Passive Solar

PASSIVE SOLAR INTRODUCTION Passive solar is a “GREEN BUILDING “technique, which depends on natural convection process rather than mechanical transmitting source, which captures the heat energy of sun and delivers it during winter and pumps out the heat in summer, using heat distribution methods. Some of the heat distribution methods are Convection, Conduction, and Radiation. However components of passive solar heating are, the aperture area of the house, absorber area of the house, thermal mass of the house, heat distribution, and solar control. When these components work together it contributes to an efficient green building. In passive solar technique, glazing plays a vital role in absorption, transmission and distribution of solar radiations, moreover placing large windows in south side it increases the absorption of solar radiation, which will be essential during winter. The radiation getting in through the glazing is absorbed by concrete or masonry walls, stone floor slabs etc. These materials help in increasing absorption, density and have high specific heat capacity. This high energy heat is stored or retained by thermal mass of the material, which therefore transmits the heat absorbed when needed. There are four types of passive solar technique: suntempered, direct gain, indirect gain and isolated gain. Direct gain technique is very popular in residential applications, sun-tempered is used to provide valuable amenity to homes and thermal storage walls are used to support night-time heating. Passive solar heating method is adopted in cold zones for keeping the building to be warm and cold when needed by natural process. The supremacy of this method are, less installation cost, maintenance cost, no greenhouse gas emission and the most desirable feature is that, it almost reduces 50% of house heating bills. MODEL DESCRIPTION The model selected for the analysis is “Base case model of two offices and a passageway action”. The model comprises of three zones they