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首页> 外文期刊>American journal of engineering and applied sciences >A novel prototype of a small-scale solar power plant: Dynamic simulation and thermoeconomic analysis
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A novel prototype of a small-scale solar power plant: Dynamic simulation and thermoeconomic analysis

机译：小型太阳能发电厂的新型原型：动态模拟和热经济分析

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The paper presents an innovative prototype of a solar power plant, purposely designed for small-scale applications such as residential and/or small commercial buildings. The system consists of 10 kW_e Organic Rankine Cycle (ORC) plant and innovative solar thermal collectors. In particular, 235 m~2 of flat-plate evacuated solar collectors are designed to heat diathermic oil up to 180°C. A variable volume pump is managed by a feedback controller in order to obtain the desired outlet set point temperature for the different weather/load conditions. The hot diathermic oil passes through a storage tank, which is adopted with the purpose to reduce the oscillations due to the solar radiation variability. By means of the tank, a better exploitation of solar energy is also achieved, reducing the time-shift between production and demand. For achieving a constant ORC inlet temperature the tank outlet hot diathermic oil passes through a gas-fired burner, which provides auxiliary additional thermal energy. Therefore, the ORC simultaneously produces electrical energy and low temperature (45°C) cogeneration heat. This solar power plant was dynamically simulated in TRNSYS environment. The simulation tool includes a novel model in order to simulate the dynamic thermal behavior of solar collectors, whereas the ORC dynamic was simulated by means of a performance data map provided by the manufacturer. The model also includes a tool for the calculation of energy and economic parameters and the evaluation of the optimum thermoeconomic configuration. Results indicated that the best pay-back period is obtained for a solar field area of about 200 m~2 and a solar fraction of about 75%. Nevertheless, the system may be competitive from the economic point of view only if incentives can be made available, as commonly occurs for renewable applications, i.e., solar systems. This prototypal system aims to become a potential solar power system for small residential and/or commercial buildings. The presented study will be suitably used as a basis for the installation of a working prototype in located Naples, Italy.
机译：本文介绍了一种太阳能发电厂的创新原型，该发电厂是专为小型应用（例如住宅和/或小型商业建筑）设计的。该系统由10 kW_e有机朗肯循环（ORC）工厂和创新的太阳能集热器组成。特别是，设计了235 m〜2的平板式真空太阳能收集器，可将透热油加热到180°C。变量泵由反馈控制器管理，以便针对不同的天气/负载条件获得所需的出口设定点温度。热的透热油通过一个储罐，该储罐的目的是减少由于太阳辐射的可变性而引起的振荡。通过水箱，还可以更好地利用太阳能，从而减少了生产和需求之间的时间转移。为了达到恒定的ORC入口温度，储罐出口的热透热油通过燃气燃烧器，该燃烧器提供了辅助的附加热能。因此，ORC同时产生电能和低温（45°C）热电联产热。该太阳能发电厂在TRNSYS环境中进行了动态仿真。该仿真工具包括一个新颖的模型，以仿真太阳能收集器的动态热行为，而ORC动力学是通过制造商提供的性能数据图进行仿真的。该模型还包括一个用于计算能源和经济参数以及评估最佳热经济配置的工具。结果表明，对于约200 m〜2的太阳场面积和约75％的太阳分数，可获得最佳的投资回收期。然而，从经济的角度来看，该系统只有在可以提供激励的情况下才具有竞争力，这在可再生应用即太阳能系统中通常会发生。该原型系统旨在成为小型住宅和/或商业建筑的潜在太阳能系统。提出的研究报告将适合作为在意大利那不勒斯安装工作原型的基础。

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