Heat Exchanger Thermal Calculations

AI Thread Summary
Heat exchangers require a comprehensive understanding beyond just formulas, particularly focusing on the two fluids involved. The primary equation for heat balance in a condenser involves equating the heat added to water with the heat rejected by steam. The formula is expressed as Qadded = Qrej, where Qadded equals the mass flow rate of water multiplied by its specific heat and temperature difference, and Qrej involves the mass flow rate of steam and its enthalpy. This approach emphasizes the importance of heat balance for effective thermal calculations in heat exchangers. Understanding these principles is crucial for accurate thermal analysis.
elec2050
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Hello,
Can anyone get me Heat exchanger thermal formula and equations

Tom
 
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There's a lot more to understanding heat exchangers than a few formulas...
 
what type of the two fluids used in this heat exchanger?
the most imp formula which is used with the exchangers its doing the heat balance for these two fluids,lets say its a condenser,
so the two fluids are the steam and the water,
the formula used:
heat added to the water(Qadded)=the heat rejected by the steam(Qrej)
mdot(cw)*Cpw*(Tout-Tin)=Mdot(st)*hst
where:Mdot is:mass flow rate,Cp is:specific heat of water at constant pressure,T is:temperature&h is:the enthalpy of a saturated steam.

generally,its doing a heat balance for the two fluids using in the heat exchanger by the same way with the condenser.
let me know if i missed something with what I've mentioned,
thanks for the forum.
 
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