ABSTRACT
This chapter discusses heat gains, solar heating, solar azimuth angle, sun angles, and admittance factor. The values of incident radiation so far obtained provide an estimate of the quantity of heat incident upon the outside surface of a structure. Not all this heat, however, is transmitted to the inside of the building; some is reflected or absorbed by the glass. The thermal capacity of the building fabric also has an important effect on solar heat gains. The heat gain consists of sensible heat due to radiation and convection from the body, and latent heat gain due to respiration and the evaporation of moisture from the skin. Solar collectors may be sited on the roof of a building and used to reduce the cost of providing hot water, or for space heating. One of the more viable applications of solar-energy utilisation in the UK is the heating of swimming pools, especially those that are only in use during the summer months.
