Thermal comfort and indoor air quality in the lecture room with 4-way cassette air-conditioner and mixing ventilation system

Noh, Kwang-Chul; Jang, Jae-Soo; Oh, Minah

doi:10.1016/j.buildenv.2005.10.033

Cited by 68 publications

(21 citation statements)

References 8 publications

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“…Exercise can affect human thermal sensation due to an increased metabolic rate (Ashley et al 2008). The selection and the structure of the questionnaire was in line with published research in the field (Cheong et al 2003;Ealiwa et al 2001;Fountain et al 1996;Noh et al 2007;Sharples and Malama 1997;Zhang and Zhao 2008). The English version of the questionnaire can be found in Appendix 1.…”

Section: Field Survey and Measuring Toolsmentioning

confidence: 75%

Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

Ghаni

Bialy

Bakochristou

et al. 2017

Science and Technology for the Built Environment

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Thermal comfort in hot and arid outdoor environments is an industrial challenging field. An outdoor air-conditioned area was designed and built to host sport and social events during summers 2014 and 2015 in Qatar. This article presents a thermal comfort analysis of the outdoor air-conditioned area using computational fluid dynamics, on-site spectators surveys, and on-spot climatic measurements. The study utilized computational fluid dynamics to develop a thermal comfort model of the outdoor air-conditioned area to predict the thermal comfort of the occupants. Five different thermal comfort indices; mean comfort vote, cooling power index, wet-bulb globe temperature index, Humidex, discomfort index, were utilized to assess the thermal comfort of spectators within the conditioned space. The indices utilized different on site measurements of meteorological data and on-site interviews. In comparison to the mean comfort vote of the sampled survey, all thermal comfort indices underestimated the actual thermal comfort percentage except the wet-bulb globe temperature index that overestimated the comfort percentage. The computational fluid dynamics results reasonably predicted most of the thermal comfort indices values. The computational fluid dynamics results overestimated the comfort percentage of mean comfort vote, wet-bulb globe temperature index, and discomfort index, while the thermal comfort percentage was underestimated as indicated by the cooling power index, and Humidex.

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Section: Field Survey and Measuring Toolsmentioning

confidence: 75%

Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

Ghаni

Bialy

Bakochristou

et al. 2017

Science and Technology for the Built Environment

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“…Anyway, comparison have been made by considering other simulations or experimental cases of literature having similarity with that one under discussion. In their paper, Noh et al (2007) investigated on thermal comfort and IAQ in a lecture room of dimensions 11.2 m (length), 6.4 m (width) and 2.4 m (height), equipped by a MAD ventilating system. They reported (see Fig.…”

Section: Comparison With Literature Resultsmentioning

confidence: 99%

“…On the other hand, despite the fact that all the thermal comfort parameters were within the range limit set out in the international standard ISO 7730 (ISO 1994), the occupant survey showed that more than 20% of the occupants were not satisfied with thermal comfort. A study proposed by Noh et al (2007) focused on thermal comfort and indoor air quality in a lecture theatre with a 4-way cassette air conditioning and mixing ventilation system. It is showed that increasing the discharge angle from the supply grilles on the cassette unit makes uniformity of thermal comfort worse, but rarely affects IAQ.…”

Section: Introductionmentioning

confidence: 99%

A multi-physical simulation on the IAQ in a movie theatre equipped by different ventilating systems

Petrone

Cammarata

2011

Build. Simul.

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The paper deals with a numerical multi-physical investigation on performance assured by different ventilating systems in supplying air quality and comfort conditions in a movie theatre hall. Mixing air distribution, under floor displacement and personalized air distribution systems are outlined in a given geometry. Momentum, energy and mass conservation equations are solved in order to highlight velocity fields, temperature distributions and carbon dioxide levels in each condition. Effectiveness of ventilation and mean age of air supplied to spectators are also computed giving further evaluation parameters in order to strike a balance between strong and weak points characterizing the studied systems.

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“…Memon assessed the thermal comfort within the classroom of a university in subtropical of Pakistan and found that more than 80 % of people were satisfied at an effective temperature of 32.5°C (Memon et al 2008 (Mors et al 2011). Noh et al studied thermal comfort and indoor air quality in lecture room (Noh et al 2007). Muhi and Butala studied the influence of thermal environment and air quality level on the employees in the mechanical ventilated administrative offices (Muhi and Butala 2004).…”

Section: Introductionmentioning

confidence: 99%

Optimization of environmental maintenance system used in a refuge chamber

Yang

Zhang

et al. 2015

Int J Coal Sci Technol

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Mine refuge chambers are used to shield miners who fail to escape from the mine when incidents occur. Environment maintaining system plays a key role in stabilizing thermal environment of a mine refuge chamber against heat emitted from metabolism and transferred from outside. The safety and comfort of refugees are closely related to the environment maintaining system design. In order to improve the comfort of refugees, optimization on the environment maintaining system has been done based on the previous work. To evaluate the environment of the chamber, eight volunteers were involved into the experiment. Under close observation and safety protection, they lived in a heat-isolated test chamber for 106 hours. The volunteers were asked to maintain low level of activities to simulate refugees' situation. It shows that the environment maintaining system worked well and the temperature, relative humidity and emitted harmful air content such as CO 2 and CO were all kept in the safety level, and no discomfort was felt by volunteers at all.

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Thermal comfort and indoor air quality in the lecture room with 4-way cassette air-conditioner and mixing ventilation system

Cited by 68 publications

References 8 publications

Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

A multi-physical simulation on the IAQ in a movie theatre equipped by different ventilating systems

Optimization of environmental maintenance system used in a refuge chamber

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