Approach temp. 1 year after installed sytem
The chiller approach temperature is the best day-to-day indicator of how clean your condenser tubes are. This table compares the monthly approach temperatures of a Bangkok chiller plant before and after installing Elgressy EST.
Approach temperature, 2013 vs 2014 (°C)
| Month | CH-1 2013 | CH-1 2014 | CH-4 2013 | CH-4 2014 |
|---|---|---|---|---|
| May | 2.8 | 1.7 | 1.7 | 0.8 |
| June | 2.3 | 1.5 | 1.5 | 0.8 |
| July | 2.3 | 1.6 | 1.8 | 0.9 |
| August | 2.7 | 1.1 | 1.8 | 1.0 |
| September | 2.8 | 1.6 | 1.4 | 1.2 |
| October | 2.8 | 1.6 | 1.6 | 1.3 |
On chiller 1 the approach fell from 2.3 to 2.8 °C in mid-2013 to 1.1 to 1.7 °C in the same months of 2014. Chiller 4 improved in the same way. A lower approach means cleaner tubes, better heat transfer and lower compressor energy.
See what this means in money: energy cost savings one year after installing EST.
How EST works: Elgressy EST treats a side stream of the cooling water by controlled electrolysis. Calcium hardness precipitates as solid scale inside the EST reactors and is removed, instead of depositing on chiller condensers, heat exchangers and pipes. Oxidizing species formed at the anode help control algae and biofilm, so no anti-scalants or corrosion inhibitors are needed. Read more about Elgressy EST.
Related
- How to prevent rising chiller approach temperature
- Case study: EST at United Nations Bangkok
- All our installations in Southeast Asia
Want similar results at your site?
Water Treatment Asia (Aerial Lift Asia Co., Ltd.) has been the exclusive Elgressy distributor in Southeast Asia since 2010. Contact us for a free water analysis, a savings estimate and a visit to one of our reference sites.
Original data table
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