Theoretical analysis of a method for segmented heat exchanger design

Song, Jiwei; Xu, Mingtian; Cheng, Lin

doi:10.1007/s11434-011-4462-7

Cited by 6 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is closer to the required temperature of the curative effect in the process of RF ablation against prostate tissue. Meanwhile its performance price ratio is higher than if using calf serum as the visualization reagent, as is conventionally done [11,12]. Because the interval of every measurement point was 2.5 mm, we obtained as much temperature change data as possible which was sufficient for a 2D or 3D temperature distribution to be simulated.…”

Section: Discussionmentioning

confidence: 99%

Experiment on building a real-time temperature field distribution model of the prostate using special data encryption multi-pole radiofrequency ablation and a visualization phantom

Chen

2011

Chin. Sci. Bull.

View full text Add to dashboard Cite

The aim of this study was to explore the utility of a visualization phantom for building a real-time temperature field distribution model of the prostate created by the application of special data encryption (SDE) multi-pole radiofrequency (RF) ablation. We prepared phantoms (phantom group) using acrylamide as the raw material and egg-white as a color developing reagent. The prostate specimens of male adult dogs were fixed in this phantom to create a prostate phantom (prostate group). The SDE multi-pole RF electrode was inserted into the two groups for RF ablation, and the temperature changes at relevant points in space were detected. We set the x-axis as the left and right direction, the y-axis as the fore and aft direction, and the z-axis as the insertion direction of the RF electrode. After this process, the effect of RF ablation on the appearance of each of the two groups was observed. Using temperature measurements taken during the operation, a three-dimensional (3D) surface model of temperature was constructed by drawing the boundary areas of different temperatures on the maximum x-z plane of the two groups of ablation lesions, with y equivalent to 0. Further comparison of the temperature-time change curves of four space points were made by setting y equivalent to 0, z equivalent to 0.5, and x equivalent to 0, 0.25, 0.5 and 0.75. White solid lesions with a diameter of approximately 12 mm could be found in both groups after RF ablation. During the ablation of the phantom group, the temperature ascended faster in a zone 1 cm from the needlepoint to the needle body, and 0.5 cm about the radiofrequency needle. The time-property result of the x-z plane with y equivalent to 0 showed that the boundary areas of the two groups were closer at 50 and 60°C, but the difference between the two groups at 70°C in the high temperature zone was relatively large. The 3D temperature surface model further proved that the 3D temperature outline at 60°C was in better concordance with the actual effect of RF ablation in the prostate tissue. In the comparison of temperature-time changing curves of the two groups at the four space points, despite there being a significant difference in the changing process (P=0.0001), there was no significant statistical difference in the final temperature of the two groups (P>0.05). The results of this work indicated that ablation appearance was in good agreement with in-vitro biologic tissues and that the RF temperature field distribution can be obtained by using a visualization phantom. In particular, the shape of the isothermal line at 60°C was close to the actual ablation lesion. These results may serve as a valuable reference to future clinical trials.visualization phantom, multi-pole radiofrequency ablation, prostate Citation:Chen L, Hu B, Hu B. Experiment on building a real-time temperature field distribution model of the prostate using special data encryption multi-pole radiofrequency ablation and a visualization phantom.

show abstract

Section: Discussionmentioning

confidence: 99%

Experiment on building a real-time temperature field distribution model of the prostate using special data encryption multi-pole radiofrequency ablation and a visualization phantom

Chen

2011

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…Modeling of Three-dimensional Models. At first, only half part of each HE is modeled for the sake of their axis-symmetry property on structure [3]. There are three kinds of HE models, all of their external structure is the same as the three-dimensional structure of HE shown in Fig.…”

Section: Modeling and Simulation Of The Hementioning

confidence: 99%

“…For Re is a low Reynolds number, according to previous study, Wilcox ω − k model is best suitable for the simulation of exhaust gas. Thus the standard ω − k equation is taken to calculate the fluid mechanics [3,4]. The boundary condition is set as velocity inlet and pressure outlet [5].…”

Section: Modeling and Simulation Of The Hementioning

confidence: 99%

Modeling and Optimization of Heat Exchanger in Automotive Exhaust Thermoelectric Generator Based on Fluid Kinematics

Wang

Zhou

et al. 2014

AMR

View full text Add to dashboard Cite

The HE (heat exchanger) of automotive exhaust TEG (thermoelectric generator) plays a vital role in converting thermal energy into electrical energy, therefore achieves the goal of energy conservation and emission reduction. A new regular-octagon HE is modeled and simulated in FLUENT to obtain the velocity path-lines of fluid. Through simulation results, the velocity path-line is tracked and analyzed, in order to evaluate the fluid resistance and fluid turbulence intensity. By using control variable method, a variety of HE models with different structural parameters are modeled and simulated, to optimize the structure of HE. Eventually, it is intended to design a HE with proper fluid resistance and remarkable turbulence intensity.

show abstract

Recent progress on renewable energy in engineering thermophysics

Jin

et al. 2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

This article portrays a concise review on the state-of-the-art advancements in methodologies and applications of engineering thermophysics for renewable energy, which includes wind energy, solar energy, geothermal energy, biomass energy, hydroelectric energy and CO 2 capture, transportation and storage. In the past two years, great progresses have been made in the field of renewable energy [1][2][3]. The corresponding important progress of various energy utilizations will be reviewed, including wind power, solar energy, biomass, geothermal energy, and so on.

show abstract

Theoretical analysis of a method for segmented heat exchanger design

Cited by 6 publications

References 9 publications

Experiment on building a real-time temperature field distribution model of the prostate using special data encryption multi-pole radiofrequency ablation and a visualization phantom

Experiment on building a real-time temperature field distribution model of the prostate using special data encryption multi-pole radiofrequency ablation and a visualization phantom

Modeling and Optimization of Heat Exchanger in Automotive Exhaust Thermoelectric Generator Based on Fluid Kinematics

Recent progress on renewable energy in engineering thermophysics

Contact Info

Product

Resources

About