DIRECT or INDIRECT COOLING:WHICH TECHNOLOGY IS MORE EFFICIENT FOR BULK SOLIDS COOLING?

摘要

Bulk solids cooling is a common step in many chemical processes. It generally occurs near the end of the processing sequence when powders or bulk solids must be cooled prior to storage or packaging to allow for safe handling and storage. Most engineers would agree that direct cooling appears to be more efficient than indirect cooling, and from a purely technical standpoint, it is. Cooling a bulk solid by passing cool air through it brings the cooling medium and the product into direct contact. While this would appear to be the most efficient approach, when it comes to bulk solids cooling, a counter-intuitive approach is required to maximize efficiency.