- 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

Q: For heat transfer, the surface resistance was characterized by a convective heat transfer…

A: For convective heat transfer the heat transfer quotient h is given by:

Q: find surtace temps Tz T,+ Ta in terms of o る-7 J. L に

A: Heat diffussion equation is given by- ∇2T + qK = 1α∂T∂t α=kρCpV=Thermal diffusivity Since  steady…

Q: What is the name of the device shown in the figure? Feed Packed Drying fuel bed Pyrolysis Air Air…

A: Updraft gasifier An updraft gasifier is also known as a counter-current gasifier where the air…

Q: Viscosity varies with temperature according to which of the graphs below?

A: How does viscosity vary with temperature?

Q: Distinguish between carnot heat engine and refrigerator

A: Carnot heat engine is a theoretical engine which operates between two temperatures on a Carnot…

Q: True or false 1. Electrical conductivity of copper is very low

A: Electrical conductivity is the measurement of the transport of the electric charge through the…

Q: Two kilograms of wet polymeric hollow fiber membrane is to be dried by heating in a furnace. The wet…

A:

Q: Temperature difference is not the driving force for heat transfer. O yes O No

A: heat transfer is the change in thermal energy by difference in temperature of two body let say…

Q: Heat Transfer      Please answer d)

A:

Q: Which of the following statements concerning Nusselt number Nu is (are) true? [A] Nu indicates the…

A: Nu Number=Nusselt number are defined as ratio of convective heat transfer to conductive heat…

Q: One of these is an advantage of Biodiesel. O All of these O Low freezing point Good as a lubricant O…

A: Biodiesel is a type of diesel fuel that is made from the usage of plants or animal waste, vegetable…

Q: Represents and describes by means of a diagram the main parts of the evaporation equipment.

A: Evaporation  It is the process of concentrating the stream by removing water. The process is energy…

Convective Mass Transfer between Phases

Mass transfer means the transport or movement of mass using streams, phases, components, and so on from one location to another.