Results 21 to 30 of about 1,562 (254)

A movable boundary model for helical coiled once-through steam generator using preconditioned JFNK method

International Journal of Advanced Nuclear Reactor Design and Technology, 2022
Helical coiled once-through steam generator (H-OTSG) is the largest and the most complicated heat exchanger in the high-temperature gas-cooled reactor (HTGR), whose performance plays an important role in the nuclear power plant design and dynamic ...
Yingjie Wu, Baokun Liu, Han Zhang, Jiong Guo, Fu Li   +4 more
doaj   +1 more source

Performance Analysis and Tube Inlet Orifice Length Evaluation of a Once–Through Steam Generator [PDF]

E3S Web of Conferences, 2019
A numerical study is conducted for performance analysis and secondary side screw-type tube inlet orifice design of a once–through steam generator (OTSG).
Sik Han Hun, Kang Han-Ok, Yoon Juhyeon, Kim Young In, Bae Youngmin, Kim Sang Ji   +5 more
doaj   +1 more source

Design of Coil-Wound Once-Through Steam Generator System for Concentrating Solar Power Plants

SolarPACES Conference Proceedings
The viability of solar tower plants is endangered owing to multiple failures, mainly in their steam generators. These failures produce unscheduled shutdowns with significant economic losses that increase the financing costs of this technology due to its
Dario Pardillos-Pobo, Pedro-Ángel González-Gómez, María Berbey-Burgos, Domingo Santana   +3 more
doaj   +1 more source

Study on the thermal and geometrical parameters of helical coil once-through steam generator system

International Journal of Advanced Nuclear Reactor Design and Technology, 2021
Due to the special structure, helical coil once-through steam generators (HCOTSGs) can withstand greater thermal expansion stress, have a larger heat exchange area, and cause the secondary flow phenomenon to improve the heat transfer capacity.
Hao Yao, Guo Chen, Kailin Lu, Haoyu Liao, Yingwei Wu, Wenxi Tian, Guanghui Su, Suizheng Qiu   +7 more
doaj   +1 more source

Small modular reactors (SMRs): Comparison of saturated versus superheated steam Rankine cycle under equal thermodynamic constraints

Nuclear Engineering and Technology
With part-load operation is increasingly becoming important issue for small modular reactors (SMRs), two secondary Rankine cycles for a 500 MWth pressurized-water-reactor small modular reactor were compared under identical thermodynamic constraints: a ...
Gyudong Kim, Yong Jae Chae, Takhyun Chun, Jeong Ik Lee   +3 more
doaj   +1 more source

Study on the Structure Optimization and the Operation Scheme Design of a Double-Tube Once-Through Steam Generator

Nuclear Engineering and Technology, 2016
A double-tube once-through steam generator (DOTSG) consisting of an outer straight tube and an inner helical tube is studied in this work. First, the structure of the DOTSG is optimized by considering two different objective functions.
Xinyu Wei, Shifa Wu, Pengfei Wang, Fuyu Zhao   +3 more
doaj   +1 more source

Hybrid Dynamic Surrogate Modelling for a Once-Through Steam Generator

, 2023
Hybrid Dynamic Surrogate Modelling for a Once-Through Steam ...
Blakseth, Sindre Stenen, Andersson, Leif Erik, Mocholí Montañés, Rubén, Mazzetti, Marit Jagtoyen   +3 more
openaire   +3 more sources

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Design of Control System of Once-Through Steam Generator Based on Proximal Policy Optimization Algorithm

Science and Technology of Nuclear Installations, 2022
Because of the characteristics of the small water volume of OTSG, it is hard to control the outlet steam pressure when the load is changed or disturbed. This study is devoted to the control of the once-through steam generator (OTSG).
Cheng Li, Ren Yu, Wenmin Yu, Tianshu Wang   +3 more
doaj   +1 more source

Nano‐Scale Characterization of Impurities Segregation in Solid Oxide Electrolysis Cells

Advanced Functional Materials, EarlyView.
Cathodic polarization induces impurity segregation in Ni, forming an amorphous Na─Al─Si─O amorphous phase at grain boundaries. Under ultralow oxygen partial pressure, multiple elements dissolve, migrate, and reoxidize within the metal. A patterned model system provides direct nanoscale evidence, clarifying the mechanism of polarization‐driven impurity ...
Zhongtao Ma, Qingjie Wang, Bowen Li, Vasileios Bilalis, Søren Bredmose Simonsen, Ming Chen   +5 more
wiley   +1 more source