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- Hot water at 60 °C is routed from one 3. External flow (cylinder in cross flow with tube walls,. building in which it is generated to an adjoining building in whicn it is used for space heating. Fluid transport between the buildings occurs in a steel pipe (k = 60 ) of 100-mm outside diameter and 8-mm m.K wall thickness. During the winter, representative environmental conditions involve air at T = -5 °C and V = 3 m/s in cross flow over the pipe. a) If the cost of producing hot water is $0.05 per kW.h what is the representative daily cost of heat loss from an uninsulated pipe to the air per meter of pipe length? The convection resistance associated with the water flow in the pipe may be neglected. b) Determine the savings associated with application of a 10-mm-thick coating of urethane insulation (k = 0.026- to the outer surface of the pipe. m.K

- Hot water at 60 °C is routed from one 3. External flow (cylinder in cross flow with tube walls,. building in which it is generated to an adjoining building in whicn it is used for space heating. Fluid transport between the buildings occurs in a steel pipe (k = 60 ) of 100-mm outside diameter and 8-mm m.K wall thickness. During the winter, representative environmental conditions involve air at T = -5 °C and V = 3 m/s in cross flow over the pipe. a) If the cost of producing hot water is $0.05 per kW.h what is the representative daily cost of heat loss from an uninsulated pipe to the air per meter of pipe length? The convection resistance associated with the water flow in the pipe may be neglected. b) Determine the savings associated with application of a 10-mm-thick coating of urethane insulation (k = 0.026- to the outer surface of the pipe. m.K

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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- Hot water at 60 °C is routed from one 3. External flow (cylinder in cross flow with tube walls,. building in which it is generated to an adjoining building in whicn it is used for space heating. Fluid transport between the buildings occurs in a steel pipe (k = 60 ) of 100-mm outside diameter and 8-mm m.K wall thickness. During the winter, representative environmental conditions involve air at T = -5 °C and V = 3 m/s in cross flow over the pipe. a) If the cost of producing hot water is $0.05 per kW.h what is the representative daily cost of heat loss from an uninsulated pipe to the air per meter of pipe length? The convection resistance associated with the water flow in the pipe may be neglected. b) Determine the savings associated with application of a 10-mm-thick coating of urethane insulation (k = 0.026- to the outer surface of the pipe. m.K
Transcribed Image Text:- Hot water at 60 °C is routed from one 3. External flow (cylinder in cross flow with tube walls,. building in which it is generated to an adjoining building in whicn it is used for space heating. Fluid transport between the buildings occurs in a steel pipe (k = 60 ) of 100-mm outside diameter and 8-mm m.K wall thickness. During the winter, representative environmental conditions involve air at T = -5 °C and V = 3 m/s in cross flow over the pipe. a) If the cost of producing hot water is $0.05 per kW.h what is the representative daily cost of heat loss from an uninsulated pipe to the air per meter of pipe length? The convection resistance associated with the water flow in the pipe may be neglected. b) Determine the savings associated with application of a 10-mm-thick coating of urethane insulation (k = 0.026- to the outer surface of the pipe. m.K
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