โ Scribed by K.R. Rao; Prakash Chandra
No coin nor oath required. For personal study only.
This paper deals with a study of the thermal performance of hollow blocks of different designs and types of concrete, by a two dimensional R-C network analogue method. Steady and periodic thermal characteristics of solid and concrete hollow blocks, along with those of solid and cavity brick wall sections, are presented. The thermal performance of the concrete hollow block wall sections, exposed to a typical summer sol-air temperature diurnal cycle, has been evaluated both for conditioned and unconditioned situations. The hourly variation of heat flow rates and inside surface temperatures of the hollow block sections were compared with those of the solid and cavity brick walls. This study brings out the fact that the widely used hollow block design with two large air spaces is not thermally efficient under tropical climates. Their thermal performance can, however, be improved considerably and be made acceptable by adopting a design with four air spaces arranged in two rows.
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