GEOFIT D4.2 Modular flow sheet simulation of the HP systems

The deliverable D4.2 reports about the activities performed within Task 4.2, about the development of dynamic models of the different heat pump technologies being developed and tested within the GEOFIT project. Both electrically driven and gas driven heat pumps models are implemented in the commercial software Dymola, based on the Modelica language, thanks to its high flexibility and standard components library availability. The developed models are based on thermodynamic properties of the refrigerants and adsorbent material as well as heat transfer efficiency of different components. Different boundary conditions are simulated to consider both the thermal load variability as well as the geothermal source. The activities presented in this report have been focused on : o Identification of the best electrically driven compression heat pump configuration, given the boundary constraints of the GEOFIT demo sites for retrofitting applications; o Identification of possible control strategies for the hybrid gas driven adsorption heat pump, to optimize the operation, matching the temperature to deliver to the user. The structure of the deliverable is as follows: o Section 2: Investigated configurations of the two heat pumps technologies are introduced and described in details, with regards to their main features and possible operating conditions; o Section 3: Possibilities of model integration with the reference buildings are discussed; o Section 4: Methodology for the model implementation and the expected outcomes is presented; o Section 5: Models developed are deeply described and the implementation is introduced; o Section 6: Main simulation results, in terms of optimal configuration as well as possible control strategies are reported and discussed; o Section 7: Conclusions and impacts to the following GEOFIT activities are described