In general, the disposal of hot streams to the environment is not a good a practice due to the risk of violating EPA regulations and also, it represents as waste of potential useful energy. For example, raising the temperature of lakes, rivers, and atmosphere have negative consequences on the ecosystems. In this problem, a gas stream at 500°C contains eight percent mole carbon monoxide and the balance carbon dioxide. Before disposing this gas mixture stream into the atmosphere, it makes sense to recover some of its energy first. To achieve this we will use a heat exchanger where the gas stream flows across the tubes. Water flows inside the tubes entering at 25°C and it is fed at a ratio of 0.2 mole water per mole of the hot gas. The water is heating to its boiling point forming saturated steam at five bar. The steam produced can be used for heating or power generation in the facilities or as the feed for another unit operation. You can assume that heat exchanger is thermally well-insulated. This means that all the heat transfer from the hot gas goes into the water with not heat loss to the environment. Assuming a basis of one mole of feed gas, calculate the temperature of the gas leaving the heat exchanger. For thermodynamic properties of water use steam tables.

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Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.