Consider a new design of a thermal reactor that requires square arrays of fuel rods. Heat...

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Consider a new design of a thermal reactor that requires square arrays of fuel rods. Heat is being generated uniformly along the fuel rods. Water and helium are being considered as single-phase coolants. Relevant coolant properties are given in the Table. The design condition is that the maximum cladding surface temperature should remain below 316°C. 1. Find the minimum mass flow rate of water to meet the design requirement. 2. Would the required mass flow rate of helium be higher or lower than that of water? Coolant Properties for Problem 5.3 Coolant p(kg/m³) Water 735.3 Helium 0.865 Geometry of square array P = pitch = 1.5cm D = fuel rod diameter = 1.15cm H = fuel height = 3.5 m Operating conditions cp(kJ/(kg*K)) 5.317 5.225 2 Heat flux = 80 W/cm² Coolant inlet temperature = 260°C µ(kg/(m*s)) 0.955*10-4 0.298*10-4 k(W/(m*K)) 0.564 0.230 Consider a new design of a thermal reactor that requires square arrays of fuel rods. Heat is being generated uniformly along the fuel rods. Water and helium are being considered as single-phase coolants. Relevant coolant properties are given in the Table. The design condition is that the maximum cladding surface temperature should remain below 316°C. 1. Find the minimum mass flow rate of water to meet the design requirement. 2. Would the required mass flow rate of helium be higher or lower than that of water? Coolant Properties for Problem 5.3 Coolant p(kg/m³) Water 735.3 Helium 0.865 Geometry of square array P = pitch = 1.5cm D = fuel rod diameter = 1.15cm H = fuel height = 3.5 m Operating conditions cp(kJ/(kg*K)) 5.317 5.225 2 Heat flux = 80 W/cm² Coolant inlet temperature = 260°C µ(kg/(m*s)) 0.955*10-4 0.298*10-4 k(W/(m*K)) 0.564 0.230

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To solve this problem we need to calculate the heat transfer rate and then use it to determine the minimum mass flow rate of water and compare it with the required mass flow rate of helium Lets go ste... View the full answer