Agriculture Reference
In-Depth Information
(a)
200
(b)
1000
160
800
18°C
120
600
16°C
400
80
14°C
40
200
12°C
10°C
0
1
3
456789101112
0
5
10
15
20
Month
T (°C)
14
25
20
15
10
5
0
100
200
300
400
500
600
700
800
Incident global radiation (W m
-2
)
Sidewall: 11%
Sidewall: 22%
Roof: 13%
Sidewall: 11%, roof: 13%
Plate 13.
(a) Monthly energy consumption (Q, in MJ m
-2
) for different temperature set points (T
c
) in a low-cost
greenhouse in Almeria. (b) Yearly accumulated energy consumption (Q
s
, in MJ m
-2
) for different temperature set
points (T
c
). Data refer to an average year using hot-air heating (adapted from López, 2003).
Plate 14.
Increases in the air temperature of a greenhouse with respect to the outside air, depending on the inci-
dent global radiation for different ventilation conditions. Key shows location and percentage of ventilation area
(source: J.I. Montero).
