/library/oar/handle/123456789/53031 Sun, 28 Dec 2025 05:41:25 GMT 2025-12-28T05:41:25Z /library/oar/handle/123456789/55236 Title: Determining site wind conditions based on a turbine's power output Abstract: When conducting a site evaluation of an installed wind turbine it is necessary to analyse site-specific wind measurements to gauge the turbine site's resource and electricity production potential. These measurements would need to be correlated to a long-term wind records collected from the vicinity, to conduct a reliable long-term assessment. However, wind measurements for the turbine site may be unavailable. Description: M.SC.SUS.ENERGY Tue, 01 Jan 2019 00:00:00 GMT /library/oar/handle/123456789/55236 2019-01-01T00:00:00Z /library/oar/handle/123456789/55149 Title: Modelling the electrical system of a multi-bladed wind turbine Abstract: The Chicago-type wind-driven water pumps have been utilized for many years in the rural areas of Malta to draw water from the aquifer for irrigation purposes. Many of these pumps still exist across Malta and Gozo. The Maltese Government, in tandem with the University of Malta represented by the Institute for Sustainable Energy and the Faculty of Engineering, have worked together for the last few years on the design, construction and testing of a small multi-bladed wind turbine. The aim of this collaboration was to design, construct and test a new Wind Energy Conversion System (WECS) to generate electricity. Description: M.SC.SUS.ENERGY Tue, 01 Jan 2019 00:00:00 GMT /library/oar/handle/123456789/55149 2019-01-01T00:00:00Z /library/oar/handle/123456789/55148 Title: Typical meteorological year for solar radiation in Malta Abstract: The availability of accurate data is important for the creation of models used to assess the energy performance of buildings and energy generated by solar systems. However, the collection of long-term meteorological data, such as solar radiation, can be a challenging endeavour. Thus, representative data of different locations, based on historical data can be used to create a typical meteorological year and this can be used reliably in modelling systems and simulating buildings in different software packages. So far, Malta does not have a publicly available Meteorological year for solar radiation. All weather files that are currently used in different software are either based on short-term averages, interpolation between meteorological stations around Malta or approximations based on weather stations in CozzoSpadaro, Sicily, Italy. In this dissertation the typical meteorological solar radiation year is created for Malta, based on three different methodologies. These are the Sandia National laboratory method, the Danish method and the Festa-Ratto method. These three methodologies were applied to eleven years of solar data measured in Malta between 2007 and 2017, both years included. This final result was a set of three different TMYs, which were compared to each other and to the long term average of solar radiation as obtained from measured data. This was done to find out which method produced a TMY that was the most representative of Malta’s yearly solar radiation. Although all three gave results that were close to the long-term average, the TMY generated by the Danish method was deemed to give the best representation. Based on this TMY, it was possible to also calculate the average clearness index and diffuse fraction for Malta. The correlation between them was found by means of a best-fit equation. These two indices depict the ratio of solar radiation that makes it through the atmosphere and the fraction of which is diffuse radiation, respectively. Such correlations can be used to compare the solar climate of Malta to other sites around the world that use this standardised international method. Description: M.SC.SUS.ENERGY Tue, 01 Jan 2019 00:00:00 GMT /library/oar/handle/123456789/55148 2019-01-01T00:00:00Z /library/oar/handle/123456789/55147 Title: Feasibility of a heat recovery system in an office building in Malta Abstract: Buildings account for 40% of total primary energy consumption in the EU and have great energy savings potential. Given the requirement to ensure that indoor air quality meets EN 15251 standard, it has become common practice for offices to install mechanical ventilation. It is widely believed that introduction of heat recovery systems can reduce energy consumption and has therefore become standard practice in today's applications. Description: M.SC.SUS.ENERGY Tue, 01 Jan 2019 00:00:00 GMT /library/oar/handle/123456789/55147 2019-01-01T00:00:00Z