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This thesis explores the feasibility and optimization of a solar-thermal sorption system mainly designed to provide cooling but also capable of heating functionalities. Through the development of a black-box model using Python programming, the study delves into the system's performance under various operation modes. Simulation results reveal the effectiveness of adaptive control strategies and pre-heating stages in optimizing efficiency, particularly in cooling modes. In heating assessments, superior performance is observed when utilizing the outdoor coil as the heat source for the heat pump. Challenges related to operational temperature bands are addressed, proposing parallel connections of the heat pump and outdoor coil to enhance performance. Future research directions include refining regression models and incorporating real-time measurement data for improved accuracy, as well as extending simulation duration for comprehensive evaluations. This study contributes valuable insights into the system’s capabilities and applications, laying the groundwork for advancements in heat-driven integrated sustainable energy systems.
Decarbonisation Strategies in Energy Systems Modelling: APV and e-tractors as Flexibility Assets
(2023)
This work presents an analysis of the impact of introducing Agrophotovoltaic technologies and electric tractors into Germany’s energy system. Agrophotovoltaics involves installing photovoltaic systems in agricultural areas, allowing for dual usage of the land for both energy generation and food production. Electric tractors, which are agricultural machinery powered by electric motors, can also function as energy storage units, providing flexibility to the grid. The analysis includes a sensitivity study to understand how the availability of agricultural land influences Agrophotovoltaic investments, followed by the examination of various scenarios that involve converting diesel tractors to electric tractors. These scenarios are based on the current CO2 emission reduction targets set by the German Government, aiming for a 65% reduction below 1990 levels by 2030 and achieving zero emissions by 2045. The results indicate that approximately 3% of available agricultural land is necessary to establish a viable energy mix in Germany. Furthermore, the expansion of electric tractors tends to reduce the overall system costs and enhances the energy-cost-efficiency of Agrophotovoltaic investments.