Full-scale test and CFD-simulation of radiant panel integrated with exposed chilled beam in heating mode

Mustakallio, Panu; Kosonen, Risto; Korinkova, Anna

doi:10.1007/s12273-016-0309-0

Cited by 14 publications

(5 citation statements)

References 12 publications

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“…This airflow was attracted to the area where relatively low-density air was distributed as cold air descended. When comparing this with Myhren's results [25], which reflect the infiltration condition, the velocity of the airflow in the vicinity of the window was distributed at high values owing to the high temperature and related attraction effect of the RFHS, even without infiltration, and the entry of this airflow into the inside of the room was shown. Moreover, as the radiant area of the RFHS was applied more widely and the surface temperature was applied less, the velocity of the airflow from the floor surface was reduced.…”

Section: Velocity Profilessupporting

confidence: 57%

“…Similarly, Myhren [24] analyzed the airflow velocity distribution in the room according to various heating methods to evaluate the reduction of downdraft through the heating of cooled air. In Mustakallio's study [25], thermal conditions of an office room with a CBRP (chilled beam having an integrated radiant panel) in heating mode were analyzed. The results of this study indicate that radiant panel heating is also an applicable solution in cold climates.…”

Section: Preliminary Study Of Downdraft Assessmentmentioning

confidence: 99%

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Downdraft Assessment of Glass Curtain Wall Buildings with a Radiant Floor Heating System

et al. 2017

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Abstract:The present study aims to evaluate whether downdraft can be prevented by applying a radiant floor heating system in glass curtain wall buildings. A radiant floor heating system does not directly supply heat to cold air, but does so via heat exchange with a cold airflow. Assessing whether a downdraft is prevented is, thus, necessary. For this assessment, a radiant floor heating system was applied to perimeter zones with different window types modeled using a computational fluid dynamics (CFD) simulation. The relationship between the radiant floor heating system and the windows was examined via an assessment of the resulting downdraft by considering the radiant heat exchange effect between the window and the floor. The assessment was conducted by utilizing a CFD simulation. The simulation results show that the temperature difference between the air supplied through the radiant floor heating system and the air descending along the cold surface of the window increased when the radiant floor heating system was applied to a narrow area with a high temperature. Furthermore, the airflow velocity increased with the heat exchange. The airflow re-entered the window side, and the downdraft in the occupied area exceeded the strict value specified by the standards. Conversely, if heat were applied according to the indoor thermal output by widening the radiant heat area of the radiant floor heating system, a downdraft could occur as a result of a blocking failure prior to the influx of the cold air into the occupied area caused by low surface temperatures. Therefore, applying a radiant floor heating system is advantageous in a perimeter zone without causing airflow inducement at the window side with acceptable surface temperatures.

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Section: Velocity Profilessupporting

confidence: 57%

Section: Preliminary Study Of Downdraft Assessmentmentioning

confidence: 99%

Downdraft Assessment of Glass Curtain Wall Buildings with a Radiant Floor Heating System

et al. 2017

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“…To overcome the limitations of thermal comfort assessment experiments, Schellen [13] analyzed air velocity and draft rate according to window height and surface temperature using CFD simulations, while Jurelionis [14] simulated the occurrence of downdraft through the distribution of PPD (Predicted Percentage Dissatisfied) in the indoor environment and compared the results with those of Heiselberg and Manz. Additionally, Myhren [15] analyzed indoor air velocity distribution depending on various heating methods to evaluate the degree of downdraft reduction through the heating of cooled air, and Mustakallio [16] analyzed the thermal environment in an office building with a CBRP (chilled beam having an integrated radiant panel) for heating. Maxime Tye-Gingras [17] analyzed indoor airflow based on the radiative heat exchange effect between the radiant system and the window or surrounding walls, as well as the convective heat transfer effect with the surrounding air layer.…”

Section: Preliminary Study 21 Review Of Preliminary Studies On Therma...mentioning

confidence: 99%

A Study on Establishing Thermal Output Conditions of Radiant Ceiling Heating Panels for Improving Thermal Comfort of Perimeter Zone in Buildings

Joe¹,

Park

2023

Applied Sciences

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Amid concerns over airflow-induced transmission of the COVID-19 virus in buildings frequented by large numbers of people, such as offices, the necessity for radiant ceiling heating panels has increased. This is due to the concern that the airflows emitted from the convection heating systems installed near the ceiling or windows for winter heating may be a major cause of COVID-19 transmission. In this study, we aim to evaluate thermal comfort under various indoor and outdoor environmental conditions of a building and present the thermal output conditions of the radiant ceiling heating panel that can replace the convection heating system while ensuring comfort in the perimeter zone and handling the heating load. As a result, we were able to present, in a chart format, the thermal output conditions that can secure thermal comfort by analyzing the indoor airflow distribution depending on the surface temperature of the radiant ceiling heating panel, the interior surface temperature of the window, and the influence of internal heat generation. Moreover, through derived empirical formulas, we were able to determine the heating conditions of the panel that can secure the necessary heat dissipation while minimizing discomfort, such as downdrafts, even for indoor and outdoor conditions that were not evaluated in this study.

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“…The simulated warm window surface was mimicked by the heated panels where heated water circulates. In this study, the surface temperatures of window panels were controlled to cover the target heat load level set (Mustakallio et al, 2017). Thus, depending on heat gain level, the surface temperature of window varied.…”

Section: Diffuse Ceiling Ventilation Systemmentioning

confidence: 99%

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

Zhao

Kilpeläinen

Kosonen

et al. 2021

Building and Environment

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Full-scale test and CFD-simulation of radiant panel integrated with exposed chilled beam in heating mode

Cited by 14 publications

References 12 publications

Downdraft Assessment of Glass Curtain Wall Buildings with a Radiant Floor Heating System

Downdraft Assessment of Glass Curtain Wall Buildings with a Radiant Floor Heating System

A Study on Establishing Thermal Output Conditions of Radiant Ceiling Heating Panels for Improving Thermal Comfort of Perimeter Zone in Buildings

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

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