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Energy-efficient Legionella control that mimics nature and an open-sourcecomputational model to aid system design
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-7144-9778
Number of Authors: 22017 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 127, p. 370-377Article in journal (Refereed) Published
Abstract [en]

The Duck Foot Heat Exchange Model (DFHXM) was developed to aid design of energy efficient thermal pasteurization systems for water but applies to all fluids. Here, the freely available Microsoft Excel model and potential applications are described. The principle imitates countercurrent heat exchange in the feet of ducks which reduces environmental heat losses in cold climates. The designed system pasteurizes the chosen fluid by maintaining a required disinfection temperature for a given time. A heat exchanger preheats incoming fluid before reaching a heating reservoir (electric, solar, gas, etc.). Upon exiting the heater, fluid reenters the same heat exchanger to cool down, simultaneously preheating new incoming fluid. Thus, the design only requires a heater to add the necessary heat not gained in the heat exchanger and to cover environmental heat losses. The DFHXM allows users to input parameters to simulate their specific duck foot (DF) systems and obtain transient and steady-state fluid temperatures within the heat exchanger and heating reservoir. The model has the flexibility to simulate a wide variety of designs, and potential applications to Legionella control and solar-thermal water disinfection are discussed. Reported simulations agreed well with experimental results for transient and steady-state temperatures, the largest discrepancy in steady-state temperatures being 4.6 %.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 127, p. 370-377
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-7772DOI: 10.1016/j.applthermaleng.2017.08.006ISI: 000413608400036Scopus ID: 2-s2.0-85027507018Local ID: 63139f49-d53b-483d-bf97-5ca92b7637b1OAI: oai:DiVA.org:ltu-7772DiVA, id: diva2:980662
Conference
Asian Symposium on Computational Heat Transfer and Fluid Flow (ASCHT), Busean, South Africa, Nov 22-25 2015
Note

Konferensartikel i tidskrift

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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