Question

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 30⁰ C and the entire stored 120 litres of water is initially cooled to 10⁰ 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
(Specific heat of water is 4.2 kJ kg⁻¹ K⁻¹ and the density of water is 1000 kg m⁻³)
(A) 1600 (B) 2067
(C) 2533 (D) 3933

Answer 1

Answer:

sorry I don't know the right answer