Shahrani Anuar

Study of Effect of Thermal Diffusivity on Ground Temperature for Malaysian Climate

Ground has been proven that it is able to supply cooling and heating resulting in significant reduction of electricity consumption. This paper discusses potential of ground towards implementation of ground thermal storage by using ground heat exchanger (GHE) to supply passive cooling for any application. Analysis has been conducted based on empirical equation from conduction heat transfer for depth up to 6 m and thermal diffusivity from 0.04 to 0.1 m2/day. The main input parameters were obtained from local weather station for three consecutive years. The results showed that significant reduction of temperature occur at depth below than 2.0 m in which cooling can be supplied constantly throughout the year. Temperature amplitude also gets attenuated relatively with depth in which amplitude less than 1°C occur at depth more than 4 m for thermal diffusivity 0.04 m2/day. In addition, thermal diffusivity plays important role in determining ground temperature variation. It has been obtained that the temperature amplitude significantly increase when the thermal diffusivity increase. Therefore, this paper had suggested that the application of GHE should be placed in condition of thermal diffusivity 0.06 m2/day and below.

Simulation Model to Assess Electrical Power Generation from Tidal Basin in Coastal Area of Malaysia

This article studies the numerical simulation of power generation in four different tidal stations in the East Coast region of Malaysia. The tidal stations are Tanjung Sedili, Tanjung Gelang, Tioman and Cendering. The simulation model is based on power generation using tidal barrage. Ebb, flood and double-mode generations were studied. The tidal basin area was estimated by approximation to generate sufficient electricity for local community consumption. Thus, a different basin area was estimated for every location as each location has different population size. Single-flow generation was assumed for ebb and floor generations with 40% barrage efficiency while bi-directional generation was assumed for double-mode generation with 30% barrage efficiency. Double-mode generation has the highest power generation among the three different methods. Tanjung Gelang has the highest average tidal range difference. However, Pulau Tioman is more suitable to have the tidal barrage as the local community population is smaller, thus, requiring a smaller basin area to generate sufficient electricity to meet the demand of local community. On average, tidal barrage with a basin area of 0.3km2 in Pulau Tioman will be able to generate 13.74 GWh annually.

A study on the power generation potential of mini wind turbine in east coast of Peninsular Malaysia

A small-scale wind turbine is an attractive renewable energy source, but its economic viability depends on wind speed. The aim of this study is to determine economic viability of small-scale wind turbine in East Coast of Peninsular Malaysia. The potential energy generated has been determined by wind speed data and power curved of. Hourly wind speed data of Kuantan throughout 2015 was collected as the input. Then, a model of wind turbine was developed based on a commercial a 300W mini wind turbine. It was found that power generation is 3 times higher during northeast monsoon season at 15 m elevation. This proved that the northeast monsoon season has higher potential in generating power by wind turbine in East Coast of Peninsular Malaysia. However, only a total of 153.4 kWh/year of power can be generated at this condition. The power generator utilization factor PGUI or capacity ratio was merely 0.06 and it is not technically viable. By increasing the height of wind turbine to 60 m elevation, power generatio...

Characterization and Development of Geldart’s Fluidizing Velocity Profile of Sand Particles for the Application in Fluidized Bed Combustor (FBC)

The objective of this study is to fully utilize the local sand retrieved from Pahang river as a bed material in FBC. The proposed work will study through experiments to deduce a new classification of local river sand in a fluidized bed based on the minimum fluidization velocity of inert particles according Geldart’s classification operated at five different temperatures: 55, 82, 108, 124 and 148 °C respectively. River sand was chosen as a fluidizing medium due to its characteristics that can withstand high operating temperature of more than 1000 °C. Apart from that, its cheap cost and availability make it preferred choice for the operation. The results show that the minimum fluidizing velocity of the sand, \( U_{\text{mf}} \) was found increasing as the temperature increased for the sands operated at low temperature, but maintaining almost at the same value, for the sands operated higher operating temperature respectively. The findings agree well with the reported trend by previous authors, in which their results based on the bed operated at combustion temperature which is above 800 °C. Thus, it can be conclude that the local sands, will exhibits the same trend for the application of fluidized bed combustor.

Simulation Model to Assess Tidal Potential Energy in East Coast of Malaysia Using GIS

This article studies the GIS simulation of yearly power generation in five different tidal stations in the East Coast region of Malaysia. The tidal stations are Geting, Tanjung Gelang, Tioman, Tanjung Sedili and Cendering. The tidal station in Geting is not analysed in this study because the tidal range is insignificant. After analysing the lagoons nearby to the four tidal stations, Tanjung Gelang and Tanjung Sedili are chosen in this study based on their natural characteristics and geomorphology of lagoons. The simulation model is based on yearly power generation using tidal barrage. This article also looks into the model in terms of mapping using GIS software to obtain bathymetry and tidal range data. Bathymetry data in GIS format is obtained from NOAA (National Oceanic and Atmospheric Administration) and tidal range data is obtained from ‘Jabatan Ukur dan Pemetaan Malaysia’. The latest tidal data up to date is the year 2011. The minimum depth of tidal basin should be 3.0 meter. Using GIS software to analyse bathymetry and tidal range data, the results are then combined to find yearly generation power output in the two tidal stations and are plotted in one map for each tidal station. The area of basin in Tanjung Gelang and Tanjung Sedili are 17.736 km2 and 27.919 km2. The calculation includes the important parameters such as area of basin, tidal range, number of tide cycles per year, and number of hours per tide. From the results and analysis, it is concluded that Tanjung Sedili and Tanjung Gelang produce 1.528 x 108 kWh and 1.294 x 108 kWh as their yearly power generation in 2011.

Study on the Application of Fit-Viability Framework for Renewable Energy Technology Evaluation

Malaysia has an abundance of renewable energy resources. However, the implementation proved to be difficult, as many factors have to be considered, mainly economical factor. Furthermore, currently there is no known framework to establish the feasibility study of renewable energy technology implementation. This paper serves as an initial study on the application of fit-viability framework for the implementation of RE technology, focussing in Malaysia. A simple case study has been performed based on the Feed-in Tariff mechanism, an the fit-viability framework proved to be useful in RE technology consideration.