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A Study on Performance Characteristics for Closed Brayton Cycle in Inventory Regulation

[+] Author Affiliations
Huijing Jiang, Xiaoyong Yang, Jie Wang

Tsinghua University, Beijing, China

Ming Ding

Harbin Engineering University, Harbin, Heilongjiang, China

Paper No. ICONE22-30674, pp. V02BT09A013; 6 pages
doi:10.1115/ICONE22-30674
From:
  • 2014 22nd International Conference on Nuclear Engineering
  • Volume 2B: Thermal Hydraulics
  • Prague, Czech Republic, July 7–11, 2014
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-4591-2
  • Copyright © 2014 by ASME

abstract

High temperature gas-cooled reactor combined with gas turbine cycle can make full use of the high outlet helium temperature of reactor. Compared to the Open Brayton Cycle, inventory regulation is a new regulation method for Closed Brayton Cycle, which can control the output power of the cycle through the change of pressure level and mass flow of the system. Taking the 10MW high temperature gas-cooled test reactor coupled with helium-turbine cycle (HTR-10GT) for example, a more practice-oriented resistance model is established in this paper for the analysis of influence of resistance characteristic on key components and closed Brayton cycle. When helium inventory drops from 100% to 30% of rated value, the mass flow rate of helium decreases, so the local pressure loss coefficient keeps constant and the pressure loss coefficient increases. As a result, the efficiency of closed cycle decreased about 15%. The performance characteristics of the turbomachinery and heat exchangers are also discussed in detail as key components in the power conversation unit (PCU).

Copyright © 2014 by ASME

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