The optimum operational conditions of an air-to-air rotary regenerator (also called air preheater or heat wheel) for air conditioning applications which was designed and manufactured in Energy Systems Improvement Laboratory (ESIL) has been investigated in this paper. The performance of such a rotary regenerator was modeled and the numerical values of modeling output were verified with the experimental data obtained from the equipment testing. In the next step, the optimum operational conditions of the rotary regenerator were obtained using genetic algorithm optimization technique subject to a list of constraints. The objective function in the optimization technique was the thermal effectiveness, while the design parameters (decision variables) were volumetric flow rates of cold and hot air streams, matrix rotational speed, and the exchanger frontal area (heat transfer surface area). The apparatus was tested under the optimized operating conditions and the results were compared with the results obtained numerically applying genetic algorithm optimization. The experimental value for the effectiveness showed an acceptable closeness (2.07%) with the corresponding value obtained from the system modeling and optimization. The economic analysis of energy savings by the designed and manufactured regenerator showed a pay back period about 3 years.
[1]
Zhuang Wu,et al.
Model-based analysis and simulation of regenerative heat wheel
,
2006
.
[2]
S. C. Dhingra,et al.
Rotary heat exchanger performance with axial heat dispersion
,
1998
.
[3]
Ramesh K. Shah,et al.
A comparison of rotary regenerator theory and experimental results for an air preheater for a thermal power plant
,
2004
.
[4]
C. P. Howard,et al.
The Effect of Longitudinal Heat Conduction on Periodic-Flow Heat Exchanger Performance
,
1964
.
[5]
R. A. Mashelkar,et al.
Heat Transfer Equipment Design
,
1988
.
[6]
Matija Tuma,et al.
A numerical model for the analyses of heat transfer and leakages in a rotary air preheater
,
2006
.
[7]
Tomme J. Lambertson.
Performance Factors of a Periodic-Flow Heat Exchanger
,
1958,
Journal of Fluids Engineering.
[8]
N Ghodsipour,et al.
Experimental and sensitivity analysis of a rotary air preheater for the flue gas heat recovery
,
2003
.
[9]
A. London,et al.
Compact heat exchangers
,
1960
.
[10]
Frank P. Incropera,et al.
Fundamentals of Heat and Mass Transfer
,
1981
.
[11]
K. C. Leong,et al.
Microcomputer-based design of rotary regenerators
,
1991
.