The 12th edition of the International Conference on Solar Energy for Buildings and Industry, EUROSUN 2018, was hosted by HSR, the University of Applied Science Rapperswil. It was a forum for scientists, engineers, architects, and representatives from industry and business to present and discuss their latest findings, developments and perspectives.
Two presentations were given by Task 56 Experts at the EUROSUN 2018 conference.
Further reading also in the latest Solar Update 2018-10.
Definition of a Reference Office Building for Simulation Based Evaluation of Solar Envelope Systems
Presented by: Matteo D'Antoni, EURAC Research, Italy
Abstract - Solar Envelope systems, which represent the technological response for meeting aesthetic requirements and solar renewable energy exploitation on building façades, are gaining a rising attention. However, they are still rare on the market. IEA SHC Task 56 focuses on the critical analysis, simulation, laboratory tests and onsite monitoring of market available and near market Solar Envelope systems. Within this framework, reference boundary conditions are required in order to assess the performance of Solar Envelope systems and compare different technologies through numerical simulations. The present paper reviews the process of defining reference boundary conditions for an office building, listing possible simplifications and required assumptions in order to calculate the impact at whole building level in terms of useful and final energy savings related to the installation of a façade integrated technology. The paper concludes with a comparison of simulation results between TRNSYS and DALEC, a simplified concept evaluation tool, which performs combined thermal and lighting analysis already at early design stages.
Authors: D´Antoni, M., Geisler-Moroder, D., Bonato, P., Ochs, F., Magni, M., De Vries, S.B., Loonen, R.C.G.M., Fedrizzi, F.
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Potential of covering electricity needs of a flat of a MFH with decentral compact heat pumps with PV – Simulation study for different DHW profiles and PV field sizes
Presented by: Toni Calabrese, Innsbruck University, Austria
Abstract - Heat pumps in combination with PV are discussed as one of the key technologies in a future sustainable energy system. A simulation study of a flat in a multi-familiy-house (MFH) with decentral compact heat pumps and with a photovoltaic (PV) field was performed in the CARNOT/Simulink simulation environment in order to evaluate the potential to reduce the purchased grid electricity. PV electricity is self-consumed covering electric power requests for heating, ventilation, appliances and Domestic Hot Water (DHW) preparation. Three different electric power profiles for DHW preparation and two PV fields (roof, roof and façade) were analysed.The results of the simulations show that just a small percentage (below 26%) of electricity demand can be covered from PV field energy. The installation of a PV field also on the façade of the flat does not reduce significantly the purchased electricity (-11% in best of cases), while the use of daily electric storage could be evaluated to decrease further the purchased electricity (maximum reduction of -27%). The use of annual primary energy factor instead of monthly values overestimates the reduction of primary energy demand in all cases compared to the case without photovoltaic system.
Authors: Toni Calabrese, Fabian Ochs, Dietmar Siegele and Georgios Dermentzis
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