Browsing by Author "Wickramaratne, C"

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    item: SRC-Report
    Design and construction of a stirling engine
    Dharmawardane, UP; Sudeera, UPMADA; Wickramaratne, C; Wijesinghe, TM; Tissera, PDM
    Prof. R.A. Attalage and Dr.W.M.S.R.Weerasinghe of University of Moratuwa organized our group under the module ME420, with the goal of designing and modeling a Stirling engine that could be used to generate power for small scale applications. In order to develop a compact and low cost Stirling engine, a gamma type Stirling engine with simple regenerator and a rhombic mechanism was developed. Its target shaft power is 50 W at engine speed of 2000 rpm and mean pressure of 0.8 MPa using air as working gas. This report describes the outline of the engine design and the performance test. The test was done without load, using air in atmospheric condition. The results indicate that a higher performance heat exchanger and decreasing of mechanical loss are needed for the attainment of the target performance
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    item: Conference-Extended-Abstract
    A feasibility study on developing stirling engines in Sri Lanka
    (2006) Wickramaratne, C; Ranaweera, RKPS; Perera, ULIU
    Global environment protection has come to be more stringent recently, demanding efficient and environmental friendly engines. Adding to the fact of escalating oil prices, Stirling engine could have a major role to play
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    item: Conference-Extended-Abstract
    Thermal comfort performance monitoring for stationary vehicles under tropical climate
    (2006) Wickramasooriya, IPTS; Witharana, S; Wickramaratne, C; Perera, ULIU
    The thermal comfort in an automobile is provided by the air conditioning system. Generally, in city running, an automobile air conditioner consumes nearly 10% of the fuel burnt by the engine. With the use of shading devices and by parking the vehicle under shades, the heat gain into the vehicle can be minimised. Especially in warm tropical climates, the minimisation of heat gain is of paramount importance as excessive heat gain will result in high interior temperatures, which in turn will demand higher load on the air conditioner while the life of the vehicle interior gets shorter.