Results 21 to 30 of about 3,852 (197)

Study of PTC System with Rectangular Cavity Receiver with Different Receiver Tube Shapes Using Oil, Water and Air

Energies, 2020
Today, application of cavity receivers in solar concentrator systems is suggested as an interesting and novelty research subject for increasing thermal performance.
Alireza Rafiei, Reyhaneh Loni, Gholamhassan Najafi, Talal Yusaf   +3 more
doaj   +1 more source

Heat transfer enhancement of tubes in various shapes potentially applied to CO2 heat exchangers in refrigeration systems: Review and assessment

International Journal of Thermofluids, 2023
To make carbon dioxide (CO2) heat exchangers in refrigeration systems more efficient and compact, passive methods for heat transfer enhancement produced by tubes in various shapes were surveyed and assessed.
Wenguang Li, Sambhaji Kadam, Zhibin Yu
doaj   +1 more source

Experimental Study of the Double Pipe Heat Exchanger for Heat Transfer and Pressure Drop Characteristics of the Grooved Tube [PDF]

Engineering and Technology Journal
Experiments are conducted to investigate the heat transfer and pressure drop characteristics of corrugated tubes and rod baffles in a shell-and-tube heat exchanger. One of the effective techniques to improve heat transfer is to use corrugated tubes. This
Natiq Fadhil, Amer Aldabbagh, Falah Hatem   +2 more
doaj   +1 more source

Multi-objective optimization for a novel sandwich corrugated square tubes

Alexandria Engineering Journal, 2023
The sandwich corrugated square tubes (SCSTs), which includes outer square tube (OST), inner square tube (IST) and middle corrugated square tube (CST), have been has been proved to have excellent energy absorption performances.
Xiaolin Deng, Fumo Yang, Libo Cao, Jiale Huang   +3 more
doaj   +1 more source

Radical‐Mediated Dispersion Breaks Aggregation Limits in Carbon Thermoelectrics

Angewandte Chemie, EarlyView.
We report a rationally designed small molecule (OTN) that effectively disperses SWCNTs via π–π and radical‐radical interactions, yielding hybrid films with a record power factor of 30.1 µW cm−1 K−2 and excellent flexibility. A nine‐leg device achieves a record normalized power density of 0.653 µW cm−2 K−2, setting a new benchmark for carbon‐based ...
Shanshan Zhou, Xiao‐Lei Shi, Meng Li, Wenyi Chen, Tianyi Cao, Nan‐Hai Li, Min Zhang, Prashant Sonar, Qian Liu, Zhi‐Gang Chen   +9 more
wiley   +2 more sources

Investigation of super-critical water-based nanofluid with different nanoparticles (shapes and types) used in the rectangular corrugated tube of reactors

Alexandria Engineering Journal, 2022
In this paper, an optimized rectangular corrugated tube is used for the super-critical water reactor (SCWR) cooling, numerically. Al2O3, CuO, Fe3O4 and TiO2 nanoparticles in different shapes (spherical, brick, platelet and cylindrical) are considered as ...
H. Behzadnia, Hui Jin, M. Najafian, M. Hatami   +3 more
doaj   +1 more source

Heat Transfer Enhancement and Flow Resistance Characteristics in a Tube with Alternating Corrugated-Smooth Segments

Inventions
To mitigate the inherent high flow resistance of conventional corrugated tubes, a novel design with alternating clockwise/counterclockwise corrugated segments separated by smooth sections is proposed.
Junwen Cheng, Jiahao Zhu, Xin Wen, Haodong Yu, Wei Lin, Zuqiang Xin, Jiuyang Yu   +6 more
doaj   +1 more source

Impedance of a Beam Tube with Small Corrugations [PDF]

, 2000
In accelerator projects involving the use of very short bunches, such as the Linac Coherent Light Source (LCLS)--where the rms bunch length in the undulator section is 30-microns--it appears that even submicron imperfections in the beam tube surface can generate an impedance that is unacceptably large.
Bane, K. L. F., Stupakov, V. V.
openaire   +3 more sources

Numerical Study on the Optimization of Hydrogen Storage Performance in a Finned Sinusoidal Corrugated Tube Reactor

Energies
Metal hydride (MH) systems offer a compelling route to solid-state hydrogen storage, yet their practical charging rate is fundamentally limited by the low effective thermal conductivity of the hydride bed and the substantial exothermic heat generated ...
Haozhe Zhang, Shengjie Wang, Zeqi Chen, Jiajia Song, Ming Gao   +4 more
doaj   +1 more source

Effect of Concave Corrugated Tube Shape on The Effectiveness of Double Pipe Heat Exchanger [PDF]

E3S Web of Conferences
Heat exchangers have an important role in everyday life. A heat exchanger is a device used as a means of energy transformation. The development of heat exchangers undergoes a form transformation that aims to increase efficiency through its work function.
Arsana I Made, Wibowo Theodorus Wiyanto, Muhaji, Sari Handini Novita, Kurniawan Haydar Aly   +4 more
doaj   +1 more source