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WP7 - Simulation (Deliverable 7.2)

The full report is confidential and will not be distributed to the public. However, a brief summary of the contents are given here.

This report describes the framework for the simulations of breakthroughs and cost analysis within phase 2 of the MacSheep project. This framework consists of: definition of performance figures, costs, cost effectiveness, boundary conditions as well as reference benchmark systems. This report also summarizes the breakthrough simulation results of the individual work packages (WP3 - WP6) and gives an overview on the breakthroughs that have been selected to be developed into real components in phase 3 of the MacSheep project.

Two different benchmark solar assisted heat pump systems have been defined and implemented in the system simulation software TRNSYS 17: one with an air source heat pump (ASHP) and one with a ground source heat pump (GSHP). The control of the heat pump in these two systems is different as the GSHP has fixed speed while the heat pump in the ASHP system uses variable speed for the compressor. The definition of the systems also includes definitions of the sizes of collector, store, borehole, heat pump power etc. These two systems have been simulated for the reference conditions defined for the project of two climates (Zurich and Carcassonne) and for two buildings with different heat loads. The combination of Zurich climate and the lower heat load building has been chosen as the main reference boundary conditions for comparison of breakthroughs in this phase of the MacSheep project.

Performance figures SPFSHP+ (seasonal performance factor of the system) and Wel,SHP+ (total electric energy demand) have been defined as well as cost figures for the complete system installed. Appropriate measures were taken to ensure that the same space heat (indoor temperature) and DHW comfort is provided by all simulated systems. Finally two cost effectiveness figures have been defined for reporting results based on difference in the simulated performance and difference of cost between the system that includes a breakthrough component and the corresponding benchmark system.

In total 43 breakthroughs have been studied using 131 different individual variations. This has resulted in only relatively few that have been shown to have both significant energy and cost savings. However, there are many more that have been shown to have either significant energy or cost savings, and several of these have been chosen to be further developed in phase 3. This means that in total 20 breakthroughs will be further developed in phase 3.



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