Suitability of differently designed small DHW low flow solar heating systems

摘要

Small low flow solar heating systems for domestic hot water supply has higher thermal performances than similar traditional solar heating systems. The main reason for the high thermal performance of low flow systems is the large advantageous thermal stratification which is built up in the heat storage during operation of the solar collectors. Therefore the design of the heat storage is of great importance for the thermal advantage of low flow systems. Side-by-side experiments with three small low flow solar heating systems for domestic hot water supply have been carried out during 1992. The results of these investigations are presented and the optimum heat storage design determined by means of calculations, tests and cost estimates. (au).