Human response to thermal environment and perceived air quality in an office with individually controlled convective and radiant cooling systems

Zhao, Weixin; Kilpeläinen, Simo; Kosonen, Risto; Jokisalo, Juha; Lestinen, Sami; Wu, Yuxin; Mustakallio, Panu

doi:10.1016/j.buildenv.2021.107736

Cited by 12 publications

(3 citation statements)

References 76 publications

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“…For this reason, many researchers have studied radiant solutions as a conditioning system since they can be considered among the technologies capable of meeting the requirements of sustainable heating and cooling [28]. Recently there has even been a boom of publications on experimental characterisation for the correct operation of this type of solution inside buildings [29][30][31], none of them applied in open spaces.…”

Section: Active Surfaces (Cooling and Heating Ceiling Pannel)mentioning

confidence: 99%

Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

et al. 2021

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The global need for healthy and safe open spaces faces continuous temperature rise due to the heat island phenomenon and climate change. This problem requires new strategies for improving the habitability of open spaces (indoor and outdoor conditions in buildings). These techniques include reducing solar radiation, reducing the temperature of surrounding surfaces, and reducing the air temperature. The radiant solutions are essential for outdoor comfort, both in summer and in winter. They are easy to integrate into open spaces. This study explores a new concept of radiant solutions adapted for outdoor spaces. The solution was evaluated in a test cell to obtain its thermal behaviour in different operation conditions. Solutions were optimised for operating in a cooling regimen since it has been identified that the demands for comfort in open spaces in hot climates during the most severe summer months are more pronounced. Experimental results have allowed getting an inverse model to analyse the thermal behaviour of the solution. The inverse model achieved high precision in its estimations. Also, it facilitated knowing the radiant and convective effects. Only the radiant heat flux is relevant in open spaces with a low level of air confinement. Finally, the discussion describes the application of the proposed model. The model allows the replicability of the solution—creating new designs (integration) or evaluating into different operating conditions of the system. This discussion demonstrates the high level of knowledge acquired in the characterisation of the solution studied.

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Section: Active Surfaces (Cooling and Heating Ceiling Pannel)mentioning

confidence: 99%

Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

et al. 2021

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“…Our previous studies [1][2][3] have focused on indoor climate, where two advanced micro-environment systems: personalized ventilation combined with radiant panel and low velocity unit combined with the radiant panel were studied. We analyzed the performance of two systems by physical measurements and short-term human subject tests.…”

Section: Introductionmentioning

confidence: 99%

Exploring the potentials of micro-environment ventilation in mitigating airborne transmission risk

et al. 2022

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In the background of COVID-19, new requirements are occurring in the novel ventilation systems to mitigate airborne transmission risk in indoor environments. In this study, two micro-environment ventilation systems: personalized ventilation combined with radiant panel system (PVRP) and low velocity unit combined with radiant panel system (LVRP) were studied to explore the potential of reducing the airborne infection risk. In a simulated double layout office, the droplets generated by a thermal breathing manikin were used to simulate the breathing process of an infected person. Opposite the manikin, a heated dummy was as an exposed person. During the 102-minute measurement, the results show that the infection risk at the inhaled air with micro-environment systems is lowest. The heat gain levels do have much effect on infection risk with the PVRP system, but higher heat gain will increase the risk slightly with the LVRP system.

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“…Additionally, previous research has shown that indoor climatic conditions in offices have a significant impact on human performance. Therefore, comfortable and healthy indoor conditions should be considered as the most important goal in energy efficient buildings containing modern offices [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermal Comfort in University Offices: The Case of the Bingöl University

Yaman¹,

Varolgüneş²,

Culun³

2021

cea

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Thermal comfort and indoor air conditions affect the mental and physical performance of users. People spend most of their time indoors. The thermal comfort conditions of these places directly affect the performance of individuals. Today, there are few examples of interior spaces with suitable conditions in terms of thermal comfort. Academician work offices in university buildings are also places where academics spend a long time. In this context, it is important to investigate and examine the thermal comfort conditions of these places and to put forward suggestions for improvement. For this reason, in this study, examinations were made in the offices of academicians in the Faculty of Engineering and Architecture. Within the scope of the study, 9 (nine) offices orientated in different directions were determined. Temperature, humidity, air movement and radiant temperature values were measured in the offices during January-February 2021, which is the period when the spaces in these offices should be heated. Measurements were made using a multi-functional air conditioner. The data obtained as a result of the measurements were interpreted according to the ASHRAE standard 55 and ISO 7730 limit values. It has been understood that the mean comfort temperature value found in all the offices of the university staff is in compliance with ASHRAE standards and the relative humidity of the air is insufficient.

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Human response to thermal environment and perceived air quality in an office with individually controlled convective and radiant cooling systems

Cited by 12 publications

References 76 publications

Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

Exploring the potentials of micro-environment ventilation in mitigating airborne transmission risk

Investigation of Thermal Comfort in University Offices: The Case of the Bingöl University

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