Modelling and Preliminary Evaluation of Energy Savings for a SHC Plant in a Real Application: Misericordia of Badia a Ripoli
Abstract
Until today, there is a lack in the global market of small scale units, fully automated and autonomous package-solutions for residential and light commercial or industrial applications, low temperature cooling systems. Within the FP7-ALONE project, financed by the EU, the Department of Energy Engineering “S.Stecco” is responsible for the installation of an Solar Heating&Coolinf (SHC) plant in a real application at the Misericordia of Badia a Ripoli (Florence). For the optimized design of the SHC plant a key-point have been the analysis of the building and of the already existing air-conditioning system that allowed to evaluate potentialities for the coupling of the solar plant with the specific real application. Another key-point have been the preliminary evaluation of the energy loads of the building: dynamic models have been developed in TRNBuild , in order to make a sensitivity analysis of loads depending on temperature, relative humidity and gains. The last step for the optimized design was the development in TRNsys of a complete dynamic simulation model that implemented the design idea for the coupling of the SHC plant to the main building. A sensitivity analysis of the energy savings have been carried out depending on the thermodynamic conditions and on air mass-flows: the SHC plant operative ranges have been optimized in order to maximize the energy savings.