THERMAL CHARACTERISTICS OF SPRINGY SHAPE COIL PACKED BED IN ROTATING REGENERATORS

Deen Hussain Alwan, Dhia-Al

	THERMAL CHARACTERISTICS OF SPRINGY SHAPE COIL PACKED BED IN ROTATING REGENERATORS
AL-TAQANI
Article 1, Volume 19, Issue 2, 2006, Pages 7-18
Author
Dhia-Al Deen Hussain Alwan
Abstract
The heat storing / transporting mass of the rotating regenerators in power plants is usually made of corrugated plates. Corrugations serve to provide greater turbulence and thus film heat transfer coefficient as well as providing sufficient stiffness to airflow passages. The metal plates are usually made of different sizes, pitches and profiles. The thermal characteristic and pressure drop of alternative (springy shape coil packed bed) capable of performing the same thermal duty is presented in this study. Coil elements cross-section diameter ranging from (dc=2mm) to (dc=8mm) with springy shape of the coil elements diameter ranging from (ds=50mm) to (ds=100mm) with pitch distance twice the coil element diameter are considered for the packed bed. The performance (film heat transfer coefficient, the pressure drop, thermal efficiency) of the pack is investigated computationally and compared to the plate matrix performance. It is found that the heat capacity and the film heat transfer coefficient of the alternative pack for most sizes of (dc & ds) are greater than that of the original pack and cause an increase in the thermal efficiency. although the heat transfer surface area of the alternative pack is less than that of the original pack. It is found also that the pressure drop in the alternative pack is much less than that of the original pack for all sizes of (dc & ds).

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