P M V Subbarao Professor Mechanical Engineering Department I I T Delhi

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P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Multi Pass DPHX P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Understanding the Limits for Economics !!! Crazy Ideas May get Backfired!?!?!

Temperature Variations in Double Pass HX.

1-2 Shell with Better Flow Configuration

Modified Definitions for Library of Ideas TEMA : An authorized body for innovation & Standardization. Shell side fluid : 1 Tube side fluid : 2

TEMA – E : One parallel & One counter Tube Flows : Devided Shell Flow

TEMA 1-2 G Shell & Tube

TEMA 1-2 H Shell & Tube

TEMA 1-2 J Shell & Tube

dz

Modified Definitions

TEMA – E : One parallel & Two counter Tube Flows

TEMA – E : Two parallel & Two counter Tube Flows

TEMA 1-4 J Shell & Tube

Multiple Shell and Tube HXs

Multiple Shell and Tube HXs General accepted rule of thumb for heat exchanger design is to design such that F > 0.8. F increases with increasing number of multiple shells in series for constant values of Pi and Ri. The F equation for multiple shells can be used by redefining R and P as: where