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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >A 0D model for diesel engine simulation and employing a transcritical dual loop Organic Rankine Cycle (ORC) for waste heat recovery from its exhaust and coolant: Thermodynamic and economic analysis
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A 0D model for diesel engine simulation and employing a transcritical dual loop Organic Rankine Cycle (ORC) for waste heat recovery from its exhaust and coolant: Thermodynamic and economic analysis

机译：柴油发动机模拟0D模型，采用跨临界双回路有机朗肯循环（ORC）从其排气和冷却液中的废热回收：热力学和经济分析

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摘要

A zero-dimensional simulation model is developed for a four-stroke turbocharged Diesel engine. In order to utilize the waste heat of exhaust and cooling water of the engine, a transcritical dual loop Organic Rankine Cycle (ORC) is employed. Temperature distributions and pinch point locations in heat exchangers are examined in detail, and performance parameters of the cycle are determined employing different working fluids, to achieve the best results. A comprehensive parametric study is also done to show the effects of engine speed and some other important parameters on the system performance. Thermodynamic properties of the engine exhaust gas and coolant are calculated using the developed simulation model for the engine which is validated with Diesel-RK software results. The simulation results show that the best performance is achieved using toluene and R143a as working fluids in high and low-temperature loops, respectively. In this case, net produced power of the transcritical dual loop ORC is determined to be 24.93 kW which is 25% of the engine brake power. The discounted payback period and specific investment cost are calculated to be 9.243 years and 4361 $/kW, respectively. The exergy analysis indicates that the highest exergy destruction rate in the cycle belongs to the condenser/evaporator.
机译：为四冲程涡轮增压柴油发动机开发了零维模拟模型。为了利用发动机的废气和冷却水的废热，采用跨临界双回路有机朗肯循环（ORC）。详细检查热交换器中的温度分布和夹点位置，并确定采用不同工作流体的循环的性能参数，以达到最佳效果。还进行了一个综合的参数研究来展示发动机速度和一些其他重要参数对系统性能的影响。使用柴油机软件结果验证的发动机的开发模拟模型计算发动机废气和冷却剂的热力学性质。仿真结果表明，使用甲苯和R143A作为高温环的工作流体实现了最佳性能。在这种情况下，跨临界双回路ORC的净产生功率确定为24.93千瓦，为发动机制动功率的25％。折扣投资回收期和特定投资成本分别计算为9.243岁和4361美元/千瓦。 Deertgy分析表明循环中最高的漏斗破坏率属于冷凝器/蒸发器。

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