Determine the capacity of a boiler

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    Boiler Capacity
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Discussion Overview

The discussion revolves around determining the capacity of a boiler required to generate steam for heating water. Participants consider various factors such as flow rate, temperature differences, and the efficiency of the heat exchanger in their calculations.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Exploratory

Main Points Raised

  • One participant notes the importance of specifying the heat exchanger's efficiency and the steam inlet temperature for accurate calculations.
  • Another participant suggests that the power output and maximum load must be checked to estimate the required steam production.
  • A participant introduces the formula Q=m c DeltaT to calculate peak load, where m is the flow rate, c is the specific heat ratio, and DeltaT is the temperature difference.
  • Further, it is mentioned that complex calculations involving forced convection and conduction are necessary to determine heat transfer from steam to water, requiring additional unknown parameters such as conductivity and steam entry conditions.

Areas of Agreement / Disagreement

Participants express differing views on the necessary parameters and calculations involved in determining boiler capacity, indicating that multiple competing approaches and models are present in the discussion.

Contextual Notes

Participants highlight the need for specific information about the heat exchanger and steam conditions, which remain unspecified, potentially affecting the accuracy of their calculations.

shakal_4_ever
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i want to know how can i determine the capacity of a boiler needed to generate steam which will be used in order to heat water.

take into consedration that i know the flow rate of the water and the inlet and aoutlet temprature to and from the exchanger.
 
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You haven't specified anything about the heat exchanger or its efficiency and you need to factor that in before you can determine how much steam (at what temperature and pressure) you need. Remember that steam inlet temperature to the heat exchanger is vitally important. Do you know why?
 
For starters, delta-t times flow rate (in lb/hr) is btu...
 
well you got to check the power output you need... the max load that is... then you know the steam to be produced... one way to estimate the size of the boiler...
 
i think the peak load needed can be calculated using Q=m c DeltaT, m being flow rate, c specific heat ratio, and DeltaT should be the difference in temperature from inlet to outlet thus telling us how much heat the water absorbed. after this step you would have to do complex forced convection/conduction/and convection to find the transfer of heat from steam to the water. to do this u would need those unknowns: conductivity of the pipe(or material), length, entry temp of steam, velocity of entry of steam. usually one of the last 2 is unknown and u wil use the formula to find it.
 

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