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Abstract
As PV is considered prospective for decarbonizing the building sector, the self-consumption of on-site PV generation, which is susceptible to the temporal mismatch between solar radiation and energy demand, greatly affects the overall performance of improving building autonomy. As an important way to lessen the dependence of the decentralized PV energy system on the grid, internal flexibility from buildings is receiving increasing attention. This research sought to contribute to our understanding of the flexibility potential of Building Thermal Mass (BTM). In this aim, the load-shifting potential of BTM and the impacts on the self-consumption of rooftop PV generation were evaluated in a single-family residential building. To ensure a satisfying accuracy, this research proposed a novel framework that integrates multi-agent system and resistance-capacitance modelling techniques. The proposed methods represent the thermal network by means of circuit analogy and perform indoor thermal control based on stochastic occupant behaviours and appliance usage. The proposed BTM modelling framework is of great potential in flexibility estimation of BTM and could be used to assist the demand-side management.
Highlights
The building sector accounts for approximately one third of the total energy consumption worldwide and has been identified as an important sector to reduce carbon emission
As PV is considered prospective for decarbonizing the building sector, the selfconsumption of on-site PV generation, which is susceptible to the temporal mismatch between solar radiation and energy demand, greatly affects the overall performance of improving building autonomy
The Multi-Agent System (MAS) model was simulated for 4 days and the results from the last day was used, for the purpose of stabilizing the Building Thermal Mass (BTM) temperature
Summary
The building sector accounts for approximately one third of the total energy consumption worldwide and has been identified as an important sector to reduce carbon emission. The prosumers with RPVs usually claim energy autonomy as the on-site PV generation exceeding the building demand and rely on the external flexibilities to bridge the temporal mismatch between generation and demand [2]. They utilize the electricity infrastructure even more than traditional power users, and may contribute more to the peak effects in the grid [3]. For the equity and security of the electricity grid, the prosumers should improve the self-consumption of RPV generation as much as possible [4]
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