01UUVNB_E03_Local discomfort.pdf

Politecnico di Torino Academic Year: 2022/23 Master of science in: Building Engineering (specialist pathway in: Green Building) Course: Energy performance design and indoor environmental quality Course holder: Prof. Vin...

Politecnico di Torino Academic Year: 2022/23 Master of science in: Building Engineering (specialist pathway in: Green Building) Course: Energy performance design and indoor environmental quality Course holder: Prof. Vincenzo Corrado Thermal Comfort: Practical lecture Ing. Simona Paduos [email protected]  Local discomfort High vertical air Floor temperature Draught temperature difference High radiant temperature asymmetry AY 2022/23 Energy performance design and indoor environmental quality 2  Local discomfort High vertical air Floor temperature Draught temperature difference High radiant temperature asymmetry AY 2022/23 Energy performance design and indoor environmental quality 3  Additional requirement n° 1 The vertical air temperature difference between head and ankles should be: 3°C for category B 2.1°C for category A Category PPD % PD (vertical Dt) A < 6% < 3% B < 10% < 5% C < 15% < 10% AY 2022/23 Energy performance design and indoor environmental quality 4  Local discomfort AY 2022/23 Energy performance design and indoor environmental quality 5  Additional requirement n° 2 The floor temperature should be: In between 19 °C and 26°C Tfloor = 20°C winter Tfloor = 26°C summer Category PPD % PD (floor temp.) A < 6% < 10% B < 10% < 10% C < 15% < 15% AY 2022/23 Energy performance design and indoor environmental quality 6  Local discomfort AY 2022/23 Energy performance design and indoor environmental quality 7  Additional requirement n° 3 The Draught Rate depends on: The air temperature The mean air velocity The turbolence intensity Category PPD % PD (DR)  In any case, for UNI 10339 A < 6% < 15% Standard It must be: B < 10% < 20% Tu,max va,max,winter ≤ 0.15 m/s C < 15% < 25% va,max,summer ≤ 0.25 m/s AY 2022/23 Energy performance design and indoor environmental quality 8  Local discomfort High vertical air Floor temperature Draught temperature difference High radiant temperature asymmetry AY 2022/23 Energy performance design and indoor environmental quality 9  Additional requirement n° 4 10°C winter 35°C summer In case of cool/warm wall risk, the plane radiant temperature asymmetry should be less than 5% 10 °C in winter and 23 °C in summer PD (Radiant Category PPD % asymmetry) A < 6% < 5% 23 B < 10% < 5% C < 15% < 10% AY 2022/23 Energy performance design and indoor environmental quality 10