Answered: A CSP supercritical steam power plant…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A CSP supercritical steam power plant using a concentrating collector arrayfor DSG (refer to Figure 8.12) is operating under the following conditions:
• Plant electric power output Pel = 28 MW
• Intensity of beam solar radiation incident on the concentrator aperture
Ibc = 798 W/m2
• Aperture area of a single concentrator module Aap = 420 m2
• Efficiency of the collector ηc = 0.7
• Power plant thermal efficiency ηth = 0.39
• Efficiency of the electric generator ηg = 0.97
• HTF is water/steam
• Superheated steam condition at the absorber outlet/turbine inlet:
ps = 250 bars, ts = 600°C
• Feedwater temperature at the absorber inlet = tw = 280°C

Calculate (i) the power plant overall (electrical) efficiency, (ii) the thermal capacity of the power plant, (iii) the rate of useful heat output of a
DSG collector module, (iv) the number of concentrator modules, and (v) the steam generation rate of the solar collector.

Superheater
Saturated
Superheated
steam
steam
Beam solar radiation
Wet
saturated
steam
Absorber tube
Fuel + Air
Water
Water/steam
separator
Pump
a
a
Water recirculation
Parabolic through concentrator
FIGURE 8.12 A parabolic trough concentrator for direct steam generation (DSG) with fuel-
fired steam superheater.

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