American Journal of Energy Engineering

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Volume 2, Issue 5, September 2014

  • Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump

    Jalaluddin, Akio Miyara

    Issue: Volume 2, Issue 5, September 2014
    Pages: 103-107
    Received: 13 September 2014
    Accepted: 30 September 2014
    Published: 10 October 2014
    DOI: 10.11648/j.ajee.20140205.11
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    Abstract: The present study aims to investigate the performance of multiple-tube ground heat exchangers (GHEs). The multiple-tube GHEs with a number of pipes installed inside the borehole were simulated. Thermal interferences between the pipes and performance of multiple-tube GHEs are discussed. Increasing the number of inlet tube in the borehole increases t... Show More
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  • Single and Multicomponent Droplet Models for Spray Applications

    Shah Shahood Alam, Ahtisham Ahmad Nizami, Tariq Aziz

    Issue: Volume 2, Issue 5, September 2014
    Pages: 108-126
    Received: 16 October 2014
    Accepted: 24 October 2014
    Published: 10 November 2014
    DOI: 10.11648/j.ajee.20140205.12
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    Abstract: An unsteady, spherically symmetric, single component, diffusion controlled gas phase droplet combustion model was developed first, by solving numerically the time dependent equations of energy and species. Results indicated that flame to droplet diameter ratio (flame standoff ratio) increased throughout the droplet burning period, its value being m... Show More
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