Performance evaluation and experiment system for waste heat recovery of diesel engine
Performance evaluation and experiment system for waste heat recovery of diesel engine
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DOI：
10.1016/j.energy.2013.03.073
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发表时间：
2013-06
期刊：
影响因子：
9
通讯作者：
Gao Wenzhi;Zhai Junmeng;L. Guanghua;Bian Qiang;F. Liming
中科院分区：
文献类型：
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作者：
Gao Wenzhi;Zhai Junmeng;L. Guanghua;Bian Qiang;F. Liming
本文提出了一种废热回收系统，其中高速涡轮增压柴油机作为联合循环的顶部，废气用于底部朗肯循环。本文建立了一种评价带有往复活塞膨胀器的朗肯循环系统性能的数学模型。本文重点研究了适用于内燃机余热回收的换热器和往复式活塞膨胀器的性能评价和参数选择。本文还介绍了实验设置和初步结果。仿真结果表明，在给定质量流量为0.015 ~ 0.021 kg/s时，根据增压柴油机（80 kW/2590 rpm）的余热回收率，进气压力应为4 ~ 5 MPa。计算了不同ICE转速下的净功率和净功率上升速率。结果表明，在柴油机转速为80 kW/2590 rpm时，引入热回收系统可使发动机输出功率提高12%。在低进气压力和低蒸汽流量条件下，通过P-V曲线上的两个负功循环，初步实验结果间接证明了仿真模型的正确性。
In this paper, a waste heat recovery system is proposed where a high speed turbocharged diesel engine acts as the topper of a combined cycle with exhaust gases used for a bottoming Rankine cycle. The paper describes a mathematical model to evaluate the performance of Rankine cycle system with a reciprocating piston expander. The paper focuses on the performance evaluation and parameter selection of the heat exchanger and reciprocating piston expander that are suitable to waste heat recovery of ICE (internal combustion engine). The paper also describes the experimental setup and the preliminary results. The simulation results show that a proper intake pressure should be 4–5 MPa at its given mass flow rate of 0.015–0.021 kg/s depending on the waste heat recovery of a turbocharged diesel engine (80 kW/2590 rpm). The net power and net power rise rate at various ICE rotation speeds are calculated. The result shows that introducing heat recovery system can increase the engine power output by 12%, when diesel engine operates at 80 kW/2590 rpm. The preliminary experimental results indirectly prove the simulation model by two negative work loops in the P–V curve, under a low intake pressure and steam flow rate condition.