Enhanced power generation through integrated renewable energy plants: Solar chimney and waste-to-energy
Enhanced power generation through integrated renewable energy plants: Solar chimney and waste-to-energy
复制标题
DOI：
10.1016/j.enconman.2018.04.010
复制
发表时间：
2018-06
影响因子：
10.4
通讯作者：
A. Habibollahzade;E. Houshfar;M. Ashjaee;Amirmohammad Behzadi;E. Gholamian;H. Mehdizadeh
中科院分区：
文献类型：
--
作者：
A. Habibollahzade;E. Houshfar;M. Ashjaee;Amirmohammad Behzadi;E. Gholamian;H. Mehdizadeh
提出了一种提高太阳能烟囱发电系统夜间发电量和解决夜间发电不稳定问题的新方法。为此，提出了一种集成的可再生循环，它结合了两种技术：太阳能烟囱和垃圾发电。通过利用冷凝器出口的热空气进入SCPP来进行组合。对德黑兰垃圾发电厂进行了热力学分析，得到了冷凝器冷却空气的质量流量，结果表明，通过将城市生活垃圾（MSW）的湿度从40%降低到30%，或增加MSW进料量，（0.934-1.146 kg/s）时，凝汽器冷却空气的质量流量从190.3 kg/s增加到233.7 kg/s。此外，通过在所述范围内增加进料速率或通过降低MSW的湿度，WTE设备的净功率输出从1350 kW增加到1650 kW。提出了冷凝器出口温空气进入SCPP的最佳喷射方式。随后，在不同的月份检查平均功率增加，并进行参数研究，以评估有效WTE参数和气象变量对SCPP的功率输出的影响。SCPP的最终功率达到20-70 kW（即使在一年中最热的夜晚，相对湿度为5%），与无喷射的情况相比，增加了20-1200%和65-94%（月平均）。结果表明，在集成系统中，通过增加22%的垃圾进料速率（从0.934 kg/s到1.146 kg/s）或通过降低垃圾含水量（从40%到30%），WTE工厂和SCPP的功率输出分别增加了22%和7%。此外，周围空气的相对湿度可以使SCPP的发电量增加25%。此外，研究结果表明，风速高于12.5 m/s不会影响SCPP的发电量，而周围空气的相对湿度，环境温度，垃圾进料速率和垃圾的湿度对SCPP的发电量有相当大的影响。平均而言，总能量和有用的火用效率的建议系统增加了0.15%和0.12%相比，独立的WTE工厂在夜间。SCPP与WTE工厂的集成是一种适用的方法，以提高发电量，并克服SCPP在夜间发电量不一致的问题。
In the present paper, a novel method is proposed to enhance the power production and resolve the inconsistent electricity generation of solar chimney power plants (SCPPs) during nighttime. For this purpose, an integrated renewable cycle is proposed by incorporating two technologies: solar chimney and waste-to-energy. The combination is performed by exploiting the warm air of the condensers outlet into the SCPP. The waste-to-energy (WTE) plant in Tehran is thermodynamically analyzed and the mass flow rate of the condensers cooling air is found. Results indicate that by decreasing the humidity of the municipal solid waste (MSW) from 40% to 30% or by increasing MSW feeding rate (0.934–1.146 kg/s), the mass flow rate of the condenser cooling air increases from 190.3 kg/s to 233.7 kg/s. In addition, by increasing the feeding rate or by decreasing the humidity of MSW in the mentioned range, net power output of the WTE plant increases from 1350 kW to 1650 kW. The best injection method is proposed for the warm air of the condensers outlet into the SCPP. Subsequently, the average power increase is examined in different months and parametric study is performed to assess the influence of the effective WTE parameters and meteorological variables on the power output of the SCPP. The final power of the SCPP reaches 20–70 kW (even at the hottest night of the year with 5% relative humidity) and increases 20–1200% and 65–94% (monthly average) compared to the case of without injection. Results demonstrate that in the integrated system, by a 22% increase in the MSW feeding rate (from 0.934 kg/s to 1.146 kg/s) or by decreasing the MSW moisture content (from 40% to 30%), power output of the WTE plant and SCPP increases by 22% and 7%, respectively. Additionally, relative humidity of the surrounding air can increase the SCPP power production by 25%. In addition, the results indicate that wind speeds higher than 12.5 m/s will not affect power production of the SCPP, while relative humidity of the surrounding air, ambient temperature, the MSW feeding rate, and humidity of the MSW have considerable effects on the SCPP power production. In average, total energy and useful exergy efficiency of the proposed system is increased by 0.15% and 0.12% compared to the standalone WTE plant during nighttime. The integration of SCPP with the WTE plant is an applicable method to enhance the power generation and overcome the inconsistent power production of SCPP during nighttime.