New Calculation Methodology for Solar Thermal Systems

Spain has been one of the first countries worldwide to develop a legal framework that aims to fully develop the potential of the solar thermal systems for DHW in the residential building sector. Given the lack of references and the complexity of the building sector, several problems have arisen as the application in practice has showed more difficulties than expected. One of the problems detected it’s been the lack of standardization of sizing methodologies among the installers and engineers; to solve this, the administration has made a big effort to generate a precise and simple sizing method for all the actors in the sector. This paper describes the work carried out to generate that methodology.