A power dispatch model for a ferrochrome plant heat recovery cogeneration system

dc.contributor.authorZhang, Lijun
dc.contributor.authorChennells, Michael
dc.contributor.authorXia, Xiaohua
dc.contributor.emaillijun.zhang@up.ac.zaen_ZA
dc.date.accessioned2017-12-01T06:13:45Z
dc.date.issued2018-10
dc.description.abstractA Organic Rankine Cycle waste heat recovery cogeneration system for heat recovery and power generation to relieve grid pressure and save energy cost for a ferrochrome smelting plant is investigated. Through the recovery and utilization of previously wasted heat from the facility’s internal smelting process off-gases, the cogeneration system is introduced to generate electrical power to supply the on-site electricity demand and feed electricity back to the utility grid when it is necessary and beneficial to do so. In addition, the cogeneration system generates cooling power through a lithium bromide-water solution absorption refrigeration cycle to meet the cooling requirements of the plant. The heat recovery process for power generation is modeled and the optimal power dispatching between the on-site loads and the utility grid is formulated as an economic power dispatching (EPD) problem, which aims to maximize the plant’s economic benefits by means of minimizing the cost of purchasing electricity from the utility and maximizing revenue from selling the generated electricity to the grid. Application of the developed model to a ferrochrome smelting plant in South Africa is presented as a case study. It is found that, for the studied case, more than $1,290,000 annual savings can be obtained as a result of the proposed heat recovery power generation system and the associated EPD model. In addition to this, more than $920,000 annual savings is obtained as a result of the generated cooling power via the proposed absorption refrigeration system. The combined cogeneration system is able to generate up to 4.4 MW electrical power and 11.3 MW cooling power from the recovered thermal energy that was previously wasted.en_ZA
dc.description.departmentElectrical, Electronic and Computer Engineeringen_ZA
dc.description.embargo2019-10-01
dc.description.librarianhj2017en_ZA
dc.description.urihttp://www.elsevier.com/locate/apenergyen_ZA
dc.identifier.citationZhang, L., Chennells, M. & Xia, X. A power dispatch model for a ferrochrome plant heat recovery cogeneration system. Applied Energy (2018) vol. 227, pp. 180-189, http://dx.doi.org/10.1016/j.apenergy.2017.08.019.en_ZA
dc.identifier.issn0306-2619 (print)
dc.identifier.issn1872-9118 (online)
dc.identifier.other10.1016/j.apenergy.2017.08.019
dc.identifier.urihttp://hdl.handle.net/2263/63409
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2017 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Applied Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Applied Energy, vol. 227, pp. 180-189, 2018, doi : 10.1016/j.apenergy.2017.08.019.en_ZA
dc.subjectOptimal power flowen_ZA
dc.subjectEconomic power dispatching (EPD)en_ZA
dc.subjectOrganic Rankine cycle (ORC)en_ZA
dc.subjectWaste heat recoveryen_ZA
dc.subjectUtilizationen_ZA
dc.subjectRecoveryen_ZA
dc.subjectPower generation systemsen_ZA
dc.subjectPower dispatchingen_ZA
dc.subjectLithium-bromide wateren_ZA
dc.subjectCombined cogenerationen_ZA
dc.subjectAbsorption refrigeration systemen_ZA
dc.subjectWater absorptionen_ZA
dc.subjectWaste heat utilizationen_ZA
dc.subjectWaste heaten_ZA
dc.subjectRefrigerationen_ZA
dc.subjectRankine cycleen_ZA
dc.subjectMeteorologyen_ZA
dc.subjectElectric power transmission networksen_ZA
dc.subjectElectric power system economicsen_ZA
dc.subjectElectric load flowen_ZA
dc.subjectEconomicsen_ZA
dc.subjectCoolingen_ZA
dc.subjectCogeneration plantsen_ZA
dc.subjectAbsorption coolingen_ZA
dc.titleA power dispatch model for a ferrochrome plant heat recovery cogeneration systemen_ZA
dc.typePostprint Articleen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Zhang_Power_2018.pdf
Size:
606.93 KB
Format:
Adobe Portable Document Format
Description:
Postprint Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description: