Optimising the Temperature of Heat Storage to Serve Processes with Varying Supply and Demand - Captured Solar Energy Curve

摘要

This work focuses on maximising the utilisation of solar thermal energy. The amount ofrnenergy supplied from solar radiation depends on the weather conditions, the availablernarea and on the capture temperature. The weather conditions are difficult to account for.rnHowever, the collectors’ area and temperature are design parameters. Usually there is anrnupper limit on the area of the collectors, both by available space and the cost. Itrndetermines the maximum energy that can be captured at different temperatures. Thernstorage temperature should be the lowest possible to ensure maximum solar heat capturernand minimum losses to the ambient. The resulting temperature level is determined by arntrade off between the temperature levels of the process demands and the solar supplyrntemperature. The higher is the temperature of the capture, the lower is the efficiency ofrnthe storage system and the amount of heat captured. Too low storage temperature mayrnresult in infeasibility of the heat transfer to processes. By constructing the MinimalrnCapture Temperature Curve (MCTC) and the Captured Solar Energy Curve (CSEC) thernmost favourable temperature of the storage and capture of energy from solar source isrndetermined using simple targeting techniques.