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(ofA water cooler of storage capacity 120 litres cancool water at a constant rate of P watts. In aclosed circulation system (as shown schematicallyin the figure), the water from the cooter is used tocool an external device that generates constantly3 KW of heat (thermal load). The temperature ofwater fed into the device cannot exceed 30^° C andthe entire stored 120 litres of water is initialycooled to 10^° C. the entire system is thermnsulated. The 'mivhich the device can be operated forinimum value of P (in watts) for3 hours is (specific heat of water is 4.2 kj/kg /k |
| Answer» (ofA water cooler of storage capacity 120 litres cancool water at a constant rate of P watts. In aclosed circulation system (as shown schematicallyin the figure), the water from the cooter is used tocool an external device that generates constantly3 KW of heat (thermal load). The temperature ofwater fed into the device cannot exceed 30^° C andthe entire stored 120 litres of water is initialycooled to 10^° C. the entire system is thermnsulated. The 'mivhich the device can be operated forinimum value of P (in watts) for3 hours is (specific heat of water is 4.2 kj/kg /k | |