1
In which types of systems is the constant pressure mode used?
2
In which systems can the measured proportional differential pressure used?
3
Which element is the most expensive of them all?
4
What are the three most important factors for a life cycle cost calculation for commercial buildings?
5
What does LCC stand for?
6
What is the average payback time of installing a system with variable speed pumps?
Test results
Q: In which types of systems is the constant pressure mode used?
A: Systems where the valve authority is higher that 50% of the total pressure loss
Q: In which types of systems is the constant pressure mode used?
A: Systems where the valve authority is lower than 50% of the total pressure loss
Q: In which types of systems is the constant pressure mode used?
A: None, this control mode is outdated
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%.
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 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: What does LCC stand for?
A: Life Cycle Cost
Q: What does LCC stand for?
A: Long Cycle Cost
Q: What does LCC stand for?
A: Life Cycle Circumstances
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