Thermal Performance Improvement of Solar Parabolic Dish System Using Modified Spiral Coil Tubular Receiver

Table 1

Temperature range for working fluids [10].

Working fluid	Temperature level
Water and Therminol VP-1	Up to 550 K
Molten salt	Up to 870 K
Liquid sodium	Up to 1100 K
Air, CO2, and He	Greater than 1100 K