Temperature Correction

Temperature Correction

Performance of the reverse osmosis membrane element is affected by two key factors; temperature of the feed water and the net driving pressure across the element. These two factors must be taken into account before comparing or evaluating the performance of a membrane element or a reverse osmosis system.

The following information is provided to assist you in roughly calculating the affects of the temperature factor. For information on pressure correction, please click here.

The water temperature is one of the key factors in the performance of the reverse osmosis membrane element. The higher the temperature, the higher the product flow and vice versa. All reverse osmosis membrane elements and systems are rated at 77º Fahrenheit (25ºCelsius). To find the membrane permeate rate at a different temperature, follow these steps:

  1. Find the temperature correction factor (TCF) from the table below
  2. Divide the rated permeate flow at 77 degrees Fahrenheit by the temperature correction factor
  3. The result is the permeate flow at the desired temperature

Temperature
°F (°C)
Temperature
Correction
Factor
Temperature
°F (°C)
Temperature
Correction
Factor
Temperature
°F (°C)
Temperature
Correction
Factor
Temperature
°F (°C)
Temperature
Correction
Factor
50.0 / 10.0 1.711 59.0 / 15.0 1.422 68.0 / 20.0 1.189 77.0 / 25.0 1.000
50.2 / 10.1 1.705 59.0 / 15.1 1.417 68.2 / 20.1 1.185 77.2 / 25.1 0.997
50.4 / 10.2 1.698 59.4 / 15.2 1.411 68.4 / 20.2 1.180 77.4 / 25.2 0.994
50.5 / 10.3 1.692 59.5 / 15. 1.406 68.5 / 20.3 1.176 77.5 / 25.3 0.991
50.7 / 10.4 1.686 59.7 / 15.4 1.401 58.7 / 20.4 1.172 77.7 / 25.4 0.988
50.9 / 10.5 1.679 59.9 / 15.5 1.396 68.9 / 20.5 1.168 77.9 / 25.5 0.985
51.1 / 10.6 1.673 60.1 / 15.6 1.391 69.1 / 20.6 1.164 78.1 / 25.6 0.982
51.3 / 10.7 1.667 60.3 / 15.7 1.386 39.3 / 20.7 1.160 78.3 / 25.6 0.979
51.4 / 10.8 1.660 60.4 / 15.8 1.381 69.4 / 20.8 1.156 78.4 / 25.8 0.977
51.6 / 10.9 1.654 60.6 / 15.9 1.376 69.6 / 20.9 1.152 78.6 / 25.9 0.974
51.8 / 11.0 1.648 60.8 / 16.0 1.371 69.8 / 21.0 1.148 78.8 / 26.0 0.971
52.0 / 11.1 1.642 61.0 / 16.1 1.366 70.0 / 21.1 1.144 79.0 / 26.1 0.968
52.2 / 11.2 1.636 61.2 / 16.2 1.361 70.2 / 21.2 1.140 79.2 / 26.2 0.965
52.3 / 11.3 1.630 61.3 / 16.3 1.356 70.3 / 21.3 1.136 79.3 / 26.3 0.962
52.5 / 11.4 1.624 61.5 / 16.4 1.351 70.5 / 21.4 1.132 79.5 / 26.4 0.959
52.7 / 11.5 1.618 61.7 / 16.5 1.347 70.7 / 21.5 1.128 79.7 / 26.5 0.957
52.9 / 11.6 1.611 61.9 / 16.6 1.342 70.9 / 21.6 1.124 79.9 / 26.6 0.954
53.1 / 11.7 1.605 62.1 / 16.7 1.337 71.1 / 21.7 1.120 80.1 / 26.7 0.951
53.2 / 11.8 1.600 62.2 / 16.8 1.332 71.2 / 21.8 1.116 80.2 / 26.8 0.948
53.4 / 11.9 1.594 62.4 / 16.9 1.327 71.4 / 21.9 1.112 80.4 / 26.9 0.945
53.6 / 12.0 1.588 62.6 / 17.0 1.323 71.6 / 22.0 1.109 80.6 / 27.0 0.943
53.8 / 12.1 1.582 62.8 / 17.1 1.318 71.8 / 22.1 1.105 80.8 / 27.1 0.940
54.0 / 12.2 1.576 63.0 / 17.2 1.313 72.0 / 22.2 1.101 81.0 / 27.0 0.937
54.1 / 12.3 1.570 63.1 / 17.3 1.308 72.1 / 22.3 1.097 81.1 / 27.3 0.934
54.3 / 12.4 1.564 63.3 / 17.4 1.304 72.3 / 22.4 1.093 81.3 / 27.4 0.932
54.5 / 12.5 1.558 63.5 / 17.5 1.299 72.5 / 22.5 1.090 81.5 / 27.5 0.929
54.7 / 12.6 1.553 63.7 / 17.6 1.294 72.7 / 22.6 1.086 81.7 / 27.6 0.926
54.9 / 12.7 1.547 63.9 / 17.7 1.290 72.9 / 22.7 1.082 81.9 / 27.7 0.924
55.0 / 12.8 1.541 64.0 / 17.8 1.285 73.0 / 22.8 1.078 82.0 / 27.8 0.921
55.2 / 12.9 1.536 64.2 / 17.9 1.281 73.2 / 22.9 1.075 82.2 / 27.9 0.918
55.4 / 13.0 1.530 64.4 / 18.0 1.276 73.4 / 23.0 1.071 82.4 / 28.0 0.915
55.6 / 13.1 1.524 64.6 / 18.1 1.272 73.6 / 23.1 1.067 82.6 / 28.1 0.913
55.8 / 13.2 1.519 64.8 / 18.2 1.267 73.8 / 23.2 1.064 82.8 / 28.2 0.910
55.9 / 13.3 1.513 64.9 / 18.3 1.262 73.9 / 23.3 1.060 82.9 / 28.3 0.908
56.1 / 13.4 1.508 65.1 / 18.4 1.258 74.1 / 234 1.056 83.1 / 28.4 0.905
56.3 / 13.5 1.502 65.3 / 18.5 1.254 74.3 / 23.5 1.053 83.3 / 28.5 0.902
56.5 / 13.6 1.496 65.5 / 18.6 1.249 74.5 / 23.6 1.049 83.5 / 28.6 0.900
56.7 / 13.7 1.491 65.7 / 18.7 1.245 74.7 / 23.7 1.045 83.7 / 28.7 0.897
56.8 / 13.8 1.486 65.8 / 18.8 1.240 74.8 / 23.8 1.042 83.8 / 28.8 0.894
57.0 / 13.9 1.480 66.0 / 18.9 1.236 75.0 / 23.9 1.038 84.0 / 28.9 0.892
57.2 / 14.0 1.475 66.2 / 19.0 1.232 75.2 / 24.0 1.035 84.2 / 29.0 0.889
57.4 / 14.1 1.469 66.4 / 19.1 1.227 75.4 / 24.1 1.031 84.4 / 29.1 0.887
57.6 / 14.2 1.464 66.6 / 19.2 1.223 75.6 / 24.2 1.028 84.6 / 29.2 0.884
57.7 / 14.3 1.459 66.7 / 19.3 1.219 75.7 / 24.3 1.024 84.7 / 29.3 0.882
57.9 / 14.4 1.453 66.9 / 19.4 1.214 75.9 / 24.4 1.021 84.9 / 29.4 0.879
58.1 / 14.5 1.448 67.1 / 19.5 1.210 76.1 / 24.5 1.017 85.1 / 29.5 0.877
58.3 / 14.6 1.443 67.3 / 19.6 1.206 76.3 / 24.6 1.014 85.3 / 29.6 0.874
58.5 / 14.7 1.437 67.5 / 19.7 1.201 76.5 / 24.7 1.010 85.5 / 29.7 0.871
58.6 / 14.8 1.432 67.6 / 19.8 1.197 76.6 / 24.8 1.007 85.6 / 29.8 0.869
58.8 / 14.9 1.427 67.8 / 19.9 1.193 76.8 / 24.9 1.003 85.8 / 29.9 0.866