Energy saving Tip No- 6 (maximize condensate return to Boiler)
Tip summary :
Investigate potential areas for condensate return Condensate is the condensed water that has dropped out of the steam system as it loses energy through the distribution system. This water is then drained by steam traps.
In the majority of cases, this condensate is returned to a receiver, where the water is pumped to the boiler feed-water system and recirculated through the steam system.
The advantages of returning this water are:
- Less energy is required to heat the feed-water as the condensate is still at a relatively high temperature.
- Less water is drawn from the main supply and so you save water.
Effort, energy and money have already been invested in treating the feed-water that is no longer lost.
- Maximizing the percentage of your condensate returned to your boiler will raise your energy
Unavoidable losses exist in certain steam applications, such as sparging steam into a tank and direct heating of process streams with steam.
Opportunities for increasing your condensate return should be identified, including:
- Running return lines to distant parts of the system.
- Ensuring the size of condensate return piping is sufficient for changing plant heat loads
- Identifying and fixing leaks in the condensate return system.
- Insulating the condensate return lines.
the expected savings are about 3% of the overall total system energy with related reduction in CO2 emissions.