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Articles 1 - 8 of 8
Full-Text Articles in Education
Improving Engagement Of Construction Industry Firms In Apprenticeship Training In A Post-Recession Economy, Eoghan Ó Murchadha, Roisin Murphy
Improving Engagement Of Construction Industry Firms In Apprenticeship Training In A Post-Recession Economy, Eoghan Ó Murchadha, Roisin Murphy
Conference papers
The Irish economy is currently experiencing a recovery phase following a ‘lost decade’ of growth due to the severe economic downturn of 2007. While the construction industry in Ireland is recording increased output, and improving rates of employment, in the vital economic and labour market sector of apprenticeship there is a significant lack of engagement. Without employer buy-in to apprenticeship training, there exists potential future skills gaps and lack of efficacy of the construction industry. This increasingly likely possibility is disquieting, not just for the possible impact upon the future of apprenticeship but also for the Irish economy as a …
Surveying Labour Market Trends: A Demand And Supply Analysis Of The Quantity Surveying Profession In Ireland, Roisin Murphy
Surveying Labour Market Trends: A Demand And Supply Analysis Of The Quantity Surveying Profession In Ireland, Roisin Murphy
Conference papers
The construction and property sectors in Ireland have undergone significant change over the past decade. From a period of sustained growth in output and employment to a recession returning to the current period of expansion. While the cyclical nature of the sector and consequential impact on the labour market is widely recognized, the impact on the quantity surveying profession specifically is comparatively less well evidenced. A widespread survey of employers was undertaken to ascertain recent employment trends and likely future demand for quantity surveyors. At the same time an analysis of current enrolments on surveying programmes across the country provided …
Sensitivity Studies Of A Low Temperature Low Approach Direct Cooling Tower For Building Radiant Cooling Systems, Medhi Nasrabadi, Donal Finn, Ben Costelloe
Sensitivity Studies Of A Low Temperature Low Approach Direct Cooling Tower For Building Radiant Cooling Systems, Medhi Nasrabadi, Donal Finn, Ben Costelloe
Conference Papers
Recent interest in cooling towers as a mechanism for producing chilled water, together with the evolution of radiant cooling, have prompted a review of evaporative cooling in temperate maritime climates. The thermal efficiency of such systems is a key parameter, as a measure of the degree to which the system has succeeded in exploiting the cooling potential of the ambient air. The feasibility of this concept depends largely however, on achieving low approach water temperatures within an appropriate cooling tower, at acceptable levels of energy performance. Previous experimental work for a full scale evaporative cooling system has shown that it …
Mathematical Modelling Of A Low Approach Evaporative Cooling Process For Space Cooling In Buildings, Medhi Nasrabadi, Donal Finn, Ben Costelloe
Mathematical Modelling Of A Low Approach Evaporative Cooling Process For Space Cooling In Buildings, Medhi Nasrabadi, Donal Finn, Ben Costelloe
Conference Papers
This paper describes a mathematical model of a low approach open evaporative cooling tower for the production of high temperature indirect cooling water (14-16°C) for use in building radiant cooling and displacement ventilation systems. There are several potential approaches to model evaporative cooling, including: the Poppe method, the Merkel method and the effectiveness-NTU (ε-NTU) method. A common assumption, applied to the Merkel and ε-NTU methods, is that the effect of change in tower water mass flow rate due to evaporation is ignored, which results in a simpler model with reduced computational requirements, but with somewhat decreasedaccuracy. In this paper, a …
Dublin 7., Irish Independent Newspaper
Dublin 7., Irish Independent Newspaper
Media
Proximity to the new DIT campus at Grangegorman is one of the principal attractions of a new development which goes on view for the first time tomorrow between 2-4pm.
Thermal Performance Of Low Approach Evaporative Cooling Systems In Buildings, Ben Costelloe, Donal Finn
Thermal Performance Of Low Approach Evaporative Cooling Systems In Buildings, Ben Costelloe, Donal Finn
Conference Papers
Meteorological enthalpy analysis of temperate and maritime climates above 45˚N suggests that the water-side evaporative cooling technique has considerable unrealised potential with contemporary "high temperature" building cooling systems - such as chilled ceilings. As low approach conditions are the key to exploiting the cooling potential of the ambient air, thermal performance at such conditions needs to be investigated. To address the research issues a test rig, based on an open cooling tower and plate heat exchanger and designed to maximise evaporative cooling potential, has been constructed at DIT. A combination of experimental measurement and analysis is used in the investigations. …
Thermal Efficiency Characteristics Of Indirect Evaporative Cooling Systems, Ben Costelloe, Donal Finn
Thermal Efficiency Characteristics Of Indirect Evaporative Cooling Systems, Ben Costelloe, Donal Finn
Conference Papers
Recent developments in enhancing heat transfer in cooling towers, together with the success of chilled ceilings, have prompted a review of the evaporative cooling technique. in temperate maritime climates. The thermal efficiency of such systems is a key parameter, as a measure of the degree to which the system has succeeded in exploiting the cooling potential of the ambient air. This paper presents the results of experimental research into the thermal efficiency of a water-side open indirect evaporative cooling test rig designed to achieve low (1-4 K) approach conditions. Secondary efficiencies in the range 0.24-0.76 have been achieved.
Evaporative Cooling Availability In Water Based Sensible Cooling Systems, Ben Costelloe, Donal Finn
Evaporative Cooling Availability In Water Based Sensible Cooling Systems, Ben Costelloe, Donal Finn
Conference Papers
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 …