The demand for steam on large processing sites fluctuates significantly with the process, the time of day or week and with the seasons. The uneven demand for steam has led to inefficiency in boiler operation through continuous running of large feed water pumps.
A boiler control system from Bestobell Service offers savings in energy costs for steam boilers. In long term trials, using a variable speed drive for direct control of the pump, the feed water control system reduces running costs by 30% when compared to the inefficiencies of the traditional modulating feed valve.
The old modulating feed valve was used to regulate the amount of water entering the boiler, resulting in large amounts of wasted energy when pump and valve were working against each other. The control system avoids this waste through direct control of the pump to regulate feed water. The resulting system is said to be more efficient and cheaper to run.
The system works when level monitoring sensors inside the boiler indicate when more feed water is required. The system varies the pump speed to maintain the correct level of water in the boiler, keeping drive speed to the minimum required to meet the demand. As a result the pump is rarely working to full capacity and energy and cost savings are apparent.
The system can be fitted to most steam boilers that incorporate any make or type of modulating feed valve even after installation.
Meggitt Mowbrey Tel: 01753 534646