If the chilled water temperature range for which the system is designed is not maintained…
How does the VPF design achieve energy and cost savings?
What is FLOWLIMIT?
By separating pump control from chiller design, what does the VPF design achieve?
Which of the following statements about VPF systems is true?
What affects a system’s total cost of ownership the most?
Test results
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Q: If the chilled water temperature range for which the system is designed is not maintained…
A: … you risk low Delta T syndrome
Q: If the chilled water temperature range for which the system is designed is not maintained…
A: …you need to install new control valves
Q: If the chilled water temperature range for which the system is designed is not maintained…
A: …you need to increase flow through the chillers
Q: How does the VPF design achieve energy and cost savings?
A: By keeping constant-flow chiller pumps in a separate system
Q: How does the VPF design achieve energy and cost savings?
A: By eliminating the constant-flow chilled water pumps by variable-flow
Q: How does the VPF design achieve energy and cost savings?
A: It doesn’t – but reliability is greatly increased
Q: What is FLOWLIMIT?
A: An external flow commissioning algorithm available from an app
Q: What is FLOWLIMIT?
A: An intelligent control valve placed after the pump
Q: What is FLOWLIMIT?
A: An electronic flow commissioning functionality built into the pump
Q: By separating pump control from chiller design, what does the VPF design achieve?
A: Ensures the pumps keep the water sufficiently cold to satisfy the building load
Q: By separating pump control from chiller design, what does the VPF design achieve?
A: A chiller and its primary pump typically operate in tandem
Q: By separating pump control from chiller design, what does the VPF design achieve?
A: The pumps maintain a target differential pressure, Delta P, at a specific point in the system
Q: Which of the following statements about VPF systems is true?
A: They are getting cheaper in installation and more energy efficient
Q: Which of the following statements about VPF systems is true?
A: They offer substantial energy savings, but are expensive compared to other system alternatives (like primary secondary)
Q: Which of the following statements about VPF systems is true?
A: They need more space in buildings or facilities compared to other system alternatives
Q: What affects a system’s total cost of ownership the most?
A: Investing to increase user comfort
Q: What affects a system’s total cost of ownership the most?
A: Low Delta T syndrome
Q: What affects a system’s total cost of ownership the most?
A: Low flow in the system