A 4-pass-low-pressure surface type feedwater heater is designed to heat 92,730 kg/hr of feedwater from 40°C initial to 80°C final temperature using steam bleed at 70 kpa abs. containing 2,645 Kj/kg enthalpy. Assume no subcooling of condensate, determine the effective length of 19 mm O.D x 2 mm thick Muntz metal tubes to be installed, if the water velocity inside the tubes is 1.22 m/s and U = 3000 W /m²k based on the external surface of the tubes.

A 4-pass-low-pressure surface type feedwater heater is designed to heat 92,730 kg/hr of feedwater from 40°C initial to 80°C final temperature using steam bleed at 70 kpa abs. containing 2,645 Kj/kg enthalpy. Assume no subcooling of condensate, determine the effective length of 19 mm O.D x 2 mm thick Muntz metal tubes to be installed, if the water velocity inside the tubes is 1.22 m/s and U = 3000 W /m²k based on the external surface of the tubes.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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Strengthening of Alloys

Strengthening of the alloys is required as metals become weak due to various lattice defects, metal bonding phenomena. The strength of the metals is not enough for any mechanical work. The internal dislocations of any metals arise due to forming processes. Due to the movement of these dislocations, the metals are plastically deformed.

Question

A 4-pass-low-pressure surface type feedwater heater is designed to heat
92,730 kg/hr of feedwater from 40°C initial to 80°C final temperature using
steam bleed at 70 kpa abs. containing 2,645 Kj/kg enthalpy. Assume no
subcooling of condensate, determine the effective length of 19 mm O.D x 2
mm thick Muntz metal tubes to be installed, if the water velocity inside the
tubes is 1.22 m/s and U = 3000 W /m²k based on the external surface of the
tubes.
4.

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