Numerical investigation of thermal comfort during forced convection in an enclosure by means of experiments
Journal of Thermal Analysis and Calorimetry, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s10973-026-16397-0
- Dergi Adı: Journal of Thermal Analysis and Calorimetry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Chimica, Compendex, Index Islamicus, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: CFD, Energy efficiency, Radiant wall cooling, Sustainability, Thermal comfort, Ventilation
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
In radiant systems, the assessment of thermal comfort relies on PMV and on local conditions like surface temperatures and air velocities. The combination of displacement ventilation with radiant cooling systems can improve thermal comfort and energy efficiency by optimizing air temperature effectively and improving the temperature distribution. In the present work, the influence of forced convection on the thermal comfort of a mannequin within a space with radiant wall cooling and an advanced floor-level diffuser system is investigated. It validates a hybrid 3D CFD model based on experimental data and studies the effect of air velocities on mannequin’s comfort. The novel diffuser arrangement provides air having a temperature of 19.9 °C at velocities of 5 m s-1 and 10 m s-1 with a constant feed water temperature of 12.9 °C. This is done by combining a k-ω model with a hydronic radiant panel and forced convection. The model considers temperature and velocity circulations and PMV components for the radiant-cooled wall and overall indoor environment. Numerical modeling results showed that room air temperatures were 1.8–2.1 °C lower than experimental results (7–9% difference) but had similar vertical temperature profiles. Predicted PMV values were in the range of 0.2–0.4 at 5 m s-1 and about 0 or slightly negative at 10 m s-1. The PMV deviations at the height of the mannequin head were 0.05 at 5 m s-1 and 0.2 at 10 m s-1, which are both acceptable. When the feed rate was increased to 10 m s-1 the distribution of radiant temperature became more uniform. There were some localized increases in radiant temperature close to the mannequin, but these did not affect the overall central plane.