Performance optimization of a sidewall radiant heating system integrated with diffuse ceiling ventilation

Yang, Bin; Guo, Yuandong; Xu, Shuiqing; Su, Wei; Wu, M C; Wang, Faming

doi:10.1016/j.buildenv.2022.108881

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…The findings showed that irregular openings in the porous ceiling might improve the interior asymmetric thermal environment and reduce uncomfortable local draughts under various porous ceiling opening rates. The way in which fresh air was introduced toward the radiant heating room made a difference in the asymmetric thermal environment [11]. In evaluating the inside thermal environment, further particular considerations must be takeninto account given the differences in internal heat transmission processes compared tofrequently utilized air systems.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Hidden Radiant Ceiling Cooling Panel (RCCP) on Thermal Comfort and Energy Consumption in Ventilated Office Room with Transparent Ceiling: A CFD Analysis

ElDegwy

2023

Engineering Research Journal - Faculty of Engineering (Shoubra)

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The present study goal is to observe how the radiant ceiling performs in energy savings and thermal comfort in a ventilated office using CFD simulation. The boundary conditions for each CFD were all described. The profiles of air temperatures, Predicted Mean Vote (PMV), Predicted Percentage of Dissatisfied (PPD), and Draft Risk (DR) were examined to satisfy the comfort criteria of the ASHRAE standard. The effects of varying the temperature of the cooling panel, the air supply temperature, and the presence of air changes per hour (ACH) in the office space on thermal comfort and energy saving were investigated. A mesh is merged using more than 6 million optimized tetrahedral nodes. This investigation was reviewed to ensure that the program was consistent with the experimental results. The current study used the k-ε turbulence model after comparing it to previously published experimental results. Heat transmission by radiation was simulated using the Discrete Ordinates DO radiation model. This study found that the case selection (case 23252) actually has the advantage of energy-saving air conditioning, and its temperature is fixed at 25 °C, which is beneficial because the cooling water used in the cooling plate needs less energy than air in order to cool it (which has a large specific heat capacity and density).In this case, lower quality thermal systems such as geothermal energy or solar energy sources can be used to condition both the water and air supply.

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Section: Introductionmentioning

confidence: 99%

The Effect of Hidden Radiant Ceiling Cooling Panel (RCCP) on Thermal Comfort and Energy Consumption in Ventilated Office Room with Transparent Ceiling: A CFD Analysis

ElDegwy

2023

Engineering Research Journal - Faculty of Engineering (Shoubra)

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“…Three types of DCV panels are discussed in literature and these differ on specifications of pressure drop across the false ceiling and consequently the airflow characteristics in the ventilated room, see [3,24]. Experimental and numerical studies have explored DCV [32][33][34][35], while other studies have explored integration of other building technologies and strategies to enhance building ventilation performance [36][37][38][39]. Overall, DCV has several benefits over conventional duct-based ventilation.…”

Section: Introductionmentioning

confidence: 99%

On the Performance of Diffuse Ceiling Ventilation in Classrooms: A Pre-Occupancy Study at a School in Southern Sweden

Ogbuagu

Linden

MacCutcheon³

et al. 2023

Sustainability

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The implementation and application of diffused ceiling ventilation (DCV) is gradually gaining momentum, especially in Denmark, Finland, and the Netherlands. In countries such as Sweden, the application is limited despite the favorable conditions for implementation. The current study investigates the performance of DCV and mixing ventilation in a pre-occupancy field study for newly renovated classrooms in Southern Sweden. Two classrooms at the school were installed with diffuse ceiling ventilation while the rest had mixing ventilation. The objective of the study was to compare and evaluate the ventilation performance in terms of indoor environmental quality parameters such as thermal comfort, air quality indexes, airflow, and temperature distribution. Pre-occupancy measurements were performed in two classrooms with similar room characteristics, with one room running under mixing ventilation and the other under DCV. Constant temperature anemometers, thermocouples, and INNOVA thermal comfort were used to measure the indoor air speeds, temperature, and thermal comfort, respectively. Tracer gas measurements, with SF6, were performed to assess air quality. Additionally acoustic measurements were conducted to assess the acoustic benefits of DCV on reducing ventilation noise. The results demonstrate that DCV offers similar indoor environmental conditions to mixing ventilation but has better acoustic performance especially on reducing the ventilation noise. Indoor environmental conditions were very homogeneous under DCV with mixing ventilation showing tendencies for short circuit ventilation. This study demonstrates that DCV has a potential for implementation in Swedish schools with minimal system modification on existing ventilation and air distribution systems.

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Performance of a novel central heating system combined with personalized heating devices

Chen

et al. 2023

Applied Thermal Engineering

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Performance optimization of a sidewall radiant heating system integrated with diffuse ceiling ventilation

Cited by 10 publications

References 18 publications

The Effect of Hidden Radiant Ceiling Cooling Panel (RCCP) on Thermal Comfort and Energy Consumption in Ventilated Office Room with Transparent Ceiling: A CFD Analysis

The Effect of Hidden Radiant Ceiling Cooling Panel (RCCP) on Thermal Comfort and Energy Consumption in Ventilated Office Room with Transparent Ceiling: A CFD Analysis

On the Performance of Diffuse Ceiling Ventilation in Classrooms: A Pre-Occupancy Study at a School in Southern Sweden

Performance of a novel central heating system combined with personalized heating devices

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