Zamri Noranai

Effect of hybridized fiber wrapped around the aluminum tubes on the crushing performances

Nowadays, synthetic fibres for an example glass fibres is frequently used to wrap the metallic tubes in order to increase their load-bearing capacity. Due to environmental considerations and non-biodegradable behaviour, natural fibres or materials are increasingly used to replace synthetic fibres. The use of synthetic fibres can be minimized by combining them with natural fibres. Based on the literature survey, combining both fibres (synthetic and natural) for crushing applications are relatively new and therefore the main work of this paper is to present the crushing performances of hybridized fibres wrapped around the aluminium tubes when subjected to quasi-static crushing forces. Glass fibres are then combined with yarn kenaf fibres according to these volume fractions: 0, 25, 50, 75 and 100%. The hybridized fibres are wrapped around the tubes twice using different orientations [0o/0o], [15°/-15°], [30o/-30o] and [45o/-45o] included empty tubes before they are immersed into polyester resin bath. The composite tubes are then quasi-statically compressed using a constant cross-head displacement of 10mm/min. The force-displacement curves for each tube conditions are recorded automatically and analysed. The relation between hybridized fibbers and fibre orientations with crashworthiness parameters are investigated and discussed associating with their crushing mechanisms.

Energy Saving Measures for University Public Library: A Case Study of UTHM Library

Energy is an important source of power for human daily activity. Energy efficiency is measured by the productivity of the system which goes through under certain condition as to achieve results at optimum level. The basic purpose of this study is to reduce and save energy consumption in order to determine the energy efficiency of public university library. Thereby saving measures can be identified from the building services installed in the library. From the findings, there are two major system correlates which is mechanical and electrical system. Based on these systems, it could resolve intricacy issues regards to building efficiency by conducting an Energy Saving Measures (ESM) in context of Malaysia’s tropical setting. Lack of supervision and excessive wastage of energy will render inefficient in both systems which would decrease the optimum level of performance and reliability issues. The study emphasizes that energy conservation should be prioritized in order to avoid unregulated energy consumption. Hence, it could focus on the main streamline where energy efficiency is a possible and potential sustainable building in the present and future for better surroundings and standard quality of life.

Air Conditioner Unit with Thermal Energy Storage by Open Loop System

Energy is very important in our daily activity especially in commercial and industries sector. These requirements have increased from time to time and as the result it is significantly end up with high energy demand and high energy cost. Thermal Energy Storage (TES) can be used as an alternative solution to reduce high energy demand and to reduce energy cost. The main reason of using TES system is to shift high energy demand from peak period to off peak period. Meanwhile, for building owner is to reduce energy cost by take opportunity low cost energy during off peak period. The purpose of this study is to develop a split unit air conditioner by substituting the circulation system with chilled water. The research was conducted by fabricating an air-conditioning blower unit integrated with cool thermal energy storage. Chilled water was used as medium to stored cool thermal energy. Water pump was used to circulate chill water from storage tank to evaporator and return back to storage tank. Series of experiments were conducted to test cooling performance of the developed product to produce cooling effect inside a chamber room. The experiments were conducted in a chamber room located at Block C6, Universiti Tun Hussein Onn Malaysia. Finally, from experiment found 0.15 meter3 of chilled water had successfully maintained chamber design temperature more than 140 minutes.