SunHorizon TPs and demosite conceptual design and simulations

The SunHorizon D2.5 1 is reporting about activities carried in T2.4 to perform preliminary conceptual design of the Technology Packages (TP) relying on dynamic TRNSYS simulation of the new heating/cooling system models. The technology packages are elaborated by the SunHorizon participants to be deployed during "WP6 Demonstration" in the 8 demo sites across Europe. As WP6 preparation activities, T2.4 is using inputs from "T2.1 Collection of demo site information" and "T6.1 Analysis of collected demo cases data for establishing demo case energy baseline" and "T2.3 KPIs based assessment methodology". The associated main objectives of T2.4 work from the SunHorizon work program are: - preliminary hydraulic layout of the new TPs to be installed in the 8 demo sites; - 8 parallel simulation threads to end up with assessment of 20% performance increase for each new TP; - thanks to dynamic TRNSYS simulation, evaluation of: o the proposed functional analysis robustness of the TPs (evaluation of realistic control approaches) o the preliminary sizes of solar field, HP, storage The main challenge of the work for the SunHorizon 18 partners involved in the 8 demo case is to achieve seamless communication and coordination within each team that works on a given demo case. The associated challenge for the partners working specifically on simulations is to define a general simulation methodology for all demo cases that allows the demo cases for specific choices and developments. The demo case simulation results will not be comparable to each other as the boundary conditions differ largely. However, sharing global approach before the modelling and simulation work is an effort to harmonize the actual methodology followed by each group in SunHorizon Innovation Action project. The work shows that all partners involved in the 8 demo case groups managed to work together and achieved agreement on preliminary design and component sizing of the 4 new TP integrated in demo site as expected by the work program. It was cross-cutting activities with WP3 until August 2019. In parallel, simulation partners started to develop the models for demo cases' building, users' consumption profiles, weather conditions thanks to inputs from "T2.1 Collection of demo site information" and "T6.1 Analysis of collected demo cases data for establishing demo case energy baseline". Afterwards these boundary conditions have been connected to the newly developed model of the TPs, including not only hydraulics but also the control of the new systems. Then the final assembly was able to issue simulation results for each demo case. As presented in the respective demo cases conclusions, thanks to the parametric simulation study performed on the components' sizes, each group made decisions about the preliminary concepts of TP integrated in the demo site currently recommended. The conclusion emphasizes that the demo case groups working in parallel had to consider different integration constraints, energy baselines, different boundaries, different primary energy coefficients or consumed non-renewable energy costs or GHG emissions contents. Therefore, it would not make sense to compare the KPIs directly from one to another demo case or TP whenever the demo case groups followed a common approach to assess the demo case performances. As the demo cases primary energy savings ranges from 24% in #7_Verviers SP to 76% in #4_Madrid and OPEX cost savings from 20.6% in #5_San Lorenço to 84.6% in #4_Madrid again, the 20% target aimed for both criteria is achieved for the 8 demo cases as expected from the work program. Looking at the baseline of the 8 demo cases shows that the performance level in energy or economic saving is largely influenced by the reference building and heating system: some demo cases shows already energy efficiency performance level for the envelope or the heating system or both while others shows poor ones. In addition, looking at systems involving photovoltaic panels, the results emphasized the influence of considering different system boundaries when including the specific electricity consumption of the whole building or only the electricity consumed by the DHW/heating/cooling system. The proposed costs estimations were derived from budget at this stage: all industry partners have shown prototype costs still, not already market oriented. In general, the cost topics like the reduction perspectives through mass production will be investigated further in WP7. In the size variation studies investigated here, similar cost have been assumed in all demo groups regarding specific TVP and DS solar collector per 1 m² installed, Ratiotherm's tank, Boostheat HP and BDR Thermea HP. However, the integration costs are different for each case to suit the demo case specific constraints. Finally, demo group partners had to adapt to variable local specific constraints and actual time schedule in real life project to achieve actual progress. It leads to different validation and completion level of the demo case preliminary concepts, and where the concept configuration presented in this report is not definitive, iterations are required or on-going within some groups until the tasks ends at M18 in March 2020. The perspectives of this T2.4 work are: o outputs to the other WP6 tasks T6.2 (detailed integration engineering) and T6.5 demonstration of actual gains again from TRNSYS simulations developed in this task T2.4 o industry partners re-use of some assessed performance figures to support pitch on their developments in SunHorizon given in the forthcoming workshops, events and communications.