How does an economiser work?
Why is chemical treatment of the make-up water necessary?
What is the main shortcoming of on/off level control?
What is the typical payback time of installing an economiser in a boiler system?
Why are feed valves problematic?
When does cavitation in the feed pumps occur?
Test results
Q: How does an economiser work?
A: In an economiser condensate is led past a network of flue gas pipes, transferring heat from the condensate to the flue gas.
Q: How does an economiser work?
A: 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.
Q: How does an economiser work?
A: In an economiser flue gas is led past a network of pipes with cold water, transferring heat from the flue gas to the water.
Q: Why is chemical treatment of the make-up water necessary?
A: To give the water a distinctive small to avoid confusion with drinking water.
Q: Why is chemical treatment of the make-up water necessary?
A: To ensure that scaling is retained in the boiler and not in the piping and equipment.
Q: Why is chemical treatment of the make-up water necessary?
A: To prevent scaling in the boiler and the water from turning acidic when heated.
Q: What is the main shortcoming of on/off level control?
A: It does not maintain a constant level in the boiler
Q: What is the main shortcoming of on/off level control?
A: It is the most expensive way of controlling the pumps
Q: What is the main shortcoming of on/off level control?
A: The energy consumption on the pumps is ridiculously high
Q: What is the typical payback time of installing an economiser in a boiler system?
A: Installing an economiser is rarely a good idea and gives very long payback time.
Q: What is the typical payback time of installing an economiser in a boiler system?
A: Less than two years.
Q: What is the typical payback time of installing an economiser in a boiler system?
A: More than two years.
Q: Why are feed valves problematic?
A: They have a tendency to become unstable and start fluctuating
Q: Why are feed valves problematic?
A: Valves cause pressure loss, which increases energy consumption and requires larger pumps
Q: Why are feed valves problematic?
A: Valves cause temperature loss
Q: When does cavitation in the feed pumps occur?
A: Cavitation occurs when the pressure in the first impeller or pipes drops below the vapour pressure of the water.
Q: When does cavitation in the feed pumps occur?
A: When air enters the condensate system and causes bubbles in the water.
Q: When does cavitation in the feed pumps occur?
A: Cavitation occurs when the pressure in the first impeller or pipes raise above the vapour pressure of the water.