Frost Protection - UTL Repository

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F R O S T P R O T E C T I O N : F U N D A M E N T A L S , P R A C T I C E A N D E C O N O M I C S
FIGURE 7.7
A schematic diagram that shows the effect of wind machines on the
temperature profile during a radiation frost
H E I G H T ( m )
20
15
10
5
0
12
NO WIND MACHINES
-5 0 5 10
TEMPERATURE (° C)
FIGURE 7.8
10 m w/o fan
H E I G H T ( m )
20
15
10
5
0
WITH WIND MACHINES
-5 0 5 10
TEMPERATURE (° C)
Traces of 10 m and 2 m temperature trends without (w/o) a fan and 2 m
temperature trends measured near wind machines started at 0145 and 0315 h
February 3-4, 1993
[
T E M P E R A T U R E ( ° C )
10
8
6
4
2
01.45
03.15
2 m w/o fan
0
22.00
23.00
00.00
01.00
02.00
03.00
04.00
05.00
06.00
07.00
08.00
P A C I F I C S T A N D A R D T I M E
Temperature measurements were collected 30 m away from the wind machine
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