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Why are feed valves problematic?

Question 2 of 6
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What is the purpose of an economiser?

Question 3 of 6
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When does cavitation in the feed pumps occur?

Question 4 of 6
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How does an economiser work?

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What is the purpose of the condenser?

Question 6 of 6
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What is the typical payback time of installing an economiser in a boiler system?

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1: Why are feed valves problematic?
They have a tendency to become unstable and start fluctuating
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1: Why are feed valves problematic?
Valves cause pressure loss, which increases energy consumption and requires larger pumps
1: Why are feed valves problematic?
Valves cause temperature loss
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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: 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.
3: When does cavitation in the feed pumps occur?
When air enters the condensate system and causes bubbles in the water.
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3: 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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4: 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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4: 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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4: 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.
5: What is the purpose of the condenser?
To ensure that no pockets of steam remain in the condensate when returning to the Boiler house.
5: What is the purpose of the condenser?
To ensure that the temperature of the condensate is lower than the make-up water.
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5: What is the purpose of the condenser?
To utilize the remaining heat in the condensate to preheat the make-up water.
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6: 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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6: What is the typical payback time of installing an economiser in a boiler system?
Less than two years.
6: What is the typical payback time of installing an economiser in a boiler system?
More than two years.
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