Thermal comfort: A review paper

Djongyang, Noël; Tchinda, René; Njomo, Donatien

doi:10.1016/j.rser.2010.07.040

Cited by 533 publications

(289 citation statements)

References 39 publications

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“…2 presents some basic features of the human thermoregulatory system. Findings from Djongyang et al [11] stated that, the controlled variable is an integrated value of internal temperature which is near the central nervous system and other deep body temperatures and skin temperature. The controlled system is influenced by internal (internal heat generation by exercise) and external (originating from environmental heat or cold) thermal disturbances.…”

Section: Discussionmentioning

confidence: 99%

Experimental Study of Temperature Effect on Human Skin: Discussion of Methodology

Ismail

Rosli

Jusoh

2013

AEF

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Abstract. This paper present the discussion of methods used in experimental studies of thermal comfort that only focus on the effect skin temperature of human. The study was conducted human subject tests in a controlled environment chamber for cooling conditions. This study was measure in the test climate chamber at Universiti Malaysia Pahang. Three broad methodology categories are compared which are experiments in which subjects have control of air temperature, relative humidity or neither. The local supply air temperatures were at 19, 25 and 32 o C while relative humidity was at 40, 55 and 70%. Together with a previously proposed diagram of basic features of the human thermoregulatory system may be used to specify limits for air temperature and relative humidity in the indoor environment.

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Section: Discussionmentioning

confidence: 99%

Experimental Study of Temperature Effect on Human Skin: Discussion of Methodology

Ismail

Rosli

Jusoh

2013

AEF

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“…There are two different basic approaches to thermal comfort in buildings: the rational or heat balance and the adaptive approach, respectively. 60 The former is based on experiments on human comfort in climate chambers in a steady state, most prominently represented by the work of Povl Ole Fanger. It employs a seven-point thermal sensation scale to determine the "Predicted Mean Vote" index, and from that the "Predicted Percentage Dissatisfied" is calculated-i.e., how many people will be dissatisfied under a given condition, including activity level, clothing, temperature, air speed, and relative humidity.…”

Section: Thermal Comfortmentioning

confidence: 99%

Energy in buildings—Policy, materials and solutions

Koebel

Wernery

Malfait

2017

MRS Energy & Sustainability

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Buildings account for ∼40% of global energy demands, and the increased adoption of innovative solutions for buildings represents an enormous potential to reduce energy demands and greenhouse gas emissions. Here, we critically review the current and future materials and solutions for the construction sector. We describe how policy affects innovative businesses and the adoption of new products and solutions. We investigate how the building envelope and user behavior determine building energy demands. Compared to conventional solutions, superinsulation materials (vacuum insulation panels, silica aerogel) can achieve the same thermal performance with drastically thinner insulation. With low-emissivity coatings and appropriate filler gasses, double and triple glazing reduces thermal losses by an order of magnitude. Vacuum and aerogel glazing reduce these even further. Switchable glazing solutions maximize solar gains during wintertime and minimize illumination demands whilst avoiding overheating in summer. Upon integration of renewable energy systems, buildings become both producers and consumers of energy. Combined with the dynamic user behavior, temporal variations in energy production require thermal and electrical storage and the integration of buildings into smart grids and energy district networks. The combination of these measures can reduce the energy consumption of the building's stock by a factor of three.

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“…Fanger's experiments showed that (i) skin wetness mainly indicates warm discomfort and mean skin temperature is strongly related to cold discomfort, (ii) skin wetness and mean skin temperature are both functions of activity level, and (iii) thermal dissatisfaction may be due to discomfort of the human body as a whole (general discomfort) or to the involuntary heating or cooling of one particular part of the body (local discomfort) (Djongyang, Tchinda, and Njomo, 2010). Specifically, the steady-state heat transfer model proposed by Fanger to describe thermal comfort requires that no local discomfort exist and that the human body be in heat balance.…”

Section: A Comfort Model Based On the Heat-balance Of The Human Bodymentioning

confidence: 99%