In which systems can the calculated proportional differential pressure mode be used?
What are the three most important factors for a life cycle cost calculation for commercial buildings?
In the case story, which system is the most expensive?
Which element is the most expensive of them all?
What is the average payback time of installing a system with variable speed pumps?
In which systems can the measured proportional differential pressure used?
Test results
Q: In which systems can the calculated proportional differential pressure mode be used?
A: In systems where measurement of the differential pressure in the system is not an option and where the valve authority is more than 50%
Q: In which systems can the calculated proportional differential pressure mode be used?
A: In systems where measurement of the differential pressure in the system is not an option and where the valve authority is below 50%
Q: In which systems can the calculated proportional differential pressure mode be used?
A: In systems where the differential pressure is measured in the system and where the valve authority is below 50%
Q: What are the three most important factors for a life cycle cost calculation for commercial buildings?
A: Initial cost, operating cost and environmental cost
Q: What are the three most important factors for a life cycle cost calculation for commercial buildings?
A: Initial cost, maintenance cost and energy cost
Q: What are the three most important factors for a life cycle cost calculation for commercial buildings?
A: Initial cost, energy cost and downtime costInitial cost, energy cost and downtime cost
Q: In the case story, which system is the most expensive?
A: A system with constant flow and a single constant speed pump
Q: In the case story, which system is the most expensive?
A: A variable flow system with a single constant speed pump
Q: In the case story, which system is the most expensive?
A: A one pump system with variable flow and variable pump speed where the pump is put into calculated proportional differential pressure mode
Q: Which element is the most expensive of them all?
A: Initial cost
Q: Which element is the most expensive of them all?
A: Energy cost
Q: Which element is the most expensive of them all?
A: Maintenance cost
Q: What is the average payback time of installing a system with variable speed pumps?
A: Less than a year
Q: What is the average payback time of installing a system with variable speed pumps?
A: 1-2 years
Q: What is the average payback time of installing a system with variable speed pumps?
A: 2-3 years
Q: In which systems can the measured proportional differential pressure used?
A: Systems where the differential pressure is measured over the pump and the valve authority is below 50%
Q: In which systems can the measured proportional differential pressure used?
A: Systems where the differential pressure is measured in the system and the valve authority is below 50%
Q: In which systems can the measured proportional differential pressure used?
A: Systems where the differential pressure is measured in the system and where the valve authority is higher than 50%.