A novel method for rotor profile optimization of high temperature screw expanders employed in waste heat recovery systems

2021 ◽  
Author(s):  
Zhaorui Zhao ◽  
Hao Yuan ◽  
Yafen Tian ◽  
Hua Zhang
Keyword(s):  
High Temperature ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Rotor Profile ◽  
Novel Method ◽  
Profile Optimization

scholarly journals Performance Comparison of Advanced Transcritical Power Cycles with High-Temperature Working Fluids for the Engine Waste Heat Recovery

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5886
Author(s):  
Xinxing Lin ◽  
Chonghui Chen ◽  
Aofang Yu ◽  
Likun Yin ◽  
Wen Su
Keyword(s):  
High Temperature ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Performance Comparison ◽  
Design System ◽  
Working Fluids ◽  
Power Cycles ◽  
System Parameters ◽  
Pressure Cycle

To efficiently recover the waste heat of mobile engine, two advanced transcritical power cycles, namely split cycle and dual pressure cycle, are employed, based on the recuperative cycle. Performances of the two cycles are analyzed and compared through the development of thermodynamic models. Under given gas conditions, seven high-temperature working fluids, namely propane, butane, isobutane, pentane, isopentane, neopentane, and cyclopentane, are selected for the two cycles. At the design system parameters, the highest work 48.71 kW, is obtained by the split cycle with butane. For most of fluids, the split cycle has a higher work than the dual pressure cycle. Furthermore, with the increase of turbine inlet pressure, net work of the split cycle goes up firstly and then decreases, while the work of dual pressure cycle increases slowly. For the split cycle, there exists a split ratio to get the maximum network. However, for the dual pressure cycle, the larger the evaporation temperature, the higher the net work. On this basis, system parameters are optimized by genetic algorithm to maximize net work. The results indicate that the highest work 49.96 kW of split cycle is obtained by pentane. For the considered fluids, except cyclopentane, split cycle always has a higher work than dual pressure cycle. Due to the higher net work and fewer system components, split cycle is recommended for the engine waste heat recovery.

Experimental study on heat pipe thermoelectric generator for industrial high temperature waste heat recovery

2020 ◽  
Vol 175 ◽  
pp. 115299 ◽  
Author(s):  
Chenglong Wang ◽  
Simiao Tang ◽  
Xiao Liu ◽  
G.H. Su ◽  
Wenxi Tian ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Heat Pipe ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Thermoelectric Generator ◽  
Waste Heat

scholarly journals Experimental exergy and energy analysis of a novel high-temperature heat pump with scroll compressor for waste heat recovery

2019 ◽  
Vol 253 ◽  
pp. 113504 ◽  
Author(s):  
Carlos Mateu-Royo ◽  
Joaquín Navarro-Esbrí ◽  
Adrián Mota-Babiloni ◽  
Francisco Molés ◽  
Marta Amat-Albuixech
Keyword(s):  
High Temperature ◽  
Heat Pump ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Energy Analysis ◽  
Waste Heat ◽  
Scroll Compressor ◽  
Temperature Heat ◽  
High Temperature Heat Pump
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