Which option is a potential environmental risk of adopting a new technology?

1)Saturated steam at 1.20bar (absolute)is condensed on the outside ofahorizontal steel pipe with an inside and outside diameter

S_A_V [24]

Answer:

hi = 7026.8 W/m^2.k

Explanation:

Given data :

pressure of saturated steam = 1.2 bar

Horizontal steel pipe : inside diameter = 0.620 , outside diameter = 0.750 inches

temperature of water at entry = 60°F

temperature of water at exit = 75°F

velocity of water = 6 ft/s

<u>Calculate the Inside convective heat transfer coefficient ( hi ) </u>

mean temperature ( Tm ) = 60 + 75 / 2 = 67.5°F ≈ 292.877 K ≈ 19.727°C

next : find the properties of water at this temperature ( 19.727°C )

thermal conductivity = 0.598 w/m.k

density = 1000 kg/m^3

specific heat ( Cp ) = 4.18 KJ/kg.k

viscosity = 0.001 pa.s

velocity of water = 6 ft/s ≈ 1.8288 m/s

∴ Re ( Reynolds number ) = 28712.16

and Prandtl number ( Pr ) = (4180 * 0.001) / 0.598 = 6.989

finally<em> to determine the inside convective heat transfer coefficient we will apply the Dittos - Bolter equation</em>

hi = 7026.8 w/m^2.k

attached below is the remaining solution

3 0

3 years ago

Explain why it is important to model the context of a system that is being developed. Give two examples of possible errors that

Sedbober [7]

Answer:

Explanation:

System models are created and used in order for all of the individuals involved in the process to be able to see exactly how each module that is being created connects to the rest of the system. This allows every developer to understand each module's/part's function and develop it with the entire system in mind. This also makes it easier to implement newer features. If a model is not made then the developers may miss key features and when it is time to piece all of the components of the system together, the overall process can become a jumbled mess.

5 0

3 years ago

True or False? A constricting nozzle is used

marissa [1.9K]

Answer:

True

Explanation:

Principles of plasma arc cutting, Uses a constricting nozzle to create, concentrate, and direct the high-velocity plasma. Plasma gas is always used

in plasma arc cutting When shielding gas is also used, the process is called dual flow plasma arc cutting. I hope this helps.

6 0

4 years ago

Describe how analog electronics is applied in using the photocopier or old land-line

cupoosta [38]

Answer:

freiend 4 answers

Explanation:

3 0

3 years ago

Explain the difference in the heat transfer modes of conduction and convection.

LiRa [457]

Explanation:

Conduction is the heat transfer through a stationary matter by the physical contact.

For example, the heat transferred between electric burner of stove and bottom of pan is transferred by the process of conduction.

Convection is heat transfer by macroscopic movement of the fluid. The particles of the fluid carry the current within themselves.

For example, the water is the pot is warmed overall by heat transferred by the process of convection.

4 0

3 years ago