This paper demonstrates that the medium-or-low temperature solar heat can be used to generate power efficiently by integrating into conventional coal-fired power plants. In so-called solar aided power generation (SAPG) technology, medium-or-low temperature solar heat is used to replace parts of bled-off steams in regenerative Rankine cycle to pre-heat feedwater. Thermal oil can be used as solar heat carrier and no solar steam needs to be generated, therefore the pressure of solar system can be much lower than that of the solar collector using water/steam as the heat carrier. A 200MW coal-fired thermal power plant is selected as the case study to demonstrate the advantages of the SAPG technology in terms of solar to power efficiency, specific fuel and steam consumption rates, under various integration scenarios. The results indicate that there is a great potential and effect for low or medium solar heat to be used for power generation purposes through SAPG approach.
Applied Thermal Engineering – Elsevier
Published: Feb 1, 2011
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