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Shah Alam, Malaysia

Jumien N.A.,University Technology of MARA | Hussin M.Z.,University Technology of MARA | Omar A.M.,University Technology of MARA | Zulkapli M.F.,Renewable Energy Research Center
Proceedings - 2015 6th IEEE Control and System Graduate Research Colloquium, ICSGRC 2015 | Year: 2015

This paper presents the performance of Grid-Connected Photovoltaic (GCPV) system contains of 50 modules using monocrystalline PV technology with the total nominal array power of 2.85 kWp. This GCPV system was installed at Blok 15, SIRIM Berhad, Shah Alam, Malaysia. After 14 years of operation under Malaysia's climate, the result was evaluated. Based on the result obtained, it have shown that average performance ratio (PR) of 53% after 14 years of operation under outdoor exposure. According to new findings, several factors such as temperature, browning effect, cable lost lifetime (15.8%), dust and dirt (1.8%) and aging factor (29.4%) has been identified as major factors that affect the performance of system. These factors contributed to the decrement on the PV performance under this climate. © 2015 IEEE. Source

Ghani A.A.A.,University Technology of MARA | Hussin M.Z.,University Technology of MARA | Sulaiman S.I.,University Technology of MARA | Zulkapli M.F.,Renewable Energy Research Center
Proceedings - 2015 6th IEEE Control and System Graduate Research Colloquium, ICSGRC 2015 | Year: 2015

This study analyses the performance of a 1.2 kWp thin-film, grid-connected photovoltaic system located at Renewable Energy Research Centre (RERC), SIRIM Berhad, Shah Alam, Malaysia. The effect of amorphous-Silicon (a-Si) thin-film photovoltaic (PV) module technology response was analyzed under Malaysia climate. The performance of GCPV system was evaluated by investigating the performance ratio (PR) under Standard Test Condition (STC). From the results, the average PR was measured at 97% after one year of operation. In this study, there are several factors such as dirt and dust accumulation, temperature, shade and degradation that influenced the performance of the PV array. All parameters such as location, tilt angle, orientation, degradation and shading were taken into an account. © 2015 IEEE. Source

Bensaleh S.,Royal Adelaide Hospital | Bensaleh S.,University of Adelaide | Bensaleh S.,Renewable Energy Research Center | Bezak E.,Royal Adelaide Hospital | Bezak E.,University of Adelaide
Australasian Physical and Engineering Sciences in Medicine | Year: 2010

The MammoSite® breast high dose rate brachytherapy is used in treatment of early-stage breast cancer. The tumour bed volume is irradiated with high dose per fraction in a relatively small number of fractions. Uncertainties in the source positioning and MammoSite balloon deformation will alter the prescribed dose within the treated volume. They may also expose the normal tissues in balloon proximity to excessive dose. The purpose of this work is to explore the impact of these two uncertainties on the MammoSite dose distribution in the breast using dose volume histograms and Monte Carlo simulations. The Lyman-Kutcher and relative seriality models were employed to estimate the normal tissues complications associated with the MammoSite dose distributions. The tumour control probability was calculated using the Poisson model. This study gives low probabilities for developing heart and lung complications. The probability of complications of the skin and normal breast tissues depends on the location of the source inside the balloon and the volume receiving high dose. Incorrect source position and balloon deformation had significant effect on the prescribed dose within the treated volume. A 4 mm balloon deformation resulted in reduction of the tumour control probability by 24%. Monte Carlo calculations using EGSnrc showed that a deviation of the source by 1 mm caused approximately 7% dose reduction in the treated target volume at 1 cm from the balloon surface. In conclusion, accurate positioning of the 192Ir source at the balloon centre and minimal balloon deformation are critical for proper dose delivery with the MammoSite brachytherapy applicator. On the basis of this study, we suggest that the MammoSite treatment protocols should allow for a balloon deformation of≤2 mm and a maximum source deviation of ≤1 mm. © Australasian College of Physical Scientists and Engineers in Medicine 2010. Source

Tosha T.,Institute for Geo Resources and Environment | Sakaguchi K.,Renewable Energy Research Center
AIST Today (International Edition) | Year: 2014

The impact of large-scale developments like those of geothermal power plants on hot springs, is ongoing cause for concern. The use of heat pumps allows heating and cooling in areas where it is difficult to use ground heat sources with previous technology. In the case of photovoltaic power generation, the amount of power that can be generated at a particular location can be calculated approximately by measuring the solar insolation and daylight hours. Using the 'Geothermal Potential Map in Japan' published by AIST, it is possible to evaluate geothermal resources. It is estimated that if all the geothermal reservoirs of 150°C or above throughout Japan were developed without restrictions. AIST is currently engaged in research aimed at creating an improved geothermal resource map. Source

Yasukawa K.,Renewable Energy Research Center
AIST Today (International Edition) | Year: 2014

A development project should not adversely impact any of the hot springs in the surrounding area. And, indeed, there have been cases in which geothermal energy development projects have been delayed or stopped due to objections from hot spring owners, who fear that such projects could damage their natural hot springs. Virtually all development types, including geothermal energy, have some impact on the surrounding environment. In addition, it was also proposed that the promotion of power generation using existing hot springs could be effective in PA activities. From FY2010 to 2012, GREEN also participated in another study for MOE as part of the same initiative. If the surrounding hot springs continue to be monitored after the geothermal energy development project is completed, this means there will be continuing regular check ups. Source

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