outdoor experiments on a once-through single glazed solar air heater with perforated metal absorber plate were conducted to determine the practical effect of absorber plate porosity as well as suction air flow rate on the collector thermal efficiency and its total pressure drop. three aluminum absorber plates were made perforated by drilling circular holes with different diameter/pitch ratios i...

unglazed transpired solar collectors are widely used for heating outside air directly, these days. pre-heating ventilation air for large spaces and heating air for crop drying, are some of the applications of these kinds of collectors. the outside air is drawn straight from ambient, uniformly through the whole surface of a perforated absorber (transpired, dark-colored plate) exposed to the sun....

in this research a flat plate solar air collector was investigated under direct solar radiation consisted of a slatted glass cover, perforated absorber aluminum sheets (porosity 0.0177, 0.0314 and absorber thickness of 2.5 mm). the effect of porosity on absorber efficiency of collector was evaluated. six levels of air mass flow rates (0.0056 to 0.0385 kg m-2 s-1) were adopted.average solar ener...

Unglazed transpired collectors or UTC (also known as perforated collectors) are a relatively new development in solar collector technology, introduced in the early nineties for ventilation air heating. These collectors are used in several large buildings in Canada, USA and Europe, effecting considerable savings in energy and heating costs. Transpired collectors are a potential replacement for g...

Perforated tape with obstacle was applied inside the absorber pipe filled nanomaterial to intensify efficiency of current solar collector. Simulations were done via ANSYS FLUENT incorporating K–ε for turbulent flow and homogenous model nanomaterial. To reduce computation price, optimized size grid has been selected verification based on previous published data show nice accuracy. Height number ...

A listing of current boiler and smut collector installations is given illustrating the reduction from 59 to 19 boilers without smut collectors. Maximum boiler size has increased from 57 to 147 th-l. lrrigated perforated plate type scrubbers have been the most numerous units installed but some dry multi-cyclone collectors have also been used. Smuts dewatering systems are examined, some problem a...

Samuel Hobbs, Finny Monickaraj, Paul McGuire and Arup Das* Department of Surgery/Ophthalmology, University of New Mexico School of Medicine, MSC 10 8000, 1600 University Blvd. NE, Albuquerque, NM 87131, USA New Mexico VA Health Care System, Albuquerque, NM 87108, USA Department of Cell Biology and Physiology, University of New Mexico School of Medicine, MSC 10 8000, 1600 University Blvd. NE, Al...