Indoor Thermal Environment Generated by Convective and Radiant Systems

Panu Mustakallio

Indoor Thermal Environment Generated by Convective and Radiant Systems

Julkaisun otsikon käännös: Konvektiivisten ja säteilevien järjestelmien luomat lämpöolosuhteet sisäympäristössä

Panu Mustakallio

Konetekniikan laitos

Tutkimustuotos: Doctoral Thesis › Collection of Articles

Abstrakti

Uudenaikaisten toimistorakennusten sisäilmastojärjestelmien tulisi mahdollistaa viihtyisä ja tuottava sisäympäristö tilan käyttäjille. Tässä väitöskirjassa on tutkittu konvektioon, säteilyyn ja niiden yhdistelmään perustuvien sisäilmastojärjestelmien toimintaa liittyen tilojen lämpöolosuhteisiin. Tutkittuja järjestelmiä ovat olleet ilmastointipalkki- ja jäähdytyskatto sekoitusilmanvaihdolla sekä ilmastointipalkkiin integroitu säteilypaneeli ja uusi, kokeellinen säteilyjäähdytyslaite. Lämpöolosuhteita on tutkittu edistyksellisin mittausmenetelmin mukaan lukien mittaukset lämpönukella simuloiduissa toimistotiloissa eri lämpökuormatasoilla ja tilaratkaisuilla. Yksi merkittävä havainto tässä tutkimuksessa oli pienet erot lämpöolosuhteissa eri jäähdytysjärjestelmiä käytettäessä. Toinen merkittävä havainto oli jäähdytyskaton ja sekoitusilmanvaihdon luomat tasaisimmat lämpöolosuhteet eri toimiston työpistejärjestelyillä. Tämä tehtiin osana kattavaa analyysiä eri jäähdytysjärjestelmien toiminnan vaikutuksesta sisäolosuhteisiin. Ilmanjaon ja lämpökuormajärjestelyn vaikutusta kattoon asennettavien säteilypaneelien jäähdytystehoon tutkittiin väitöskirjan toisessa osassa. Jäähdytystehon lisäys eri ilmanjakotavoilla ja lämpökuormajärjestelyillä selvitettiin. Lämpöolosuhteita ja ilmastointipalkkiin integroidun säteilypaneelin toimintaa lämmitystilanteissa tutkittiin kokeellisilla ja CFD-simuloinnin menetelmillä. Lämpöolosuhteet olivat kaikissa tutkituissa tapauksissa hyvät lämpöviihtyvyyden kannalta. Tutkimuksessa määritettiin alhaisin ikkunan sisäpinnan lämpötila mitoitusolosuhteissa, jolla järjestelmä toimii parhaiten. Tämä voidaan saavuttaa helposti uudenaikaisella ikkunarakenteella.

Julkaisun otsikon käännös	Konvektiivisten ja säteilevien järjestelmien luomat lämpöolosuhteet sisäympäristössä
Alkuperäiskieli	Englanti
Pätevyys	Tohtorintutkinto
Myöntävä instituutio	Aalto-yliopisto
Valvoja/neuvonantaja	Sirén, Kai, Vastuuprofessori Kosonen, Risto, Ohjaaja Melikov, Arsen K., Ohjaaja
Kustantaja	Aalto University
Painoksen ISBN	978-952-60-7763-5
Sähköinen ISBN	978-952-60-7764-2
Tila	Julkaistu - 2017
OKM-julkaisutyyppi	G5 Tohtorinväitöskirja (artikkeli)

Tutkimusalat

Ilmastointipalkki
Jäähdytyskatto
Säteilyjäähdytys
Säteilylämmitys
Konvektiojäähdytys
Sekoitusilmanvaihto
Lämpöolosuhteet
Lämpöviihtyvyys

Pääsy asiakirjaan

http://urn.fi/URN:ISBN:978-952-60-7764-2Lisenssi: Määrittelemätön

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title = "Indoor Thermal Environment Generated by Convective and Radiant Systems",

abstract = "The design of indoor climate systems in modern office buildings should enable comfortable and productive indoor environment for occupants. The objective of the thesis has been to investigate the performance of convective, radiant and combined indoor climate systems with regard to thermal environment. Studied systems included chilled beam and chilled ceiling with mixing ventilation, chilled beam integrated with radiant panel and also research of a novel experimental radiant cooling unit. Thermal environment was assessed by measurements using advanced instruments including thermal manikins in simulated office spaces with different heat load levels and room layouts. One significant finding in this research was the small difference in thermal environment between different cooling systems.Other significant finding was the performance of chilled ceiling with mixing ventilation providing the most uniform thermal environment regardless of the workstation layout as part of comprehensive analysis of the characteristics of different cooling systems generating thermal environment. The effects of air distribution and heat load arrangement on the cooling performance of the ceiling radiant panels were studied in the other part of the thesis. The increase of the cooling power with different supply air distribution and heat load types were revealed. The thermal environment and the performance of chilled beam integrated with radiant panel in heating mode was studied with both experimental and CFD simulation methods. Thermal comfort conditions in all studied cases were good, still minimum internal window surface temperature in design conditions was found for the most advantageous conditions. That can be easily achieved with modern window construction.",

keywords = "chilled beam, chilled ceiling, radiant cooling, radiant heating, convective cooling, mixing ventilation, thermal environment, thermal comfort, Ilmastointipalkki, J{\"a}{\"a}hdytyskatto, S{\"a}teilyj{\"a}{\"a}hdytys, S{\"a}teilyl{\"a}mmitys, Konvektioj{\"a}{\"a}hdytys, Sekoitusilmanvaihto, L{\"a}mp{\"o}olosuhteet, L{\"a}mp{\"o}viihtyvyys, chilled beam, chilled ceiling, radiant cooling, radiant heating, convective cooling, mixing ventilation, thermal environment, thermal comfort",

author = "Panu Mustakallio",

year = "2017",

language = "English",

isbn = "978-952-60-7763-5",

series = "Aalto University publication series DOCTORAL DISSERTATIONS",

publisher = "Aalto University",

number = "245",

address = "Finland",

school = "Aalto University",

}

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T1 - Indoor Thermal Environment Generated by Convective and Radiant Systems

AU - Mustakallio, Panu

PY - 2017

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N2 - The design of indoor climate systems in modern office buildings should enable comfortable and productive indoor environment for occupants. The objective of the thesis has been to investigate the performance of convective, radiant and combined indoor climate systems with regard to thermal environment. Studied systems included chilled beam and chilled ceiling with mixing ventilation, chilled beam integrated with radiant panel and also research of a novel experimental radiant cooling unit. Thermal environment was assessed by measurements using advanced instruments including thermal manikins in simulated office spaces with different heat load levels and room layouts. One significant finding in this research was the small difference in thermal environment between different cooling systems.Other significant finding was the performance of chilled ceiling with mixing ventilation providing the most uniform thermal environment regardless of the workstation layout as part of comprehensive analysis of the characteristics of different cooling systems generating thermal environment. The effects of air distribution and heat load arrangement on the cooling performance of the ceiling radiant panels were studied in the other part of the thesis. The increase of the cooling power with different supply air distribution and heat load types were revealed. The thermal environment and the performance of chilled beam integrated with radiant panel in heating mode was studied with both experimental and CFD simulation methods. Thermal comfort conditions in all studied cases were good, still minimum internal window surface temperature in design conditions was found for the most advantageous conditions. That can be easily achieved with modern window construction.

AB - The design of indoor climate systems in modern office buildings should enable comfortable and productive indoor environment for occupants. The objective of the thesis has been to investigate the performance of convective, radiant and combined indoor climate systems with regard to thermal environment. Studied systems included chilled beam and chilled ceiling with mixing ventilation, chilled beam integrated with radiant panel and also research of a novel experimental radiant cooling unit. Thermal environment was assessed by measurements using advanced instruments including thermal manikins in simulated office spaces with different heat load levels and room layouts. One significant finding in this research was the small difference in thermal environment between different cooling systems.Other significant finding was the performance of chilled ceiling with mixing ventilation providing the most uniform thermal environment regardless of the workstation layout as part of comprehensive analysis of the characteristics of different cooling systems generating thermal environment. The effects of air distribution and heat load arrangement on the cooling performance of the ceiling radiant panels were studied in the other part of the thesis. The increase of the cooling power with different supply air distribution and heat load types were revealed. The thermal environment and the performance of chilled beam integrated with radiant panel in heating mode was studied with both experimental and CFD simulation methods. Thermal comfort conditions in all studied cases were good, still minimum internal window surface temperature in design conditions was found for the most advantageous conditions. That can be easily achieved with modern window construction.

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KW - chilled ceiling

KW - radiant cooling

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KW - convective cooling

KW - mixing ventilation

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KW - thermal comfort

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SN - 978-952-60-7763-5

T3 - Aalto University publication series DOCTORAL DISSERTATIONS

PB - Aalto University

ER -

Indoor Thermal Environment Generated by Convective and Radiant Systems

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