Energy efficiency assessment by process heating assessment and survey tool (PHAST) and feasibility analysis of waste heat recovery in the reheat furnace at a steel company

The steel industry is one of the most energy intensive industries, contributing greenhouse gas (GHG) emissions. This research analyzes the feasibility of waste heat recovery and assesses energy efficiency at a steel company, Gerdau Ameristeel in Selkirk, Manitoba. The process heating assessment and...

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Bibliographic Details
Published inRenewable & sustainable energy reviews Vol. 15; no. 6; pp. 2904 - 2908
Main Authors Si, Minxing, Thompson, Shirley, Calder, Kurtis
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.08.2011
Elsevier
SeriesRenewable and Sustainable Energy Reviews
Subjects
Applied sciences
Assessments
Billets
Energy
energy conservation
Energy efficiency
Energy efficiency Energy recovery GHG PHAST Steel
Energy recovery
Exact sciences and technology
Furnaces
GHG
greenhouse gas emissions
greenhouse gases
heat transfer
Heating
industry
Iron and steel industry
PHAST
Preheating
Steel
Steel making
surveys
Manitoba
Canada, Manitoba
Energy recovery
Energy efficiency
PHAST
Steel
GHG
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Summary:The steel industry is one of the most energy intensive industries, contributing greenhouse gas (GHG) emissions. This research analyzes the feasibility of waste heat recovery and assesses energy efficiency at a steel company, Gerdau Ameristeel in Selkirk, Manitoba. The process heating assessment and survey tool (PHAST) determined that the overall efficiency in the reheat furnace is 60%. Flue gas losses are the biggest energy losses in the reheat furnace, accounting for 29.5% of the total energy losses during full production. Heat losses from wall, hearth and roof are also significant, being 7,139,170 kJ/h during full production. To reduce energy inefficiencies, it is recommended that billets be preheated to 315 °C in the reheat furnace. This requires 1.48 h to capture waste heat with a preheating section length of 1691.64 cm. The annual energy savings are estimated to be $215,086.12 requiring a 3.03 years payback period. This study was the first to determine the required size of a preheating box and the rate of heat transfer through billets in the preheating section.
Bibliography:http://dx.doi.org/10.1016/j.rser.2011.02.035
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1364-0321
1879-0690
DOI:10.1016/j.rser.2011.02.035