Spiral Heat Exchanger

The video tutorial explains the design and function of a spiral heat exchanger, highlighting its components and fluid flow process. It contrasts this type with plate and tube heat exchangers, noting its single-channel design and high velocity, which reduces fouling. The video also discusses its application in aerobic digesters for methane production, emphasizing its suitability for processing sludge-like substances.

Why is this type of heat exchanger not as commonly used?

What is the purpose of releasing methane from the digester?