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When does cavitation in the feed pumps occur?

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What is the main shortcoming of on/off level control?

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What is the typical payback time of installing an economiser in a boiler system?

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Why is chemical treatment of the make-up water necessary?

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What is direct boiler feed?

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How does an economiser work?

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1: When does cavitation in the feed pumps occur?
Cavitation occurs when the pressure in the first impeller or pipes drops below the vapour pressure of the water.
1: When does cavitation in the feed pumps occur?
When air enters the condensate system and causes bubbles in the water.
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1: When does cavitation in the feed pumps occur?
Cavitation occurs when the pressure in the first impeller or pipes raise above the vapour pressure of the water.
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2: What is the main shortcoming of on/off level control?
It does not maintain a constant level in the boiler
2: What is the main shortcoming of on/off level control?
It is the most expensive way of controlling the pumps
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2: What is the main shortcoming of on/off level control?
The energy consumption on the pumps is ridiculously high
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3: What is the typical payback time of installing an economiser in a boiler system?
Installing an economiser is rarely a good idea and gives very long payback time.
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3: What is the typical payback time of installing an economiser in a boiler system?
Less than two years.
3: What is the typical payback time of installing an economiser in a boiler system?
More than two years.
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4: Why is chemical treatment of the make-up water necessary?
To give the water a distinctive small to avoid confusion with drinking water.
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4: Why is chemical treatment of the make-up water necessary?
To ensure that scaling is retained in the boiler and not in the piping and equipment.
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4: Why is chemical treatment of the make-up water necessary?
To prevent scaling in the boiler and the water from turning acidic when heated.
5: What is direct boiler feed?
Boiler feed without the use of feed pumps
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5: What is direct boiler feed?
Variable speed pumps equipped with level sensors to control the water level
5: What is direct boiler feed?
Boiler feed where the feed water is taken directly from the condensate tank
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6: How does an economiser work?
In an economiser condensate is led past a network of flue gas pipes, transferring heat from the condensate to the flue gas.
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6: How does an economiser work?
In an economiser cold flue gas is led past a network of pipes with hot water, transferring heat from the water to the flue gas to avoid condensation.
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6: How does an economiser work?
In an economiser flue gas is led past a network of pipes with cold water, transferring heat from the flue gas to the water.