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

Han Hwataik (국민대학교 기계자동차공학부)
Kim Min-Kyu (국민대학교 대학원)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.12, 2004 , pp. 1197-1203 More about this Journal
Abstract
This study investigates the air leakage and heat transfer characteristics of a rotary-type air-to-air heat exchanger with a fiber polyester matrix. The leakage airflow rate is measured using a tracer gas method for various ventilation rates and rotational speeds of the matrix wheel. A correlation equation for air leakage is obtained by combining the pressure leakage and the carryover leakage. The pressure leakage is observed to be a function of ventilation airflow rate only, and the carryover leakage is found to be a linear function of rotational speed. The real efficiency of the heat exchanger can be obtained from its apparent efficiencies by taking into account the air leakage ratio. As the ventilation rate increases, the heat recovery efficiency decreases. As the rotational speed of the matrix increases, the efficiency increases initially but reaches a constant value for the rotational speeds over 10 rpm.
Keywords
Air-to-air heat exchanger; Heat recovery; Rotary type; Carryover leakage; Pressure leakage;
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  • Reference
1 ASHRAE, 1997, Handbook ASHRAE-Fundamentals, Atlanta, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc
2 Tae, C. S., Park, S. N, 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, SAREK, Vol. 5, No.1, pp. 45-54
3 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
4 Simonson, C.J., Ciepliski, 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.I88-205
5 Kim, M. K., 2003, An experimental study on the heat transfer characteristics of rotarytype total heat exchanger, MS thesis, Kookmin University, Seoul, Korea
6 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, SAREK, Vol. 3, No.2, pp. 131-141
7 ASHRAE Standard, 1984, Method of Testing Air-to-Air Heat Exchanger, pp.84-78
8 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
9 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