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World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

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I. O. Ofondu*, B. N. Ugwu and R. O. Chime


Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic material, a natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin that resists compression. Wood is sometimes the secondary xylem in the stems of trees, or it is more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs. In a living tree it performs a support function, enabling woody plants grow large or to stand up by themselves. Refrigeration is a process of removing heat from a low-temperature reservoir and transferring it to a hightemperature reservoir. The work of heat transfer is traditionally driven by mechanical means, but can also be driven by heat, magnetism, electricity, laser, or other means. A refrigeration system with an insulator case is an energy efficient system that reduces the energy loss in a system through convention and conduction. The insulating materials considered are locally available woods, wallboard, fiberglass and cork. The scope of this project are to design and test local wood thermal conductivity for insulation materials. The thermal conductivity of the insulating materials was tested and recorded while a comparison of the literature material with the least thermal conductivity wood was used for the casing of the refrigerator unit. The refrigeration temperature of -10C to – 50C will be maintained for a long time thereby retaining the temperature for a long duration even after a long period of power outage. All the local woods tensile property was tested using tensile machine to achieve structural stability and at the same time maintain the refrigeration temperature of -1 0C – 50 C. Software was used in designing of the system. Design is a process, an activity, and not only the results of that activity.

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