Comparison of Two Alternative Hydraulic PTOConcepts for Wave Energy Conversion

Comparison of Two Alternative Hydraulic PTOConcepts for Wave Energy Conversion
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用于波浪能转换的两种替代液压 PTO 概念的比较

DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Jochem Weber
Jochem Weber
中科院分区：
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文献类型：
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作者：
R. Costello;J. Ringwood;Jochem Weber

文献摘要

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用于波浪的液压动力输出（PTO）系统 能源通常分为两大类。首先， 可变压力系统， 力/扭矩通过压力调制实现，其次， 恒压系统，在该系统中， 力/扭矩通过在以下之间进行选择的阀转换来实现 离散努力水平由近似常数 蓄能器压力和替代活塞面积。能量存储 是恒压范畴不可或缺的，而在最纯粹的 对于变压器类型的形式，不提供。混合 组合了两类联合收割机元件的系统还 可能 本文报告了对最基本的系统的分析 从每一个类别中。分析使用耦合 水动力-水力时域模型应用该模型 评估流体动力吸收的有效性， 液压动力传输的效率。 结果表明，在每种情况下， 性能是一个关键的考虑因素， 任何一个系统的配置都取决于电机的选择。在 这两类PTO的最佳实例，表明 性能足够高，以促进 这样的系统。
Hydraulic Power Take Off (PTO) systems for wave energy usually fall into two broad categories. These are, firstly, variable pressure systems where control of the primary force/torque is achieved by pressure modulation, and secondly, constant pressure systems where control of the primary force/torque is achieved by valve transitions that select between discrete effort levels determined by the approximately constant accumulator pressure and alternative piston areas. Energy storage is integral to the constant pressure category while, in the purest form of the variable pressure category, it is not provided. Hybrid systems which combine elements of both categories are also possible. This paper reports an analysis of the most elementary of systems from each of these categories. The analysis uses a coupled hydrodynamic-hydraulic time domain model. The model is used to assess the effectiveness of the hydrodynamic power absorption and the efficiency of the hydraulic power transmission. The results show that, in each case, the hydraulic motor performance is a critical consideration and the optimal configuration of any one system is dependent on motor selection. In the best instances of both categories of PTO, the indicated performance is sufficiently high to facilitate commercial viability of such systems.