211
The thermal comfort indexes calculation had refl ected these considerations:
PMV and PET had indicated a slightly warm environment at outer positions while
on the green there was a neutral situation.
It is interesting to compare Pos. 4 and 5: the fi rst was on the grass, the second was
on a dirt patch near a fountain. Even so, same air temperature (27 °C) was measured
at these locations. This was mainly due to the lower T mr for Pos. 4 and to the evaporative cooling effect for Pos. 5.
Table 7.6 Data obtained in measurement sessions in Prato della Valle (dimension of ellipse are
180 × 230 m) (see also Fig. 7.1 ). Thermal comfort indexes refer to a person with summer clothing
(0.5 clo) and slight activity level (80 W above the basal metabolism) (Google Earth)
Prato della Valle
Pos.1
Pos.2
Pos.3
Pos.4
Pos.5
Pos.6
Date
2-Aug
2-Aug
2-Aug
2-Aug
2-Aug
2-Aug
Hour
21:53
22:03
22:14
22:25
22:35
22:44
Temperature (°C)
28.4
28.4
28.1
27.0
26.9
27.4
UHI Intensity (°C)
3.2
3.9
4.3
3.8
3.7
4.7
Relative humidity (%)
48.0
48.2
49.1
52.9
53.5
51.5
Humidity ratio (g v kg a
−1
)
11.6
11.7
11.7
11.8
11.8
11.7
Wind velocity (m s
−1
)
0.8
0.8
0.8
0.8
0.7
0.7
T globe (°C)
27.8
28.1
27.2
24.8
25.3
26.5
T radiant mean (°C)
26.5
27.4
25.2
20.1
22.2
24.8
PMV
0.8
0.8
0.6
0.0
0.1
0.5
PET (°C)
26.1
26.5
25.3
22.5
23.3
24.7
SET* (°C)
20.1
20.5
19.3
16.5
17.6
19.0
7 The Urban Corridor of Venice and The Case of Padua
The thermal comfort indexes calculation had refl ected these considerations:
PMV and PET had indicated a slightly warm environment at outer positions while
on the green there was a neutral situation.
It is interesting to compare Pos. 4 and 5: the fi rst was on the grass, the second was
on a dirt patch near a fountain. Even so, same air temperature (27 °C) was measured
at these locations. This was mainly due to the lower T mr for Pos. 4 and to the evaporative cooling effect for Pos. 5.
Table 7.6 Data obtained in measurement sessions in Prato della Valle (dimension of ellipse are
180 × 230 m) (see also Fig. 7.1 ). Thermal comfort indexes refer to a person with summer clothing
(0.5 clo) and slight activity level (80 W above the basal metabolism) (Google Earth)
Prato della Valle
Pos.1
Pos.2
Pos.3
Pos.4
Pos.5
Pos.6
Date
2-Aug
2-Aug
2-Aug
2-Aug
2-Aug
2-Aug
Hour
21:53
22:03
22:14
22:25
22:35
22:44
Temperature (°C)
28.4
28.4
28.1
27.0
26.9
27.4
UHI Intensity (°C)
3.2
3.9
4.3
3.8
3.7
4.7
Relative humidity (%)
48.0
48.2
49.1
52.9
53.5
51.5
Humidity ratio (g v kg a
−1
)
11.6
11.7
11.7
11.8
11.8
11.7
Wind velocity (m s
−1
)
0.8
0.8
0.8
0.8
0.7
0.7
T globe (°C)
27.8
28.1
27.2
24.8
25.3
26.5
T radiant mean (°C)
26.5
27.4
25.2
20.1
22.2
24.8
PMV
0.8
0.8
0.6
0.0
0.1
0.5
PET (°C)
26.1
26.5
25.3
22.5
23.3
24.7
SET* (°C)
20.1
20.5
19.3
16.5
17.6
19.0
7 The Urban Corridor of Venice and The Case of Padua