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

Question 4 of 6
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What is the purpose of the condenser?

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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?

Question 6 of 6
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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: 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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3: 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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3: Why is chemical treatment of the make-up water necessary?
To prevent scaling in the boiler and the water from turning acidic when heated.
4: What is the purpose of the condenser?
To ensure that no pockets of steam remain in the condensate when returning to the Boiler house.
4: 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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4: 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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5: 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.
5: When does cavitation in the feed pumps occur?
When air enters the condensate system and causes bubbles in the water.
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5: 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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6: What is the main shortcoming of on/off level control?
It does not maintain a constant level in the boiler
6: What is the main shortcoming of on/off level control?
It is the most expensive way of controlling the pumps
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6: What is the main shortcoming of on/off level control?
The energy consumption on the pumps is ridiculously high
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