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Experimental and Theoretical Analysis of CaCl2 Liquid Desiccant System with Solar Regeneration

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Recent Advances in Energy Technologies

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

The building consumes a momentous amount of universal total energy, predominantly heating, ventilation, and air conditioning system that consumes 50% of the said energy of the building. Energy usage consumption of dehumidification varies from 20 to 40% of the total heating, ventilation, and air conditioning system. Desiccant cooling can be regarded as an environmentally friendly air conditioning technology. CaCl2 liquid desiccant is more cost-effective and adaptable in its use of low-grade energy sources, as well as beneficial in delivering elevated quality supply air with unbiased humidity and temperature control. Theoretical and experimental analysis are done to assess the desiccant cooling system’s performance and regeneration with the solar thermal collector. A flat thermal collector is tested for heating of desiccant solution, with a collector efficiency of 22% for the hot fluid temperature of 70 ℃. An analytical method is used to determine the performance of vertical film type dehumidifier, for different parameters such as the solution’s concentration; the temperature of desiccant enters into the dehumidifier flow of air and desiccant. Dehumidification performance increases as concentration increases, mass removal rate increases by 21.8% but the mass removal rate decreases by 12.7% as the temperature of the desiccant solution increases. The dehumidification cooling rate is a maximum of 1.02 kW for the concentration of 45% at 18 ℃, thus dehumidification performance is shown better results at higher concentrations and low temperatures. Air and desiccant flow have an influence on mass removal rate up to a certain limit, as increasing airflow, more than 450 m3/hr, and desiccant flow rate of 0.512 kg/s has no effect as contact time between air and desiccant decreases. Regeneration performance increases as solution temperature increases, mass evaporation increases by 50%. Since solar energy is used, the total energy of the system reduces and emissions-related also reduce.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Anna University, Chennai, India

    D. Sarukasan, S. Sudharson, M. Prahadeeswaran & S. Ajeeth Austin

  2. Anna University, Chennai, India

    K. Thirumavalavan

Authors
  1. D. Sarukasan
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  2. S. Sudharson
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  3. K. Thirumavalavan
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  4. M. Prahadeeswaran
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  5. S. Ajeeth Austin
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Correspondence to D. Sarukasan .

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Editors and Affiliations

  1. Dept. of Mechanical Engineering, Sri Sivasubramaniya Nadar College of Eng, Chennai, Tamil Nadu, India

    N. Lakshmi Narasimhan

  2. Dept. of Mechanical Engineering, Universitat Rovira i Virgili, Tarragona, Spain

    Mahmoud Bourouis

  3. Dept of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

    Vasudevan Raghavan

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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Sarukasan, D., Sudharson, S., Thirumavalavan, K., Prahadeeswaran, M., Austin, S.A. (2023). Experimental and Theoretical Analysis of CaCl2 Liquid Desiccant System with Solar Regeneration. In: Narasimhan, N.L., Bourouis, M., Raghavan, V. (eds) Recent Advances in Energy Technologies. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-3467-4_2

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  • DOI: https://doi.org/10.1007/978-981-19-3467-4_2

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-19-3466-7

  • Online ISBN: 978-981-19-3467-4

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