Optimization by means of an analytical heat transfer model of a thermal insulation for CSP applications based on radiative shields

In order to predict the thermal insulation performance of coated carbon fiber fabric, a numerical heat transfer model under high temperature was established. The simulation results were validated by quartz lamp ablation experiment. The experimental values were in agreement with the numerical values, and the average relative error between them was 9.47%. Furthermore, the impact of structural parameters on the thermal insulation of coated carbon fiber fabrics, by using the numerical heat transfer model, was investigated. The results show that thermal insulation for the samples is in the order of plain < 2/1 twill < 3/3 twill < 5/3 stain, when using constant structure density and yarn fineness. Thermal insulation performance of the samples dramatically increases as yarn fineness goes from 3 to 12 K. Furthermore, when the structure density increases to more than 70 ends/10 cm, the thermal insulation property shows an increasing trend.

Download Full-text

RADIATIVE HEAT TRANSFER MODEL IN ARBITRARY ENCLOSURES BY RAY-TRACING

Proceedings of the Second International Symposium on Radiation Transfer ◽

10.1615/ichmt.1997.intsymliqtwophaseflowtranspphenchtradtransfproc.60 ◽

1997 ◽

Cited By ~ 2

Author(s):

Wen Cai

Keyword(s):

Heat Transfer ◽

Ray Tracing ◽

Radiative Heat Transfer ◽

Radiative Heat ◽

Heat Transfer Model ◽

Transfer Model

Download Full-text

A Heat Transfer Model for Concentrating Silicon Solar Cells in a Spectrally Splitting Hybrid Receiver

Proceedings of the 15th International Heat Transfer Conference ◽

10.1615/ihtc15.sol.009067 ◽

2014 ◽

Cited By ~ 1

Author(s):

Ahmad Mojiri ◽

Cameron Stanley ◽

Elizabeth Thomsen ◽

Vernie Everett ◽

Andrew Blakers ◽

...

Keyword(s):

Heat Transfer ◽

Solar Cells ◽

Heat Transfer Model ◽

Silicon Solar Cells ◽

Transfer Model

Download Full-text

Theoretical Post-Dryout Heat Transfer Model

International Journal of Computational Physics Series ◽

10.29167/a1i1p142-150 ◽

2018 ◽

Vol 1 (1) ◽

pp. 142-150

Author(s):

Murat Tunc ◽

Ayse Nur Esen ◽

Doruk Sen ◽

Ahmet Karakas

Keyword(s):

Heat Transfer ◽

Droplet Diameter ◽

Heat Transfer Model ◽

Transfer Model ◽

Operating Pressure ◽

Vertical Pipe ◽

Two Phase ◽

Experimental Values ◽

Reactor Operating ◽

Coolant System

A theoretical post-dryout heat transfer model is developed for two-phase dispersed flow, one-dimensional vertical pipe in a post-CHF regime. Because of the presence of average droplet diameter lower bound in a two-phase sparse flow. Droplet diameter is also calculated. Obtained results are compared with experimental values. Experimental data is used two-phase flow steam-water in VVER-1200, reactor coolant system, reactor operating pressure is 16.2 MPa. On heater rod surface, dryout was detected as a result of jumping increase of the heater rod surface temperature. Results obtained display lower droplet dimensions than the experimentally obtained values.

Download Full-text