EXPERIMENTAL INVESTIGATION ON THE PERFORMANCE OF A LITHIUM CHLORIDE WHEEL
Abstract
This work has investigated the influence of change in operation conditions on the performance of a Lithium Chloride (LiCl) wheel. A rigorous experimental rig that facilitates the measurement of temperature, pressure, pressure drop, relative humidity, airflow rate and rotational speed is used. The measurements covered balanced flow at a wide range of rotational speeds (0-9.8 rpm), regeneration temperatures (50-70 °C), airflow rates (280-540 kg/h) and relative humidities (30 -65%) at ambient condition. The influence of those operation conditions on the wheel sensible effectiveness and coefficient of performance (COP) are analyzed. The result revealed that a maximum COP occurs at a rotational speed of 0.2 rpm (12 rph). The results also concluded that Kays and London correlation is sufficient in the prediction of the effectiveness of the LiCl wheel. It represents the experimental data with an average absolute percent deviation (AAPD) of 2.16 and a maximum absolute percent deviation (APDmax) of about 6.00.
Dates
- Submission Date2011-01-27
- Revision Date2011-05-09
- Acceptance Date2011-06-07
References
- Simonson, C. J., Besant, R. W. (1999). Energy Wheel Effectiveness: Part I Development of Dimensionless Groups. International Journal of Heat and Mass Transfer 42, pp. 2161-2170.
- Simonson, C. J., Besant, R.W. (1999). Energy Wheel Effectiveness: Part Ii-Correlations. International Journal of Heat and Mass Transfer 42, pp. 2171-2185.
- Simonson, C. J., Besant, R. W. (1997). Heat and Moisture Transfer in Desiccant Coated Rotary Energy Exchangers: Part I. Numerical Model. HVAC&R Research 3 (4), pp. 325-350.
- Simonson, C. J., Shang, W., Besant, R. W. (2000). Part Load Performance of Regenerative Heat Exchanger Effectiveness: Part Ii-. by Pass Control and Correlation. ASHRAE transaction 106(1), pp. 301-310.
- Ge, T. S., Ziegler, F., Wang, R. Z. (2010). A Mathematical Model for Predicting the Performance of a Compound Desiccant Wheel (A Model for Compound Desiccant Wheel). Applied Thermal Engineering 30, pp.1005-1015
- Xuan, S., Radermacher, R. (2005). Transient Simulation for Desiccant and Enthalpy Wheels. International Sorption Heat Pump Conference June 22-24, Denver, CO, USA ISHPC-098-2005.
- Zheng, W., and Worek, W.M. (1993). Numerical Simulation of Combined Heat and Mass Transfer Processes in a Rotary Dehumidifier. Numerical Heat Transfer 23(A): pp. 211-232.
- Rabah, A. A.; Mohamed, S. A. (2009). Latent Effectiveness of Desiccant Wheel: A Silica Gels-Water System, Journal of Industrial Research. 6, pp. 12-22.
- Rabah, A. A.; Fekete, A.; Kabelac, S. (2009). Experimental Investigation on a Regenerator Operating at Low Temperatures. ASME Journal of Thermal Sciences and Engineering Applications, 1 (4), pp. 041004-13.
- Shah, R. K. (1981). Thermal Design Theory of LiCl Wheels. In: Kakac, S., Bergles, A. E., Mayinger, F., 1981, Heat Exchangers: Thermal-Hydraulic Fundamentals and Design, pp. 721-763, Hamisphere, New York.
- VDI, VDI-GVC. (2007). VDI- Waermeatlas, 10. Aufl., Springer-Verlag, Berlin.
- Kays, W. M., London, A. L. (1984). Compact Heat Exchangers. McGraw-Hill, New York.
Volume
16,
Issue
4,
Pages1137 -1150