Browsing by Author "Taylor, A. B."

Now showing 1 - 3 of 3
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    Computer simulation of internal combustion engine flow processes
    (South African Institution of Mechanical Engineers, 2002) Van Vuuren, C. M.; Thiart, G. D.; Taylor, A. B.
    A computer code for the simulation of internal combustion engine processes is presented. The main objective of the code is to serve as a tool for the design of inlet and outlet manifolds of combustion engines. The code is built around a two-zone thermodynamic combustion model that is linked to a quasi one-dimensional unsteady method of characteristics pipe flow model and a camshaft model. Two simple test cases are presented to show that the pipe flow model functions correctly. Predictions of the crankshaft power delivered by a commercial internal combustion engine computed by means of the code are shown to compare favourably with measured results. An example illustrating the usefulness of the code as a design tool is also presented.
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    Stainless steel finned tube heat exchanger design for waste heat recovery
    (Energy Research Centre, University of Cape Town, 2006) Wipplinger, K. P. M.; Harms, T. M.; Taylor, A. B.
    Around the world the implementation of heat recovery systems play an increasingly important role in the engineering industry. Recovered energy is utilised in production plants (especially in the food industry) and saves companies millions in expenses per year. Waste heat recovery associated with hydrocarbon combustion in the transport industry is identified as a significantly under-utilised energy resource. The aim of this project was to investigate the recovery of waste heat in a small scale system for the purpose of electrical conversion in order to serve as a secondary energy source. A theoretical analysis concerning the design and construction of the system, utilising researched theory and a control- volume-based simulation program of the recovery system, is presented. It was found that heat exchangers for the required duty are not readily available in South Africa. A high pressure, cross flow, stainless steel finned tube heat exchanger with a water side pressure rating of 2 MPa was therefore designed and constructed. By using the exhaust gases of a continuous combustion unit as an energy source and water as the working fluid, efficiencies of up to 74% in direct steam generation testing were obtained.
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    Theoretical modelling and experimental verification of the heat transfer behaviour of a water-charged closed-end loop pulsating heat pipe
    (2001) Swanepoel, G.; Dobson, R. T.; Taylor, A. B.
    ENGLISH ABSTRACT: In this paper the theoretical modelling of a Pulsating Heat Pipe (PHP) is presented. In this particular model the flow of the working fluid is modelled as discrete liquid plugs moving back and forth because of the evaporation and condensation processes taking place inside of the PHP. A PHP was manufactured to determine the heat transfer rate of the PHP experimentally and to compare the experimental results with the theoretical results. The average heat transfer rate predicted by the theoretical model in the top heat mode was 62 W compared to the experimental value of 60 W. In the bottom heat mode the average theoretical predicted heat transfer rate was 86 W compared to the experimental determined value of 65W.