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2.2 T
O
HE
PERATING
The HD32.1, Thermal Microclimate, through its operating program B: Discomfort Analysis,
measures the following quantities.
• t
head temperature:
h
• t
:
body temperature: air temperature detected at abdomen height
b
• t
:
ankle temperature: air temperature detected at ankle height
k
• t
:
floor temperature: air temperature at floor level
f
• P :
net radiation:
By knowing the temperatures at head t
determine, according to ISO 7730 , the following local thermal discomfort indexes:
• Unsatisfied with the vertical difference of temperature;
• Unsatisfied with the floor temperature;
• Unsatisfied with the radiant asymmetry.
2.2.1 Unsatisfied with the vertical difference of temperature
By detecting the temperatures at various heights you can check the presence of a air temperature
vertical gradient. This gradient could cause a local discomfort feeling. In the following figure you
can see the percentage value of the unsatisfied with the vertical difference of temperature PD
according to the temperature gradient between head (1.10 m) and ankles (0.10 m) for a seated
person. This index is calculated using the DeltaLog10 software.
In order to calculate the PD
you have to connect the following probes:
•
Probe for the air temperature detected at head height
•
Probe for the air temperature detected at ankle height
The PD
index is calculated by the DeltaLog10 software.
v
In order to calculate the PD
you should refer to the following regulations:
•
ISO 7730
HD32.1
P
B: DISCOMFORT ANALYSIS
ROGRAM
air temperature detected at head height
net radiation, measured in Wm
h
index (unsatisfied with the vertical difference of temperature)
v
index (unsatisfied with the vertical difference of temperature)
v
, abdomen t
, ankles t
b
- 13 -
-2
.
and floor t
height, you can
k
f
,
v
V2.1
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