International Journal of Energy and Power Engineering

Volume 5, Issue 2, April 2016

  • Audit of Electricity Generation in University of Lagos, Nigeria

    Oluwatosin M. Dada, Ilesanmi A. Daniyan, Temitayo M. Azeez, Olalekan O. Adaramola

    Issue: Volume 5, Issue 2, April 2016
    Pages: 29-33
    Received: 18 November 2015
    Accepted: 29 November 2015
    Published: 21 March 2016
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    Abstract: Electricity is indispensable to a nation’s economic development. In this paper, analysis of energy sources was carried out to ascertain their costs. The selected energy alternatives are PHCN 132 kV/33 kV/11 kV Substation and Captive Cummings Diesel generator. The case study-site was University of Lagos, Akoka located within Lagos, a commercial city... Show More
  • Thermal Properties of (Na0.6K0.4)NO3 Thermal Storage System in the Solid-Solid Phase

    Halima Ibrahim ElSaeedy, Maryam Ayidh Saad Al Shahrani, Karam Fathy Abd El-Rahman, Sayed Taha Mohamed Hassan

    Issue: Volume 5, Issue 2, April 2016
    Pages: 34-38
    Received: 22 February 2016
    Accepted: 06 March 2016
    Published: 29 March 2016
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    Abstract: The thermal behaviour for the DTA, DSC and TGA measurements have been carried on the solid phase transformation for the binary eutectic mixture of 60 wt% sodium nitrate (NaNO3) and 40 wt% potassium nitrate (KNO3). Thermal energy storage materials are important for the technology that is applied to reduce cost solar thermal power generation. The NaN... Show More
  • Prandtl Number Effect of Mixed Convection Heat and Mass Transfer in a Triangular Enclosure with Heated Circular Obstacle

    Sayeda Fahmida Ferdousi, Md. Abdul Alim, Raju Chowdhury

    Issue: Volume 5, Issue 2, April 2016
    Pages: 39-47
    Received: 11 January 2016
    Accepted: 02 February 2016
    Published: 06 April 2016
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    Abstract: The effect of Prandtl number of mixed convection heat and mass transfer in a triangular enclosure with heated and concentrated circular obstacle is analyzed by solving mass, momentum, energy and concentration balance equations. The left lower middle and right upper middle walls are kept at low temperature and concentration. All others wall are assu... Show More
  • Thermal Analysis and Modelling of Thermal Storage in Solar Water Heating Systems

    Samuel Sami, Jorge Zatarain

    Issue: Volume 5, Issue 2, April 2016
    Pages: 48-59
    Received: 07 March 2016
    Accepted: 13 March 2016
    Published: 10 April 2016
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    Abstract: A numerical mathematical model has been developed to predict the thermal behavior of phase change material during thermal storage in a thermal tank. The model is based upon energy conservation equations and includes fusion of the phase change material. The thermal behavior of the phase change material during charging and discharging have been studi... Show More
  • Optical Fiber Daylighting System Featuring Alignment-Free

    Ngoc Hai Vu, Seoyong Shin

    Issue: Volume 5, Issue 2, April 2016
    Pages: 60-66
    Received: 03 May 2016
    Accepted:
    Published: 04 May 2016
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    Abstract: We present a cost-effective optical fiber daylighting system composed of prism and compound parabolic concentrator (P-CPC). Our simulation results demonstrate an optical efficiency of up to 89% when the concentration ratio of the P-CPC is fixed at 100. We have also used a simulation to determine an optimal geometric structure of P-CPCs. Because of ... Show More
  • An Environmental Value Model to Examine Recycling and Green Development in the Traditional Chinese Medicine Industry

    Zhang Haibo, Shen Yuan, Shen Junlong, Yuan Pan

    Issue: Volume 5, Issue 2, April 2016
    Pages: 67-72
    Received: 03 May 2016
    Accepted:
    Published: 04 May 2016
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    Abstract: Green development is a new model of development for China's economy to create a new normal by transforming and upgrading the TCM industry. A green TCM industry must solve the problems of three wastes because wastes generated from processing Chinese medical material (CMM) resources seriously pollutes the ecological environment and puts pressure on t... Show More
  • A Novel Technique to Design Flat Fresnel Lens with Uniform Irradiance Distribution

    Pham Thanh Tuan, Vu Ngoc Hai, Seoyong Shin

    Issue: Volume 5, Issue 2, April 2016
    Pages: 73-82
    Received: 04 May 2016
    Accepted:
    Published: 05 May 2016
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    Abstract: In this paper, we propose a novel technique to design flat Fresnel lens to achieve big concentration ratio, high uniform irradiance distribution while keeping F-number small using both refraction and total internal reflection (TIR) phenomena. Also, this method can be used to design concentrated photovoltaic (CPV) system without secondary optics len... Show More
  • Numerical Analysis of Thermosyphon Solar Water Heaters

    Samuel Sami, Edwin Marin, Jorge Rivera

    Issue: Volume 5, Issue 2, April 2016
    Pages: 83-89
    Received: 26 January 2016
    Accepted: 03 February 2016
    Published: 11 May 2016
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    Abstract: This paper presents the modeling and simulation as well as validation of a natural circulation closed thermosyphon glass tube solar collector water heater. Energy conservation equations for the heat transfer fluid flow and the storage tank were written in finite-difference form, integrated and solved to yield the characteristics of the thermosyphon... Show More