1. FMANZ SUMMIT 2017 20-30% OF YOUR CURRENT ENERGY USE IS PROBABLY WASTE
JEREMY ALLEN, FOUNDER,
ENERGY SOLUTION PROVIDERS

2. Who Energy Solution Providers (ESP)
Specialising in the installation of high accuracy, automated remote metering systems
Across commercial, public, Industrial, retail and educational facilities New Zealand wide
Energy Solution Providers…
Specialise in the supply and installation of highly accurate, automated, remote, metering systems
This enables us to help businesses reduce energy usage and costs, and get NABERSNZ and other building ratings
has saved NZ businesses ~$22 million or 122 million kWh
is working with 50+ clients, across 500+ sites with nearly 6000 meters nationwide
up to 40% EECA funding for every monitoring project that we do
won the 2016 EECA award for Business Service Excellence

3. CASE STUDY SUMMARY BUILDING 1 BUILDING 2 YEAR BUILT - 2006
LOCATION - AUCKLAND
LOCATION – AUCKLAND
NLA – 15,100 m2
NLA – 16,030 m2
HVAC SYSTEMS DESCRIPTION:
AHU SUPPLYING VAV’s FOR AIR
AHU COOLING ONLY
VAV ELECTRIC RE-HEAT
CHILLED WATER COOLING
4 CHILLERS
FRESH AIR AHU DISTRIBUTED TO PERIMETER VAV’s
LOCAL TEMPERATURE CONTROL VIA FCU’s
HEATING FROM ELECTRIC RE-HEAT
3 CHILLERS: CONTROLLED STAGING IN RESPONSE TO DEMAND
BUILDING CONTROLS SYSTEMS - DELTA
BUILDING CONTROL SYSTEMS: TRIDIUM NIAGRA
BASELINE ENERGY USAGE: 3,754,420 kWh
CALCULATED BASELINE ENERGY USAGE: 3,104,672 kWh
BASELINE EUI: 248 kWh/m2
BASELINE EUI: 193 kWh/m2

4. BUILDING 1 – Issue 1 No Data
After installing 33 ESP Meters

5. ENERGY AUDITS/FD REVIEW BUILDING OPTIMISATION/ CCX
BASELINE YEAR
33 ESP METERS INSTALLED
ENERGY AUDITS/FD REVIEW
BUILDING OPTIMISATION/ CCX

6. KEY ISSUES – HEATING COOLING FIGHTING
Heating load operates throughout summer
Such issues are typical of a AHU-VAV reheat HVAC system. Cooling is prioritise at the AHU because VAV’s can reheat locally.
Bad set points and bad zoning exaggerates this problem
Identified the problem via metering, resolution via checking BMS operation and set points.
Try to make zoned and grouped units with consistent set points to eliminate fighting and unnecessary reheating

7. Building 1 – Results to date (5 years)
18%
$569,000
3,794,379 kWh

8. Building 2 – Summary BUILDING 2 YEAR BUILT - 2016 LOCATION – AUCKLAND
NLA – 16,030 m2
HVAC SYSTEMS DESCRIPTION:
FRESH AIR AHU DISTRIBUTED TO PERIMETER VAV’s
LOCAL TEMPERATURE CONTROL VIA FCU’s
HEATING FROM ELECTRIC RE-HEAT
CHILLED WATER COOLING
3 CHILLERS: CONTROLLED STAGING IN RESPONSE TO DEMAND
BUILDING CONTROL SYSTEMS: TRIDIUM NIAGRA
CALCULATED BASELINE ENERGY USAGE: 3,104,672 kWh
BASELINE EUI: 193 kWh/m2

9. BUILDING 2 - Project Overview
PREDICTED ENERGY CONSUMPTION
90 ESP METERS INSTALLED
ENERGY AUDITS/FD REVIEW
BUILDING OPTIMISATION/ CCX

10. BUILDING 2 – 90 meters NABERSNZ base build compliant

11. Immediate Findings 51% of the energy is used 7am-6pm M-F
49% consumed out of hours of which 19% from unoccupied weekends and 30% from unoccupied weekdays
Tenant Lighting 21% unoccupied consumption, 10% of total consumption and estimated annual cost $42k
Central Mechanical plant 19% unoccupied consumption, 19% of total consumption and estimated annual cost $38k
Tenant General Power 18% unoccupied consumption, 9% of total consumption and estimated annual cost $36k
Comms (UPS) 13% unoccupied consumption, 9% of total consumption and estimated annual cost $27k
Tenant Mech Power 11% unoccupied consumption, 5% of total consumption and estimated annual cost $22k
Chillers (Chiller1) 8% unoccupied consumption, 4% of total consumption and estimated annual cost $16k

12. KEY ISSUES – HOLIDAY SCHEDULES
Easter Weekend
Through the metering we can see a load reduction at the main incomer
Load profile on Lighting loads was only slightly lower than a normal day
Load profile on Mechanical hardly changed at all compared to a normal day
Load profile on General Power was similar to a weekend – this is a key indicator that the building was in fact mostly unoccupied.
Through this we determined that the holiday shutdown was not properly implemented at the building controls interface
Contractor was notified and the issue fixed
ANZAC Day
Main Incomer now looking like an unoccupied day/weekend
Lighting still has a high load on this day more investigation required
Mechanical load is similar to a weekend profile
Power load profile shows that the building was unoccupied

13. Building 1 – Results to date (12 months)
26%
$129,469
863,130 kWh

14. SUMMARY OF COMMON ISSUES
Problems from Day1
Pressures from the construction project
Specification and selection of plant equipment is often problematic from tender stage
Short Term Operation
Reactive maintenance
Changing tenants or space usage is fairly common
Often things that aren’t working are just switched to manual control just to get it working
Long Term Operation/degradation
As equipment age they lose efficiency
BMS equipment becomes obsolete (10-15 years)
Problems from Day1
Pressures from construction project such as time, cost, labour availability often means that there is not enough resources allocated to commissioning mechanical services and as such plant items are not optimally setup
Specification and selection of plant equipment is often problematic from tender stage. Tenders are either too specific and that drives up project cost, or too loose and enables low cost tenders to sneak in since they appear very attractive but may not be the most efficient
Short Term Operation
Reactive Maintenance – maintenance that react to complaints are often rectified without regard to energy management or optimal operation. Most often set points are adjusted in accordance to complaints and ends up being inconsistent across zones and units end up fighting/excessive reheating and re-cooling.
Changing tenants or space usage is fairly common. HVAC equipment might be replaced but if so they are rarely recommissioned as part of the entire building, or if not replaced then the equipment might not be suitable if the space usage is different from before.
Often things that aren’t working are just switched to manual control just to get it working. Equipment isolated from controls are rarely working efficiently as they can’t react to conditions.
Long Term Operation/degradation
As equipment age they are to lose efficiency. Most often valves start to leak and this imparts even more wasted energy into the system
BMS equipment becomes obsolete and can no longer replace faulty equipment or complete upgrades. This leads to a situation where there may be many different types of equipment in a building that cannot fully communicate, leading to limits in programming and affecting efficiency.

15. Energy Use Index kWh/m2*pa
EUI BENCHMARK
OPPORTUNITIES FOR IMPROVEMENT
SHOULD BE INVESTIGATED
GREEN 50
100
150
200
250
Energy Use Index kWh/m2*pa

16. -Accenture (What’s Wrong with Traditional Energy Management)
“50 percent of initial energy savings disappear within the first six to 12 months due to a lack of continuous monitoring, analysis and corrective action.”
-Accenture (What’s Wrong with Traditional Energy Management)