Radiant heating and cooling systems are able to provide superior thermal comfort while reducing energy consumption. The heat transfer mechanisms involved in hydronic floors, ceilings and other building surfaces are often complex combinations of convection and radiation heat flows that depend on system geometry, ambient conditions, water supply temperature, flow rate and characteristics, solar radiation effects and space configuration.
Related projects
Experimental investigation of passive chilled beams (PI: Prof. Braun)
Energy performance of passive chilled beams vs air systems (PI: Prof. Braun)
Transient heat transfer models and dynamic control of floor radiant heating systems (co-PI: Prof. Horton)
Distribution of absorbed solar gains in buildings and impact on radiant systems operation
Thermal comfort evaluation with radiant surfaces
Related publications
J. Kim, A. Tzempelikos, J.E. Braun, "Energy savings potential of passive chilled beams vs air systems in various US climatic zones with different system configurations", Energy and Buildings, 186, 244-260 (2019).
S. Lee, J. Joe, P. Karava, I. Bilionis, A. Tzempelikos, “Implementation of a self-tuned HVAC controller to satisfy occupant thermal preferences and optimize energy use”, Energy and Buildings, 194, 301-316 (2019).
J. Kim, A. Tzempelikos, W.T. Horton, J.E. Braun, "Experimental investigation and data-driven regression models for performance characterization of single and multiple passive chilled beam systems", Energy and Buildings, 158, 1736-1750 (2018).
J. Kim, A. Tzempelikos, J.E. Braun, "Review of modeling approaches for passive ceiling cooling systems", Journal of Building Performance Simulation, 8(3), 145-172 (2015).
Y-C. Chan, A. Tzempelikos, “Analysis and comparison of absorbed solar gain distribution models in perimeter building zones”, ASHRAE Transactions (Technical Paper DE-13-012), 119 (2), 129-145 (2013).
D.M. Rohan, A. Tzempelikos, W.T. Horton, “Development of an Advanced Radiation Exchange Module for Use in Simulation of Spaces with Radiant Systems”, Proceedings of 1st High Performance Buildings conference at Purdue, July 2010.