Optimization of a vacuum freezing cool-thermal storage coupled with wastewater treatment process
✍ Scribed by Cheng-Liang Chang; Yu-Zhi Chen; Chih-Ming Chang
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 746 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1099-2871
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✦ Synopsis
Abstract
Purification of wastewater by freezing under vacuum in a cool‐thermal storage process is investigated. Mathematical models of heat transfer and mass transfer in this system are developed to describe the thickness and the solute distribution of ice as the cool‐thermal storage process proceeds. A mathematical treatment for determining the optimum solidification thickness and operating time to remove the maximum amount of solute is presented. For the system of constant volumetric rate of vacuum, the suction rate is an important factor in determining the efficiency of the process. The suction rate should be kept within the range of 10,000 to 20,000 m^3^/m^2^hr when the solute distribution coefficient is less than 1. When the coefficient is greater than 1, the suction rate should be run within 5000 to 10,000 m^3^/m^2^hr. Over the proper range of operation, the optimal operating time is a weak function of suction rate. © 2004 Wiley Periodicals, Inc. Heat Trans Asian Res, 33(3): 189–200, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10134