High temperatures occurring during stagnation conditions can be very detrimental to the reliability, durability and safety of solar thermal systems. Various approaches to mitigate the effects to stagnation have been employed in the past, however as collector and system efficiencies improve, and larger solar systems are installed, the need for reliable and cost effective stagnation control schemes is increasing. In this paper, the impacts of stagnation and various approaches to stagnation control are discussed and compared with regard to their features and limitations.

Additional Metadata
Keywords Overtemperature contol, Solar collectors, Solar thermal systems, Stagnation temperature contol
Supporting Host International Energy Agency, Solar Heating and Cooling Programme (SHC)
Persistent URL dx.doi.org/10.1016/j.egypro.2012.11.090
Journal Energy Procedia
Conference 1st International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2012)
Harrison, S. (Stephen), & Cruickshank, C. (2012). A review of strategies for the control of high temperature stagnation in solar collectors and systems. In Energy Procedia (Vol. 30, pp. 793–804). doi:10.1016/j.egypro.2012.11.090