Effective cleaning – key to boiler efficiency
Remo Scheidegger, Clyde Bergemann Africa
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Energy Efficiency Made Simple Vol III: Energy and enviroFiciency
November 2012 - Chapter 6: pages 82 - 83
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The basic theory behind a boiler is very simple. Add heat to water and generate steam. As the complexity of a boiler system increases the theory gets less simple and it becomes critical that the correct amount of heat is added for the amount of water present in order to generate the correct amount of steam at the correct pressure and temperature. Ultimately, the entire generation process is one great energy balance and as such, heat needs to be transferred to the correct point at the correct rate.
To achieve this requires that systems are controlled in an effective manner across a number of different control loops. Most of the control systems currently in operation on South African boilers do not have online intelligence that caters for major variations in operating conditions and rely on a base-line condition in order to operate effectively. This base line is a clean, or relatively clean, furnace and boiler and a relatively constant fuel supply.
- Clean heat exchanger surfaces within the boiler are crucial for maintaining the original design boiler efficiency.
- Optimising the boiler cleaning equipment will go a long way to minimising boiler losses.
- Most control systems currently in operation on South African boilers do not have online intelligence that caters for major variations in operating conditions.