scholarly journals A Numerical Approach on Waste Heat Recovery through Sidewall Heat-Exchanging in an Aluminum Electrolysis Cell

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Youjian Yang ◽  
Wenju Tao ◽  
Zhaowen Wang ◽  
Zhongning Shi
Keyword(s):  
Heat Exchanger ◽  
Structural Design ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Aluminum Electrolysis ◽  
Numerical Approach ◽  
Electrolysis Cell ◽  
Matching Problems ◽  
Selection Principles ◽  
Fluctuating Wind

This paper proposes a technical viewpoint for the recovery of waste heat in aluminum electrolysis. The idea of combining heat-generating electrolysis process and the heat-consuming alumina tube digestion process is discussed in detail. The structural design of the heat-exchanging system as well as the matching problems between the heat exchanger and cell design are also mentioned. Several major concerns including the automatic temperature regulation of the cell sidewall and the preferred selection principles for the heat medium are introduced. A 2 kA heat exchangeable cell is developed and a series of tests are carried out in the laboratory. It is found that approximate 80% of the sidewall waste heat can be recovered while the cell behaves steadily. It is also proved possible to control the thickness of the frozen ledge through adjusting the heat convection rate of the heat exchanger. The heat-exchanging system is also suitable for aluminum cells when the fluctuating wind power is applied as a major energy supply.

EXPERIMENTAL INVESTIGATION OF HEAT PIPE HEAT EXCHANGER (HPHE) FOR WASTE HEAT RECOVERY APPLICATION

2019 ◽  
Author(s):  
Sakil Hossen ◽  
AKM M. Morshed ◽  
Amitav Tikadar ◽  
Azzam S. Salman ◽  
Titan C. Paul
Keyword(s):  
Experimental Investigation ◽  
Heat Exchanger ◽  
Heat Pipe ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Pipe Heat

Analysis of Heat Pipe Heat Exchanger (HPHE) For Waste Heat Recovery from an Air Conditioning System

2007 ◽  
Vol 2 (3) ◽  
pp. 86-95
Author(s):  
R. Sudhakaran ◽  
◽  
V. Sella Durai ◽  
T. Kannan ◽  
P.S. Sivasakthievel ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Pipe ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Air Conditioning System ◽  
Pipe Heat

ENERGY EFFICIENT PIPE HEAT EXCHANGER FOR WASTE HEAT RECOVERY FROM EXHAUST FLUE GASES

2017 ◽  
Vol 16 (5) ◽  
pp. 1107-1113 ◽  
Author(s):  
Andrei Burlacu ◽  
Constantin Doru Lazarescu ◽  
Adrian Alexandru Serbanoiu ◽  
Marinela Barbuta ◽  
Vasilica Ciocan ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Energy Efficient ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Flue Gases ◽  
Pipe Heat

Research on Waste Heat Recovery in Drain Water of Barbershop

2012 ◽  
Vol 204-208 ◽  
pp. 4229-4233 ◽  
Author(s):  
Fang Tian Sun ◽  
Na Wang ◽  
Yun Ze Fan ◽  
De Ying Li
Keyword(s):  
Heat Exchanger ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Utilization Efficiency ◽  
Drain Water ◽  
Waste Heat Recovery System ◽  
Heat Utilization ◽  
Recovery System ◽  
Heat Recovery System

Drain water at 35°C was directly discharged into sewer in most of barbershop with Electric water heater. Heat utilization efficiency is lower, and energy grade match between input and output is not appropriate in most of barbershops. Two waste heat recovery systems were presented according to the heat utilization characteristics of barbershops and principle of cascade utilization of energy. One was the waste heat recovery system by water-to-water heat exchanger (WHR-HE), and the other is the waste heat recovery system by water-to-water heat exchanger and high-temperature heat pump (WHR-CHEHP). The two heat recovery systems were analyzed by the first and second Laws of thermodynamic. The analyzed results show that the energy consumption can be reduced about 75% for HR-HE, and about 98% for WHR-CHEHP. Both WHR-HE and WHR-CHEHP are with better energy-saving effect and economic benefits.

scholarly journals Off-design operation of ORC engines with different heat exchanger architectures in waste heat recovery applications

2019 ◽  
Vol 158 ◽  
pp. 2348-2353 ◽  
Author(s):  
Maria Anna Chatzopoulou ◽  
Steven Lecompte ◽  
Michel De Paepe ◽  
Christos N. Markides
Keyword(s):  
Heat Exchanger ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat

scholarly journals Experimental and theoretical investigation of a flat heat pipe heat exchanger for waste heat recovery in the steel industry

Energy ◽  
2017 ◽  
Vol 141 ◽  
pp. 1928-1939 ◽  
Author(s):  
Hussam Jouhara ◽  
Sulaiman Almahmoud ◽  
Amisha Chauhan ◽  
Bertrand Delpech ◽  
Giuseppe Bianchi ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Pipe ◽  
Theoretical Investigation ◽  
Steel Industry ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Flat Heat Pipe ◽  
Pipe Heat

Heat and Mass Transfer Analysis of Mine Exhaust Air Heat Exchanger

2013 ◽  
Vol 765-767 ◽  
pp. 3018-3022
Author(s):  
Qiong Li ◽  
Yong Sheng Niu ◽  
Yi Xiang Sun ◽  
Zhe Liu
Keyword(s):  
Heat Exchanger ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Energy Resource ◽  
Thermal Calculation ◽  
Heat And Mass Exchange ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Good Energy

As a good energy resource, Mine exhaust air has an important value of recycling. In this paper, the heat and mass exchange mechanism and potential of the mine exhaust air heat exchanger (MEAHE) is mainly researched. The heat exchanger efficiency is affected by water and air temperature and flow in terms of double efficiency method. The result can provide the basis for the further determine the thermal calculation method for MEAHE, and lays the foundation for the mine comprehensive utilization of waste heat recovery system design.

The Potential Danger of Fire in Gas Turbine Heat Exchangers

1969 ◽  
Author(s):  
C. F. McDonald
Keyword(s):  
Heat Exchanger ◽  
Gas Turbine ◽  
Heat Exchangers ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Engine Operation ◽  
Exhaust Heat ◽  
The Subject ◽  
Gas Turbine Cycle

Increased emphasis is being placed on the regenerative gas turbine cycle, and the utilization of waste heat recovery systems, for improved thermal efficiency. For such systems there are modes of engine operation, where it is possible for a metal fire to occur in the exhaust heat exchanger. This paper is intended as an introduction to the subject, more from an engineering, than metallurgical standpoint, and includes a description of a series of simple tests to acquire an understanding of the problem for a particular application. Some engine operational procedures, and design features, aimed at minimizing the costly and dangerous occurrence of gas turbine heat exchanger fires, are briefly mentioned.

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