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On the ventilation ...
On the ventilation performance of low momentum confluent jets supply device in a classroom
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- Andersson, Harald, 1987- (författare)
- Högskolan i Gävle,Energisystem och byggnadsteknik,energisystem,Univ Gavle, Sweden
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- Kabanshi, Alan (författare)
- Högskolan i Gävle,Energisystem och byggnadsteknik,Univ Gavle, Sweden
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- Cehlin, Mathias, Doktor, 1974- (författare)
- Högskolan i Gävle,Energisystem och byggnadsteknik,Energisystem,Univ Gavle, Sweden
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- Moshfegh, Bahram, 1958- (författare)
- Högskolan i Gävle,Energisystem och byggnadsteknik,Linköpings universitet,Energisystem,Tekniska fakulteten,Univ Gavle, Sweden
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(creator_code:org_t)
- 2020-10-16
- 2020
- Engelska.
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Ingår i: Energies. - : MDPI. - 1996-1073. ; 13:20
- Relaterad länk:
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https://doi.org/10.3...
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https://hig.diva-por... (primary) (Raw object)
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https://www.mdpi.com...
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The performance of three different confluent jets ventilation (CJV) supply devices was evaluated in a classroom environment concerning thermal comfort, indoor air quality (IAQ) and energy efficiency. The CJV supply devices have the acronyms: high-momentum confluent jets (HMCJ), low-momentum confluent jets (LMCJ) and low-momentum confluent jets modified by varying airflow direction (LMCJ-M). A mixing ventilation (MV) slot jet (SJ) supply device was used as a benchmark. Comparisons were made with identical set-up conditions in five cases with different supply temperatures (TS) (16–18 °C), airflow rates (2.2–6.3 ACH) and heat loads (17–47 W/m2). Performances were evaluated based on DR (draft rating), PMV (predicted mean vote), ACE (air change effectiveness) and heat removal effectiveness (HRE). The results show that CJV had higher HRE and IAQ than MV and LMCJ/LMCJ-M had higher ACE than HMCJ. The main effects of lower Ts were higher velocities, DR (HMCJ particularly) and HRE in the occupied zone as well as lower temperatures and PMV-values. HMCJ and LMCJ produce MV conditions at lower airflow rates (<4.2 ACH) and non-uniform conditions at higher airflow rates. LMCJ-M had 7% higher HRE than the other CJV supply devices and produced non-uniform conditions at lower airflow rates (<3.3 ACH). The non-uniform conditions resulted in LMCJ-M having the highest energy efficiency of all devices.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Husbyggnad (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Building Technologies (hsv//eng)
Nyckelord
- experimental investigations
- confluent jets ventilation
- mixing ventilation
- ventilation efficiency
- thermal comfort
- heat removal effectiveness
- Hållbar stadsutveckling
- Sustainable Urban Development
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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