Technological premises for a successful economical path toward low carbon economy are described. It is attempted to relate fossil fuels (lignite) combustion with the requirements for sustainable energy production in Greece proposing economic, feasible and environmentally friendly methods for...

Geothermal heat pumps are becoming more and more popular as the price of fossil fuels is increasing and a strong reduction of anthropogenic CO2 emissions is needed. The energy performances of these plants are closely related to the thermal and hydrogeological properties of the soil, but a proper...

We present an effective finite difference formulation for implementing and modeling multiple borehole heat exchangers (BHE) in the general 3-D coupled heat and flow transport code SHEMAT. The BHE with arbitrary length can be either coaxial or double U-shaped. It is particularly suitable for...

The behaviour of a near-critical sample of SF6, bounded by container walls with finite thermal properties, was studied in space during the 1994 IML-2 mission. Experiments were performed in the range 2500 to 1 mK above the critical point in which simultaneous density and temperature measurements...

In nonequilibrium systems in the ballistic transport regime, every point of the system contains particles arriving from different regions–each of them at different temperatures–and there are only few collisions, in such a way that equilibrium between the different populations will be reached...

We investigate the two-dimensional transport of heat through viscous flow between two parallel rough interfaces with a given fractal geometry. The flow and heat transport equations are solved through direct numerical simulations, and for different conduction–convection conditions. Compared...

Phase change materials (PCMs) are increasingly being used for thermal energy storage in buildings and industry to produce energy savings and reduce carbon dioxide emissions. PCM slurries are also being investigated for active thermal energy storage or as alternatives to conventional single phase...

We couple a one-dimensional energy balance climate model with heat transportation across latitudes, with an economic growth model. We derive temperature and damage distributions across locations and optimal taxes on fossil fuels which, in contrast to zero-dimensional Integrated Assessment...

We develop a numerical model for large eddy simulation of turbulent heat transport in the Strait of Gibraltar. The flow equations are the incompressible Navier–Stokes equations including Coriolis forces and density variation through the Boussinesq approximation. The turbulence effects are...