Massachusetts Oil Burner License Practice Test

What is a consequence of scale buildup in a heat exchanger?

1. Increased efficiency

2. Decreased heat transfer

3. Lower energy consumption

4. Enhanced burner reliability

The correct answer is: Decreased heat transfer

Scale buildup in a heat exchanger has a significant impact on the system's performance, primarily leading to decreased heat transfer. The scale, which is often composed of mineral deposits, creates an insulating layer on the heat exchanger surfaces. This insulating effect reduces the surface area available for heat transfer between the fluids, making it less efficient for the heat exchanger to perform its intended function. As a result, the system may require more energy input to achieve the desired heating or cooling effects, leading to increased operational costs and energy consumption. Understanding the role of a heat exchanger and the mechanisms by which scale affects its efficiency is crucial for maintaining optimal performance within heating systems. Regular maintenance and monitoring can help prevent scale buildup, ensuring that heat exchangers operate effectively and efficiently.