Resumé

Diffuse ceiling ventilation system is an air distribution system in which part of the suspended ceiling made of perforated panels is used as an air diffuser for the supply of fresh air. This method has been proven to have a higher cooling capacity compared to conventional air distribution systems. The cooling capacity of the system, however, depends on several parameters. This paper presents evaluation results regarding the cooling capacity of the diffuse ceiling ventilation system in connection to two essential parameters, i.e. the distribution of heat sources in the room and the ratio of perforated to non-perforated panels in the ceiling. The evaluation is based on full-scale experiments performed in a laboratory controlled environment and using a design chart which expresses the limits on the supply airflow rate and temperature. The experimental results indicate that the highest cooling capacity is achieved when the heat sources are distributed evenly and the perforated panels cover the entire ceiling. In the case of partial coverage, the cooling capacity is reduced when the heat sources are placed below the perforated panels. The system can have a higher cooling capacity in the partial coverage configuration compared to the full coverage one depending on the supply airflow rate.
OriginalsprogEngelsk
TitelCLIMA 2019 conference
Publikationsdato2019
DOI
StatusUdgivet - 2019
BegivenhedCLIMA 2019: REHVA 13th HVAC World Congress - Bucharest, Rumænien
Varighed: 26 maj 201929 maj 2019
Konferencens nummer: 13

Konference

KonferenceCLIMA 2019
Nummer13
LandRumænien
ByBucharest
Periode26/05/201929/05/2019

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Ceilings
Ventilation
Cooling
Air
Diffusers (fluid)
Hot Temperature
Experiments

Citer dette

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title = "Evaluating the cooling capacity of diffuse ceiling ventilation system – Full-scale experimental study",
abstract = "Diffuse ceiling ventilation system is an air distribution system in which part of the suspended ceiling made of perforated panels is used as an air diffuser for the supply of fresh air. This method has been proven to have a higher cooling capacity compared to conventional air distribution systems. The cooling capacity of the system, however, depends on several parameters. This paper presents evaluation results regarding the cooling capacity of the diffuse ceiling ventilation system in connection to two essential parameters, i.e. the distribution of heat sources in the room and the ratio of perforated to non-perforated panels in the ceiling. The evaluation is based on full-scale experiments performed in a laboratory controlled environment and using a design chart which expresses the limits on the supply airflow rate and temperature. The experimental results indicate that the highest cooling capacity is achieved when the heat sources are distributed evenly and the perforated panels cover the entire ceiling. In the case of partial coverage, the cooling capacity is reduced when the heat sources are placed below the perforated panels. The system can have a higher cooling capacity in the partial coverage configuration compared to the full coverage one depending on the supply airflow rate.",
keywords = "Diffuse Ceiling Ventilation",
author = "Samira Rahnama and Nielsen, {Peter Vilhelm} and Alireza Afshari and Bergs{\o}e, {Niels Christian} and Hicham Johra and Jensen, {Rasmus Lund}",
year = "2019",
doi = "https://doi.org/10.1051/e3sconf/201911102006",
language = "English",
booktitle = "CLIMA 2019 conference",

}

Evaluating the cooling capacity of diffuse ceiling ventilation system – Full-scale experimental study. / Rahnama, Samira; Nielsen, Peter Vilhelm; Afshari, Alireza; Bergsøe, Niels Christian; Johra, Hicham; Jensen, Rasmus Lund.

CLIMA 2019 conference. 2019.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - Evaluating the cooling capacity of diffuse ceiling ventilation system – Full-scale experimental study

AU - Rahnama, Samira

AU - Nielsen, Peter Vilhelm

AU - Afshari, Alireza

AU - Bergsøe, Niels Christian

AU - Johra, Hicham

AU - Jensen, Rasmus Lund

PY - 2019

Y1 - 2019

N2 - Diffuse ceiling ventilation system is an air distribution system in which part of the suspended ceiling made of perforated panels is used as an air diffuser for the supply of fresh air. This method has been proven to have a higher cooling capacity compared to conventional air distribution systems. The cooling capacity of the system, however, depends on several parameters. This paper presents evaluation results regarding the cooling capacity of the diffuse ceiling ventilation system in connection to two essential parameters, i.e. the distribution of heat sources in the room and the ratio of perforated to non-perforated panels in the ceiling. The evaluation is based on full-scale experiments performed in a laboratory controlled environment and using a design chart which expresses the limits on the supply airflow rate and temperature. The experimental results indicate that the highest cooling capacity is achieved when the heat sources are distributed evenly and the perforated panels cover the entire ceiling. In the case of partial coverage, the cooling capacity is reduced when the heat sources are placed below the perforated panels. The system can have a higher cooling capacity in the partial coverage configuration compared to the full coverage one depending on the supply airflow rate.

AB - Diffuse ceiling ventilation system is an air distribution system in which part of the suspended ceiling made of perforated panels is used as an air diffuser for the supply of fresh air. This method has been proven to have a higher cooling capacity compared to conventional air distribution systems. The cooling capacity of the system, however, depends on several parameters. This paper presents evaluation results regarding the cooling capacity of the diffuse ceiling ventilation system in connection to two essential parameters, i.e. the distribution of heat sources in the room and the ratio of perforated to non-perforated panels in the ceiling. The evaluation is based on full-scale experiments performed in a laboratory controlled environment and using a design chart which expresses the limits on the supply airflow rate and temperature. The experimental results indicate that the highest cooling capacity is achieved when the heat sources are distributed evenly and the perforated panels cover the entire ceiling. In the case of partial coverage, the cooling capacity is reduced when the heat sources are placed below the perforated panels. The system can have a higher cooling capacity in the partial coverage configuration compared to the full coverage one depending on the supply airflow rate.

KW - Diffuse Ceiling Ventilation

U2 - https://doi.org/10.1051/e3sconf/201911102006

DO - https://doi.org/10.1051/e3sconf/201911102006

M3 - Article in proceeding

BT - CLIMA 2019 conference

ER -