In an oil cooler, oil $(m= 2500kg/hr and C_p= 1.9 kJ/kg-K)$ at $160^0C$ is cooled by water$(m= 1500kg/hr \ and \ C_p= 4.187 kJ/kg-K)$ entering at $35^0C$. Determine Capacity ratio, NTU and effectiveness if the overall heat transfer coefficient is $300 W/m^2K$. Assume parallel flow.

Given,

ṁh=2500 kg/hr =0.694 kg/s (Mass flow rate of Hot fluid)

Cph=1.9 kJ/kgK = 1900 kJ/kgK (Specific Heat of Hot fluid)

th1=160℃=433K (Entry Temperature of Hot fluid )

ṁc=1500 kg/hr = 0.416 kg/s (Mass flow rate of Cold Fluid)

Cpc=4.187 kJ/kgK = 4187 J/kgK (Specific Heat of Cold Fluid)

tc1=35℃=308K …