James Mathias | Mechanical Engineering and Energy Processes | SIU

Southern Illinois University



College of Engineering

James Mathias

Associate Professor

James Mathias

Office: ENGR E24
Phone: 618-453-7016
Fax: 618-453-7658

Dr. Mathias specializes in energy conservation and management as well as experimental testing of fluid dynamics and analytical and experimental testing of thermodynamic cycles.


  • Ph.D.   Mechanical Engineering, (2001), The Ohio State University, Columbus, OH.
  • M.S.    Mechanical Engineering, (1996), Brigham Young University, Provo, UT.
  • B.S.    Mechanical Engineering, (1994), Brigham Young University, Provo, UT.


ASHRAE Poster Presentation Award and ASHRAE Transactions Paper Award, Presented to J.A. Mathias and D.M. Mathias for Design, Construction, and Analysis of an Energy-Efficient, Cost-Effective, Passive-Solar Home, 2009.                                                               


Increasing Efficiency of an Existing PC boiler using VFDs and Improved Heat Exchangers, ICCI, May 2012- Present.


  • Energy conservation and management
  • Experimental fluid dynamics testing
  • Experimental and analytical thermodynamics


Su, H., Mathias, J.A., and Harrell, J.M., “Modeling of Proposed Changes to SIUC Central Heating, Air Conditioning, and Power Plant Incorporating Variable Frequency Drives and High Efficiency Turbine,” ASHRAE Transactions, 119 (1), pp. 156-166, 2013.

Ricks, R., Kowalchuk, R., Nicklow, J., Graceson-Martin, L., Gupta, L., Mathias, J., Tezcan, J., and Pericak-Spector, K., “Evaluation of a New Engineering Residential College Initiative,” Proceedings of ASEE Annual Conference and Exposition, Austin, TX, paper number AC 2009-1987, 29 pages, 2009.

Mathias, J.A., and Mathias, D.M. “Design, Construction, and Analysis of an Energy-Efficient, Cost-Effective, Passive-Solar Home,” ASHRAE Transactions, 115(1), pp. 419-426, 2009.

Mathias, J.A., Johnston, J.R., Cao, J., Priedeman, D.K., and Christensen, R.N., “Experimental Testing of Gerotor and Scroll Expanders used in, and Energetic and Exergetic Modeling of, an Organic Rankine Cycle,” Journal of Energy Resources Technology, 131(1), pp. 1-9, 2009.

Mathias J.A., Essenhigh, R.H., Radulovic, P.T., and Smoot, L.D., “Large Particle High-Pressure Oxidation Rates and Mechanisms,” Energy and Fuels, 17(3), pp. 587-601, 2003.

Priedeman, D.K., Garrabrant, M.A., Mathias, J.A., Stout, R.E., and Christensen, R.N., “Performance of a Residential Sized GAX Absorption Chiller,” Journal of Energy Resources Technology, 123 (9), pp. 236-241, 2001.