How does scaling impact boiler performance?

Scaling negatively impacts boiler performance primarily by impeding heat transfer. When scale builds up on the heating surfaces of a boiler, it acts as an insulator, which reduces the efficiency of heat exchange between the combustion gases and the water. The presence of scale leads to decreased thermal conductivity, meaning that the boiler has to work harder to achieve the desired temperature and pressure. This inefficiency can result in overheating of the boiler components, as the temperature control system may not adequately respond to the increased thermal resistance. Consequently, this can lead to potential damage, increased fuel consumption, and higher operational costs. Therefore, understanding the implications of scaling is crucial for maintaining optimal boiler operation and efficiency.