Page 7 - Reverse_osmosis2016

S. Casimiro et al. / Desalination and Water Treatment 61 (2017) 183–195 189

Table 3
Main simulations inputs for SAM and ROSA
Input value Value

CSP Plant
Installed CSP power (PT using oil as HTF), MW 44 net (49.4 gross)
e
Thermal storage, h 13
Rated cycle conversion efficiency, % 37.74
Condenser temperature for rated cycle conversion efficiency , C 35
§ o
Solar multiple* 3
Irradiation at design (reaching the solar field), W m –2 950
Total collector loop conversion efficiency (Solargenix SGX-1), % 71.69
o
Design inlet temperature, C 391
Design outlet temperature, C 291
o
Operating boiler pressure, bar 100
Hot standby period, h 2
Thermal power fraction for standby, % 20
Max. turbine overdesign operation, % 105
Min. turbine operation, % 25
Direct normal irradiation (DNI), kWh m y –1 2004
–2
†
Fossil fill fraction , % 0
RO
Number of trains 6
Number of stages and passes / train 2 stages (each stage with only 1 pass)
Total number of pressure vessels / RO train n = 85
Pressure vessels staging Ratio / RO train 49:36
Total number of membranes (entire RO plant) n = 3 060
Feed water flow rate (entire RO plant), m d –1 13 333
3
System recovery rate, % 45
Flow factor 1
o
Feedwater temperatures, C 10(min)/22(max)
Feedwater salinity (TDS), mg l –1 40,000
pH 7.6
Pre-stage ΔP, bar 0.345
Membrane type SW30HRLE-400i
Pump efficiency, % 90
Energy recovery device efficiency, % 90
Individual RO train start-up time, min 20
RO plant start-up time, min 130
Individual RO train shutdown time, min 15
RO plant shutdown time, min 130
% Energy consumption used with intake, pre-treatment and outfall vs. total RO plant 30
consumption, %
MED
Total number of effects (n) 12
MED designed fraction compared to CSP heat load output 1:1
Intake distance to MED plant, m 2 778
Saturated steam powering MED (this is the temperature defining the low pressure of 64.5
the steam leaving the CSP turbine), C
o
Seawater temperatures, C 10(min) / 22(max)
o
Seawater salinity (TDS), mg l –1 40,000
Hot restart time , min 100
‡
(Continued)