Explanation: The refrigerant having lesser pressure drop is always considered to be kept at the annulus side of the double pipe setup, hence the cooling water in the inner tube as it faces larger pressure drops and in the tube side of as Shell-and-tube type setup.

Explanation: The water flows in the coils, which usually has fins to augment the heat transfer coefficient. The refrigerant usually flows through the shell side of the setup while in the case of smaller capacity condensers water is the one that flows in the shell.

Explanation: In evaporative condensers, the two mediums undergoing evaporation and heating are water and air, hence the setup should always have water and air both simultaneously.

Explanation: Evaporative condensers are used in places where water is scarce or limited. Since water is used in a closed setup, only a small part of the water evaporates while the rest is retained and hence the cooling towers and water-cooled condenser are used together to minimise the water loss.

Explanation: Evaporative condensers are used in places where water is scarce or limited. Since water is used in a closed setup, only a small part of the water evaporates while the rest is retained and hence the cooling towers and water-cooled condenser in a single unit are used together to minimise the water loss.

HRR = Qc /Qe

Explanation: HRR=\(\frac{Qc}{Qe}=\frac{Qe+Wc}{Qe}=1+\frac{1}{COP}\) is the required relation.

Explanation: The coefficient of performance is technically equal to the ratio of Heat absorbed Qe to the work done Wc.

3-4 = Cooling of condensate

Explanation: The Figure is the description of the typical efficiency curve for fins where the terms Ro and Ri are the outer and inner radius of the annular fin, the Abscissa is \(\frac{Ro-Ri}{\sqrt{\frac{h}{kt}}}\) h is the external heat transfer coefficient, k is the thermal conductivity of fin material and t is the thickness of the fin.