Many facilities are replacing their steam boiler with a hydronic one to increase efficiency and decrease system operating cost. Before condensing boiler technology was introduced, boilers operated at a maximum of 80% to 85% efficiency.
To ensure a boiler runs properly over the course of its lifetime, treating the water that circulates within the system is mandatory. If the water is not treated properly, the boiler will begin to have problems within the first year, and its useful life will be significantly shortened. Boiler symptoms resulting from untreated water include overheating, failure to produce hot water or steam, a drop in the boiler flow rate and an overall loss of efficiency.
Proper arrangement of drum baffling, sizing and location of dowcomers and risers will ensure a good natural-circulation system.
There are common misconceptions among engineers when evaluating fins regarding surface area. This article highlights the importance of selecting proper fin geometry for heat transfer equipment and the implications of poor fin selection.