DeltaOHM HD32.1, Руководство по эксплуатации

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HD32.1
- 13 -
V2.1
2.2 T
HE
O
PERATING
P
ROGRAM
B: DISCOMFORT ANALYSIS
The HD32.1, Thermal Microclimate, through its operating program B: Discomfort Analysis,
measures the following quantities.
•
t
h
head temperature: air temperature detected at head height
•
t
b
: body temperature: air temperature detected at abdomen height
•
t
k
: ankle temperature: air temperature detected at ankle height
•
t
f
: floor temperature: air temperature at floor level
•
P : net radiation: net radiation, measured in Wm
-2
.
By knowing the temperatures at head t
h
, abdomen t
b
, ankles t
k
and floor t
f
height, you can
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
v
,
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
v
index (unsatisfied with the vertical difference of temperature)
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
v
index is calculated by the DeltaLog10 software.
In order to calculate the PD
v
index (unsatisfied with the vertical difference of temperature)
you should refer to the following regulations:
•
ISO 7730