Heat Transfer

The Heat Transfer calculator computes the overall heat transfer flow rate through a medium, such as a heat exchanger, based on the heat transfer material coefficient, transfer area and the temperature difference.

INSTRUCTIONS: Choose units and enter the following:

• (U) Heat Transfer Coefficient. units: W/(m²⋅°C)
• (A) Surface Area
• (ΔT) Difference in Temperature

Heat Transfer Flow Rate (Q): The energy flow rate is returned in watts (W).  However, this can be automatically converted to compatible units via the pull-down menu.

The Math / Science

Heat Transfer Flow Rate is defined as the transfer of heat by convection or in the phase change (generally between fluid and a solid) across a medium.  The formula for Heat Transfer Flow Rate is:

`Q = U*A*ΔT`

Where,

• Q = Heat Energy Flow Rate, J/s = W
• U = Heat transfer coefficient, W/(m^2⋅C)
• A = Heat Transfer Surface Area, m²
• ΔT = Difference in Temperature between the solid surface and surrounding fluid area

Heat Transfer Calculators

• Arithmetic Mean Temperature Difference (AMTD)
• Logarithmic Mean Temperature Difference (LMTD)
• Conductive Heat Transfer
• Thermal Diffusivity
• Heat Transfer Coefficient
• Heat Energy Transfer Rate
• Heat Transfer using LMTD
• Heat Exchange Area using LMTD