Thermal performance of a south facing wall as solar collector storage system

摘要

AbstractThis paper illustrates an analysis of the performance of a solar wall as a collector storage system. the south facing wall consists of a mass of concrete/brick whose one surface is blackened and glazed, and a network of pipes (metallic or plastic) is laid in a plane from which heat can be extracted by flow of fluid in such a manner that the temperature of the plane of heat retrieval keeps constant. the collection efficiency of the system is found to be 80·0 and 60·7 per cent for collection temperatures 20 and 25°C respectively on the surface; the maxima/minima of the rate of heat retrieval (Q(t)) occurs about 12 h after the maxima/minima of solar temperature at a depth of the plane of heat retrieval = π/α1, with a maximum efficiency of 2