Supercritical Carbon Dioxide Brayton Power Cycle Development Overview

Abstract

The Knolls Atomic Power Laboratory (KAPL) and Bettis Atomic Power Laboratory are testing a supercritical carbon dioxide (S-CO2) Brayton power cycle system. The 100 kWe Integrated System Test (IST) is a two shaft recuperated closed Brayton cycle with a variable speed turbine driven compressor and a constant speed turbine driven generator using S-CO2 as the working fluid. The IST was designed to demonstrate operational, control and performance characteristics of an S-CO2 Brayton power cycle over a wide range of conditions. The IST design includes a comprehensive instrumentation and control system incorporating results of turbomachinery operational testing performed at Barber Nichols Inc (BNI) in the Sandia National Laboratory’s DOE test loop. A detailed dynamic performance model was used both to predict IST performance and to evaluate the testing completed at BNI. The IST construction was completed in mid 2011 and is currently undergoing shakedown testing. Results of testing completed to date and future testing plans will be summarized.

The influence of real gas effects on the performance of supercritical CO 2 dry gas seals

“…The supercritical CO 2 Brayton cycle is being actively developed for potential application in a wide range of energy conversion applications [20,21]. Dry gas seal, once mature for operation with supercritical CO 2 have been recommended for these applications [21] as they are more reliable, cost efficient, safer and offer the lowest leakage of any type of seals that can be applied in the harsh supercritical CO 2 environment [1,12].…”

Układy gazowo-parowe z CO2 jako czynnikiem roboczym

“…Interesującym zagadnieniem jest określenie efektywności ekonomicznej oraz energetycznej obiegów z CO2, szczególnie z zakresu, w którym mogą konkurować z obiegiem parowo-wodnym, np. w układach, w których istotne znaczenie mają nakłady inwestycyjne oraz waga i rozmiary układu parowego [1, 5,8]. Dziedziną techniki, która może się przyczynić do rozwoju obiegów z CO2 jako czynnikiem roboczym jest rozwój sposobów wychwytu i składowania dwutlenku węgla (CCS).…”

Investigation on Unsteady Flow Characteristics of a SCO2 Centrifugal Compressor

“…It demonstrated the accuracy and the feasibility of numerical investigation. Compared to normal CO 2 , the centrifugal compressor with SCO 2 has higher efficiency, a more compact mechanical structure, and a larger pressure ratio [26]. Hence, the work in this paper is of great importance for future power systems.…”