Chem Eng rate of heat transfer qts

In summary, the rate of heat transfer in Chemical Engineering is a measure of the amount of heat transferred per unit time per unit area. It is calculated using the equation q = kA(T1-T2)/L and can be affected by various factors such as temperature difference, thermal conductivity, surface area, and thickness of the material. A higher rate of heat transfer is directly related to the efficiency of a process, and it can be improved by using materials with higher thermal conductivity, increasing surface area, and using heat transfer enhancement techniques.
  • #1
tcaldwell
7
0
Heat Transfer Qts
Engine oil at 60 oC flows over flat plate whose temperature is at 20 oC with a velocity of 2 m s-1. The length of the plate is 5m. What is the film temperature and the rate of heat transfer per unit width of the entire plate?
Additional information (at the film temperature):
Thermal conductivity of oil: Prandtl number:
Dynamic viscosity:
k1 = 0.144 W m-1 K-1
Pr = 2870
u = 0.21 kg m-1 s-1

Help!
Can't get a Reynolds number without density..
Is film temperature 40 degrees Celsius?
 
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  • #2
Qts solved...
Was right..lecturer wrong AGAIN..was then provided with engine oil density in qts
 

1. What is the rate of heat transfer in Chemical Engineering?

The rate of heat transfer, also known as the heat flux, is a measure of the amount of heat that is transferred per unit time per unit area. In Chemical Engineering, it is an important concept in designing and optimizing processes involving heat transfer, such as in heat exchangers or chemical reactors.

2. How is the rate of heat transfer calculated?

The rate of heat transfer can be calculated using the equation q = kA(T1-T2)/L, where q is the heat flux, k is the thermal conductivity of the material, A is the surface area, T1 and T2 are the temperatures of the two sides of the material, and L is the thickness of the material.

3. What factors affect the rate of heat transfer in Chemical Engineering?

There are several factors that can affect the rate of heat transfer in Chemical Engineering, including the temperature difference between the two sides of the material, the thermal conductivity of the material, the surface area, and the thickness of the material. Other factors such as the type of heat transfer (conduction, convection, or radiation) and any barriers or insulating materials can also impact the rate of heat transfer.

4. How is the rate of heat transfer related to the efficiency of a process?

The rate of heat transfer is directly related to the efficiency of a process. In general, a higher rate of heat transfer means that the process is more efficient, as it can transfer heat more quickly and effectively. This is important in Chemical Engineering processes that require precise temperature control and efficiency to produce desired results.

5. Can the rate of heat transfer be increased or improved?

Yes, the rate of heat transfer can be increased or improved through various methods. Some ways to improve heat transfer include using materials with higher thermal conductivity, increasing the surface area, reducing the thickness of the material, and using heat transfer enhancement techniques such as fins or turbulators. It is important for Chemical Engineers to consider these factors when designing and optimizing processes to improve heat transfer rates.

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