The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 28-614
Full Name: Florin - Niculae Alexe
Position: Professor
Age: ON
Sex: Male
Address: Power Engineering Department, Politehnica University of Bucharest, Splaiul Independentei 313, Sector 6
Country: ROMANIA
Tel: 0214029434
Tel prefix: 004
Fax:
E-mail address: florin.alexe@energ.pub.ro
Other E-mails: alexe_flor_nic@yahoo.fr
Title of the Paper: Thermodynamic analyses for optimizing the design of HTGR¡¦s Helium Brayton cycles
Authors as they appear in the Paper: Florin Alexe, Victor Cenusa
Email addresses of all the authors: florin.alexe@energ.pub.ro,alexe_flor_nic@yahoo.fr,victor.cenusa@energ.pub.ro,cenusa_victor@yahoo.com
Number of paper pages: 12
Abstract: The paper analyzes the close-circuit Brayton (Joule) cycles for High Temperature Gas (Helium) cooled nuclear Reactors (HTGR). Analyzed cycles are with Regenerative Heat Exchanger (RHE), Fragmented Compression and Inter-Cooling (FC&IC). The HTGR imposes the working agent and hot source¡¦s parameters. The cooling conditions give the cycle¡¦s minimal temperature. In the 1st paper¡¦s section, for ideal processes cycles, we show that: A) the boundary parameters and design schemes inflict: A1) the compression ratios (ƒÕ), A2) the specific net work per 1 kg He (wnet), and A3) the thermal efficiencies (£bth); B) the performances are increasing with the IC¡¦s number. In the 2nd section we are taking into consideration the irreversibility¡¦s factors (temperature difference at RHE, revolving machines isentropic efficiencies, and pressure drops) doing sensitivity analyses about their influences on real processes cycle¡¦s performances. We show that: 1) cycle¡¦s performances are!
not continuous growing with IC¡¦s number, and 2) the main influences on design¡¦s option are given by: 21) the temperature difference at RHE and 22) the pressure drops. In the 3rd section we adjusted all the quality factors in a similar manner, reducing the irreversibilities, showing the synergic influences. The 4th section relaxes the hot source¡¦s restrictions. It analyses the influence of HTGR output / input temperatures variation on the main thermodynamic data, showing: £\) the benefit of maximal temperature increase and £]) the need to correlate HTGR¡¦s temperature increment output vs. input with the maximal temperature. The final section contains the main conclusions of the paper.
Keywords: Brayton Cycle, HTGR, Irreversibility, Sensitivity Analysis, Numerical Computation, and Thermodynamic Optimization
EXTENSION of the file: .pdf
Special (Invited) Session: Thermodynamic Processes Irreversibility Influences, on Performances and Design of Helium Joule Cycle for HTGR
Organizer of the Session: 593-180
How Did you learn about congress: George Darie, george.darie@energy.pub.ro, Horia Necula, horia.necula@energ.pub.ro
IP ADDRESS: 141.85.104.8
