Nigerian Journal of Technology

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Hybrid Cooling System for Industrial Application

CI Ezekwe


A hybrid cooling System was constructed and tested for glass-ware and plastic-ware production. The unit utilizes water-in-air stream to cool molds in glass and plastic forming processes. The rate of heat transfer between the mold surface and the two component two-phase stream was increased more than five times over that achieved by using the gas (air) phase alone. The enhanced cooling rate yielded speed increase in production by about 65%. The system also reduced the level of noise due to air blast at the press by limiting the use of compressed air. This cooling unit could also be used in iron and steel industries.

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