The Solar Cyclone has been introduced as a means of extracting fresh water from Earth's atmosphere. The conceptual device operates in the fashion of a Solar Chimney; it is composed of a greenhouse for collecting and storing solar energy as heat, with a central chimney that channels an updraft of...

An exergy analysis has been conducted to show the effect of a small fan on the exergy efficiency in a pyramid-shaped solar still. The tests were carried out in Mashhad (36° 36′ N), for two solar still systems. One of them was equipped with a small fan (active system), to enhance the...

Permeability has been identified as one of the foremost factors that determine the effectiveness of CO2 sequestration in deep coalbeds. Coal matrix swelling can cause a remarkable decrease in the permeability of a coalbed reservoir during the carbon dioxide injection process. The main aim of...