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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Costelloe, Ben; Finn, Donal (2001)
Publisher: Dublin Institute of Technology
Types: Unknown
Subjects: evaporative cooling, cooling towers, low approach cooling towers, sensible cooling systems in buildings, meteorological test reference year for Dublin and Milan, new psychrometric test reference year, chilled ceilings, chilled beams, dry mode fan coil units, Architecture, Business, Construction Engineering, Education, Engineering, Environmental Design, Real Estate
Recent developments have prompted a review of evaporative cooling technology as an effective means of cooling modern deep plan buildings. Prominent among these developments is the success of high temperature sensible cooling systems, such as chilled ceilings, which require a supply of cooling water at 14 to 18°C. Crucial to the success of evaporative cooling technology, as a significant means of cooling in modern applications, is the ability to generate cooling water, in an indirect circuit, at a temperature which closely approaches the ambient adiabatic saturation temperature or wet bulb temperature. Recent research in this area has shown that it is feasible to generate such cooling water at a temperature of 3 K above the ambient adiabatic saturation temperature. While the frequency of ambient adiabatic saturation temperature occurrence can be obtained from meteorological sources, there is little published data and analysis on the potential for this form of cooling water generation, based on the approach temperatures which are now known to be feasible. This paper quantifies cooling availability for two European cities, Dublin and Milan and suggests a method of analysing such data for any world wide location for which suitable meteorological records are available. The paper, which is part of an ongoing research programme devoted to evaporative cooling, incorporates recent experimental research findings and bases the availability analysis on meteorological test reference weather year data, which has been published for 29 European locations. The results of this research confirm a major potential for the generation of cooling water by evaporative means, which can be used to provide effective cooling of modern deep plan buildings by means of contemporary water based sensible cooling systems, such as chilled ceiling panels and beams. While the technique offers most potential in locations with a Northern European temperate climate, it seems to have a significant potential to contribute to cooling in Southern European cities, during the non-Summer months and also at other times, particularly where load shaving and night time cooling and pre-cooling techniques are incorporated.
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