Abstract The evacuated-tube collector (ETC) for solar heat production is one of the most efficient systems to convert Sun energy into usable energy. Unfortunately, some technological barriers are still present in solar-thermal that limit use these technologies decarbonize processes. An important obstacle requirement at stable temperatures, which not always achievable by fields, e.g. variable sk...

Heat driven cooling technologies like vapour absorption and adsorption systems are environmentally friendly. Use of thermal compression in these systems saves precious and fast-depleting fossil fuel resources. Solar energy and low-grade waste heat can be effectively used in running these cooling systems. The present work focuses on the development of a solar-powered vapour adsorption based cool...

The global trends for the rapid growth of distributed solar heat and power in the last decade will likely continue as the levelized cost of production for these technologies continues to decline. To be able to compare the economic potential of solar technologies one must first quantify the types and amount of solar resource that each technology can utilize; second, estimate the technological pe...

A theoretical and experimental analysis is carried out of radiative heat transfer in the coaxial geometry evacuated tube solar collectors. The gray body approximation implicit use an effective emissivity does not strictly apply to collectors due selective absorber coating partially transmitting outer glass thermal infrared, especially when constructed from borosilicate. We develop analytic expr...

The Andean Equatorial Region, due to its geographic location, shows great potential for using solar energy. Solar thermal energy is of interest in the residential sector Ecuador and other countries as a method avoid fossilderived fuels consumption. However, previous learnings operation water heating systems latitudes cannot be used conditions Ecuador. Thus, performance this region deserves furt...