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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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Solar thermal power generation can be achieved by
Using focusing collector or heliostates
Using flat plate collectors
Using a solar pond
Any of the above system
Any of the above system
Quick Summary: Solar thermal power generation involves converting solar radiation into thermal energy to produce high-pressure steam, which then drives a turbine to generate electricity. This process can be achieved through various concentration techniques or thermal storage systems depending on the temperature requirement and thermodynamic cycle used.
Solar thermal power generation involves converting solar radiation into thermal energy to produce high-pressure steam, which then drives a turbine to generate electricity. This process can be achieved through various concentration techniques or thermal storage systems depending on the temperature requirement and thermodynamic cycle used.
ηth=1−ThotTcold — Carnot efficiency limitation for thermal conversion
Q=m⋅cp⋅ΔT — Basic heat gain formula for solar collectors
The principle relies on the absorption of solar energy by a heat transfer fluid. Focusing collectors (heliostats) achieve high temperatures for Rankine or Brayton cycles. Flat plate collectors are typically used for low-temperature applications, while solar ponds store thermal energy in a stratified brine solution to provide a continuous heat source for organic Rankine cycle turbines.
Focusing systems (CSP) are required for grid-scale high-temperature steam generation.
Solar ponds provide a unique combination of collection and long-term thermal storage.
Efficiency of thermal systems is highly dependent on the concentration ratio.
Flat plate collectors are limited to low-grade thermal applications (< 100°C).
Integrated thermal storage allows for power generation during cloudy periods.
Uses conventional steam turbine technology common in fossil fuel plants.
Lower overall conversion efficiency compared to Photovoltaic (PV) systems.
Requires significant direct solar radiation (DNI) for high-temperature CSP.
Utility-scale solar power plants.
Industrial process heat generation.
Remote area standalone power systems.
| Feature | Focusing Collector | Flat Plate |
|---|---|---|
Temp Range | High (> 300°C) | Low (< 100°C) |
Solar Pond systems utilize a density gradient (salinity) to prevent convection, trapping heat at the bottom layer.
Option B is typically for water heating but can drive low-temp organic fluid turbines (ORC).
D is correct — Solar thermal power can be generated through various technologies including CSP (concentrating), flat-plate, and salt-gradient solar ponds, depending on the thermal demand.
Always remember that solar thermal involves a thermodynamic cycle (heat to mechanical to electrical), unlike PV which is a direct quantum-mechanical conversion.