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An Experimental Study on Air Leakage and Heat Transfer Characteristics of a Rotary-type Heat Recovery Ventilator  

Han, Hwa-Taik (School of Mechanical and Automotive Engineering, Kookmin University)
Kim, Min-Kyu (Graduate School, Kookmin University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.13, no.2, 2005 , pp. 83-88 More about this Journal
Abstract
This study investigates the air leakage and heat transfer characteristics of a commercially available rotary-type air-to-air heat exchanger with a fiber polyester matrix. Crossover leakage between the exhaust and supply air is measured using a tracer gas method for various ventilation rates and rotational speeds of the wheel. A correlation equation for the leakage is obtained by summing up pressure leakage and carryover leakage. The pressure leakage is observed to be a function of ventilation rate only, and the carryover leakage is found to be a linear function of wheel speed. The real efficiency of the heat exchanger can be obtained from its apparent efficiency by taking into account the leakage ratio. The heat recovery efficiency decreases, as the ventilation rate increases. As the wheel speed increases, however, the efficiency increases initially but reaches a constant value for the speeds over 10rpm.
Keywords
Air-to-air heat exchanger; Heat recovery; Rotary type; Carryover leakage; Pressure leakage;
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  • Reference
1 Choi, Y. D., Park, S. D., Woo, J. S. and Tae, C. S., 1991, A study on the optimum design of axial rotary sensible heat exchanger for the heat recovery of exhaust gas, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 3, No. 2, pp. 131-141
2 Shang, W., Wawryk, M. and Besant, R. W., Air crossover in rotary wheels used for air-to-air heat and moisture recovery, ASHRAE Trans., Vol. 107, pp. 72-83
3 Kim, M. K., 2003, An experimental study on the heat transfer characteristics of rotarytype total heat exchanger, MS thesis, Kookmin University, Seoul, Korea
4 ASHRAE, 1997, Handbook ASHRAE-Fundamentals, Atlanta, ASHRAE, Inc
5 Shah, R. K. and Skiepko, T., 1999, Influence of leakage distribution on the thermal performance of a rotary regenerator, Applied Thermal Engineering, pp. 685-705
6 Tae, C. S., Park, S. D., Cho, S. H. and Choi, Y. D., 1993, Experimental study on the performance of axial flow rotary heat exchanger with the porous polyurethane foam matrix, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 5, No. 1, pp. 45-54
7 Simonson, C. J., Ciepliski, D. L. and Besant, R. W., 1999, Determining the performance of energy wheels: Part I - Experimental and numerical methods, ASHRAE Trans., Vol. 105, No. 1, pp. 177-187
8 ASHRAE Standard, 1984, Method of Testing Air-to-Air Heat Exchanger, pp. 84-78
9 Simonson, C. J., Ciepli ski , D. L. and Besant, R. W., 1999, Determining the performance of energy wheels: Part II- Experimental data and numerical validation, ASHRAE Trans., Vol. 105, No. 1, pp. 188-205