Technical Report A.1.2 - Overheating prevention and stagnation handling in solar process heat applications
Stagnation handling in SHIP applications
Solar process heat plants have to operate totally reliable in all the operation modes that may occur. Other than for conventional closed hot water or steam supply systems solar thermal applications in general require specific technical solutions to cope with the phenomenon of stagnation.
This report gives an overview about topics related to stagnation and overheating in general and specifically with regard to solar assisted process heat applications.
The technical report will be soon ready for download.
Official start of the Solar Heat for Industrial Processes - SHIP database
The Solar Heat for Industrial Processes - SHIP database has been created in the framework of the IEA Task 49/IV. This online database contains a worldwide overview on existing solar thermal plants which provide thermal energy for production processes for different industry sectors. Each plant description contains a number of information e.g. about the size of the collector field, collector technology or integration point in the production process. An initial survey has been developed and sent out to different solar companies by AEE INTEC (www.aee-intec.at). The returned data has been collected, structured and integrated into the database by them. All the programming work for the database’s structure and design has been done by PSE (www.pse.de).
Now the user of the database has the possibility to extract detail information from all identified solar thermal plants and create statistics like the share of collector technologies, size of the collector field per country or industry sector and cost per square meter. The SHIP - database is a living platform and will grow continuously.
Retanning (leather industry) and Leaching (mining industry) in the focus of solar heat
The retanning process is a common process to be targeted by solar process heat. Currently 9 applications are successfully operating with a total gross solar area of 5,317 m². 7 of these
Retanning in Thailand, 1890 m²
Source: Aschoff Solar
Location of the leather factories with SHIP-applications.
Worldwide SHIP applications in the retanning process of leather industries
Source: AEE INTEC
The Codelco copper mine in Chile not only has the world's largest SHIP application, but also the largest solar thermal collector field (39,300 m²). The system keeps water at a constant temperature for the leaching process. A similar, but smaller application (790 m²) exists in Cyprus.