A refrigerating plant is required to produce 2.5 tonnes of ice per day at −4 °C from water at 20 °C. The temperature range in the compressor is between 25 °C and −6 °C. Calculate the power required to drive the compressor, assuming an ideal (Carnot) cycle. Take latent heat of ice = 335 kJ/kg, specific heat of ice = 2.1 kJ/kg·K and specific heat of water = 4.187 kJ/kg·K. (Answer in kW.)