The integration of solar thermal energy into a coal-fired power plant is one of the best ways to reduce the environmental impact of the latter linked to the release of carbon dioxide (CO2) into the atmosphere. In this paper, solar energy is used before the boiler, just after the first high-pressure feed water heater via a solar preheater (Water/Heat Transfer Fluid exchanger). It should be noted that in this study, there is no feed water heater displacement, and so the plant will operate in pure fuel-saving mode. To carry out an analysis of the integration of solar thermal energy in a coal-fired power plant, a 330 MW Solar Aided Coal Power Plant (SACPP) in northern Niger was studied. The results bring out that the annual solar energy production is 208 GWh, and solar energy can contribute up to approximately 15 % in the production of electricity. The considered SACPP significantly reduces the environmental impact of coal-fired power plants, leading to a reduction in CO2 emissions of around 381358 tons/year. In addition, the annual energy production cost from solar energy in the hybrid system is obtained as 0.0357 $/kWh and the investment payback period is around 12 months.

中文翻译：

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位于尼日尔的 330 MW 太阳能辅助燃煤发电厂的热力学、经济和环境性能评估


将太阳能热能整合到燃煤发电厂中是减少燃煤发电厂对环境影响的最佳方法之一，该影响与二氧化碳 （CO2） 释放到大气中有关。在本文中，太阳能在锅炉之前使用，就在第一个高压给水加热器之后，通过太阳能预热器（水/传热流体交换器）。应该注意的是，在本研究中，没有给水加热器位移，因此工厂将以纯节油模式运行。为了对太阳能热能在燃煤发电厂中的整合进行分析，对尼日尔北部的一座 330 MW 太阳能辅助燃煤发电厂 （SACPP） 进行了研究。结果表明，太阳能年产量为 208 GWh，太阳能在电力生产中的贡献高达 15% 左右。所考虑的 SACPP 显着减少了燃煤电厂对环境的影响，从而减少了约 381358 吨/年的二氧化碳排放量。此外，混合动力系统中太阳能的年能源生产成本为 0.0357 美元/千瓦时，投资回收期约为 12 个月。