The Correlation Between PMV and Dissatisfaction on the Basis of the ASHRAE and the McIntyre Scale — Towards an Improved Concept of Dissatisfaction

Grabe, Jörn von; Winter, Stefan

doi:10.1177/1420326x08089364

Cited by 24 publications

(18 citation statements)

References 2 publications

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“…The mean radiant temperature in the older people's centers was $4% below the air temperature (R ¼ 0.89, p50.0001, t-test). For the older people's centers (sites [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], thermal votes of 403 occupants (303 females and 100 males) were collected; 384 out of these 403 occupants were older people (age ! 60 years) and 19 were staff at the centers.…”

Section: Field Study Of Thermal Environmentsmentioning

confidence: 99%

“…Thermal environment relates to the perception of satisfaction of the subject and is primarily dependent on the air temperature, the radiant temperature, the air velocity, and the relative humidity of the perceived environment to the person at his/her metabolic rate and the kind of clothing he/she is wearing [10]. Studies of thermal sensation reported linear regressions of the Predicted Mean Vote (PMV) on a 7-point ASHRAE scale of thermal sensation to the operative temperature or the effective temperature in order to derive the neutral temperature, which was the temperature at which the occupants felt ''neutral'' and would not vote either on the warm side or the cool side [11]. However, the PMV index is generally applied to evaluate thermal environments so that the results can be compared with those from other investigations [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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A Field Survey of the Expected Desirable Thermal Environment for Older People

Wong

Fong

Mui

et al. 2009

Indoor and Built Environment

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In order to identify an indoor thermally comfortable environment for older people, this study examined the thermal acceptance of 384 older people of ages from 60 to 97 years under various thermal environmental conditions in 19 centers for older people in Hong Kong. The results were compared to those of the younger residents in Hong Kong. A probable decay of one predicted mean vote (PMV) for every 25.3 years was reported for older people beyond the age of 60 years ( p 0.05), which indicated that the older age group probably has a different expectation of a thermoneutral environment as compared with younger age groups. It was also noted that the expected PMV for a thermoneutral environment of older females was apparently higher than that for older males in the same age group. The results should be a useful reference for an acceptable thermally comfortable environment in centers for older people up to the age group over 90 years. NomenclatureA g ¼ Age I cl ¼ Clothing value (clo) C op ¼ Weighting factor for the convective and radiant heat transfer G, H ¼ Designation for occupant groupsT ¼ Temperature (8C) V ¼ Velocity (ms À1 ) ¼ Percentile value from 0% to 100% ¼ Mean

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Section: Field Study Of Thermal Environmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Field Survey of the Expected Desirable Thermal Environment for Older People

Wong

Fong

Mui

et al. 2009

Indoor and Built Environment

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“…Furthermore, thermal sensations outside of the three central categories of the ASHRAE 7-point scale of thermal sensation do not necessarily reflect discomfort for a substantial number of persons. Von Grabe and Winter 52 showed that people who are voting -2 and +2 on the ASHRAE 7-point scale of thermal sensation or beyond are not necessarily dissatisfied. Also, people who are voting between -1 and 1 are not necessarily satisfied with their thermal environment either 52 .…”

Section: Semantics and Thermoneutrality As An Idealmentioning

confidence: 99%

“…Von Grabe and Winter 52 showed that people who are voting -2 and +2 on the ASHRAE 7-point scale of thermal sensation or beyond are not necessarily dissatisfied. Also, people who are voting between -1 and 1 are not necessarily satisfied with their thermal environment either 52 .…”

Section: Semantics and Thermoneutrality As An Idealmentioning

confidence: 99%

Thermal comfort: research and practice

Mazej²,

2010

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Thermal comfort -the state of mind, which expresses satisfaction with the thermal environment-is an important aspect of the building design process as modern man spends most of the day indoors. This paper reviews the developments in indoor thermal comfort research and practice since the second half of the 1990s, and groups these developments around two main themes; (i) thermal comfort models and standards, and (ii) advances in computerization. Within the first theme, the PMV-model (Predicted Mean Vote), created by Fanger in the late 1960s is discussed in the light of the emergence of models of adaptive thermal comfort. The adaptive models are based on adaptive opportunities of occupants and are related to options of personal control of the indoor climate and psychology and performance. Both models have been considered in the latest round of thermal comfort standard revisions. The second theme focuses on the ever increasing role played by computerization in thermal comfort research and practice, including sophisticated multi-segmental modeling and building performance simulation, transient thermal conditions and interactions, thermal manikins.

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“…Different area can have different thermal comfort model and a subject's thermal sensation would be different according to individual, race, climate, habits and customs, etc. Researches on adaptive thermal comfort studies have been carried out and thermal comfort standards and comfortable temperature could be variable in different countries or areas as the literature [6][7][8][9][10][11][12][13][14][15] shows. The thermal environment in ship cabins may be different from that in land buildings and the thermal conditions in land buildings would not reflect the real conditions in ship cabins.…”

mentioning

confidence: 99%

An Investigation and Analysis of Indoor Environment in Air-Conditioned Chinese Ship Vessel Cabins

Liu

Xing

et al. 2011

Indoor and Built Environment

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This paper focuses on the field measurement and evaluation of the indoor thermal environment in airconditioned vessel cabins. Questionnaires were collected in this study to appraise thermal sensation vote (TSV) of crews and passengers in specific ship cabins environment during a hot season. Predicted mean vote (PMV) was calculated based on the field environmental data. The neutral temperature was 22.6 C for passengers, 22.9 C for the working crews and 20.9 C for resting crews based on calculation using TSV regression. From PMV regression, the neutral temperature was 24.0 C for passengers, 25.1 C for working crew and 24.7 C for resting crew. Predicted neutral temperature from PMV is higher than the neutral temperature from TSV. Human factors of crew, metabolism rate and clothing insulation were reasonably modified in order to minimise the differences between TSV and PMV and predict PMV accurately. Investigation of the thermal preference and productivity of the crews were also carried out during the field experiment. The results showed that female subjects or elderly subjects (above 40) preferred working in warmer environment and that neutral temperature can not ensure high productivity. Therefore, variance exists between thermal sensation and thermal preference. From the field data analysis, productivity of the crew in slightly cool or slightly warm environment was higher than that in the environment with neutral temperature. Productivity is 101.7% when TSV is 0 and reaches the peak of 105.1% in slightly cool environment. A TSV-Productivity polynomial regression equation was established based on field investigation data.

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The Correlation Between PMV and Dissatisfaction on the Basis of the ASHRAE and the McIntyre Scale — Towards an Improved Concept of Dissatisfaction

Cited by 24 publications

References 2 publications

A Field Survey of the Expected Desirable Thermal Environment for Older People

A Field Survey of the Expected Desirable Thermal Environment for Older People

Thermal comfort: research and practice

An Investigation and Analysis of Indoor Environment in Air-Conditioned Chinese Ship Vessel Cabins

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