在离网地区将有机秩循环-ORC 与柴油发电机相结合的综合方法:哥伦比亚案例研究

IF 5.3 Q2 ENGINEERING, ENVIRONMENTAL
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引用次数: 0

摘要

柴油发电机组在非电网地区发电时的高效燃料管理是一个长期关注的问题。在这种情况下,使用有机郎肯循环 (ORC) 从柴油发电机组的废气中回收热量是一条很有前景的额外发电途径。要开展此类项目,就必须了解与柴油发动机有关的关键参数,包括特定燃料消耗量、质量流量和废气温度。这些参数是确定 ORC 热回收系统规模的基础。本研究根据离网社区的负载需求,介绍了一种评估柴油机 ORC 系统运行的创新方法。建议的系统是一种可行的额外发电解决方案,目的是提高整体效率,满足偏远地区更高的能源需求。ORC 选择了四种有机流体:R245fa、苯、环戊烷和甲苯。这一选择基于许多标准,包括全球升温潜能值(GWP)、臭氧消耗潜能值(ODP)和安全分类(ASHRAE 34)。此外,还对这些流体的放能行为进行了审查。随后,对哥伦比亚的一个非互联地区进行了比较分析,以评估柴油发电机独立运行和与柴油 ORC 系统联合运行的性能。采用的主要指标包括节省的燃料消耗(升/年)、产生的能量(兆瓦时/年)、平准化能源成本(LCOE,美元/千瓦时)和投资回收期(年)。结果表明,在 1 年的模拟期内,苯 ORC 系统的总体能效最高,达到 41.38%。放能分析表明,甲苯的不可逆性较低,放能效率为 44.78%,其次是苯(43.5%)。此外,使用苯的柴油-ORC 系统的具体燃料消耗量从 0.282 升/千瓦时明显降低到 0.247 升/千瓦时,这意味着每年的二氧化碳排放量减少了 10.52%。发电成本降低了 4.3%,投资回收期不超过 14 年。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comprehensive methodology for the integrating of the organic rankine Cycle-ORC with diesel generators in off-grid areas: Application to a Colombian case study
Efficient fuel management in diesel generator sets for power generation in non-grid areas is a persistent concern. In this context, the use of an Organic Rankine Cycle (ORC) to recover heat from exhaust gases from diesel generator sets represents a promising route for additional power generation. To undertake such projects, it is necessary to understand the critical parameters related to diesel engines, including the specific fuel consumption, mass flow, and exhaust gas temperature. These parameters are fundamental to the sizing process of the ORC heat recovery system. This study introduces an innovative methodology for evaluating the operation of diesel-ORC systems based on the load demand of off-grid communities. The proposed system is a viable solution for the generation of additional power with the objective of improving the overall efficiency and meeting higher energy demands in isolated areas. Four organic fluids were selected for the ORC: R245fa, benzene, cyclopentane, and toluene. This selection was made based on many criteria, including global warming potential (GWP), ozone depletion potential (ODP), and safety classification (ASHRAE 34). In addition, the exergy behaviors of these fluids were reviewed. A comparative analysis was subsequently conducted for a non-interconnected region of Colombia to evaluate the performance of a diesel generator operating independently and in conjunction with the diesel ORC system. The key indicators employed were fuel consumption savings (L/year), energy produced (MWh/year), levelized cost of energy (LCOE, USD/kWh), and payback period (years). The results demonstrated that, over the course of a 1-year simulation period, the benzene ORC system exhibited the highest overall energy efficiency, achieving a value of 41.38%. The exergy analysis indicated that toluene had lower irreversibilities, achieving an exergy efficiency of 44.78%, followed by benzene (43.5%. Furthermore, the diesel-ORC system using benzene demonstrated a notable decrease in the specific fuel consumption from 0.282 to 0.247 L/kWh, signifying a 10.52% reduction in the annual CO2eq emissions. The cost of electricity generation decreased by 4.3%, with investment payback periods not exceeding 14 years.
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来源期刊
Cleaner Engineering and Technology
Cleaner Engineering and Technology Engineering-Engineering (miscellaneous)
CiteScore
9.80
自引率
0.00%
发文量
218
审稿时长
21 weeks
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