In this work is presented the project named ESTATE-Lab, sponsored by CRS4, RTM Spa, SAPIO Srl, Sardegna Ricerche and the departments of Mechanical Engineering and Electrical and Electronic Engineering of the University of Cagliari and funded by MIUR through the law L297/99. The objective of the project ESTATE-Lab is the building of a "public-private laboratory for the development of technologies for solar thermal energy at high temperature." The project focuses on some research and development activities aimed to "demonstrate the feasibility of efficient production, clean and competitive electricity from solar energy, through the thermodynamic management at high temperature (550 °C) of solar energy which is collected, concentrated and stored.". The lab will allow to conduct research and development activities on solar thermodynamic exploring innovative solutions than the commonly used technologies. In particular, the project ESTATE-Lab consists of three lines of solar collectors of parabolic trough type where the carbon dioxide is used as operating fluid. The use of a working fluid in gaseous state will allow to achieve higher temperatures (550 °C) than those normally taken in the thermodynamic solar plants built to date. Moreover, in the project ESTATE-Lab, is present a section of accumulation of thermal energy which is based on heat exchange between carbon dioxide and solid materials at high heat capacity. This mode of storage allows the management of heat accumulated by means of the evolution of temperature profile (thermocline). In this work, in addition to the description of the laboratory, are also presented the models of simulation used to assess the performance of the plant and the results of comparative studies that led to the choice of carbon dioxide as working fluid. In addition, also the simulation results of the section of heat accumulation in different conditions of solar radiation are reported.
Il progetto ESTATE-Lab: un impianto solare termodinamico operante con fluidi termovettori gassosi ad alta temperatura
CASCETTA, MARIO;CAU, GIORGIO;COCCO, DANIELE;PUDDU, PIERPAOLO
2009-01-01
Abstract
In this work is presented the project named ESTATE-Lab, sponsored by CRS4, RTM Spa, SAPIO Srl, Sardegna Ricerche and the departments of Mechanical Engineering and Electrical and Electronic Engineering of the University of Cagliari and funded by MIUR through the law L297/99. The objective of the project ESTATE-Lab is the building of a "public-private laboratory for the development of technologies for solar thermal energy at high temperature." The project focuses on some research and development activities aimed to "demonstrate the feasibility of efficient production, clean and competitive electricity from solar energy, through the thermodynamic management at high temperature (550 °C) of solar energy which is collected, concentrated and stored.". The lab will allow to conduct research and development activities on solar thermodynamic exploring innovative solutions than the commonly used technologies. In particular, the project ESTATE-Lab consists of three lines of solar collectors of parabolic trough type where the carbon dioxide is used as operating fluid. The use of a working fluid in gaseous state will allow to achieve higher temperatures (550 °C) than those normally taken in the thermodynamic solar plants built to date. Moreover, in the project ESTATE-Lab, is present a section of accumulation of thermal energy which is based on heat exchange between carbon dioxide and solid materials at high heat capacity. This mode of storage allows the management of heat accumulated by means of the evolution of temperature profile (thermocline). In this work, in addition to the description of the laboratory, are also presented the models of simulation used to assess the performance of the plant and the results of comparative studies that led to the choice of carbon dioxide as working fluid. In addition, also the simulation results of the section of heat accumulation in different conditions of solar radiation are reported.
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