What is a common method to integrate energy measurement into a BAS?

What is a common method to integrate energy measurement into a BAS?

• A. Submetering or building-level energy meters measuring kW/kWh and power factor.
• B. Installing more temperature sensors.
• C. Using only utility bills.
• D. Measuring only peak demand.

Answer: (A)

Measuring energy usage directly and continuously is essential for a BAS to manage energy effectively. Submeters or a building-level energy meter provide real-time electrical data—kW for instantaneous power, kWh for total energy over time, and power factor to indicate how efficiently electrical power is being used. This data lets the BAS monitor consumption by zone or system, set alarms for unusual usage, and automate controls to shave peak demand or shift loads to off-peak times. Having submeters enables precise energy accounting and targeted energy-saving actions. For example, you can see how much a specific floor or equipment group is consuming, compare performance over time, and verify the impact of changes like schedule tweaks or equipment upgrades. Power factor data helps identify situations where penalties or inefficiencies are creeping in, prompting corrective actions such as checking for harmonics, capacitor bank needs, or equipment issues. Other approaches don’t offer the same capability. More temperature sensors improve environmental control but don’t measure energy use. Relying only on utility bills provides only periodic, totalized costs with no insight into when or where energy is consumed. Measuring only peak demand misses the broader usage pattern and the opportunity to optimize throughout the day. So, the standard method to integrate energy measurement into a BAS is to deploy submeters or building-level energy meters that report kW, kWh, and power factor.

Measuring energy usage directly and continuously is essential for a BAS to manage energy effectively. Submeters or a building-level energy meter provide real-time electrical data—kW for instantaneous power, kWh for total energy over time, and power factor to indicate how efficiently electrical power is being used. This data lets the BAS monitor consumption by zone or system, set alarms for unusual usage, and automate controls to shave peak demand or shift loads to off-peak times.

Having submeters enables precise energy accounting and targeted energy-saving actions. For example, you can see how much a specific floor or equipment group is consuming, compare performance over time, and verify the impact of changes like schedule tweaks or equipment upgrades. Power factor data helps identify situations where penalties or inefficiencies are creeping in, prompting corrective actions such as checking for harmonics, capacitor bank needs, or equipment issues.

Other approaches don’t offer the same capability. More temperature sensors improve environmental control but don’t measure energy use. Relying only on utility bills provides only periodic, totalized costs with no insight into when or where energy is consumed. Measuring only peak demand misses the broader usage pattern and the opportunity to optimize throughout the day.

So, the standard method to integrate energy measurement into a BAS is to deploy submeters or building-level energy meters that report kW, kWh, and power factor.