Frigicoll Kaysun KEM-90 DRS4, Engineering Data Book, Page: 19 / 29

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Other terms used in the literature to describe fouling include: deposit formation, encrustation, crudding, deposition, scaling,
scale formation, slagging, and sludge formation. The last six terms have a more narrow meaning than fouling within the scope
of the fouling science and technology, and they also have meanings outside of this scope; therefore, they should be used with
caution.
Fouling phenomena are common and diverse, ranging from fouling of ship hulls, natural surfaces in the marine environment
(marine fouling), fouling of heat-transfer components through ingredients contained in the cooling water or gases, and even
the development of plaque or calculus on teeth, or deposits on solar panels on Mars, among other examples.
Foreign matter in the chilled water system will adversely affect the heat transfer capability of the evaporator, and could increase
the pressure drop and reduce the water flow. To provide optimum unit operation, proper water treatment must be maintained.
Refer to the able as following.
ALTITUDE
(m)
Difference
of water
inlet and
outlet
temp. (⁰C)
Fouling Factor
0.018 m2. ⁰C /kW 0.044 m2. ⁰C /kW 0.086 m2. ⁰C /kW 0.172 m2. ⁰C /kW
C P C P C P C P
Sea level
3 1.036 1.077 1.019 1.076 0.991 0.975 0.963 0.983
4 1.039 1.101 1.022 1.080 0.994 0.996 0.971 0.984
5 1.045 1.105 1.028 1.086 1.000 1.000 0.977 0.989
6 1.051 1.109 1.034 1.093 1.006 1.004 0.983 0.994
600
3 1.024 1.087 1.008 1.064 0.980 0.984 0.951 0.991
4 1.027 1.111 1.011 1.068 0.983 1.005 0.959 0.992
5 1.034 1.115 1.017 1.074 0.989 1.009 0.965 0.997
6 1.043 1.115 1.026 1.084 0.998 1.009 0.973 0.999
1200
3 1.013 1.117 0.996 1.052 0.969 1.011 0.942 1.002
4 1.015 1.118 0.998 1.055 0.971 1.012 0.948 1.003
5 1.023 1.122 1.006 1.063 0.979 1.015 0.955 1.005
6 1.031 1.125 1.015 1.072 0.987 1.018 0.962 1.007
1800
3 1.002 1.128 0.986 1.042 0.959 1.021 0.935 1.007
4 1.005 1.129 0.989 1.045 0.962 1.022 0.941 1.010
5 1.012 1.132 0.995 1.051 0.968 1.024 0.945 1.012
6 1.018 1.134 1.001 1.058 0.974 1.026 0.949 1.014
Abbreviations:
C: Cooling capacity
P: Power input