Presentation on theme: "Miloslav V. Jokl, Zdeněk Jirák, Stanislav Malý, Daniel Šebesta, L. Vajner, Š. Bernatíková, L. Kilián, H. Lehocká, H. Tomášková 1."— Presentation transcript:
Miloslav V. Jokl, Zdeněk Jirák, Stanislav Malý, Daniel Šebesta, L. Vajner, Š. Bernatíková, L. Kilián, H. Lehocká, H. Tomášková 1
RTA by EN ISO 7730: INTRODUCTION
4 4 Globe stereothermometer scheme.
5 5 Measurements in climatic chamber. Legend: 1. vertical warm radiant panel, 2. vertical cool radiant panel, 3. radiant temperature, 4. stereothermometer, 5. air velocity, 6. globe thermometer Vernon-Jokl, 7. direction of air flow, 8. ceiling radiant panel, 9. control room window, 10. entrance. -globe temperature was kept constant 24 °C -the temperatures of the vertical surfaces was chosen 14, 19, 24, 29, 34 a 44 °C -the temperatures of the horizontal surfaces 45, 53 a 58 °C -air velocity was chosen 0.25 m/s, 0.5 m/s and 1.0 m/s -RTA, t rA, t rB, air velocity were measured by Indoor Climate Analyzer -The stereotemp. and globe temp. were measured by stereothermometer
6 6 Relationship RTA=t rA -t rB =f(t stereo -t g ) from measurement. RTA = t rA -t rB = (t stereo -t g ) – [°C] Relationship t rA =f(t stereo ) for various v from measurement. t rA =3.4153t stereo [°C] pro v=0.25m/s t rA = 4.14 t stereo [°C] pro v=0.5m/s t rA = 5.46 t stereo [°C] pro v=1.0 m/s