1
Why is it important to understand the effects of control modes in an air conditioning system?
2
What needs to be done in order to change a constant flow system with 3-way valves?
3
For which control mode is the following true: The pump head and speed is adjusted according to a setting in the pump.
4
For which control mode is the following true: The head is adjusted according to differential pressure measurements in a reference point, and the head decreases when the flow is reduced.
5
Which one of the three typical air con systems has low operation costs and high flexibility?
Test results
Q: Why is it important to understand the effects of control modes in an air conditioning system?
A: The right control mode means reduced energy consumption and savings
Q: Why is it important to understand the effects of control modes in an air conditioning system?
A: The wrong control mode can damage the pumps
Q: Why is it important to understand the effects of control modes in an air conditioning system?
A: The wrong control mode results in excessive water usage
Q: What needs to be done in order to change a constant flow system with 3-way valves?
A: Replace secondary constant speed pumps with speed controlled pumps
Q: What needs to be done in order to change a constant flow system with 3-way valves?
A: Replace 3-way valves with 2-way valves
Q: What needs to be done in order to change a constant flow system with 3-way valves?
A: Replace constant speed pumps with speed controlled pumps and replace 3-way valves with 2-way valves
Q: For which control mode is the following true: The pump head and speed is adjusted according to a setting in the pump.
A: Proportional differential pressure mode (calculated)
Q: For which control mode is the following true: The pump head and speed is adjusted according to a setting in the pump.
A: Proportional differential pressure mode (measured)
Q: For which control mode is the following true: The pump head and speed is adjusted according to a setting in the pump.
A: Temperature control mode
Q: For which control mode is the following true: The head is adjusted according to differential pressure measurements in a reference point, and the head decreases when the flow is reduced.
A: Temperature control mode
Q: For which control mode is the following true: The head is adjusted according to differential pressure measurements in a reference point, and the head decreases when the flow is reduced.
A: Proportional differential pressure mode (calculated)
Q: For which control mode is the following true: The head is adjusted according to differential pressure measurements in a reference point, and the head decreases when the flow is reduced.
A: Proportional differential pressure mode (measured)
Q: Which one of the three typical air con systems has low operation costs and high flexibility?
A: A variable flow system with a variable flow chiller
Q: Which one of the three typical air con systems has low operation costs and high flexibility?
A: A variable flow system with a constant flow chiller
Q: Which one of the three typical air con systems has low operation costs and high flexibility?
A: A constant flow system with a constant flow chiller
Q: How many control modes are relevant for an air conditioning system?
A: 3
Q: How many control modes are relevant for an air conditioning system?
A: 4
Q: How many control modes are relevant for an air conditioning system?
A: 5