International Journal of Sustainable and Green Energy

Volume 6, Issue 5, September 2017

  • Numerical Optimization of Double Tube GHE for Ground Source Heat Pump

    Md. Hasan Ali, Akio Miyara, Keishi Kariya

    Issue: Volume 6, Issue 5, September 2017
    Pages: 64-75
    Received: 29 July 2017
    Accepted: 7 August 2017
    Published: 23 August 2017
    Abstract: In this paper, a two-dimensional axisymmetric numerical simulation model was developed for optimization of double (coaxial) tube vertical ground heat exchangers (GHEs) in cooling mode. Details of the heat transfer rates and pressure drops for each model are presented and analyzed. The results of the numerical study of optimization of double tube ve... Show More
  • Examining Whether Smart Meters Have Been Used Smartly: A Case Study of Residential Electricity Customers in Vermont

    Qingbin Wang, Samantha Lewandowski

    Issue: Volume 6, Issue 5, September 2017
    Pages: 76-83
    Received: 10 July 2017
    Accepted: 26 July 2017
    Published: 16 October 2017
    Abstract: Approximately 92% of electricity meters in Vermont, and more than 40% across the United States, have been replaced with smart meters due to their potential to improve grid efficiency and reduce electricity costs, but there is very limited information on whether smart meters are benefitting or being efficiently used by electricity customers. In this... Show More
  • Anaerobic Digestion of Slaughterhouse Wastewater for Methane Recovery and Treatability

    Zemene Worku, Seyoum Leta

    Issue: Volume 6, Issue 5, September 2017
    Pages: 84-92
    Received: 9 September 2017
    Accepted: 22 September 2017
    Published: 30 October 2017
    Abstract: The objective of this investigation was to optimize and evaluate the bioenergy production potential and COD removal efficiency of a semi-continuous anaerobic digester from slaughterhouse wastewater. The performance of the pilot scale anaerobic digester was evaluated at the OLRs of 0.32, 0.51, 1.16 and 2.31 kg m−3day−1 under mesophilic environmental... Show More