International Journal of Energy Research

Cover image for Vol. 37 Issue 9

July 2013

Volume 37, Issue 9

Pages 991–1140

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Technical Notes
    1. Water management in a passive direct methanol fuel cell (pages 991–1001)

      Vânia B. Oliveira, Daniela S. Falcão, Carmen M. Rangel and Alexandra M. F. R. Pinto

      Article first published online: 24 FEB 2012 | DOI: 10.1002/er.2902

    2. Liquid hydrocarbon fuels from fish oil industrial residues by catalytic cracking (pages 1036–1043)

      Nadia Mrad, Maria Paraschiv, Fethi Aloui, Edwin Geo Varuvel, Mohand Tazerout and Sassi Ben Nasrallah

      Article first published online: 11 MAR 2012 | DOI: 10.1002/er.2906

      Thumbnail image of graphical abstract

      The present work is to derive the biofuel from fish oil industrial residues by catalytic thermal cracking. To evaluate the higher biofuel yield with low acid value, the operating conditions of temperature range and heating rate with different catalysts were optimized. The lowest acid value of 8.75 mgKOH/goil with the biofuel yield of 68.1 % was derived with a heating rate of 10 ° C/min at the cracking temperature of 500 °C using Na2CO3/MgSO4 as catalyst. It is further reduced to 0.36 mgKOH/goil using Na2CO3 as an absorbent.

    3. Experimental and numerical investigation of thermal characteristics of a novel concentric type tube heat exchanger with turbulators (pages 1088–1102)

      Hacı Mehmet Şahin, Eşref Baysal and Ali Rıza Dal

      Article first published online: 17 MAY 2012 | DOI: 10.1002/er.2919

      Thumbnail image of graphical abstract

      The heat transfer performance and friction characteristics of a novel concentric tube heat exchanger with different pitches of helical turbulators were investigated experimentally and numerically. A good agreement between the experimental and numerical results and an effective enhancement of heat transfer performance were obtained using the novel helical turbulators. The new correlations for turbulent forced convection were proposed for Reynolds number range from 3 000 to 14 000.

    4. Increase of power output by change of ion transport direction in a plant microbial fuel cell (pages 1103–1111)

      Ruud A. Timmers, David P.B.T.B. Strik, Hubertus V.M. Hamelers and Cees J.N. Buisman

      Article first published online: 1 OCT 2012 | DOI: 10.1002/er.2957

      Thumbnail image of graphical abstract

      Increase in power density by changing cation transport direction. The initial situation is cathode 1 before the change, after the change of transport direction the cell potential increased. The increase in cell potential resulted in an increase of power output 398 % for the PMFC.

  2. Technical Notes

    1. Top of page
    2. Research Articles
    3. Technical Notes
    1. Exergetic efficiency of high-temperature-lift chemical heat pump (CHP) based on CaO/CO2 and CaO/H2O working pairs (pages 1122–1131)

      Mehdi Arjmand, Longcheng Liu and Ivars Neretnieks

      Article first published online: 2 MAY 2012 | DOI: 10.1002/er.2918

      Thumbnail image of graphical abstract

      A chemical heat pump (CHP) uses a reversible chemical reaction to upgrade or degrade heat depending on the mode of operation. An exergetic efficiency model for a CHP operating in the temperature-level amplification mode has been developed. The exergetic efficiency increases with increase in task, TH, decrease in heat source, TM, and increase in condenser, TL, temperatures.

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