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   Trane Company (The)  Air Cooled Liquid Chillers  

Air Cooled Liquid Chillers - Page 15

 

 

Performance Adjustment Factors

 

GLYCOL AND PERFORMANCE ADJUSTMENT FACTORS

Table 16-1 — Glycol Adjustment Factor for CGA — 10 and 15 Ton Units Only

Leaving Solution Temp. 0 % 10 % 20 % 30 % 40 % 50 %
Freezing Point = 32º F Freezing Point = 25º F Freezing Point = 16ºF Freezing Point = 4º F Freezing Point = -11ºF Freezing Point = - 32º F
CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW
20°F 1.06 0.97 1.04 1.01 0.97 1.01 1.01 0.98 1.01 1.00 1.00 1.00 0.99 1.05 1.00 0.98 1.10 0.99
30°F 1.04 0.98 1.02 1.01 0.99 1.00 1.00 1.00 1.00 0.99 1.02 0.99 0.98 1.07 0.99 0.97 1.12 0.98
35°F 1.03 0.98 1.01 1.00 0.99 1.00 1.00 1.01 0.99 0.99 1.03 0.99 0.98 1.07 0.98 0.97 1.12 0.98
40°F 1.00 1.00 1.00 0.98 1.00 0.99 0.98 1.03 0.98 0.97 1.06 0.98 0.96 1.11 0.98 0.95 1.15 0.97
45°F 1.00 1.00 1.00 0.99 1.01 0.99 0.98 1.03 0.99 0.98 1.07 0.98 0.97 1.11 0.98 0.96 1.16 0.97
50°F 1.00 1.00 1.00 0.99 1.01 0.99 0.99 1.04 0.99 0.98 1.07 0.98 0.97 1.11 0.98 0.96 1.16 0.97
60°F 1.00 1.00 1.00 1.00 1.02 1.00 0.99 1.04 1.00 0.98 1.07 0.99 0.98 1.11 0.99 0.97 1.16 0.98

Table 16-2 — Glycol Adjustment Factor for CGA — 20 - 60 Ton Units Only

Leaving Solution Temp. 0 % 10 % 20 % 30 % 40 % 50 %
Freezing Point = 32º F Freezing Point = 24º F Freezing Point = 15ºF Freezing Point=54º F

Freezing Point=-12ºF

 Freezing Point= -33º F
CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW CAP GPM KW
20°F — — — — — — — — — .998 1.008 1.000 .985 1.050 .997 .971 1.098 .995
25°F — — — — — — — — — .993 1.022 .999 .981 1.064 .996 .968 1.111 .994
30°F — — — — — — .999 1.003 1.000 .989 1.037 .998 .977 1.078 .995 .964 1.125 .993
35°F — — — — — — .995 1.016 .999 .985 1.049 1.009 .973 1.090 .994 .962 1.137 .992
40°F 1.000 1.000 1.000 .956 .974 .984 .949 1.000 .984 .943 1.034 .984 .937 1.077 .984 .930 1.124 .979
45°F 1.000 1.000 1.000 .965 .981 .990 .959 1.005 .990 .953 1.039 .985 .947 1.080 .985 .936 1.129 .979
50°F 1.000 1.000 1.000 .962 .982 .990 .957 1.007 .990 .951 1.038 .990 .946 1.079 .990 .935 1.124 .985

Notes:

1. Use this table with the capacity table to correct performance for ethylene glycol concentrations other than those listed.

2. Flow rate (GPM) correction factor required to maintain a 10°F delta T.

3. Shaded area may result in freezing.

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