A water cooler of storage capacity 120 litres can cool water

Last updated: 6/11/2023

A water cooler of storage capacity 120 litres can cool water at a constant rate of P watts In a closed circulation system as shown schematically in the figure the water from the cooler is used to cool an external device that generates constantly 3 kW of heat thermal load The temperature of water fed into the device cannot exceed 30 C and the entire stored 120 litres of water is initially cooled to 10 C The entire system is thermally insulated The minimum value of P in watts for which the device can be operated for 3 hours is Cooler Hot Cold Device Specific heat of water is 4 2 kJ kg 1 K 1 and the density of water is 1000 kg m A 1600 B 2067 C 2533 D 3933