Geothermal water (cp = 4250 J/kg·K) at 75°C is to be used to heat fresh water (cp = 4180 J/kg·K) at 17°C at a rate of 1.2 kg/s in a double-pipe counter-flow heat exchanger. The heat transfer surface area is 25 m2, the overall heat transfer coefficient is 480 W/m2·K, and the mass flow rate of geothermal water is larger than that of fresh water. If the effectiveness of the heat exchanger is desired to be 0.823, determine the mass flow rate of geothermal water and the outlet temperatures of both fluids.
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.
Geothermal water (cp = 4250 J/kg·K) at 75°C is to
be used to heat fresh water (cp = 4180 J/kg·K) at 17°C at a
rate of 1.2 kg/s in a double-pipe counter-flow heat exchanger.
The heat transfer surface area is 25 m2, the overall heat transfer
coefficient is 480 W/m2·K, and the mass flow rate of geothermal
water is larger than that of fresh water. If the effectiveness
of the heat exchanger is desired to be 0.823, determine the mass
flow rate of geothermal water and the outlet temperatures of
both fluids.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 6 images
