Experiments on the hydrodynamic performance of horizontal axis tidal current turbine and desalination of sea water

Zhao, Guang; Su, Xiaohui; Cao, Yao; Juncong, Su; Liu, Yan

doi:10.1002/er.3442

Cited by 10 publications

(1 citation statement)

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“…In regards to hydrokinetic power, which is electricity generated from water in motion, the current harvesting technology is almost entirely based on the use of water turbines, which transform the water's energy into mechanical energy, similar to the way wind turbines transform wind energy, and although they can vary in size and design, they are generally classified into three main types as vertical‐axis hydrokinetic turbines, horizontal‐axis hydrokinetic turbines, and oscillating‐foil hydrokinetic turbines . For readers interested in an up‐to date review on hydrokinetic energy conversion, see Laws and Epps …”

Section: Introductionmentioning

confidence: 99%

Hydrokinetic energy conversion using compliant surfaces

Arias

Heras

2019

Int J Energy Res

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Summary In this work, consideration is given for a novel technology based on the use of compliant surfaces (membranes) for hydrokinetic energy conversion (HEC) from residual waters where the use of traditional turbines is either not possible or strongly limited. Here, residual waters are understood as waters with a small total pressure difference relative to the surrounding environment that are not suitable to be turbined. Such waters encompass not only domestic or industrial waste water before being discharged into the sewer but also typical flows found in river waterways of small depth or even postturbined water. In summary, the proposed technology is based on the deliberated bifurcation of residual water into two streams separated by a compliant surface or membrane that equalizes the static pressure in both streams and also generates a relative velocity between them. As a result, Taylor instabilities translate into the oscillatory motion of the membrane, which can be transformed into output power. Utilizing linearized flow theory, an analytical expression for the extractable density power is derived. Experiments are carried out for a rectangular membrane, and the data obtained are quantitatively and qualitatively in good agreement with the theoretical model, where it is found that for typical residual water with a velocity of approximately 1.7 m/s, the output power density is on the order of 30 mW/cm2 based on the area of the membrane. Additional research and development is required to arrive at a reliable practical and commercial design.

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Section: Introductionmentioning

confidence: 99%