Submetering: Evolution, Technologies, Applications

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Submetering Evolution, Technologies, Applications
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Outline

• What is Electric Submetering?
• What are Smart Meters?
• Why Submeter?
• What to Submeter?
• Available Technology

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What is submetering?
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Submetering Alternatives

• Master Metering
• One utility meter for the entire building
• Direct Utility Metering
• The Utility Installs Meters and Manages Accounts
  for each Tenant
• Building Owner Loads have a Separate Utility
  Meter and Account

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Why Not Direct Utility Metering?

• Construction Costs vs Meter Costs
• Loss of Flexibility
• No Integration of Non-Utility Energy (Generator,
  Solar, Wind, etc)
• Little Added Value to Tenants

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What are Smart Meters?

• Tells You When Power is used, How Fast it is
  Consumed
• Remote Access to Data
• Most Smart Meters Provide Added Data that Details
  the Efficiency of the Particular Circuit.

vs.
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Reasons to Submeter

• Tenant billing Transfer Energy Costs

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Tenant SubmeteringIntegrating renewables (vs
direct metering)
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Reasons to Submeter
Building Management Control of Building Systems,
Moment to Moment.
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Reasons to Submeter
Energy Management Understanding Trends Over
Time. Acting on Data to Reduce Energy Use.
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Energy ManagementConservation programs
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Energy managementLoad shedding, curtailment,
demand response
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Submetering applications

• New construction Gut rehab Retrofit

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Available technologyIndividual meters
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Available technologyHigh density meters
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Available Technology Communications

• Wired
• Proprietary
• BMS interface (Modbus, BACnet, LONworks, etc)
• Ethernet
• Wireless
• Radio
• WiFi
• ZigBee
• Power Line Carrier
• Hybrid

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Available technologySoftware

• Proprietary
• Controls / BMS / BAS
• Third-party
• Energy management firms
• Energy consultants
• Reading and billing firms

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