Heat Exchanger Calculator
Calculate heat transfer rate, LMTD, and surface area for shell and tube heat exchangers
About this calculator
This heat exchanger calculator helps engineers design and analyze shell and tube heat exchangers by calculating three critical parameters: heat transfer rate, logarithmic mean temperature difference (LMTD), and required surface area. It streamlines complex thermal calculations, enabling quick sizing and performance evaluation of heat exchangers. Essential for HVAC, chemical processing, and industrial applications where efficient heat transfer design is crucial for energy optimization and cost-effective operation.
How to use
Input the hot and cold fluid inlet/outlet temperatures, flow rates, and fluid properties into the calculator. The tool will automatically compute the heat transfer rate using energy balance equations, calculate LMTD for temperature driving force, and determine the required heat transfer surface area based on overall heat transfer coefficient.
Frequently asked questions
What is LMTD and why is it important?
LMTD (Logarithmic Mean Temperature Difference) represents the effective temperature driving force for heat transfer, accounting for temperature variations along the heat exchanger length.
How do I determine the overall heat transfer coefficient?
The overall heat transfer coefficient depends on fluid properties, flow conditions, fouling factors, and tube material. Use empirical correlations or manufacturer data.
Can this calculator handle different flow arrangements?
Yes, the calculator can account for parallel flow, counterflow, and crossflow configurations by applying appropriate correction factors to the LMTD.