Thermal sensation and comfort models for non-uniform and transient environments, part II: Local comfort of individual body parts

Zhang, Hui; Arens, Edward; Huizenga, Charlie; Han, Taeyoung

doi:10.1016/j.buildenv.2009.06.015

Cited by 284 publications

(128 citation statements)

References 14 publications

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“…Note: Meanings of variables are the same as that in Table 5. Figure 9 presents the thermal comfort for the numerical thermal manikin located at the ninth row in different cases, evaluated by using the UC Berkeley thermal comfort model [21]. It indicates that thermal comfort for the thermal manikin was greatly affected by the height of return grille, which was especially obvious at head level.…”

Section: Terraced Classroommentioning

confidence: 99%

Investigations on the Energy Efficiency of Stratified Air Distribution Systems with Different Diffuser Layouts

Cheng

Yang

et al. 2016

Sustainability

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This paper investigated the influence of diffuser layouts on the energy performance of stratified air distribution systems (STRAD). The energy saving potentials of STRAD systems are theoretically analyzed. The cooling coil load of a STRAD system is proportion to the return air temperature, while inversely proportional to the exhaust air temperature. Based on that, numerical studies are conducted for the applications of STRAD systems in three typical building space types. Two evaluation indices are developed to assess the energy performance of STRAD systems. The simulation results demonstrated that further energy saving could be achieved by keeping the exhaust grille at ceiling level and decreasing the height of return grille. Therefore, in order to optimize the energy saving capacity of STRAD systems, the return grille is recommended to be located as low as possible, whilst paying special attention on the "short-circuit" of cold supply air. Furthermore, when the STRAD system is applied in large space buildings with a big horizontal span, supply diffusers should be distributed surrounding the occupied zone as uniformly as possible, while avoiding installing return diffusers at exterior walls.

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Section: Terraced Classroommentioning

confidence: 99%

Investigations on the Energy Efficiency of Stratified Air Distribution Systems with Different Diffuser Layouts

Cheng

Yang

et al. 2016

Sustainability

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“…Alliesthesia is a concept that describes the physiological basis for thermal pleasure or delight (de Dear, 2011;Parkinson & de Dear, 2015;Parkinson, de Dear, & Câ ndido, 2012;Zhang, Arens, Huizenga, & Han, 2010a, 2010b. The earliest studies (Cabanac, 1971) began with the premise that these hedonic, or pleasurable, sensations are generated by the dynamic response of thermoreceptors, and focused exclusively on transient effects.…”

Section: From Thermal Neutrality To Delightmentioning

confidence: 99%

Evolving opportunities for providing thermal comfort

Brager

Zhang

Arens

2015

Building Research & Information

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139

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The building industry needs a fundamental paradigm shift in its notion of comfort, to find low-energy ways of creating more thermally dynamic and non-uniform environments that bring inhabitants pleasure. Strategies for providing enriched thermal environments must be conjoined with reducing energy; these are inseparable for any building striving for high performance. The objective of current comfort standards is to have no more than 20% of occupants dissatisfied, yet buildings are not reaching even that scant goal. A significant energy cost is incurred by the current practice of controlling buildings within a narrow range of temperatures (often over-cooling in the summer). If building designers and operators can find efficient ways to allow building temperatures to float over a wider range, while affording occupants individual control of comfort, the potential for energy savings is enormous. Five new ways of thinking, or paradigm shifts, are presented for designing or operating buildings to provide enhanced thermal experiences. They are supported by examples of research conducted by the Center for the Built Environment, and include shifts from centralized to personal control, from still to breezy air movement, from thermal neutrality to delight, from active to passive design, and from system disengagement to improved feedback loops.

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“…The local thermal sensation is a basic subjective quantity that determines the overall sensation, the local comfort, and the overall comfort. After validation measurements Zhang published the revisited model [9][10][11] that correlates better with the experimental data. In the revision of the model was improved an evaluation of the overall thermal sensation.…”

Section: Model Of Thermal Comfortmentioning

confidence: 99%

“…This paper presents coupling of the modified Tanabe model of human physiology with the revisited thermal comfort model by Zhang [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Coupling of the Models of Human Physiology and Thermal Comfort

Pokorný

Jícha

2013

EPJ Web of Conferences

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Abstract. A coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. A coupling combines a modified Tanabe model of human physiology and thermal comfort model developed by Zhang. The Coupled model allows predicting the thermal sensation and comfort of both local and overall from local boundary conditions representing ambient and personal factors. The aim of this study was to compare prediction of the Coupled model with the Fiala model prediction and experimental data. Validation data were taken from the literature, mainly from the validation manual of software Theseus-FE [1]. In the paper validation of the model for very light physical activities (1 met) indoor environment with temperatures from 12 °C up to 48 °C is presented. The Coupled model predicts mean skin temperature for cold, neutral and warm environment well. However prediction of core temperature in cold environment is inaccurate and very affected by ambient temperature. Evaluation of thermal comfort in warm environment is supplemented by skin wettedness prediction. The Coupled model is designed for non-uniform and transient environmental conditions; it is also suitable simulation of thermal comfort in vehicles cabins. The usage of the model is limited for very light physical activities up to 1.2 met only.

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Thermal sensation and comfort models for non-uniform and transient environments, part II: Local comfort of individual body parts

Cited by 284 publications

References 14 publications

Investigations on the Energy Efficiency of Stratified Air Distribution Systems with Different Diffuser Layouts

Investigations on the Energy Efficiency of Stratified Air Distribution Systems with Different Diffuser Layouts

Evolving opportunities for providing thermal comfort

Coupling of the Models of Human Physiology and Thermal Comfort

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