Performance optimization of turboexpander-compressors for energy recovery in small air-separation plants

Y Meng, Y Zhang, J Wang, S Chen, Y Hou, L Chen - Energy, 2023 - Elsevier
In this paper, a reverse-bootstrap turboexpander-compressor (TEC) scheme is proposed for
the direct recovery of expansion work into the cooling capacity of small air-separation plants …

Analysis of vortex characteristics and energy losses in a cryogenic hydrogen turbo-expander for a 5 t/d hydrogen liquefier

X Li, K Zhang, J Li, Z OuYang, T Shi - International Journal of Hydrogen …, 2024 - Elsevier
The cryogenic hydrogen turbo-expander (CHTB) is the most core component which
determines the dependability and efficiency of hydrogen liquefiers. In present study, CFD …

Experimental and numerical approach for characterization and performance evaluation of cryogenic turboexpander under rotating condition

M Kumar, R Biswal, SK Behera, RK Sahoo… - … Communications in Heat …, 2022 - Elsevier
A small-scale radial expansion turbine is distinguished by its ease of production, higher
efficiency, and reliability. Such turbines have been successfully used in cryogenic …

A comparative investigation of thermodynamic performance and flow field structure of a modified Collins cycle-based helium turboexpander system

M Kumar - International Communications in Heat and Mass …, 2021 - Elsevier
The optimum design of radial expansion turbine and nozzle (turboexpander) have a
remarkable effect on the thermophysical performance of gas liquefaction cycles. The present …

Parametric design optimization and thermodynamic analysis of plate fin heat exchanger for helium liquefaction system

M Kumar, S Pal, D Patil - Cryogenics, 2024 - Elsevier
The plate-fin heat exchanger is one of the most important components of helium liquefaction
system as it recovers cold energy from helium gas in the cold box. Because of larger heat …

A re-liquefaction process of LNG boil-off gas using an improved Kapitsa cycle: eliminating the BOG compressor

C Wang, D Sun, Q Shen, Y Duan, X Huang - Energy, 2024 - Elsevier
Re-liquefication of boil-off gas (BOG) from liquefied natural gas is essential for maintaining
LNG tank safety and facilitating methane recovery. This study aims to reduce the energy …

Optimization of coalbed methane liquefaction process based on parallel nitrogen reverse Brayton cycle under varying methane contents and liquefaction ratios

C Wang, D Sun, Q Shen, K Shen, Y Duan - Energy, 2024 - Elsevier
The recovery of coalbed methane (CBM) is of significance in preventing coal mining
accidents, environmental protection, and energy conservation. Liquefying natural gas …

High-efficiency control strategies of a hydrogen turbo-expander for a 5 t/d hydrogen liquefier

K Zhou, K Zhao, L Chen, Z Zhang, K Deng, S Chen… - Energy, 2024 - Elsevier
Liquid hydrogen plays a crucial role in the large-scale storage and long-distance
transportation of hydrogen energy. Effectively controlling hydrogen turbo-expanders is an …

Optimal design of thermal performance of an orifice pulse tube refrigerator

D Panda, M Kumar, AK Satapathy… - Journal of Thermal …, 2021 - Springer
In this paper, simultaneous influence of low and high pressure of helium compressor,
frequency, opening coefficient of orifice valve and waiting time of rotary valve on the cooling …

A methodology for performance prediction: aerodynamic analysis of axially loaded gas foil bearing

J Kumar, DS Khamari, SK Behera, RK Sahoo - Sādhanā, 2021 - Springer
As a major component of any high rotating turbomachinery to withstand an axial load of the
system while providing stability to the rotor, gas foil thrust bearing (axial bearing) should be …