Adaptive Thermal Comfort: Principles and Practice

Nicol, Fergus; Humphreys, Michael; Roaf, Susan

doi:10.4324/9780203123010

Cited by 381 publications

(367 citation statements)

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“…In the case of in-vitro experiments, in which a number of subjects are exposed to a controlled chamber that usually have no windows, the subjective votes taken in the experiment are usually investigated in terms of whether or how they are correlated to the measured indoor environmental parameters of the experimental chambers. On the other hand, in the case of in-vivo experiment or field survey, the subjective votes are usually investigated in terms of whether or how they are correlated to the change in outdoor air temperature [55]. These conventional approaches to thermal-comfort study have revealed a lot, but there are still a number of issues that have not yet been fully investigated.…”

Section: Unsteady-state Human-body Exergy Analysismentioning

confidence: 99%

Unsteady-state human-body exergy consumption rate and its relation to subjective assessment of dynamic thermal environments

Schweiker

Kolařík

Dovjak

et al. 2016

Energy and Buildings

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Document Version Peer reviewed version Link back to DTU Orbit Citation (APA):Schweiker, M., Kolarik, J., Dovjak, M., & Shukuya, M. (2016). Unsteady-state human-body exergy consumption rate and its relation to subjective assessment of dynamic thermal environments. Energy and Buildings, 116, 164-180. DOI: 10.1016/j.enbuild.2016. ABSTRACTFew examples studied applicability of exergy analysis on human thermal comfort. These examples relate the human-body exergy consumption rate with subjectively obtained thermal sensation votes and had been based on steady-state calculation methods. However, humans are rarely exposed to steady-state thermal environments. Therefore, the first objective of the current paper was to compare a recently introduced unsteady-state model with previously used steady-state model using data obtained under both constant and transient temperature conditions. The second objective was to explore a relationship between the human-body exergy consumption rate and subjective assessment of thermal environment represented by thermal sensation as well as to extend the investigation towards thermal acceptability votes. Comparison of steady-state and unsteady-state model showed that results from both models were comparable when applied to data from environments with constant operative temperature. In contrast, when applied to data with temperature transients the prediction of particular models differed significantly and the unsteady-state model resulted in better prediction of mean skin temperature. The results of the present study confirmed previously indicated trends that lowest human body exergy consumption rate is associated with thermal sensation close to neutrality. Moreover, higher acceptability was in general associated with lower human body exergy consumption rate.

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Section: Unsteady-state Human-body Exergy Analysismentioning

confidence: 99%

Unsteady-state human-body exergy consumption rate and its relation to subjective assessment of dynamic thermal environments

Schweiker

Kolařík

Dovjak

et al. 2016

Energy and Buildings

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“…The algorithm finds a 'neutral temperature' which uses the running mean of the outdoor air temperature (with several versions that use the mean of temperatures calculated from 7 days up to a maximum of 30 days) to reflect changing thermal conditions and for which occupants feel no discomfort. It assumes an acceptable indoor air temperature within a 7 K range, depending on the circumstances and preferences of individuals within particular buildings in a single climate (Auliciems et al 1997;de Dear et al 1998;Nicol, Humphreys, and Roaf 2012;Humphreys, Nicol, and Roaf 2015).…”

Section: Adaptive Thermal Comfortmentioning

confidence: 99%

The importance of air movement in warmer temperatures: a novel SET* house case study

Shiel

Aynsley²,

Moghtaderi

et al. 2017

Architectural Science Review

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Surface temperatures increased rapidly in the last 100 years by 1 K (Kelvin), and could increase by a further 1.4 K in just 35 years, challenging building designers to provide comfort while minimizing carbon emissions. Ways to do this are with more effective indoor ventilation and lighter clothing for high temperatures and humidity, but some thermal simulation and rating systems do not consider these aspects. This paper reports on a novel simulation case study that estimated the heating and cooling energy used in a home in a Warm Temperate climate under a changing climate with a case-study method that used (1) CSIRO's Climate Futures online tool; (2) the Australian Nationwide House Energy Ratings Scheme (NatHERS) AccuRate simulation and ratings tool; (3) a special CSIRO humidity research engine and (4) alternative Standard Effective Temperature (SET*) comfort approaches. The results showed that (A) one SET* approach with air movement, changed clothing and occupant acclimatization saved over 95% of the NatHERS residential heating and cooling energy, and should be included in NatHERS; and (B) residential retrofits or occupant education is needed for warming temperatures. ARTICLE HISTORY

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“…It is personal and perceptual and therefore impossible to exactly specify, yet it is dependent on a large number of measurable variables. There is a wealth of research in the area of what thermal comfort is, its relation to outdoor conditions [36,37], profile of the subject [38] and activity of the subject [39] amongst many other variables [35,[40][41][42][43][44][45]. The most significant influence on indoor comfort is the air temperature.…”

Section: Occupantsmentioning

confidence: 99%

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

Byrne

O’Donnell

et al. 2016

Energy and Buildings

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a b s t r a c tThe residential sector represents 27% of primary energy consumption in Ireland. This paper examines the case study of the Irish government's national grant scheme to encourage energy efficiency retrofit in private housing. That is the Home Energy Saving (HES) Scheme, later rebranded the Better Energy: Homes (BEH) Scheme. The methodology involved monitoring several homes immediately before and after retrofit alongside discussions with occupants. The examination focused on specific measures commonly introduced through the HES/BEH programme − cavity and external wall insulation. It has been found that a significant decrease in heat loss through the walls was measured in all cases. Regardless, the occupant played a considerable role in the change in energy use in the buildings, and the main motivation for retrofit was found to be comfort and not energy savings or environmental concerns. As a result, the actual energy savings are notably less than the potential savings had the pre and post comfort levels remained the same.

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Adaptive Thermal Comfort: Principles and Practice

Cited by 381 publications

References 0 publications

Unsteady-state human-body exergy consumption rate and its relation to subjective assessment of dynamic thermal environments

Unsteady-state human-body exergy consumption rate and its relation to subjective assessment of dynamic thermal environments

The importance of air movement in warmer temperatures: a novel SET* house case study

Case studies of cavity and external wall insulation retrofitted under the Irish Home Energy Saving Scheme: Technical analysis and occupant perspectives

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