Low energy, wind catcher assisted indirect-evaporative cooling system for building applications

Elzaidabi, Abdalla Ali Mohamed (2009) Low energy, wind catcher assisted indirect-evaporative cooling system for building applications. PhD thesis, University of Nottingham.

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Abstract

Increased consciousness of the environmental problems has aroused people’s interest of renewable energy systems, especially the application of green features in buildings.

The demand for air conditioning / cooling in domestic and non-domestic buildings is rising throughout the world; this increases the reliance on conventional fuels and the global warming effect from greenhouse gas emissions. Passive cooling and energy efficient design can substantially reduce reliance on fuel based heating and cooling. Passive and Hybrid Downdraught Cooling, in different forms, is now technically viable in many parts of the world. This has been established through a combination of research projects.

In some hot arid regions, a major part of the energy consumed consists of air-conditioning requirements. Alternative methods, using passive cooling techniques, can assist in reducing the conventional energy consumption in buildings. Evaporative cooling, which can be tracked back several hundreds of years in ancient Egypt and Persia [1–3], is one of the most effective strategies, because of the enormous latent heat needed for evaporation of water.

Green features are architectural features used to mitigate migration of various air-borne pollutants and transmission of air from outside to indoor environment in an advantageous way [9].

The reduction of fossil fuel consumption and the associated decrease in greenhouse gas emissions are vital to combat global warming and this can be accomplished, in part, by the use of natural ventilation. To assess the performance of several innovative cooling systems devices and to develop improved models for more established technology, quantitative measurement of output was necessary. This was achieved in this study by the development of simply constructed low energy cooling systems which were calibrated by the innovative use of wind and water as a source. These devices were found to be consistent and accurate in measuring the temperature and cooling load from a number of devices. There were some problems in the original evaporative units. Therefore, a number of modifications have to be made to enhance the systems performance. The novel Windcatcher – PEC cooling system was assessed and different cooling loads were achieved.

Item Type: Thesis (University of Nottingham only) (PhD)
Supervisors: Riffat, Saffa
Keywords: air conditioning, wind catcher, energy conservation, evaporative cooling, building, architecture
Subjects: T Technology > TH Building construction > TH7005 Heating and ventilation. Air conditioning
Faculties/Schools: UK Campuses > Faculty of Engineering > Built Environment
Item ID: 10703
Depositing User: EP, Services
Date Deposited: 09 Dec 2009 08:50
Last Modified: 14 Sep 2016 08:41
URI: http://eprints.nottingham.ac.uk/id/eprint/10703

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