Thermal performance of a matrix air heater

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Abstract
A periodic analysis of a matrix air heater has been carried out to study the capacity effect of various storage materials such as concrete, fire bricks, glass and coal. The storage effect is, however, not significant in such systems. Higher conducting and low heat capacity materials, such as iron, copper and aluminium used in the form of scraps, result in a good performance of the system. Coal is also found to give as good a performance as metallic materials. The efficiency of the system increases with increased mass flow rate but the rise in the inlet air temperature is correspondingly smaller. The temperature distribution inside the system is seen to be almost linear.

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