Irfan Abd Rahim
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/39307
2024-03-28T08:30:40ZInvestigation of a portable standing wave thermoacoustic heat engine
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34843
Investigation of a portable standing wave thermoacoustic heat engine
Normah, Mohd Ghazali, Assoc. Prof. Dr.; Irfan, Abd Rahim; Koh, K. S.; Manet, A.; Mohd Zaki, Ab. Muin, Prof. Dr.
Increasing the efficiency and effectiveness of energy systems remains as one of the critical issues today with depleting energy resources and increasing energy demand. Utilization of alternative fuels and utilization of waste heat has also become a major research area. This study reports an investigation on a development of a portable thermoacoustic heat engine that converts energy from a combustion process into acoustic power. The prime mover operates with a temperature gradient imposed on a celcor ceramic stack which then induced pressure oscillations. The system consists of a 42-cm long stainless steel alloy 304 tube with a diameter of 50 mm open at one end. A propane torch is used to model a potential heat source from biomass combustion. No hot heat exchanger is required while copper plates are used as the ambient heat exchanger. At 500°C, thermoacoustic effects and pressure oscillations have been observed with a calculated power of 50 W at the stack. The system which operates at atmospheric pressure with air as the working fluid indicates the potential in utilizing the heat produced from biomass combustion that is widely applied in the rural areas.
Link to publisher's homepage at www.elsevier.com/
2013-01-01T00:00:00ZInvestigation performance of heat exchanger on thermoacoustic heat engine for harvesting a waste heat
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/33699
Investigation performance of heat exchanger on thermoacoustic heat engine for harvesting a waste heat
Irfan, Abd Rahim; Mohd Saidin, Wahab; Mohd. Zubir, Yahaya; Mohd. Zarhamdy, Md. Zain
A green technology of acoustic of fluid-structure interactions become an emerging technology today, a call thermoacoustic heat engine. Thermoacoutics heat engine systems convert the energy on a harvesting from a waste heat energy and convert to an electrical energy. That component of devices a call a hot heat exchangers. This paper study was focused on a new design of thermoacoustics heat exchanger and investigation of its performance in terms of thermal analysis. A conceptual design was produced with three designs of hot heat exchangers, which are wire-type, finger-type and star-type. Commercial code ANSYS-CFX software are used on the evaluation, the heat exchanger’s designs were simulated with two thermal conditions which are steady state and transient heat conduction. Materialselection from copper and aluminium a chosen to look-out the engagement between theoretical and numerical study. There are three inlet temperatures that are assumed will be supplied by constant waste heat which are 200°C, 350°C and 500°C.The star-type design has the highest value of heat conduction through a fin heat conduction with copper as a material which is 32.84W. Star-type hot heat exchanger recorded the fastest time to distribute temperature compared to wiretype and fingertype heat exchanger. Result shown the combination between star-type design and copper material will produce a good agreement to design a hot heat exchanger.
Link to publisher's homepage at http://www.ttp.net/
2014-01-01T00:00:00Z