🔀 Heat Exchanger — LMTD Method
Design and analyze heat exchangers using the Log Mean Temperature Difference method for parallel and counter flow configurations.
📝 Configuration
LMTD Method:
Q = U × A × LMTD
LMTD = (ΔT₁ - ΔT₂) / ln(ΔT₁/ΔT₂)
Parallel Flow:
ΔT₁ = T_hi - T_ci, ΔT₂ = T_ho - T_co
Counter Flow:
ΔT₁ = T_hi - T_co, ΔT₂ = T_ho - T_ci
ε = Q / Q_max = Q / [C_min(T_hi - T_ci)]
Q = U × A × LMTD
LMTD = (ΔT₁ - ΔT₂) / ln(ΔT₁/ΔT₂)
Parallel Flow:
ΔT₁ = T_hi - T_ci, ΔT₂ = T_ho - T_co
Counter Flow:
ΔT₁ = T_hi - T_co, ΔT₂ = T_ho - T_ci
ε = Q / Q_max = Q / [C_min(T_hi - T_ci)]
📊 Results & Visualization
Configure the inputs and click Calculate to see results.
ℹ️ About Heat Exchangers
Heat exchangers transfer thermal energy between two fluid streams. The LMTD method is commonly used for design problems where temperatures are known.
Configurations:
• Parallel Flow: Both fluids enter from the same end
• Counter Flow: Fluids enter from opposite ends — more effective, higher LMTD
Applications:
• Power plants (condensers, feedwater heaters)
• HVAC systems
• Chemical processing
• Automotive radiators
Heat exchangers transfer thermal energy between two fluid streams. The LMTD method is commonly used for design problems where temperatures are known.
Configurations:
• Parallel Flow: Both fluids enter from the same end
• Counter Flow: Fluids enter from opposite ends — more effective, higher LMTD
Applications:
• Power plants (condensers, feedwater heaters)
• HVAC systems
• Chemical processing
• Automotive radiators