A single effect evaporator is used to concentrate a dilute stream of sugar syrup containing 3% dissolved solids to 7% solids. The solution density, ρ 700kg/m3. The feed stream enters the evaporator at 385K with feed rate of 700m3/s and vapor exits the evaporator at 326m3/s. Steam is available at a pressure of 270kPa (abs) and an absolute pressure of 153kPa is maintained in the vapor. Assuming a heat transfer coefficient of 120W/m2K, calculate the following List all your assumptions 2.1 Calculate the rate at which the concentrate exits the evaporator. 2.2 Calculate the steam consumption. 2.3 Calculate the heat transfer are required. 2.4 Calculate the steam economy. 2.5 If the tube dimensions are 5m high and 50mm diameter, how many tubes in the evaporator?
A single effect evaporator is used to concentrate a dilute stream of sugar syrup containing 3% dissolved solids to 7% solids. The solution density, ρ 700kg/m3. The feed stream enters the evaporator at 385K with feed rate of 700m3/s and vapor exits the evaporator at 326m3/s. Steam is available at a pressure of 270kPa (abs) and an absolute pressure of 153kPa is maintained in the vapor. Assuming a heat transfer coefficient of 120W/m2K, calculate the following
List all your assumptions
2.1 Calculate the rate at which the concentrate exits the evaporator.
2.2 Calculate the steam consumption.
2.3 Calculate the heat transfer are required.
2.4 Calculate the steam economy.
2.5 If the tube dimensions are 5m high and 50mm diameter, how many tubes in the evaporator?
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