Experimental investigation on a flat heat pipe heat exchanger for waste heat recovery in steel industry

Jouhara, Hussam; Almahmoud, Sulaiman; Chauhan, Amisha; Delpech, Bertrand; Nannou, Theodora; Tassou, S.A.; Llera, Rocio; Lago, Francisco; Arribas, Juan José Martín

doi:10.1016/j.egypro.2017.07.262

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…Particularly, the waste heat of iron and steel making processes present a great opportunity for energy use. On the one hand, it is the largest energy consuming industrial process [3]; it can be reach 4-5% of the total world energy consumption [4]. On the other hand, the exhaust gas temperature can reach 1450-1500°C [5].…”

Section: Introductionmentioning

confidence: 99%

“…Their results showed an efficiency around 92% and they suggested the optimum length for the recuperator to employ in a Rankine cycle. Furthermore, [3] designed a flat heat pipe heat exchanger to recover the heat by radiation and convection from steel industry. They carried out experimental tests showing that the proposed technology could be a promising technology to recover the waste heat in applications with hot source temperatures higher than 450°C.…”

Section: Introductionmentioning

confidence: 99%

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Design of a radiative heat recuperator for steel processes

et al. 2020

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In recent years, there has been an increasing interest in the recovery of the waste heat of steel and glass processes. This work proposes a numerical study of a waste heat exchanger system for steel production processes. The radiative energy is transferred to a commercial oil, which can be used to produce electricity. The behavior of the recuperator is analysed using a 3D numerical model, considering the constrains of a real production plant. The influence of the radiation properties of the materials on the temperature and heat transfer rate are also examined. The results show that the absorptivity of the tubes influences significantly the absorbed waste heat. Furthermore, heterogeneous mass flow distribution should be applied to optimize the total heat transfer rate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a radiative heat recuperator for steel processes

et al. 2020

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“…Heat pipe heat exchangers can also be used to recover the heat from the flawed air evacuated from buildings and to heat water in a cross-flow circuit [9] or to preheat fresh air used in the heating, ventilation and air conditioning system [10][11][12] or waste heat recovery [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of a dual heat recovery system

et al. 2019

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This paper presents a CFD Heat Transfer Analysis of an originally designed system for heat recovery in the building sector. The heat exchanger has a dual role, which means it will produce simultaneously hot water and warm air. The key to the efficiency of the heat exchanger is the heat pipe system which recovers thermal energy from residual hot water and transfers it to the secondary agents. The paper includes a case study structured by different mesh distributions and flow regimes. The purpose of the heat exchanger is to reduce the costs of producing thermal energy and to increase the overall energy efficiency of buildings.

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“…Most of the Brazilian mini-mills do not recover heat from dedusting systems, so that there is significant potential to increase the energy efficiency of the overall minimill process. Recent publications present studies of heat recovery opportunities in steel mills, most of them referring to integrated steel mills [3][4][5][6][7]. Heat recovery for power generation in mini-mills is found in the works of Pili et al [8], Ramirez et al [9] and Nardin et al [10].…”

Section: Introductionmentioning

confidence: 99%

Heat recovery of dedusting systems in electric arc furnaces: concept of a bottoming cogeneration plant and techno-economic analysis

Silva

Matelli

2017

J Braz. Soc. Mech. Sci. Eng.

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Steelworks require large amount of energy in reduction, fusion and refining processes. A mini-mill is a steelwork that produces steel by melting scrap metal, pig iron and metallic elements in electric arc furnaces. Depending on the desired product, the refining process requires vacuum degassing to remove contaminant gases from the liquid steel. The vacuum in the degassing process can be obtained through steam ejectors, which use superheated steam. Furthermore, environmental legislation requires mini-mills to have dedusting systems over the electric furnaces. In general, a dedusting system generates high flow rates of hot off-gases, which indicates an interesting potential for heat recovering. In this paper, a cogeneration plant to recover heat from the dedusting system of a Brazilian mini-mill is proposed. The actual operation data are considered to calculate the heat available and to conceptualize a bottoming cogeneration plant that generates electric power and superheated steam for the ejectors of the degassing process. Results show that the proposed plant can generate 45.4% of the steam required by the ejectors and up to 2.4% of the power required by the electric arc furnace. Also, the heat recovering from the dedusting system reduces the use of cooling water by 29.3%. From an economic viewpoint, the cogeneration plant decreased the expenses for power, steam and cooling water by 1.5, 32 and 29%, respectively. Overall, there was an expense reduction of 4.8%, resulting in a payback period of 4.1 years in the case base. For a projected best case scenario, the payback period is about 2.3 years.

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Experimental investigation on a flat heat pipe heat exchanger for waste heat recovery in steel industry

Cited by 20 publications

References 6 publications

Design of a radiative heat recuperator for steel processes

Design of a radiative heat recuperator for steel processes

CFD analysis of a dual heat recovery system

Heat recovery of dedusting systems in electric arc furnaces: concept of a bottoming cogeneration plant and techno-economic analysis

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