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Optimal production of power from mid-temperature geothermal sources: Scale and safety issues

机译：中温地热能源的最佳发电：规模和安全问题

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In this work we have optimized the operation of a geothermal facility. Benzene, toluene and cyclohexane are selected as candidate fluids based on previous studies. We formulated a superstructure optimization problem for the optimal use of geothermal energy using a binary cycle with either one or two turbine expansions. Surrogate correlations for the thermodynamic properties of the fluids have been developed (i.e. enthalpy, entropy) to model the operation of the turbine and the heat exchanger network. A single economic objective and a normalized multiobjective function accounting for economic, environmental and safety issues are used. The economic optimization selects a two expansion cycle using toluene as organic fluid, producing 10.4 MW at 0.075 (sic) kWh with an investment of 102 M(sic) Safety considerations slightly change the operating conditions, reducing the pressures and temperatures, but not the selection of the working fluid. Sustainable and economic terms overcome safety issues. The results are competitive with other renewable-based technologies for thermal power production such as CSP or biomass.
机译：在这项工作中，我们优化了地热设施的运行。根据先前的研究，选择苯，甲苯和环己烷作为候选流体。我们针对具有一个或两个涡轮机膨胀的二元循环，为地热能的最佳利用制定了上层建筑优化问题。已经开发出用于流体的热力学性质的替代相关性（即，焓，熵）以对涡轮和热交换器网络的运行进行建模。使用了解决经济，环境和安全问题的单一经济目标和规范化的多目标函数。经济上的优化选择了使用甲苯作为有机流体的两个膨胀周期，以102,000（sic）的投资以0.075（sic）kWh的功率生产10.4 MW安全考虑因素会稍微改变运行条件，降低压力和温度，但不选择工作流体。可持续和经济术语克服了安全问题。结果与CSP或生物质能发电等其他基于可再生能源的技术相比具有竞争力。

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