Many solar collectors are available in the market. A comprehensive list is shown
in Table 4. However not all the collector types presented in Table 4are suitable for
process-heat applications as some of them, like the two-axes tracking collectors, are
employed for high-temperature applications as in power generation.
There are two major types of collectors that can be applied for industrial
process-heat, non-tracking (stationary) collectors and one-axis sun-tracking para-bolic trough collectors. Both will be analysed here for a range of load supply
temperatures.