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Mechanical Model Of A Floating Oscillating Water Column Wave Energy Conversion Device, Brad Stappenbelt, Paul Cooper
Mechanical Model Of A Floating Oscillating Water Column Wave Energy Conversion Device, Brad Stappenbelt, Paul Cooper
Faculty of Engineering - Papers (Archive)
The study of floating oscillating water column (OWC) wave energy conversion (WEC) device performance includes analysis of the dynamic coupling of the water column and the floating structure. In the present investigation, a mechanical oscillator model was proposed in order to examine this relationship for the heave motion of a floating wave energy conversion device. Characterisation of the dynamic system optimal behaviour was performed by examining the effect of relative OWC and floating structure natural frequencies, the phase relationships of the various system components and the optimal power take-off damping of the system. It was determined that separation of the …
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao
Faculty of Engineering - Papers (Archive)
The large primary–secondary chilled water systems often suffer from the excess flow demand and low chilled water temperature difference, which is known as the low ΔT central plant syndrome, during operation. This paper presents an approach for experimental validation of the possible utility of a check valve (i.e., putting a one-direction check valve in the chilled water by-pass line) to solve this operational problem and enhance the overall system performance, prior to a check valve is really installed. The experimental tests were carried out on the complex central chiller plant in a super high-rise building using a simulated check valve …
Strategy Of Water Pollution Prevention In Taihu Lake And Its Effects Analysis, Shuqing Yang, P.W. Liu
Strategy Of Water Pollution Prevention In Taihu Lake And Its Effects Analysis, Shuqing Yang, P.W. Liu
Faculty of Engineering - Papers (Archive)
Taihu Lake, the third largest freshwater lake in China, is located in the Chanjiang Delta of the Yangtze River. Its waters are used by agriculture, industry and as major drinking water for several cities including Shanghai and Wuxi. The lake also is important for tourism, aquaculture and flood control. Taihu Lake and its surrounding areas are facing three major water-related threats: deteriorating water quality with inflow and runoff from its watershed; flooding during the rainy seasons; and water shortages during drier months. Noxious algae blooms are occurring with increasing frequency and water quality continues to decline. Remedial actions implemented to …
Influence Of Feed Water Chemistry On The Removal Of Ionisable And Neutral Trace Organics By A Loose Nanofiltration Membrane, Long Nghiem
Faculty of Engineering - Papers (Archive)
This study examined the effects of feed water chemistry and membrane fouling on the rejection of trace organics by a loose nanofiltration membrane. One ionisable and one non-ionisable trace organics were selected for investigation. Results reported here indicate that the solution pH and ionic strength can markedly influence the removal of the ionisable trace organic compound sulfamethoxazole. These observations were explained by electrostatic interactions between the solutes and the membrane surface and by the speciation of the ionisable compound. On the other hand, no appreciable effects of solution pH and ionic strength on the rejection of the neutral compound carbamazepine …
Optimisation Of A Floating Oscillating Water Column Wave Energy Converter, Brad Stappenbelt, Paul Cooper
Optimisation Of A Floating Oscillating Water Column Wave Energy Converter, Brad Stappenbelt, Paul Cooper
Faculty of Engineering - Papers (Archive)
The analysis of floating oscillating water column (OWC) wave energy conversion (WEC) devices involves the coupled dynamics of the water column and the floating structure. In the present study, a mechanical oscillator model was used to examine this relationship for the heave motion of a floating wave energy conversion device. Optimal power take-off damping of the system was determined and the effects on maximum power capture examined. The influence of relative OWC and floating structure natural frequencies on OWC WEC device optimisation was also investigated.