Journal ArticleDOI
Design and performance analysis of a supercritical CO2 radial inflow turbine
TLDR
In this article, the design study of an S-CO2 radial inflow turbine based on system optimization is conducted, and the CFD simulation of the turbine under design and offdesign conditions is performed, and tip clearance analysis is conducted to evaluate the turbine performance.About:
This article is published in Applied Thermal Engineering.The article was published on 2020-02-25. It has received 20 citations till now. The article focuses on the topics: Turbine & Brayton cycle.read more
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A systematic review of supercritical carbon dioxide(S-CO2) power cycle for energy industries: Technologies, key issues, and potential prospects
TL;DR: In this paper , the state-of-the-art and existing problems of the supercritical carbon dioxide (S-CO2) power technology are reviewed from the perspective of system analysis and component design.
Journal ArticleDOI
On the Conceptual Design of Novel Supercritical CO2 Power Cycles for Waste Heat Recovery
Giovanni Manente,Mário Costa +1 more
Abstract: The supercritical CO2 power cycle (s-CO2) is receiving much interest in the utilization of waste heat sources in the medium-to-high temperature range. The low compression work and highly regenerative layout result in high thermal efficiencies, even at moderate turbine inlet temperatures. The capability of heat extraction from the waste heat source is, however, limited because the heat input takes place over a limited temperature range close to the maximum cycle temperature. Accordingly, novel s-CO2 layouts have been recently proposed, aimed at increasing the heat extraction from the heat source while preserving as much as possible the inherently high thermal efficiency. Among these, the most promising ones feature dual expansion, dual recuperation, and partial heating. This work concentrates on the conceptual design of these novel s-CO2 layouts using a systematic approach based on the superimposition of elementary thermodynamic cycles. The overall structure of the single flow split with dual expansion (also called cascade), partial heating, and dual recuperated cycles is decomposed into elementary Brayton cycles to identify the building blocks for the achievement of a high performance in the utilization of waste heat sources. A thermodynamic optimization is set up to compare the performance of the three novel layouts for utilization of high temperature waste heat at 600 °C. The results show that the single flow split with a dual expansion cycle provides 3% and 15% more power compared to the partial heating and dual recuperated cycles, respectively, and 40% more power compared to the traditional single recuperated cycle used as the baseline. The separate evaluation of thermal efficiency and heat recovery effectiveness shows the main reasons behind the achievement of the highest performance, which are peculiar to each novel layout.
Journal ArticleDOI
Exergy destruction analysis of a low-temperature Compressed Carbon dioxide Energy Storage system based on conventional and advanced exergy methods
TL;DR: In this paper, the conventional exergy analysis and advanced exergy analyses were utilized to analyze the thermodynamic characteristics of a LT-CCES system consisting of CO2 Brayton cycle, low-temperature thermal energy storage and cold energy storage, whose thermal storage temperature is below 200°C.
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Design and loss analysis of radial turbines for supercritical CO2 Brayton cycles
TL;DR: In this article, the effect of design power scale and specific speed on supercritical CO2 operated radial inflow turbines within the power range of 0.1 MW to 3.5 MW is investigated and analyzed.
Journal ArticleDOI
Optimal structure design of supercritical CO2 power cycle for gas turbine waste heat recovery: A superstructure method
TL;DR: In this paper, a new superstructure of supercritical CO2 cycle for waste heat recovery based on the concept of splitting, which could optimize system structure and design parameters simultaneously, was proposed.
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Journal ArticleDOI
Review of supercritical CO2 power cycle technology and current status of research and development
TL;DR: The supercritical CO2 (S-CO2) Brayton cycle has recently been gaining a lot of attention for application to next generation nuclear reactors as mentioned in this paper, which has a small physical footprint with a simple layout, compact turbomachinery, and heat exchangers.
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Supercritical CO2 Brayton cycles for solar-thermal energy
TL;DR: In this article, the behavior of developmental CO2 Brayton turbomachinery in response to a fluctuating thermal input, much like the short-term transients experienced in solar environments, is analyzed.
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Exergetic analysis of supercritical CO2 Brayton cycles integrated with solar central receivers
TL;DR: In this paper, detailed energy and exergy analysis of four different supercritical CO2 Brayton cycle configurations were performed with and without reheat, and the effect of turbine inlet temperature and the cycle configuration on the thermal performance was analyzed.