Modelling and Simulation of the Solar - Biomass Base Heating System for Low Energy Buildings Developed for Rural Area

Abstract

The present paper describes one theoretical model, used for designing the optimal structure of the one heating system, developed for new or thermal rehabilitated buildings. The model can be used for evaluating of the total heat demand for the building and to the establishing the optimal structure for bioenergy value chain, where the feedstock is the biomass wood chips produced on energy willow plantations. The studied model used in this design technique is for one high efficient type boiler, which is controlled by one PLC unit, creating in this way the autonomy of the system. The paper starts with the element of biomass and bioenergy value chain presentation. The second part is focused to presenting the theoretical algorithm for designed the optimal structure of the heating system and with the establishing the fuel needs and the used marginal land area where this type of feedstock can be produced. In finally is presented the cost benefits analyses for one model for sustainable biomass feedstock production on the short rotation plantation, which can be used and implemented in rural area for supplying the principal local authorities building with heat energy, produced by sustainable technology and creating in this way the first step to energy independency of the village. In this evaluation and modelling technique one solar thermal conversion unit are integrated in order to reduce the biomass consumption with 15–30%.