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Evaluating the potential of reducing peak heating load of a multi-family house using novel heat recovery system
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Fluid and Climate Technology.ORCID iD: 0000-0001-5902-2886
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Fluid and Climate Technology.ORCID iD: 0000-0001-6266-8485
2018 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 130, p. 1182-1190Article in journal (Refereed) Published
Abstract [en]

The current study evaluated the potential of reducing ventilation heat load by using heat from waste water in mechanical ventilation with heat recovery (MVHR) served Swedish residential buildings. A typical Swedish low-energy, multi-family house locating at the northern part of Sweden was selected to present the analysis. The building was locating at the northern part of Sweden and was served by mechanical ventilation with heat recovery (MVHR). The data from on-site measurements and analytical model were applied to evaluate the reduction potential of the suggested heat recovery system. The study focused on the evaluation of benefit of using an air preheater in front of the existing MVHR system. Two different sizes of an air preheater design: Small air preheater with the size of 0.4 m x 0.4 m x 0.4 m (AP(0.4mx0.4 mx0.4 m)), feed with waste water flow of 0.15 kg/s (from storage tank to air preheater); and a large air preheater with the size of 0.8 m x 0.8 m x 0.4 m (AP(0.8 mx0.8 mx0.4 m)), feed with waste water flow of 0.2 kg/s. It was found that the heat recovery efficiency of MVHR is the core to determine the selection of air preheaters. In comparison to the MVHR without air preheater, maximum air supply temperature improvements of 25% and 41% were found from AP(0.4mx0.4 mx0.4 m) and AP(0.8 mx0.8 mx0.4 m), respectively. The studied system reached its highest contributions when the heat recovery efficiency of MVHR was between 80% and 85%. On average, AP(0.4mx0.4 mx0.4 m) can reduced the peak heat load up to 27%. AP(0.8 mx0.8 mx0.4 m) can reduce the peak heat load up to 40% in the studied climate.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 130, p. 1182-1190
Keywords [en]
Residential waste water, Heat recovery, Balanced ventilation, Peak heat load, Low-energy multi-family houses
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-223511DOI: 10.1016/j.applthermaleng.2017.11.072ISI: 000424177600104Scopus ID: 2-s2.0-85034949075OAI: oai:DiVA.org:kth-223511DiVA, id: diva2:1184706
Funder
Swedish Energy Agency
Note

QC 20180222

Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-03-14Bibliographically approved

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Ploskic, AdnanWang, Qian

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