🔍 Key Concepts

• Shell-and-tube heat exchanger flow patterns • How temperature profiles look for counterflow vs parallel flow • Meaning of temperature differential between hot and cold fluids

💭 Think About

• Sketch or imagine temperature vs. length diagrams for each flow type and see where the greatest temperature difference can be maintained along the length • Think about which arrangement keeps the hot fluid in contact with the coldest cooling medium for the longest distance • Compare how quickly the temperature difference drops along the exchanger for each flow pattern

✅ Before You Answer

• Be clear on the direction of flow for parallel vs counter arrangements • Recall which design is typically used when maximum heat transfer efficiency is desired • Eliminate any options that are not standard primary flow arrangements in typical shell-and-tube designs