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http://hdl.handle.net/11422/17431| Type: | Trabalho de conclusão de graduação |
| Title: | Technical and economic assessment of the integration of refrigeration concepts into the proceeding extension of solar energy systems in Brazil |
| Other Titles: | Avaliação técnica e econômica da integração de conceitos de refrigeração para a extensão anterior de sistemas de energia solar no Brasil |
| Author(s)/Inventor(s): | Wiencke, Christopher |
| Advisor: | Ávila, Giovani Manso |
| Co-advisor: | Biek, Katja |
| Abstract: | In wide parts of our planet is a lot of electrical energy used for refrigeration technique to accomplish a comfortable environment and also to cool necessary machines, which were surrounding us. Global warming, desertification and the expanding of the tropic belt causing a high raising demand of cold worldwide. The use of solar-assisted air-conditioning is very meaningful, especially in warm, subtropical regions with a high solar radiation. In this connection the radiation rate is extensive according to the refrigeration demand. The solar cooling provides a significant potential of an electrical energy reduction for air-conditioning in buildings, arranges fossil fuel savings and decreases peak demands of electrical energy. Furthermore solar cooling decreases the ecological footprint of tropical cities due to achieving carbon emission reduction and using environmental friendly refrigerants. The solar array yields thermal load reduction of the building. Last but not least it impacts in a positive way the urban microclimate through absorbing the solar irradiation on the roof. The intention of this project is to analyze which factors have an influence in the adequate selection of system components of a solar-assisted cooling system for an energy efficient refrigeration of buildings. This paper contains the most important processes for solar-assisted cold generation and is organized into the following main chapters: The second chapter comments on the current state of the art in the field of solar cooling. Different technologies in terms of varying climatic conditions are critically probed. The section describes the fundamental aspects and components of solarassisted air-conditioning in buildings, the function and the benefits. It includes also non-thermally driven applications like conventional electricity driven vapor compression chillers and a photovoltaic driven compression cycle. Summarized it gives the reader an overview of the latest scientific knowledge. In chapter three there will be a comparison of the different cooling systems overworked. Based on an energetic building analysis of an existing elementary school in Rio de Janeiro is shown in which way solar-assisted air-conditioning is an energy efficient alternative to conventional electrical driven compressor systems. Therefore the solar coverage ratio will be calculated by using the software HVAC Load for the investigation of the cooling load. The calculated cooling demand gives the basis for the design of different refrigeration systems by using solar energy. A list of the necessary devices, the estimated installation and the calculated operation costs will give the requirement for an ecological and economic assessment and the repayment of the investment. The fourth chapter demonstrates the achieved results and presents the conclusions. In this context the following questions will be merged and answered in the course of this work: Which techniques can be used and obtained? Which is the most efficient system for the respective requirements? What is the correlation between solar gain and cooling demand? Which solar arrays provide the highest cost-efficiency? How to reduce the refrigeration demand hence the cooling capacity and investment costs of solar cooling system? Which auxiliary energy can be installed and what is the selection criterion? Can solar-assisted cooling systems compete economically against conventional compressor controlled systems? |
| Keywords: | Technical and Economic Assessment Assisted Refrigeration Concepts |
| Subject CNPq: | CNPQ::ENGENHARIAS |
| Production unit: | Escola Politécnica |
| Publisher: | Universidade Federal do Rio de Janeiro |
| Issue Date: | Sep-2016 |
| Publisher country: | Brasil |
| Language: | eng |
| Right access: | Acesso Aberto |
| Appears in Collections: | Engenharia Ambiental |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| monopoli10018743.pdf | 2.16 MB | Adobe PDF | View/Open |
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