CFD-Based Optimization of a Diesel Engine Waste Heat Recycle System

被引：1
作者：
Li, Da [1 ]
Zhang, Guodong [1 ]
Sun, Ke [1 ]
Bai, Shuzhan [1 ]
Li, Guoxiang [1 ]
机构：
[1] Shandong Univ, Sch Energy & Power Engn, Jinan 250061, Peoples R China
来源：
FDMP-FLUID DYNAMICS & MATERIALS PROCESSING | 2023年 / 19卷 / 06期
关键词：
Tube-fin heat exchanger; heat exchanging core; organic rankine cycle; working fluid; ORGANIC RANKINE-CYCLE; ORC SYSTEM; RECOVERY; EXCHANGER; DESIGN;
D O I：
10.32604/fdmp.2023.022634
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A dedicated heat exchanger model is introduced for the optimization of heavy-duty diesel engines. The model is a prerequisite for the execution of CFD simulations, which are used to improve waste heat recovery in these systems. Several optimization methods coupled with different types of working fluids are compared in terms of exergy efficiency and heat exchanger complicity. The three considered optimization methods all lead to significant improvements in the R245fa and R1233zd systems with a comparatively low evaporation temperature. The optimal R245fa system has the highest efficiency increase (77.49%). The cyclopentane system displays the highest efficiency among the optimized ORC (Organic Rankine Cycle) systems, yet achieved by using a much heavier evaporator HEC (Heat Exchanging Core). In contrast, the 96.84% efficiency increase for the optimized R1233zd is achieved with only 68.96% evaporator weight.
引用
收藏
页码：1479 / 1493
页数：15
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