Heat engineering calculation of heat heaters

Contents

1. Classification of heat exchangers

2. Basis of calculation theory of recuperative heat exchangers in stationary modes

3. Calculation of heat exchangers using the dimensionless method

3.1. Dimensionless characteristics

3.2. Use of dimensionless method for 8 recuperative heat exchangers

3.3. Application of dimensionless method for calculation of 9 regenerative heat exchangers

4. Purpose, device and operation principle of heat exchanger

5. Calculation of water-water heat exchanger

6. Water-to-water heater diagram

7. Schedule of change of coolant temperatures

8. Calculation of steam-water heat exchanger

9. Structural calculation of the pipe grid

10. Steam-water heater diagram

3. Calculation of heat exchangers using the dimensionless method

The dimensionless characteristics method is based on the use of dimensionless characteristics - the efficiency of the heat exchanger (a) and a dimensionless number of heat transfer units (NTUs). Compared to the traditional method of calculating heat exchangers using the value of the average arithmetic temperature head, the method of dimensionless characteristics has advantages in performing span calculation since it allows you to determine the final temperatures of the heat carriers immediately by analytical dependencies, without resorting to a large number of approximations.

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