Professor of Practice and Associate Chair
Mountaintop Campus
Lehigh University
Iacocca Hall
111 Research Drive
Bethlehem, PA 18015

Phone Number: 
(610) 758-4729
Kemal Tuzla

Areas of Research

Thermal Energy Storage
Heat Transfer
Falling Film Evaporation


Novel Storage Technologies for Thermal Engineering

Use of solar energy for electric power generation is expected to increase exponentially. Current concentrating solar collectors can collect solar energy at high temperatures, up to 1000 degrees C. It is desirable and economical to be able to store this energy when the sunshine is available and use it for power generation when the sun is not there. Current thermal storage systems (TES) operate using sensible heat at temperatures up to 500 degrees C because of the limitations on storage media used. Our goal is to increase the temperature of the storage media to higher temperatures more than 500 degrees C, as well as increasing energy storage density -- We are utilizing phase change, solid to liquid, to increase both. The goal is to reach storage temperatures up tp 900 degrees C. Calorimetric experiments are being carried out to determine the stability of storage and release of energy into the storage materials. Bench scale experiments, such as calorimetry, to determine characteristics of storage media and a 35 kW pilot test facility are used. Experimental work is being supported by predictive modeling in order to extend the results to large scale applications. Click here for a related article in Resolve Magazine.

Heat Transfer in Gas-Solid Fluidized Beds

Gas-solid fluidized beds find many applications in chemical and environmental industry. Heat transfer between the fluidized particles and solid surfaces in complex and dependent to many variables. Extensive experimental research is carried out in our laboratory to understand the hydrodynamics of this gas-solid flow and mechanisms for heat transfer. Specific instrumentation has been developed to characterize local and average particle concentrations and their effect on heat transfer rate. Analytical and phenomenological models are developed to represent characteristics of the two-phase flow and heat transfer.

Boiling and Evaporation

Boiling of single or multi-component fluids is encountered in many processes in the chemical industry, which include small air conditioning systems as well as large power plants. In our laboratories, we have an extensive experimental program to study convective boiling as well as pool boiling of single and multi-component fluids. The overall phenomena are a complex one involving fluid mechanics, heat and mass transfer. We have developed special instrumentation to detect local and average information on heat transfer. Experimental information helps us to understand the phenomena and develop phenomenological models/ correlations for use in engineering application in chemical engineering industry.


Ph.D., Technical University of Istanbul
M.S., Technical University of Istanbul
B.S., Technical University of Istanbul

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