Environmental Engineering Reference

In-Depth Information

Table 24. VxT interaction mean values

Sensible Heat (W)

Mean

Value

Factors

Mean Value

Factors

Mean Value

Factors

V1T5

-18.13

V2T5

-23.36

V3T5

-51.73

V1T6

-38.99

V2T6

-66.24

V3T6

-88.55

V1T7

-51.18

V2T7

-104.19

V3T7

-109.67

V1T8

-100.26

V2T8

-143.52

V3T8

-133.08

V1T9

-152.08

V2T9

-162.14

V3T9

-154.25

Table 25. ANOVA

Factors DoF

SS

V

%

V

2

234869.36

117434.68

10.38

T

8

1676654.00 209581.75 74.10

VxT

16

351256.57

21953.54

15.52

Error

0

0.0

0.0

0.00

Total

26

2262779.9

87029.99

100.00

Table 26. ANOVA (heating and cooling mode)

Heati
n
g Mode

Cooli
ng Mode

Factors DoF %

DoF
%

V

2

10.77

2

39.66

T

3

56.58

4

26.23

VxT

6

32.65

8

34.11

Error

0

0.00

0

0.00

Total

11

100.00

14

100.00

Analysis of Results

All the factors and interaction with a percentage of contribution in the ANOVA higher

than 15% are considered.

Air Flow

•

Cooling Mode
: This factor presents the highest contributory percentage (39%). A

priori, it is thought that when the airflow rises the latent heat recovered also does,

due to the increase in the mass heat coefficient, nevertheless, the convective mass

diffusion does not limit mass transport, thus it cannot be considered the controlling

resistance. It was observed that when increasing the airflow above 400 m3/h, the

humidity addition lowers (in absolute terms), this means that this airflow value can

be considered as a maximum, reaching this value the system behaves as a current