Hydronic system design – the elephant in the room

 

hydronic system design

HVAC systems consume nearly 50% of all energy in commercial buildings!

Yet in most commercial buildings the tools aren’t available to fully understand and manage the performance of heating and cooling systems – at a meaningful level – throughout the life of the asset.

  • Energy managers need energy data
  • Facilities managers need performance information
  • The board wants proof of efficiency

This is the elephant in the room – it is an uncomfortable fact that people are reluctant to acknowledge.

 

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The key to enabling the smarter management of hydronic systems is to provide access to just the right amount of information – not too much, not too little, just right!    

Douglas Norton, Business Support Manager, SAV Systems

 

Douglas Norton

Continuous monitoring – but how to go about it?

 

Determining manageable portions of information

The key to enabling the smarter management of hydronic systems is to provide access to just the right amount of information – not too much, not too little, just right!

For example, consider a speculative building where you know about the ‘whole elephant’ but at the design stage you don’t know how it will be divided up. Clearly the design needs to incorporate sub-metering; getting the level of sub-metering ‘just right’ is the key element. These are the possible options:

  • Metering each floor

Improves understanding of performance on the floor, but not at each terminal unit, also does not facilitate billing on floors shared by several tenants.

 

Metering each floor

 

  • Metering at each terminal unit

Expensive to install, implement and manage and generates unnecessarily high volumes of data.

 

Metering at each terminal unit

 

  • Metering zones of terminal units served by commissioning modules

Provides affordable visualisation of real-time system performance of heating and cooling systems at a meaningful (zone-by-zone) level and makes it easy to reconfigure zones as floor layouts change – just right!

 

Metering zones of terminal units served by commissioning modules

 

PICV module with ultrasonic meter

PICV module with ultrasonic meter

 

 

Ongoing commissioning with module meters

Ongoing commissioning with module meters