIMS, Bhubhaneshwar: 800 g/hr Ozonisation System (Under Execution)

  • Karnataka Power Corporation Limited (in association with BHEL), Bellary: 20 kg/hr Ozonisation Plant (Under Execution)