An aluminium nocturnal radiator, painted with an appropriate white paint, was established on the roof of the Department of Environmental and Natural Resources Management in Agrinio, Western Greece. The lightweight metallic radiator was used for cooling the ambient air below its initial...

With the recent development of the IT technology, the demand for data centers has significantly increased, and modular data centers have attracted considerable attention because of their excellent stability, scalability, and economic feasibility. This research quantitatively analyzed the...

Air temperature measurements under the vegetation canopy of trees in suburban streets and at reference points were carried out under mostly light wind conditions in five streets in the city of Athens (Greece) during a short exceptionally hot weather period in 2007. The average cooling effect at...

This paper aims to present a parametric study to compare with the experimental results obtained previously for a typical activated carbon–methanol, adsorption air-conditioning system powered by exhaust heat. The main objective is to study the effect of wall thickness on the desorption...

Roof ponds cooled by nocturnal long wave radiation have often been proposed as a cheap and effective means of providing thermal comfort in buildings in hot-arid locations. Many of the schemes incorporate flat-plate radiators through which the water is circulated at night to be cooled. This paper...

The present research investigates a new evaporative cooling technique, which is placed on the roof of a small building in the climate of Crete – Greece. A pond is filled with water up to 0.10–0.12m deep while an aluminium layer is kept 0.15 above free water surface, allowing ventilation...

Solar thermophotovoltaic (STPV) is a light-electricity conversion system consisting of a solar concentrator, an emitter, a filter, PV cells and the cooling system. This paper is aimed at establishing a method for both purposes of design and performance analysis of the STPV device, which consists...

The compound-structure permanent-magnet synchronous machine (CS-PMSM) is a power-split device which can enable the internal combustion engine (ICE) to operate at optimum efficiency during all driving conditions by controlling its torque and speed. However, the CS-PMSM has more serious...

This paper presents a review study on the effects of sun tracking and cooling systems. So far, many studies (and case studies too) have been analyzed and evaluated in the literature. Existing studies show that sun tracking system is significantly affecting energy generation capacity of...

This paper describes the performance of an ejector cooling system driven by solar energy and R134a as working fluid. The system operating in conjunction with intermediate temperature solar collector in Athens, is predicted along the 5 months (May–September). The operation of the system and the...