COMPARATIVE STUDY OF THERMAL TRANSPORT IN ZEA MAYS STRAW AND ZEA MAYS HEARTWOOD (CORK) BOARDS

Abstract

Thermal conductivity values at the temperature of 301-303K have been measured for Zea mays straw board as well as Zea mays heartwood (cork) board. Comparative study of the thermal conductivity values of the boards reveal that Zea mays heartwood board has a lower thermal conductivity value to that of the straw board. The study also shows that the straw board is denser than the heartwood board. Specific heat capacity value is less in value for the heartwood board than the straw board. These parameters also affect the thermal diffusivity as well as thermal absorptivity values for the two types of boards. The result favours the two boards as thermal insulators for thermal envelop but with heartwood board as a preferred insulation material than the straw board.

Keywords

Dates

  • Submission Date2008-05-29
  • Revision Date2008-09-03
  • Acceptance Date2008-10-01

DOI Reference

10.2298/TSCI1001031E

References

  1. ***, United States of America Forest Products Laboratory Wood Handbook: Wood as an Engineering Material, US Government Printing Office, Washington, USA, 1974
  2. Etukudo, I. E., Forest Our Divine Treasure, Dorand Publishers, Uyo, Nigeria, 2000
  3. Umoren, S. A., Ajibesin, K. K., Bala, D. N., Physio-Chemical Properties of the Seed and Oil of Hura Prepitans, Journal of Natural and Applied Sciences, 1 (2000), 2, pp. 23-26
  4. Odoemena, C. S. I., et al., Phytochemical Study and Nutritive Potential of Afrofritoma Sylevestris Leaf, Nig. J. Nat. Product and Med., 6 (2002), pp. 42-44
  5. Null, G., The Complete Encyclopedia of Natural Healing, Bottom Line Books, Stamford, Conn., USA, 2004
  6. Beck, A., Heinemann, M., Fricke, J., Thermal Transport in Straw Insulation, Journal of Thermal Env. and BLdg. Sci., 27 (2004), 3, pp. 227-234
  7. Steen, A., Steen, B., The Beauty of Straw Bale Homes, Green Publishing Co., Chelsea, Vt., USA, 2000
  8. Nails, A., Information Guide to Straw Bale Buildings, Report No. 0L148RJ, Hollinroyd Farm, Lancashire, UK, 2001
  9. Commins, T., R-Value of Straw Bales Lower than Previously Reported, California Energy Commission.URL www.buildinggreen.com/news/r-values.cfn
  10. Claus, E. P., Tyler, V. E., Bardy, L. R., Pharmacognosy, 6th ed., Lea and Febiger, Philadelphia, Penn., USA, 1970
  11. Etukudo, I. E., Enthnobotany Conventional and Traditional Uses of Plants, Vol. 1, Verdict Press, Uyo, Nigeria, 2003
  12. Fricke, J., Materials Research for the Optimization of Thermal Insulation, High Temperature -High Pressure, 25 (1993), 4, pp. 379-390
  13. Silva, T. S., et al., Thermal Diffusivity of Lead Iodide, Journal of Applied Physics, 83 (1998), 11, pp. 6193-6195
  14. Adeosun, B. F., Olaofe, O., Thermodynamic Parameters of Stretching and Thermal Conductivity of Loaded Natural Rubber, J. Chem. Soc Nigeria, 27 (2002), 2, pp. 128-129
  15. Jackson, R. D., Taylor, S. A., Heat Transfer Method of Soil Analysis, Agronomy Monograph, 9 (1965), 1, pp. 349-360
  16. Walton, J. A., Woodwork in Theory and Practice, 4th ed., Australian Publishing Co., Sydney, Australia, 1970
  17. Okeke, P. N., et al., Preliminary Practical Physics Manual, Nigerian University Physics Series, Vol. 2, Africana - FEP Publishers Limited, Onitsha, Nigeria, 1991
  18. Ekpe, S. D., Akpabio, L. E., Eno, E. E., Thermal Properties of Soil Samples in Uyo Local Government Area of Akwa Ibom State, Nigeria, Global J. of Pure and Appl. Sc., 2 (1996) 1, pp. 45-52
  19. Liebe, J. D., et al., Heat Diffusivity of Nd1-xSrxMnO3-s and La1-x CaxMnO3-s Compounds, Journal of Applied Physics, 83 (1998), 11, pp. 7148-7150
  20. Khatry, A. B., Sodha, M. S., Malik, M. A., S., Periodic Variation of Ground Temperature with Depth, Solar energy, 30 (1978), 1, pp. 425-427
  21. Sodha, M. S., et al., Periodic Heat Transfer with Temperature Dependent Thermal Conductivity, Int. J. Heat Mass Transfer, 22 (1997), 1, pp. 777-781
  22. Diamant, R. M. E., Thermal and Acoustic Insulation, Butterworth's, London, 1986
  23. Kimani, J. N., Aduda, B. O., Temperature Dependence of the Thermal Conductivity of a Grog, Modified Kenya Kaolinite Refactory, African Journal of Science and Technology, Science and Engineering Series, 5 (2004), 1, pp. 6-14
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