Analysing thermal comfort perception of students through the class hour, during heating season, in a university classroom

Mishra, Asit Kumar; Derks, Mth Manon; Kooi, L; Loomans, Mglc Marcel; Kort, Hsm Helianthe

doi:10.1016/j.buildenv.2017.09.016

Cited by 57 publications

(65 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings could shed light on the findings in previous field studies of spatial transition from outdoors to indoors [ [33], [34], [35], [36]]. They generally found that occupant (visitors) who just arrived the buildings tended to feel warmer than those who stayed longer.…”

Section: Discussionsupporting

confidence: 71%

Transient human thermophysiological and comfort responses indoors after simulated summer commutes

Zhai

Zhao

Yang

et al. 2019

Building and Environment

View full text Add to dashboard Cite

The current study investigates the transient human physiological and comfort responses during sedentary activity following a period of elevated activity in a hot condition. Such metabolic and thermal down-steps are common in buildings as occupants arrive after commuting in summer. It creates a serious problem for thermostatic control, since arriving occupants find their transition uncomfortably warm at temperatures that resident occupants find comfortable. Fifty-nine participants (29 men, 30 women) dressed in 0.6 clo were tested while sedentary for 60 min in 26 °C, after having been exposed to 30 °C for 15min, during which they performed activities metabolically simulating commuting: sitting (SE-1.2 met), or doing three levels of stair-step exercises: low (LEx-2.2 met), medium (MEx-3.0 met), and high (HEx-4.4 met). Subjective comfort and physiological responses (metabolic rate, skin temperature, skin blood flow rate, heart rate, core temperature, and skin wettedness) were collected. Results show that sedentary conditions at 26°C became comfortable and acceptable within 2 min, but thermal sensation required much longer to change from 'warm' or 'hot' to 'neutral': 0, 8, 17, 30 min after SE, LEx, MEx, HEx respectively. Skin wettedness and core temperature did not recover within the60 min. The delays are mainly due to body heat stored during the exercise. A room temperature of 26°C may not provide sufficient cooling after summer commuting. Localized convective cooling of transitional spaces and work areas by ceiling or desk fans represent a way to enhance comfort recovery.

show abstract

Section: Discussionsupporting

confidence: 71%

Transient human thermophysiological and comfort responses indoors after simulated summer commutes

Zhai

Zhao

Yang

et al. 2019

Building and Environment

View full text Add to dashboard Cite

show abstract

“…The classrooms in this study are identified according to the Building number, Floor, and Classrooms number (BFC). B refers to the Building number (Building 10 in this study), F refers the floor where the classroom is located (1)(2)(3)(4), and C is the number of the classroom in each floor (01-07). The data were collected in the building 10, at the Universidad de la Costa, because during the academic semester, different criteria were found by the students about the sensation of cold or heat they felt during the time they spent inside the premises, which is an average of 3 h per lecture.…”

Section: Case Study: Educational Building At the Universidad De La Costamentioning

confidence: 99%

“…A suitable thermal environment for classrooms in colleges and universities impacts thermal comfort, learning performance, and the building energy consumption. Students spend a lot of time in the classroom, and studies have shown the importance of thermal comfort in student achievement [1][2][3][4]. Thermal comfort is established as a personal perception of the thermal environment [5,6] and it is characterized as the neutral sensation experienced by the person in relation to a given thermal environment, avoiding sweat [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Analysis of Thermal Comfort in a University Campus Building in Tropical Climate

et al. 2020

View full text Add to dashboard Cite

This study presents the evaluation of the performance and acceptability of thermal comfort by students in the classrooms of a university building with minisplit-type air-conditioning systems, in a tropical climate. To carry out the study, temperature and humidity measurements were recorded, both outside and inside the selected classrooms, while the students were asked to complete thermal surveys on site. The survey model is based on the template proposed by Fanger and it was applied to a total number of 584 students. In each classroom, the Predicted Mean Vote (PMV) and the Predicted Percentage Dissatisfied (PPD) were estimated according to Fanger’s methodology, as well as the Thermal Sensation Vote (TSV) and the Actual Percentage Dissatisfied (APD), which were obtained from the measurements and the surveys. The results of this study showed that the PMV values, although they may vary with the insulation of the clothing, do not affect the TSV. Furthermore, comparing PMV vs. TSV scores, a 2 °C to 3 °C difference in operating temperature was found, whereby the thermal sensitivity for TSV was colder, so it could be assumed that the PMV model overestimates the thermal sensitivity of students in low-temperature conditions. In addition, an acceptability by 90% with thermal preferences between 23 °C and 24 °C were also found. These results indicate that it is possible to increase the temperature set point in minisplit-type air-conditioning system from 4 °C to 7 °C with respect to the currently set temperatures, without affecting the acceptability of the thermal environment to the students in the building.

show abstract

“…The measurements and the questionnaire survey were performed after at least 30 min of the occupants entering the room. This time is enough to adopt to the new environment, as pointed out by Mishra et al [40].…”

Section: Methodsmentioning

confidence: 93%

Assessment of Thermal Comfort in the Intelligent Buildings in View of Providing High Quality Indoor Environment

Majewski¹,

Orman

Telejko

et al. 2020

Energies

View full text Add to dashboard Cite

The paper analyses the indoor environment in two modern intelligent buildings located in Poland. Measurements of air and globe temperatures, relative humidity and carbon dioxide concentration in 117 rooms carried out in the space of 1.5 years were presented. Thermal comfort of the occupants has been investigated using a questionnaire survey. Based on 1369 questionnaires, thermal sensation, acceptability and preference votes were analysed in view of their interdependency as well as their dependency on operative temperature, which proved to be very strong. It has been found that the respondents did not completely rate thermal comfort and indoor environment quality as very high, although the overwhelming sensations were positive. Apart from the operation of heating, ventilation and air conditioning (HVAC) systems, this might have also been the cause of individual human factors, such as body mass index, as tested in the study, or the finding that people were generally in favour of a warmer environment. Moreover, thermal environment proved to be the most important element for ensuring the well-being of the occupants.

show abstract

Analysing thermal comfort perception of students through the class hour, during heating season, in a university classroom

Cited by 57 publications

References 15 publications

Transient human thermophysiological and comfort responses indoors after simulated summer commutes

Transient human thermophysiological and comfort responses indoors after simulated summer commutes

Experimental Study and Analysis of Thermal Comfort in a University Campus Building in Tropical Climate

Assessment of Thermal Comfort in the Intelligent Buildings in View of Providing High Quality Indoor Environment

Contact Info

Product

Resources

About