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Direct or Indirect Cooling: Which Technology is More Efficient for Bulk Solids Cooling?

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.

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