A Bayesian Network approach to the evaluation of building design and its consequences for employee performance and operational costs

Jensen, Kasper Lynge; Toftum, Jørn; Friis-Hansen, Peter

doi:10.1016/j.buildenv.2008.04.008

Cited by 113 publications

(71 citation statements)

References 8 publications

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“…It is suggested by Wyon that the thermal state of the body determines arousal thus also performance [32], therefore warm temperatures may reduce performance by inducing warm sensations [33][34]. Since air movement can offset warm temperatures and maintains occupants' thermal state close to neutral, it may maintain performance close to that at neutral temperatures.…”

Section: 226mentioning

confidence: 99%

Comfort under personally controlled air movement in warm and humid environments

Zhai

Zhang

et al. 2013

Building and Environment

188

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This study examined the effects of personally controlled air movement on human thermal comfort and perceived air quality (PAQ) in warm-humid environments. At temperatures 26, 28, and 30°C, and relative humidity (RH) 60% and 80%, sixteen human subjects were exposed to personally controlled air movement provided by floor fans in an environmental chamber. The subjects reported their thermal sensation, thermal comfort, and PAQ during the tests. Two breaks periods with elevated metabolic levels were used to simulate normal office activities. Results show that with personally controlled air movement, thermal comfort could be maintained up to 30°C and 60% RH, and acceptable PAQ could be maintained up to 30°C 80% RH, without discomfort from humidity, air movement or eye-dryness. Thermal comfort and PAQ were resumed within 5 minutes after the breaks. The 80% acceptable limit implicit in comfort standards could be extended to 30°C and 60% RH. The average energy consumed by the fans for maintaining comfort was lower than 10W per person, making air movement a very energy-efficient way to deliver comfort in warm-humid environments.

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Section: 226mentioning

confidence: 99%

Comfort under personally controlled air movement in warm and humid environments

Zhai

Zhang

et al. 2013

Building and Environment

188

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“…Jensen et al [19] analysed the relationship between thermal sensation votes and workers' performance in different building designs through a Bayesian Network Approach and adopted a performance index to assess the economic impact of indoor environmental conditions, with particular attention to the effects of temperature on mental performance. Schiavon and Zecchin [28] underlined the importance of accounting for the relationship between IEQ and workers' performance in cost-benefit analyses, estimating that an increment of 1% of the work performance can payback the running annual energy cost.…”

Section: F1: Impact Of the Environmental Conditions On Workers' Perfomentioning

confidence: 99%

A Co-Citation Analysis on Thermal Comfort and Productivity Aspects in Production and Office Buildings

2017

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Abstract:In this work, the literature about the relationship between thermal comfort and productivity in workplaces is reviewed and explored by means of a co-citation analysis-i.e., a factor analysis applied to the mutual citations of the most relevant contributions. A structure of three main clusters of papers describing the relationships between workers' thermal comfort and productivity were identified according to the factor analysis and then confirmed with a multidimensional scaling. Results indicate that comfortable indoor thermal conditions can have beneficial impacts on workers' well-being and productivity, such as higher operational rates, lower production losses, fewer sick leaves, and reduced health related costs. Some authors proposed analytical and empirical expressions for the quantification of the impact of thermal comfort on productivity; nevertheless, due to the broad spectrum of activities and their applicability, the literature is still far from reaching a general consensus on the potential impact of comfort/discomfort on productivity and proposed models can vary significantly in the different studies.

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“…Jensen et al [15] describes a method to evaluate the effects of temperature on occupants' performance during a year in a mechanically ventilated building. It can be used to compare different building designs in order to evaluate the best performing design according to total economy (cost of investment, energy cost and productivity of the occupants).…”

Section: Estimated Influence On Occupants' Performancementioning

confidence: 99%

“…These data combined with a bayesian network model enables estimation of individual differences in how people are affected by the thermal environment even though they are exposed to identical conditions. Using the hourly temperature output from the simulations, the performance model of Jensen et al [15] was used to calculate a yearly performance index (PI), which describes the relative loss of performance. The PI describes the time-weighted performance of office employees in a given building design alternative and the ensuing thermal environment during the considered period.…”

Section: Estimated Influence On Occupants' Performancementioning

confidence: 99%

Simulation of energy use, human thermal comfort and office work performance in buildings with moderately drifting operative temperatures

Kolařík

Toftum

Olesen

et al. 2011

Energy and Buildings

Self Cite

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Annual primary energy use in a central module of an office building consisting of two offices separated with a corridor was estimated by means of dynamic computer simulations. The simulations were conducted for conventional all-air VAV ventilation system and Thermo Active Building System (TABS) supplemented with CAV ventilation. Simulations comprised moderate, hot-dry and hot-humid climate. Heavy and light wall construction and two orientations of the building (east-west and north-south) were considered. Besides the energy use, also capability of examined systems to keep a certain level of thermal comfort was examined. The results showed that with the moderate climate, the TABS decreased the primary energy use by about 16% as compared with the VAV. With hothumid climate, the portion of the primary energy saved by TABS was ca. 50% even with the supply air dehumidification taken into account. The TABS working in a moderate climate kept the Predicted Percentage of Dissatisfied (PPD) <10% during 60% to 80% of the working hours per year. Optimization of the TABS's control strategy (circulation pump dead-band, water supply temperature) resulted in significant reduction of the annual working hours with PPD>10%; 1.4% in comparison to 17.5% hours/year. The highest estimated loss of occupants' productivity related to their thermal sensation hasn't exceeded 1% in whole year average.

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A Bayesian Network approach to the evaluation of building design and its consequences for employee performance and operational costs

Cited by 113 publications

References 8 publications

Comfort under personally controlled air movement in warm and humid environments

Comfort under personally controlled air movement in warm and humid environments

A Co-Citation Analysis on Thermal Comfort and Productivity Aspects in Production and Office Buildings

Simulation of energy use, human thermal comfort and office work performance in buildings with moderately drifting operative temperatures

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