Experimental comparison of local low velocity unit combined with radiant panel and diffuse ceiling ventilation systems

Zhao, Weixin; Kilpeläinen, Simo; Kosonen, Risto; Jokisalo, Juha

doi:10.1177/1420326x20918398

Cited by 16 publications

(7 citation statements)

References 59 publications

(66 reference statements)

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“…In the earlier study, the low velocity unit combined with the radiant panel (LVRP) was introduced [35]. In that concept, the air was supplied downward over the head from 2.1 m level.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Thermal environment and ventilation efficiency in a simulated office room with personalized micro-environment and fully mixed ventilation systems

Zhao

Kilpeläinen

Kosonen

et al. 2021

Building and Environment

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“…In the earlier study, the low velocity unit combined with the radiant panel (LVRP) was introduced [35]. In that concept, the air was supplied downward over the head from 2.1 m level.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Thermal environment and ventilation efficiency in a simulated office room with personalized micro-environment and fully mixed ventilation systems

Zhao

Kilpeläinen

Kosonen

et al. 2021

Building and Environment

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“…Compared with related studies, 46,47 this paper mainly focused on the determination of the panel area and operation strategies of the radiant cooling panels with a dedicated fresh-air system. For different climatic regions, the variable climatic parameters can be imported into the proposed sensible cooling load equation and simplified PMV model to obtain the appropriate design and operation parameters.…”

Section: Indoor Design Parameters and Operation Strategiesmentioning

confidence: 99%

Thermal comfort analysis of radiant cooling panels with dedicated fresh-air system

Qin

Cui

Yang

et al. 2020

Indoor and Built Environment

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Radiant system has been increasingly applied in buildings due to its good thermal comfort and energy-saving potential. In this research, a simplified predicted mean vote (PMV) model and sensible cooling load equation were proposed based on human thermal comfort. Simulations were carried out using Airpak to explore relationships among thermal comfort characteristics, design and operation parameters. Results show that radiant surface temperature, fresh-air supply temperature and the area ratio are correlated approximately linearly with the indoor air temperature, while the relative humidity has little effect on the indoor air temperature. The indoor air velocity in the simulated environment was no more than 0.15 m/s, satisfying the requirements of limit values in the occupied zone. The results indicate that the optimum radiant surface temperature ( tc) is 19°C to 23°C when fresh-air supply temperature ( ts) is 26°C. The relative humidity ( φ) should be maintained at 50% to 70%, and the area ratio of radiant panels to total surfaces ( k1) should be kept within 0.15 to 0.38 when the radiant surface temperature is 20°C and the fresh-air supply temperature is 26°C. The simplified PMV model and the sensible load equation can provide reference for panel design based on characteristics of radiant cooling panels with a dedicated fresh-air system.

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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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Experimental comparison of local low velocity unit combined with radiant panel and diffuse ceiling ventilation systems

Cited by 16 publications

References 59 publications

Thermal environment and ventilation efficiency in a simulated office room with personalized micro-environment and fully mixed ventilation systems

Thermal environment and ventilation efficiency in a simulated office room with personalized micro-environment and fully mixed ventilation systems

Thermal comfort analysis of radiant cooling panels with dedicated fresh-air system

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

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