concentrating solar power and desalination plants engineering pdf
This chapter4 describes the modelling of a parabolic-trough (PT) concentrating solar
power (CSP) plant that produces electricity. To do this, the modelling of the solar
field itself is explained first and then the power cycle, consisting of a reheat Rankine
cycle, with steam as the working fluid. This power cycle will be used subsequently
to be coupled to a desalination plant, creating what is known as a dual-purpose solar
power/water cogeneration plant.
This chapter5 addresses the description and thermodynamic analysis for the integration of desalination plants into the power cycle described in Chap. 4. The systems chosen for this study combine a Concentrating Solar Power plant using parabolictrough collector technology for electricity generation with various desalination plants, giving rise to what is known as a parabolic-trough concentrating solar power and desalination (PT-CSP + D) plant. The description of the PT-CSP plant,
based on the Andasol-1 (Blanco-Marigorta et al., 2011) commercial plant, is detailed in Chap. 4, showing all the model equations.
The desalination technologies selected to combine with the PT-CSP plant were multi-effect distillation (MED) and reverse osmosis (RO), as discussed in Chap. 1. On one hand, the simultaneous production of water and electricity using an RO plant connected to a CSP plant seems the simpler option. On the other hand, the integration of a low-temperature MED (LT-MED) plant is an interesting alternative because it allows replacement of the conventional power-cycle condenser by using exhaust steam as the thermal energy source for the desalination plant.