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Coordinator of Advising
Mechanical & Aerospace Engineering
North Carolina State University
3211 Broughton Hall
2601 Katharine Stinson Dr.
Campus Box 7910
Raleigh, North Carolina 27695-7910

Phone: (919) 515-5239
FAX: (919) 515-7968
Email: mlgonzal@eos.ncsu.edu

Picture of Manoel Luiz Gonzalez
Manoel Luiz Gonzalez

Description of Research
Dr. Gonzalez's research involves numerical evaluation of a ground loop heat exchanger. The heat transfer characteristics of an existing underground heat exchanger are analyzed to find a more accurate correlation to be used in a heat pump simulation. The heat exchanger is described, a computational grid is generated using boundary-fitted coordinates, and results for heat conduction are presented. A computer code for free convection inside the heat exchanger enclosure, using the Boussinesq approximation and a transient vorticity-stream function formulation, is developed and validated by comparing to experimental data. Heat transfer rate results for three Rayleigh numbers in the physical range of interest are presented as functions of time. Two correlations for the heat transfer rate as a function of the Rayleigh number are proposed. Sample results for temperature distribution are shown in graphical form. Dr. Gonzalez's research is in collaboration with Dr. John A. Edwards.

Lately, Dr. Gonzalez has been involved in the development of permanent devices for air flow measurements in HVAC ducts, development of architectural ducts for air distribution in residential HVAC systems and

research of restaurants indoor air quality.

Recent Papers or Publications
Gonzalez, M. L., and J. A. Edwards, "Computer Modeling of and Underground Heat Exchanger," accepted for publication in Mathematical Modeling and Scientific Computing, ISSN 1067-0688.

Gonzalez, M. L., and J. A. Edwards, "Transient Heat Conduction on a Multiply Connected Domain Grid for a Ground Loop Heat Exchanger," accepted for publication in Proceedings, 1993 ICHMT International Symposium on Heat and Mass Transfer in Energy Systems and Environmental Effects, Cancun, Mexico.

Special Honors or Awards

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