High-efficiency thermodynamic power cycles for concentrated solar power systems

RENEWABLE & SUSTAINABLE ENERGY REVIEWS

卷:30

Review

Dunham, Marc T.¹  Iverson, Brian D.^1,2 

[1] Sandia Natl Labs, Albuquerque, NM 87185 USA

[2] Brigham Young Univ, Provo, UT 84602 USA

关键词: CSP;    High-efficiency thermodynamic cycles;    Solar thermal;    Solar thermodynamics;    Brayton;    Rankine;    CO2 recompression;   

DOI  :  10.1016/j.rser.2013.11.010

来源: Elsevier

【 摘 要 】

This paper provides a review of high-efficiency thermodynamic cycles and their applicability to concentrating solar power systems, primarily focusing on high-efficiency single and combined cycles. Novel approaches to power generation proposed in the literature are also highlighted. The review is followed by analyses of promising candidates, including regenerated He-Brayton, regenerated CO2-Brayton, CO2 recompression Brayton, steam Rankine, and CO2-ORC combined cycle. Steam Rankine is shown to offer higher thermal efficiencies at temperatures up to about 600 degrees C but requires a change in materials for components above this temperature. Above this temperature, CO2 recompression Brayton cycles are shown to have very high thermal efficiency, potentially even exceeding 60% at 30 MPa maximum pressure and above 1000 degrees C maximum temperature with wet cooling. An estimate of a combined receiver and power cycle operating temperature is provided for the cycles considered and compared to the traditional approach of optimization based on the Carnot efficiency. It is shown that the traditional approach to optimizing the receiver and turbine inlet temperatures based on Carnot is generally not sufficient, leading to an optimum temperature shift of more than 100 degrees C from the Carnot case under various conditions. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free