Calculate the tube heat exchanger, how to count the tube heat exchanger?

Yes, in fact, it can be known from the definition. Pipe: Each time a fluid flows through a set of heat exchanger tubes, it is called a pipe.

Shell stroke is the distance that fluid travels from left to right (or right to left) along the voids between the heat exchanger's housing, tube bundles, and baffles. The general shell stroke is the number of baffles plus one.

The sum of the outer surfaces of all heat exchanger tubes within the distance between the inner sides of the two tube sheets. f=n*l* 。Wherein, n = the number of tubes, l = the distance between the inner sides of the two tube plates, d = the outer diameter of the heat exchange noise barrier tube.

The construction principle and characteristics of plate heat exchanger: The plate heat exchanger is composed of high-efficiency heat transfer corrugated plates and frames. The plate is clamped by bolts between the fixed compression plate and the movable compression plate, and the flow channel of Xu Huai is formed inside the heat exchanger, and the plate is sealed with rubber between the plates.

There is a pipe connecting this device to the outside on the hold-down plate.

The flow velocity range of the pipe process of the pure tube heat exchanger is commonly dismantled: general liquid m s, gas core jujube 5-30 m s.

The commonly used flow rate of the tube heat exchanger pipe is as follows: generally Li Zhen liquid m s, gas m s. ,5~30;

Summary. The formula for calculating the heat exchange area of the tube heat exchanger is generally as follows: calculate the heat transfer area according to the heat transfer area = q u t) where q is the heat exchange, u is the heat transfer coefficient, and δt is the temperature difference, and the heat transfer area is obtained according to the actual needs.

Calculate the heat transfer area according to the number of pipes = the number of pipes The area of the pipes The coefficient of the pipes, the number of pipes refers to the number of tubes in the tube heat exchanger, and the pipe area refers to the area of a single tube, and the pipe coefficient takes into account the gap between the tubes and the heat exchange efficiency, and usually takes the value between them. Calculate the heat transfer area according to the flow rate = G CP T U LMTD) where g is the flow rate, cp is the specific heat at constant pressure, and lmtd is the logarithmic average temperature difference, and the heat transfer area is obtained according to the actual needs. It should be noted that different heat exchanger selection formulas are suitable for different situations, and the specific selection of which formula needs to be comprehensively considered in combination with the actual situation, the design parameters of the heat exchanger and the use environment, so as to achieve the best heat exchange effect and economic benefits.

The formula for calculating the heat exchange area of the tube heat exchanger is generally as follows: calculate the heat transfer area according to the heat transfer area = q u t) where q is the heat exchange, u is the heat transfer coefficient, and δt is the temperature difference, and the heat transfer area is obtained according to the actual needs. Calculate the heat transfer area according to the number of pipes = the number of pipes The area of the pipes The coefficient of pipes, wherein, the number of pipes refers to the number of tubes in the tube heat exchanger, and the pipe area refers to the area of a single tube.

Calculate the heat transfer area according to the flow rate = G CP T U LMTD) where g is the flow rate, cp is the specific heat at constant pressure, and lmtd is the logarithmic average temperature difference, and the heat transfer area is obtained according to the actual needs. It should be noted that different heat exchanger selection formulas are suitable for different situations to do skin source, and the specific selection of which formula needs to be comprehensively considered in combination with the actual situation, the design parameters of the heat exchanger and the use environment, so as to achieve the best heat exchange effect and economic benefits.

What are the units in the formula.

Premature grip heat transfer area = q u t), q is the heat transfer, u is the number of heat transfer, and δt is the temperature difference. According to the unit analysis method, the single-stage hand position of the heat transfer area is the unit of heat transfer, the unit of heat transfer coefficient and the unit of temperature difference), the unit of heat transfer in the usual SI system is joules (j), the unit of heat transfer coefficient is watts (square meters Kelvin), and the unit of temperature difference is Celsius ( ) or Kelvin (k). Therefore, the unit of heat transfer area is square meters (m).

Summary. Hello dear<>

The answer you are looking for: Hello classmates The formula for the selection of the heat exchange area of the tube heat exchanger is as follows: The formula for the selection of the heat exchange area of the tube heat exchanger is as follows:

a = q u t) where a represents the heat exchange area (in m); q indicates the amount of heat transferred (in w or j s); u represents the heat transfer coefficient (in w (m ·k)); t denotes the temperature difference (in k or ). Specifically, the following factors need to be taken into account in the calculation of the heat exchange area: Heat transfer volume:

That is, the amount of heat that needs to be transferred, which usually needs to be calculated according to the specific heat exchange application and process parameters.

Calculation formula for the selection of heat exchange area of tube heat exchanger.

Hello dear<>

The answer you are looking for: Hello classmates The formula for the selection and calculation of the heat exchange area of the tube heat exchanger is as follows: The formula for the selection and calculation of the closed and heat exchange area of the tube heat exchanger is as follows

a = q u t) where a represents the heat exchange area (in m); q indicates the amount of heat transferred (in w or j s); u represents the heat transfer coefficient (hail denier unit is w (m ·k)); t denotes the temperature difference (in k or ). Specifically, the following factors need to be taken into account in the calculation of the heat exchange area: Heat transfer volume:

That is, the amount of heat that needs to be transferred, the car needs to be calculated according to the specific heat exchange application and process parameters.

Hello dear<>

The answer you are looking for: Hello classmates Heat transfer coefficient: that is, the heat transfer performance inside the heat exchanger, usually needs to consider the material of the pipe, the nature of the fluid, the flow rate and other factors, you can refer to the relevant heat transfer formula to calculate the collapse.

Temperature difference: that is, the temperature difference between the heat source and the cold source, which usually needs to be calculated according to the specific application and process parameters. It should be noted that the calculation of heat exchange area is only a reference index in the selection process, and other factors need to be taken into account in the actual selection, such as pressure loss, material cost, installation and maintenance cost, etc., in order to comprehensively evaluate different types of heat exchangers and select the most suitable one for application

The sum of the outer surface area of all heat exchanger tubes within the distance between the inner sides of the two tube sheets. f=n*l*n=number of tubes.

l = distance between the inner sides of the two tube plates.

d=Diameter of the outer straight lift of the heat exchanger tube.

The heat exchange area selection calculation formula of heat exchanger usually includes the following steps:

1.Determine the heat load: The first step is to determine the heat load that the heat exchanger needs to handle, i.e. the amount of heat or power that needs to be transferred. This can be calculated or estimated based on specific application scenarios and needs.

2.Determine the heat transfer coefficient: The heat transfer coefficient refers to the heat conduction efficiency during heat transfer in a heat exchanger, which depends on factors such as the nature of the fluid, the flow rate, the pipe material, etc. The heat transfer coefficient can be estimated or calculated by empirical formulas or experimental data.

3.Determine the temperature difference: The temperature difference refers to the temperature difference between the two sides of the fluid, and it is also the dynamic force that drives the heat transfer. According to the specific application scenario and design requirements, determine the appropriate temperature difference.

4.Calculation of heat transfer area: According to the heat transfer equation, the heat transfer area can be calculated by the following formula:

q = u × a × t

Among them, Q represents the heat negative bipolar charge (heat or power), U represents the heat transfer coefficient, A represents the heat exchange area, and ΔT represents the temperature difference.

The heat exchange area a can be calculated by the above formula, or the appropriate heat exchanger model can be selected through commonly used heat exchanger design manuals or software.

5.Choosing the right heat exchanger: Based on the calculated heat transfer area, the appropriate specifications and models can be selected from different models of heat exchangers to meet the design requirements and application requirements.

It should be noted that in the actual engineering design, other factors need to be considered, such as fluid flow, material selection, pressure loss, etc. Therefore, it is best to consult a professional engineer or use a professional software tool to ensure the reliability and effectiveness of the design when calculating the heat exchange area of the heat exchanger.

The sum of the outer surface area of all heat exchanger tubes within the distance between the inner sides of the two tube sheets.

f=n*l*

n = number of tubes.

l = distance between the inside of the two tube sheets.

d = outer diameter of the heat exchanger tube.

The formula for calculating the heat exchange area is f=q kk*tm

f is the effective heat exchange area of the heat exchanger; q is the total heat exchange; k is the dirt coefficient generally taken; k is the heat transfer coefficient ; tm is the logarithmic mean temperature difference.

Setting: specific heat of air d[j (kg*k)], density p (kg m 3), tube thickness h (m), thermal conductivity of copper [j (m*k)]. The heat dissipation area is s(m*2).

The average temperature difference δt=(82+33) 2-29=28 5(k) then the heat dissipation power is: a=δt*12000*p*d 3600(j s).

At the same time a= *s*δt h, from which s can be solved.