Solar & Pellet Heating: Specifications for High Efficiency System Design
Abstract
Combined biomass and solar heating systems provide the opportunity for a heat supply of single family houses without the use of fossil energy. Pellet fired boilers play a predominant role within these systems because their standardised combustible allows for the fully automated operation. However, the combination of biomass boilers and solar collectors places special requirements in view of a good system solution. To analyse the proper combination of both technologies three separate projects were carried out at SPF. the main instrument thereby was the Concise Cycle Test method supplemented by preliminary tests of the boiler and subsequent simulations. It was shown that a modulating boiler operation is superior in terms of both, high energetic efficiency and low emissions compared to intermitting boiler operation. But this is only the case if the following requirements are met: