The rapid growth of literature on convective heat and mass transfer through porous media has brought both engineering and fundamental knowledge to a new state of completeness and depth. Additionally, several new questions of fundamental merit have arisen in several areas which bear direct relation to further advancement of basic knowledge and applications in this field. For example, the growth of fundamental heat transfer data and correlations for engineering use for saturated media has now reached the point where the relations for heat transfer coefficients and flow parameters are known well enough for design purposes. Multiple flow field regimes in natural convection have been identified in several important enclosure geometries. New questions have arisen on the nature of equations being used in theoretical studies, i. e. , the Validity of Darcy assumption is being brought into question; Wall effects in high and low velocity flow fields have been found to play a role in predicting transport coefficients; The formulation of transport problems in fractured media are being investigated as both an extension of those in a homogeneous medium and for application in engineering systems in geologic media and problems on saturated media are being addressed to determine their proper formulation and solution. The long standing problem of how to adequately formulate and solve problems of multi-phase heat and mass transfer in heterogeneous media is important in the technologies of chemical reactor engineering and enhanced oil recovery.

r. portance of Energy Storage 1 B. 11lk1 and S. Iaka Thermal Energy Storage Systems and Their Dynamic Behavior 11 W. J. Yang Second Law Optimization of Thermal Energy Storage Systems: 37 Fundaaentals and Sensible Heat Systems R. J. Irane Second Law Optimization of Thermal Energy Storage Systems: 69 Latent Heat Systems R. J. Irane Design, Optimization and Control of a Thermal Energy Storage System 89 Y. Jaluria A MOdel for Energy Retrieval from a Thermal Storage 117 G. Cossali, G. de Giorgio and L. Mazzarella Storage of Solar Thermal Energy 129 S. Iaka . E. Payko and Y. Yener Thermal Energy Storage and Extraction in Solar Ponds 163 Y. Jaluria Phase Change Heat Transfer in Cylindrical Domain: MOdelling and 191 Its Importance in the Thermal Energy Storage M. Toksoy and B. Z. ilken Solar Energy Storage in Packed Beds 231 W. J. Yang Expert. ental and Numerical MOdelling of Solar Energy Storage in 249 Rockbeds and Encapsulated Phase Change Material Packings J. M. Buchlin New Approaches to Heat Storage in Buildings 303 C. J. Swet Thermal Energy Storage for Cooling in Commercial Buildings 315 H. Akbari and A. Mertol Cool Storage for Solar and Conventional Air Conditioning 349 C. J. Swet The Importance of Heat Storage When Using Cogeneration Plants in Cold 369 Climates A. Haag Gravity-Assisted Melting in Enclosures 383 S. Sengupta and S. K. Roy Energy Storage and Nuclear Reactors 415 N. Aybers Comparison of Solar-Hydrogen with Synthetic Fossil Fuels 431 T. N."

r. portance of Energy Storage 1 B. 11lk1 and S. Iaka Thermal Energy Storage Systems and Their Dynamic Behavior 11 W. J. Yang Second Law Optimization of Thermal Energy Storage Systems: 37 Fundaaentals and Sensible Heat Systems R. J. Irane Second Law Optimization of Thermal Energy Storage Systems: 69 Latent Heat Systems R. J. Irane Design, Optimization and Control of a Thermal Energy Storage System 89 Y. Jaluria A MOdel for Energy Retrieval from a Thermal Storage 117 G. Cossali, G. de Giorgio and L. Mazzarella Storage of Solar Thermal Energy 129 S. Iaka . E. Payko and Y. Yener Thermal Energy Storage and Extraction in Solar Ponds 163 Y. Jaluria Phase Change Heat Transfer in Cylindrical Domain: MOdelling and 191 Its Importance in the Thermal Energy Storage M. Toksoy and B. Z. ilken Solar Energy Storage in Packed Beds 231 W. J. Yang Expert. ental and Numerical MOdelling of Solar Energy Storage in 249 Rockbeds and Encapsulated Phase Change Material Packings J. M. Buchlin New Approaches to Heat Storage in Buildings 303 C. J. Swet Thermal Energy Storage for Cooling in Commercial Buildings 315 H. Akbari and A. Mertol Cool Storage for Solar and Conventional Air Conditioning 349 C. J. Swet The Importance of Heat Storage When Using Cogeneration Plants in Cold 369 Climates A. Haag Gravity-Assisted Melting in Enclosures 383 S. Sengupta and S. K. Roy Energy Storage and Nuclear Reactors 415 N. Aybers Comparison of Solar-Hydrogen with Synthetic Fossil Fuels 431 T. N."