Delta OHM HD32.3, Operating Manual

Page: 15 / 74

HD32.3
- 15 -
V1.4
Activity W/m
2
Jobs - Sport
Running
9 km/h 435
12 km/h 485
15 km/h 550
Skiing - in good snow plan
7 km/h 350
9 km/h 405
12 km/h 510
Ice Skating
12 km/h 225
15 km/h 285
18 km/h 360
Jobs – Home jobs
Different jobs
Cleaning 100 ÷ 200
Cooking 100 ÷ 200
Cleaning dishes, standing 145
Hand washing and ironing 120 ÷ 220
Shaving, washing and dressing 100
To calculate the Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD) it is
necessary that are connected the following probes:
•
TP3276.2 or TP3275 globe thermometer probe.
•
HP3217.2 or HP3217R combined probe for the measurement of relative humidity and
the air temperature.
•
AP3203.2 or AP3203 probe with warm wire for the measurement of the air speed.
To calculate the
Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD)
consider the regulations:
•
ISO 7726
•
ISO 7730:2005
2.1.3 Medium radiant temperature tr
The medium radiant temperature is defined as a temperature involving a fictitious thermal uniform
environment that would exchange with the beings the same thermal radiant power exchanged with
the real environment.
To check the medium radiant temperature we must detect:
the globe thermometer temperature,
air temperature and air speed measured close to the globe thermometer .
The formula for calculating the medium radiant temperature is the following one:
•
In case of natural convection :
( ) ( )
273
10 25 . 0
273
4 / 1
4 / 1
8
4 −
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
− ×
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−
×
+ + =
a g
a g
g
g r
t t
D
t t
t t
ε