Test on Heat Exchangers

Objective

To determine the overall heat transfer coefficient and effectiveness of a double pipe heat exchanger under conditions of parallel flow and counter flow.

apparatus

Area, A = 0.06 m2

Cp = 4.187 KJ/Kg-K

Select type

Wh(Kg/min) 10
Wc(Kg/min) 10
Thi(°C) 10
Tho(°C) 10
Tci(°C) 10
Tco(°C) 10

Effectiveness
$$ε = \frac{W_c.C_p.(T_{co}-T_{ci})}{C_{min}.(T_{hi}-T_{ci})}$$

$$ε =$$

Overall Heat Transfer Coefficient
$$U = \frac{W_c.C_p.(T_{co}-T_{ci})}{A.(ΔT)_m}W/m.K$$

$$U =$$

$$W/m.K$$

Log mean Temp Difference

$$ (ΔT)M = \frac{Θ_i - Θ_o}{ln(Θ_i/Θ_o)} °C/m$$

$$ (ΔT)M = $$

$$°C/m$$