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Siti Maherah Hussin
Universiti Teknologi Malaysia

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Energy efficiency index by considering number of occupants: a study on the lecture rooms in a university building Noor Ameera Zakaria; Mohammad Yusri Hassan; Hayati Abdullah; Md Pauzi Abdullah; Faridah Hussin; Siti Maherah Hussin; Nur Najihah Abu Bakar
Indonesian Journal of Electrical Engineering and Computer Science Vol 15, No 3: September 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v15.i3.pp1154-1160

Abstract

The building sector is attributed to approximately 40% of the nation’s energy consumption and this accounts for a significant percentage of the nation’s energy consumption. For this reason, energy efficiency in buildings has now become an important subject in the national energy scenario. Energy Efficiency Index (EEI) is one of the energy consumption indicators that is widely used in the building sector for measuring energy performance. This index is generally measured based on the energy used per unit of building floor area. However, this index is not able to directly identify other factors affecting energy usage. This paper suggests an Energy Efficiency Index (EEI) for determining the performance of lecturer rooms in a university building. Unlike the conventional EEI, the proposed EEI determines the room’s energy usage performance by considering the number of occupants. The study was conducted at the Faculty of Electrical Engineering, Universiti Teknologi Malaysia (UTM) and the results show that the number of occupants significantly influences the energy usage performance of rooms in a university building.
Performance of a Small-sized Savonious Blade with Wind Concentrator Dygku. Asmanissa Awg. Osman; Norzanah Rosmin; Aede Hatib Mustaamal; Siti Maherah Hussin; Md Pauzi Abdullah
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v10.i3.pp1227-1233

Abstract

This paper presents the performance of a fabricated small-sized Savonious wind turbine with two blades. The design of Savonius vertical axis wind turbine (VAWT) was based on Malaysia wind speed condition. Meanwhile, the design of wind concentrator was based on the dimensions and the constant airflow of an air compressor. From the experimental testing in a laboratory, it was found that the proposed Savonious turbine has best performance when tested using wind concentrator. To conclude, airflow from air compressor can be increased when the proposed wind concentrator is used and hence increasing the proposed VAWT performance in terms of its angular speed (ω), tip speed ratio (TSR) and the generated electrical power (PE).
Impact of Different Time of Use Electricity Pricing Structure on Residential Consumer Nur Azrina Mohd Azman; Md Pauzi Abdullah; Mohammad Yusri Hassan; Dalila Mat Said; Faridah Hussin; Norzanah Rosmin; Siti Maherah Hussin
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v10.i3.pp1053-1060

Abstract

Load profile for residential users is different from commercial users where peak load occurs outside of work hours compared to working hours. Consequently, the Time of Use-based electricity price must be different not only in terms of price, but also in terms of time block structure. This paper examines the impacts of different TOU structures on TOU prices and load profiles of residential consumer. Four TOU structures are tested on the real load profile for a selected residential consumer area in Malaysia. Two elasticity factors are used for each structure to represent two different groups of users, a group that responds highly to price changes and a group that does not. The TOU price set for each structure is determined optimally subject to the following constraints; the price difference between the TOU and a fixed price per hour should be minimized and the amount of difference between price increase and price drop should be equal. From the analysis, the TOU structure with 12-time blocks provides better price signals and peak load reduction.
Co-Authors Aede Hatib Mustaamal Dalila Mat Said Dygku. Asmanissa Awg. Osman Faridah Hussin Hayati Abdullah Md Pauzi Abdullah Mohammad Yusri Hassan Noor Ameera Zakaria Norzanah Rosmin Nur Azrina Mohd Azman Nur Najihah Abu Bakar