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Question 1 of 6
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When does cavitation in the feed pumps occur?
Question 2 of 6
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What is the purpose of an economiser?
Question 3 of 6
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What is the typical payback time of installing an economiser in a boiler system?
Question 4 of 6
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Why are feed valves problematic?
Question 5 of 6
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What is the main shortcoming of on/off level control?
Question 6 of 6
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What is direct boiler feed?
Question 6 of 6
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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.
You can find the answer here >
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.
You can find the answer here >
2: What is the purpose of an economiser?
To harness the energy of the boiler’s flue gas and reuse it in other parts of the system
2: What is the purpose of an economiser?
To build a boiler house in a more economical fashion
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2: What is the purpose of an economiser?
To harness the energy from the condenser and reuse it in other parts of the system
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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 are feed valves problematic?
They have a tendency to become unstable and start fluctuating
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4: Why are feed valves problematic?
Valves cause pressure loss, which increases energy consumption and requires larger pumps
4: Why are feed valves problematic?
Valves cause temperature loss
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5: What is the main shortcoming of on/off level control?
It does not maintain a constant level in the boiler
5: What is the main shortcoming of on/off level control?
It is the most expensive way of controlling the pumps
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5: What is the main shortcoming of on/off level control?
The energy consumption on the pumps is ridiculously high
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6: What is direct boiler feed?
Boiler feed without the use of feed pumps
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6: What is direct boiler feed?
Variable speed pumps equipped with level sensors to control the water level
6: What is direct boiler feed?
Boiler feed where the feed water is taken directly from the condensate tank
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