CLIVET WSAN-EE 21 - Page 51

M02R40C8-00 29/07/08 page 51
CORRECTION FACTOR FOR ANTIFREEZE SOLUTIONS
% ethylene glycol by weight 5% 10% 15% 20% 25% 30% 35% 40%
Freezing temperature °C -2.0 -3.9 -6.5 -8.9 -11.8 -15.6 -19.0 -23.4
Safety temperature °C 3.0 1.0 -1.0 -4.0 -6.0 -10.0 -14.0 -19.0
Cooling Capacity Factor Nr 0.995 0.990 0.985 0.981 0.977 0.974 0.971 0.968
Compressor input Factor Nr 0.997 0.993 0.990 0.988 0.986 0.984 0.982 0.981
Internal exchanger Glycol solution flow Factor Nr 1.003 1.010 1.020 1.033 1.050 1.072 1.095 1.124
Pressure drop Factor Nr 1.029 1.060 1.090 1.118 1.149 1.182 1.211 1.243
The correction factors shown refer to water and glycol ethylene mixes used to prevent the formation of frost on the exchangers in the water circuit during inactivity in winter.
FOULING CORRECTION FACTOR
INTERNAL EXCHANGER
m² °C/W F1 FK1
0.44 x 10^(-4) 1.00 1.00
0.44 x 10^(-4) 1.00 1.00
0.88 x 10^(-4) 0.97 0.99
The cooling performance values provided in the tables are based on the external exchanger having clean plates (fouling factor 1). For different fouling factor values, multiply the
performance by the coefficients shown in the table.
F1 = Cooling capacity correction factors
FK1 = Compressor power input correction factor
SOUND LEVELS
Sound Power Level (dB)
Octave band (Hz)
Sound
pressure
Sound
power
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
17
67 68 62 61 55 50 39 29 49 61
21
69 68 62 61 57 51 42 36 49 62
25
72 70 65 63 58 54 47 39 51 64
31
73 70 67 64 63 57 49 46 53 67
41
74 71 68 65 64 58 50 46 53 68
51
75 70 68 67 65 59 52 46 55 69
61
86 81 80 72 72 65 56 49 62 77
71
86 81 80 73 72 65 57 49 62 77
81
86 81 81 76 72 66 57 50 63 78
91
86 81 81 75 71 66 58 51 63 78
101
86 84 77 75 73 69 62 56 63 78
121
87 83 82 77 74 68 62 55 64 80
131
87 81 86 77 74 69 59 52 65 81
151
84 81 88 79 72 69 55 48 66 82
Measures according to ISO 3744 regulations, with respect to the
EUROVENT 8/1 certification.
The sound pressure is measured at 1 m from the external surface of the
unit in open field conditions.
data referred to the following conditions :
Internal exchanger water = 12/7°C; outdoor air temperature 35°C