Feasibility Study of Seasonal Thermal Storage in Solar Heating Systems for Southern Climates

摘要

Numerical computer simulations of solar district heating plants with seasonal thermal storage for Tashkent conditions is discussed. A water pit is considered as the storage medium. The effects of different collector absorber surface types and of water pit top thermal insulation are investigated. Optimum relationships between collector area and storage volume are presented. It is shown that in southern climates a solar fraction of 50-60% can be achieved at lowest solar component cost for a central solar heating plant with seasonal thermal storage. A short review of the various basic concepts for seasonal thermal storage is also presented.