Nate Siegel

Nate Siegel

Associate Professor of Mechanical Engineering
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Educational Background

  • B.S., Cal Poly, San Luis Obispo
  • M.S., San Diego State University
  • Ph.D., Virginia Tech

Research Interests

  • Energy conversion technologies
  • Energy conservation and efficiency
  • Solar power and fuels
  • Thermal energy storage
  • Fuel cells
  • Optics
  • Atmospheric water extraction
  • Solar Desalination


  • Fluid Mechanics (MECH 313)
  • Heat Transfer (MECH 312)
  • Senior Design (MECH 401/402)
  • Concentrating Solar Power
  • Thermodynamics (MECH 213)
  • Solar Energy Technologies (MECH 420)
  • Building Your IDEAS (ENGR 252)
  • Graphics for Design and Manufacture (MECH 202)

Research Projects

Professional Memberships and Certifications:

  • Member American Society of Mechanical Engineers
  • Licensed Professional Engineer, New Mexico, 2011
  • American Society for Engineering Education

Selected Publications

Siegel, N.P., Gross, M.D., Coury, R., The Development of Direct Absorption and Storage Media for Falling Particle Solar Central Receivers, Journal of Solar Energy Engineering, 2015, vol.137.

Ermanoski, I., Siegel, N.P., Stechel, E.B, A New Reactor Concept for Efficiency Solar Thermochemical Fuel Production, Journal of Solar Energy Engineering, 2013, vol. 135(3).

Siegel, N. P., Miller, J. E., Ermanoski, I., Diver, R. B., & Stechel, E. B. (2013). Factors Affecting the Efficiency of Solar Driven Metal Oxide Thermochemical Cycles. Industrial & Engineering Chemistry Research, 52(9), 3276-3286.

Palumbo, R., Diver, R.B., Larson, C., Coker, E.N., Miller, J.E., Guertin, J., Shoer, J., Meyer, M., Siegel, N.P., Solar Thermal Decoupled Water Electrolysis Process I: Proof of Concept. Chemical Engineering Science, 2012, vol. 84, 372-380.

Siegel, N.P., "Thermal Energy Storage for Solar Thermal Power Production", Wiley Interdisciplinary Reviews, accepted for publication, 2011.

Siegel, N.P., "Solar Thermochemical Fuels: Research and Development in the United States ", Journal of the Japan Institute of Energy, 2011, in press.

Siegel, N.P., Ho, C.K., Khalsa, S.S., Kolb, G.J., "Development and Validation of a Prototype Solid Particle Receiver: On-Sun Testing and Model Validation", ASME J. Solar Energy Engineering, 2010, vol. 132, pp. 021008-1:021008-8.

Siegel, N.P., "Solar thermal power generation in the United States", Journal of the Japan Institute of Energy, 2010, vol. 89(4), pp. 322-330.

Hickner, M.A., Siegel, N.P., Chen, K.S., Hussey, D.S., Jacobson, D.L., "Observations of Transient Flooding in a Proton Exchange Membrane Fuel Cell Using Time-Resolved Neutron Radiography", J. Electrochem. Soc., 2010, vol. 157, issue 1, pp. B32-B38.

Richard B. Diver, James E. Miller, Mark D. Allendorf, Nathan P. Siegel, and Roy E.Hogan, "Solar Thermochemical Water-Splitting Ferrite-Cycle Heat Engines," Journal of Solar Energy Engineering, 2008, vol. 130.

Committee on Forecasting Future Disruptive Technologies, "Persistent Forecasting of Disruptive Technologies - Report 2", The National Research Council, 2010.

Committee on Forecasting Future Disruptive Technologies, "Persistent Forecasting of Disruptive Technologies", The National Research Council, 2009.

Hogan, "Solar Thermochemical Water-Splitting Ferrite-Cycle Heat Engines," Journal of Solar Energy Engineering, 2008, vol. 130.

Kolb, G.J, Diver, R.B, Siegel, N.P., "Central-Station Solar Hydrogen Power Plant,"Journal of Solar Energy Engineering, 2007, vol. 129, pp.179-183.

Coppo, M., Siegel, N.P., von Spakovsky, M.R., "On the Influence of Temperature on PEM Fuel Cell Operation", Journal of Power Sources, 2006, vol. 159, issue 1, pp. 560-569.

Siegel, N.P., Ellis, M.W., Nelson, D.J., von Spakovsky, M.R., "A Two-Dimensional Computational Model of a PEMFC with Liquid Water Transport", Journal of Power Sources, 2004, vol. 128, issue 2, pp. 173-184.

Siegel, N.P., Ellis, M.W., Nelson, D.J., von Spakovsky, M.R., "A single domain PEMFC model based on an agglomerate catalyst geometry", Journal of Power Sources, 2003, vol. 115, issue 1, pp. 81-89.

Goodin, D.T., Gibson, C.R., Petzoldt, R.W., Siegel, N.P., Thompson, L., Nobile, A., Besenbruch, G.E., Schultz, K.R., "Developing the basis for target injection and tracking in inertial fusion energy power plants", Fusion Engineering and Design, 2002, vol. 60, issue 1, pp. 27-36.

Goodin, D.T., Alexander, N.B., Gibson, C.R., Nobile, A., Petzoldt, R.W., Siegel, N.P., Thompson, “Developing target injection and tracking for inertial fusion energy power plants”, Nucl. Fusion, 2001, vol. 4, issue 5, pp. 527-535.

Siegel, N. P., & Roba, J. P. (2018). “Design, Modeling, and Characterization of a 10 kWe Metal Halide High Flux Solar Simulator.” Journal of Solar Energy Engineering, 140(4), 045001.

Rea, J. E., Oshman, C. J., Olsen, M. L., Hardin, C. L., Glatzmaier, G. C., Siegel, N. P., ... & Toberer, E. S. (2018). “Performance modeling and techno-economic analysis of a modular concentrated solar power tower with latent heat storage.” Applied Energy, 217, 143-152.
Roba, J. P., & Siegel, N. P. (2017). “The design of metal halide-based high flux solar simulators: Optical model development and empirical validation.” Solar Energy, 157, 818-826.
Singh, A., Lapp, J., Grobbel, J., Brendelberger, S., Reinhold, J. P., Olivera, L., ... & Sattler, C. (2017). “Design of a pilot scale directly irradiated, high temperature, and low pressure moving particle cavity chamber for metal oxide reduction.” Solar Energy, 157, 365-376.
Ho, C. K., Christian, J. M., Romano, D., Yellowhair, J., Siegel, N., Savoldi, L., & Zanino, R. (2017). “Characterization of particle flow in a free-falling solar particle receiver.” Journal of Solar Energy Engineering, 139(2), 021011.