Refine
Document Type
- Master's Thesis (3) (remove)
Language
- English (3) (remove)
Has Fulltext
- yes (3)
Is part of the Bibliography
- no (3)
Keywords
- Adsorption chiller (1)
- Agrophotovoltaics (1)
- Black-box modeling (1)
- CCS (1)
- Cement Industry (1)
- Electric Tractors (1)
- Elektrofahrzeug (1)
- Energiespeicherung (1)
- Energiesystem (1)
- Energy System Model (1)
- Energy Transition (1)
- Evacuated tube solar collector (1)
- Fotovoltaik (1)
- Kosten (1)
- Kostenrechnung (1)
- Landwirtschaft (1)
- Oxyfuel (1)
- Python simulation (1)
- Regression model (1)
- Reversible heat pump (1)
- Simulation (1)
- Sorption (1)
- TCO (1)
- Total Cost of Ownership (1)
- Wärmepumpe (1)
- Zement (1)
Institute
Open Access
- Diamond (3) (remove)
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.
Total Cost of Ownership (TCO) is a key tool to have a complete understanding of the costs associated with an investment, as it allows to analyze not only the initial acquisition costs, but also the long-term costs related to operation, maintenance, depreciation, and other factors. In the context of the cement industry, TCO is especially important due to the complexity of the production processes and the wide variety of components and machinery involved in the process.
For this reason, a TCO analysis for the cement industry has been conducted in this study, with the objective of showing the different components of the cost of production. This analysis will allow the reader to gain knowledge about these costs, in the industrial model will be to make informed decisions on the adoption of technologies and practices that will allow them to reduce costs in the long run and improve their operational efficiency.
In particular, this study pursues to give visibility to technologies and practices that enable the reduction of carbon emissions in cement production, thus contributing to the sustainability of industry and the protection of the environment. By being at the forefront of sustainability issues, the cement industry can contribute to the achievement of environmentally friendly technologies and enable the development of people and industry.
The Oxyfuel technology has been selected as a carbon capture solution for the cement industry due to its practical application, low costs, and practical adaptation to non-capture processes. The adoption of this technology allows for a significant reduction in CO2 emissions, which is a crucial factor in achieving sustainability in the cement manufacturing process.
Carbon capture storage technologies represent a high investment, although these technologies increase the cost of production, the application of Oxyfuel technology is one of the most economically viable as the cheapest technology per capture according to the comparison. However, this price increase is a technical advantage as the carbon capture efficiency of this technology reaches 90%. This level of efficiency leads to a decrease in taxes for the generation of CO2 emissions, making the cement manufacturing process sustainable.