Alrbai Mohammad, Al-Dahidi Sameer, Al-Ghussain Loiy, Alahmer Ali, Hayajneh Hassan
Department of Mechanical Engineering, School of Engineering, University of Jordan, Amman 11942, Jordan.
Department of Mechanical and Maintenance Engineering, School of Applied Technical Sciences, German Jordanian University, Amman 11180, Jordan.
Sci Total Environ. 2024 May 20;926:172139. doi: 10.1016/j.scitotenv.2024.172139. Epub 2024 Apr 1.
Wastewater treatment plants (WWTPs) consume significant amount of energy to sustain their operation. From this point, the current study aims to enhance the capacity of these facilities to meet their energy needs by integrating renewable energy sources. The study focused on the investigation of two primary solar energy systems in As Samra WWTP in Jordan. The first system combines parabolic trough collectors (PTCs) with thermal energy storage (TES). This system primarily serves to fulfill the thermal energy demands of the plant by reducing the demands from boiler units, which allows more biogas for electricity generation. The second system is a photovoltaic (PV) system with Lithium-Ion batteries, which directly produces electricity that will be used to cover part of the electrical energy demands of plant. To assess the optimal configuration, two distinct scenarios have been formulated and compared to the current case scenario (SC#1). The first scenario focuses on maximizing the net present value (NPV) and minimizing the levelized cost of electricity (LCOE). The second scenario is centred on minimizing the levelized cost of heat (LCOH). The findings indicate that both scenarios succeeded in reducing the reliance on the grid to a value that reach 1 %. Moreover, they both reduced biogas percentage in energy production from 88 % to approximately 65 % through the integration of the PV system. In terms of thermal demand, SC#2 reduced the reliance on biogas boiler units from 100 % to 25 %, while SC#3 achieved an even more impressive reduction to just 8 %. The best LCOE value was attained in SC#2, at 0.0895 USD/kWh, with an NPV of 10.54 million USD. Conversely, SC# 3 yielded an LCOH value of 0.0432 USD/kWh compared to 0.0534 USD/kWh USD for SC#2. Despite their relatively high capital and operating costs, SC#2 and SC#3 managed to substantially decrease the annual electricity expenditure from approximately 2 million USD to 86,000 USD and 0 USD, respectively.
污水处理厂（WWTPs）为维持其运营消耗大量能源。从这一点来看，当前的研究旨在通过整合可再生能源来提高这些设施满足其能源需求的能力。该研究聚焦于对约旦阿斯萨姆拉污水处理厂的两种主要太阳能系统进行调查。第一个系统将抛物槽式集热器（PTCs）与热能储存（TES）相结合。该系统主要通过减少锅炉机组的需求来满足工厂的热能需求，从而使更多沼气用于发电。第二个系统是带有锂离子电池的光伏（PV）系统，其直接产生的电力将用于满足工厂部分电能需求。为评估最优配置，制定了两种不同的方案并与当前案例方案（SC#1）进行比较。第一个方案侧重于使净现值（NPV）最大化并使平准化度电成本（LCOE）最小化。第二个方案以最小化平准化度热成本（LCOH）为中心。研究结果表明，两种方案都成功地将对电网的依赖降低到了1%。此外，通过整合光伏系统，它们都将能源生产中沼气的占比从88%降低到了约65%。在热需求方面，SC#2将对沼气锅炉机组的依赖从100%降低到了25%，而SC#3实现了更显著的降低，仅为8%。SC#2实现了最佳的LCOE值，为0.0895美元/千瓦时，净现值为1054万美元。相反，SC#3的LCOH值为0.0432美元/千瓦时，而SC#2为0.0534美元/千瓦时。尽管SC#2和SC#3的资本和运营成本相对较高，但它们分别成功地将年度电力支出从约200万美元大幅降低到了8.6万美元和0美元。
