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MCPE
T= 30
Coefficients DataSet1 DataSet2 DataSet3 DataSet6 DataSet7 DataSet13 DataSet14
Padddy, des Brown, des Paddy, ads Paddy, ads Paddy, des Paddy, ads Paddy, des
C1 1.1501E+03 1.05E+03 7.32E+02 3.13E+02 5.06E+02 5.55E+02 4.94E+02
C2 7.6595E+01 9.90E+01 9.0609E+05 2.2437E+01 1.73E+01 7.2170E+01 5.7373E+01
C3 2.5530E-01 1.90E-01 2.01E-01 2.34E-01 2.60E-01 1.69E-01 1.67E-01
Y-Axes X-Axes
DataSet1 DataSet2 DataSet3 DataSet6 DataSet7 DataSet13 DataSet14
MC MC RH RH RH RH RH RH RH
% w.b. % d.b. % % % % % % %
0.0 0.0 0 0 100 0 0 0 0
2.4 2.5 0 1 100 4 0 3 2
4.8 5.0 5 4 100 16 5 10 9
7.0 7.5 20 14 100 36 22 22 20
9.1 10.0 43 30 100 56 45 37 34
11.1 12.5 64 47 100 73 66 52 49
13.0 15.0 79 62 100 84 81 65 63
14.9 17.5 88 75 100 91 89 75 74
16.7 20.0 94 83 100 95 94 83 82
18.4 22.5 97 89 100 97 97 89 88
20.0 25.0 98 93 100 98 98 92 92
21.6 27.5 99 96 100 99 99 95 94
23.1 30.0 99 97 100 99 100 97 96
24.5 32.5 100 98 100 100 100 98 98
25.9 35.0 100 99 100 100 100 99 98
27.3 37.5 100 99 100 100 100 99 99
28.6 40.0 100 100 100 100 100 99 99
0 10 20 30 40 50 60 70 80 90 1000.0
5.0
10.0
15.0
20.0
25.0
30.0
Paddy desLinear (Paddy des)Brown Rice desLinear (Brown Rice des)
% Relative Humidity
Moi
stur
e Co
nten
t
Recommended RH of 60% or Water Activity of 0.6 ( required to con-trol fungi and bacteria growth)
Desorption
A plot of EMC (equilibrium moisture content) at a given temperature versus the relative humidity is termed as sorption isotherm.
Now I know that I can store my brown rice at a higher EMC
than paddy
0 20 40 60 80 100 1200.0
10.0
20.0
30.0
40.0
50.0
60.0
Paddy adsPaddy des
% Relative Humidity
Moi
stur
e Co
nten
t
The two isotherms are almost identical (most
drying materials display hysteresis in that the two
isotherms are not identical)
Now I know that paddy can absorb almost same
amount of water if exposed to higher RHs
Increase in T will leads to lower MC at the same RH and will reduce the difference bewteen des and ads
isotherms.
MCC
CT
CRH 3
2
1 expexp
29.8 42.5 100 100 100 100 100 100 100
31.0 45.0 100 100 100 100 100 100 100
32.2 47.5 100 100 100 100 100 100 100
33.3 50.0 100 100 100 100 100 100 100
0 20 40 60 80 100 1200.0
10.0
20.0
30.0
40.0
50.0
60.0
Paddy adsPaddy des
% Relative Humidity
Moi
stur
e Co
nten
t
Now I know that paddy can absorb almost same
amount of water if exposed to higher RHs
0 10 20 30 40 50 60 70 80 90 1000.0
5.0
10.0
15.0
20.0
25.0
30.0
Paddy desLinear (Paddy des)Brown Rice desLinear (Brown Rice des)
% Relative Humidity
Moi
stur
e Co
nten
t
Recommended RH of 60% or Water Activity of 0.6 ( required to con-trol fungi and bacteria growth)
Desorption
0 20 40 60 80 100 1200.0
10.0
20.0
30.0
40.0
50.0
60.0
Paddy adsPaddy des
% Relative Humidity
Moi
stur
e Co
nten
t
The two isotherms are almost identical (most
drying materials display hysteresis in that the two
isotherms are not identical)
0 20 40 60 80 100 1200.0
10.0
20.0
30.0
40.0
50.0
60.0
Paddy adsPaddy des
% Relative Humidity
Moi
stur
e Co
nten
t
