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Performance enhancement of earth air tunnel heat exchanger using evaporative cooling

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  • Vikas Bansal
  • Jyotirmay Mathur

Abstract

A thermal model has been developed to investigate the potential of using the storage capacity of the ground for cooling with the help of an earth to air heat exchanger (EAHE) system integrated with evaporative cooler. Parametric studies performed for the EAHE coupled with the evaporative cooler illustrate the effects of buried pipe length, pipe diameter, volumetric flow rate of air, number of pipes and surface-to-volume (S/V) ratio on the outlet temperature of the EAHE. An analytical solution has been derived by considering the fundamental equation of energy, heat transfer and psychrometry, for predicting the temperature at the outlet of EAHE. The results of the EAHE coupled with evaporative cooling are compared with that of EAHE without evaporative cooling for different S/V ratio and bypass factor. It is observed that the length of the EAHE pipe is reduced significantly as much as 93.5% for obtaining desired temperature at the outlet of the EAHE by the integration of evaporative cooling with EAHE. Reduction in the length of buried pipe is also noted with decrease in bypass factor of evaporator cooler. Copyright The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Suggested Citation

  • Vikas Bansal & Jyotirmay Mathur, 2009. "Performance enhancement of earth air tunnel heat exchanger using evaporative cooling," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 4(3), pages 150-158, May.
    • Handle: RePEc:oup:ijlctc:v:4:y:2009:i:3:p:150-158
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctp017
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    Cited by:

    1. Guohui Gan, 2017. "Impacts of dynamic interactions on the predicted thermal performance of earth–air heat exchangers for preheating, cooling and ventilation of buildings," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 12(2), pages 208-223.
    2. Mathur, Anuj & Priyam, & Mathur, Sanjay & Agrawal, G.D. & Mathur, Jyotirmay, 2017. "Comparative study of straight and spiral earth air tunnel heat exchanger system operated in cooling and heating modes," Renewable Energy, Elsevier, vol. 108(C), pages 474-487.
    3. Soni, Suresh Kumar & Pandey, Mukesh & Bartaria, Vishvendra Nath, 2016. "Hybrid ground coupled heat exchanger systems for space heating/cooling applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 724-738.
    4. Gao, Jiajia & Li, Anbang & Xu, Xinhua & Gang, Wenjie & Yan, Tian, 2018. "Ground heat exchangers: Applications, technology integration and potentials for zero energy buildings," Renewable Energy, Elsevier, vol. 128(PA), pages 337-349.
    5. Gan, Guohui, 2017. "Dynamic thermal simulation of horizontal ground heat exchangers for renewable heating and ventilation of buildings," Renewable Energy, Elsevier, vol. 103(C), pages 361-371.
    6. Soni, Suresh Kumar & Pandey, Mukesh & Bartaria, Vishvendra Nath, 2015. "Ground coupled heat exchangers: A review and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 83-92.

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