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Power and Energy Engineering Conference (PEEC 2010 E-BOOK)

Wuhan,China,9.11-9.13，2010

ISBN: 978-1-935068-17-4 Scientific Research Publishing, USA

E-Book 846pp Pub. Date: October 2010

Category: Engineering

Price: $80

Title: Performance Analysis on Low-Temperature Waste Heat Power Generation System of Aluminum Reduction Cell
Source: Power and Energy Engineering Conference (PEEC 2010 E-BOOK) (pp 345-349)
Author(s): Zhiqi Wang, Institute of Mechanical Engineering, Xiang Tan University, Xiangtan, Hunan 411105 China
Naijun Zhou, Institute of Mechanical Engineering, Xiang Tan University, Xiangtan, Hunan 411105 China School of Energy Science and Engineering, Central South University, Changsha, Hunan 410083 China
Xiaoxia Xia, Institute of Mechanical Engineering, Xiang Tan University, Xiangtan, Hunan 411105 China
Abstract: The performance of an organic Rankine cycle (ORC) system to recover low-temperature waste heat from aluminum reduction cell is presented. The mass flow rate of waste heat is 69.5kg/s and minimum temperature difference between waste heat and working fluids is 10 . The results ℃ show that for the same pinch point, there is an optimal evaporating temperature for maximum net power. Among the several researched working fluids, R227ea gives highest net power for heat source temperature range of 100℃-140℃ and R236fa produces the highest power in the range of 150-170℃. When the temperature is greater than 180℃, R236ea generates the maximum net power. The maximum net power for the waste heat increases from 306kW to 1425kW as heat source temperature increases from 100℃ to 200℃. It can reduce the consumed energy for production of one ton aluminum from 0.7 to 3.3 percent.
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