JP Journal of Heat and Mass Transfer
Volume 15, Issue 1, Pages 1 - 13
(February 2018) http://dx.doi.org/10.17654/HM015010001 |
|
SIMPLIFIED MODEL FOR THERMO- AND DIFFUSIOPHORETIC DEPOSITION IN A HEAT EXCHANGER
Mamdouh El Haj Assad, Ehab Hussein Bani-Hani, Bashria Yousef, Ahmad Sedaghat and Muhammad Tawalbeh
|
Abstract: A model is presented to estimate the aerosol particle deposition in heat exchangers due to combustion processes. The model estimates deposition by thermophoresis and diffusiophoresis using parameters which are easily measurable during the power plant operation. These parameters are the flue gas temperature for thermophoresis and the humidity for diffusiophoresis. Aerosol particles are often found to have a log-normal distribution. The model for thermophoresis estimates the particle deposition using the mean diameter and the standard deviation of the log-normal size distribution. As thermophoresis is particle size dependent, the mean diameter and the standard deviation have influences on the deposition estimate and therefore on the deviation from the sum of the deposition calculated for different size bins. An easy-to-use graphic is introduced to correct this deviation. |
Keywords and phrases: Keywords and phrases: deposition, diffusiophoresis, heat exchanger, thermophoresis. |
|
Number of Downloads: 402 | Number of Views: 2535 |
|