1 Building Electricity Management Energy Monitoring + Ac/ve Energy Management = 10%- 40% energy savings 1
2 - CLEER is a non- profit energy consul4ng company and is statewide leader field of energy services to businesses, ci/zens, and en/re communi/es. - CLEER develops clean energy, improves energy performance of residen/al, commercial, and government buildings and works with fleets to reduce petroleum use. - CLEER also manages the award winning Garfield Clean Energy Program, manages numerous rebate programs funded by the Department of Energy, Governor s Energy Office the Department of Local Affairs and the Colorado Department of Public Health and Environment. 2
3 Quiz Please identify the wasted energy at this facility: (Good luck first you have to find the other 11 lost bills) 3
4 Simplify management of energy data: Put all your energy data in one place 4
5 GWS City Hall: Weekend Shutdown Saved $5000/yr - 46% per day reduc/on in electricity use on weekends began Dec Predicted savings aver 7 days was +/- 15% of the actual annual savings 46% 46% 5
6 Commercial Electricity Billing is more Complex than Residen/al Billing Many u/li/es have commercial- rates, where building electricity usage is measured and priced in two ways on every bill. 1. Monthly usage: measured in kilowa]- hours used (kwh ) - Cost per kwh at Town Hall has recently averaged $ Monthly demand: Peak demand of electricity during the highest 15 minute period in each bill cycle, measured in kilowa]s (kw). - Cost per kw for a Xcel commercial is $13 to $15 (varies seasonally) - Peak demand may only occur for 15 minutes, yet is billed for all 30 days Note: Commercial building meters differ from residen/al meters. Residen/al meters measure kwh only. Cost per kwh is typically $0.11.
7 Quiz: Do you know your daily usage each month? Do you know which date set your peak demand charge? Electricity demand charges are like speeding tickets. Energy Monitoring gives a big building a speedometer, but you must be sure someone is watching it!
8 Carbondale Recreation Center Phase II: Demand charge reduction $500/month savings! We linked grid demand data into HVAC controls. When the sun doesn t cover needs and demand exceeds 35kW, a portion of electric demand is eliminated (heat coils, 50% of air conditioning capacity 8
9 Work with building owners and facility managers to address both sides of the Energy Management Umbrella Energy Conserva4on Energy Efficiency Human Aspects of Energy Usage (no cost, low cost) Stairstep approach: - Educate - Engage (data!!) - Empower - Ins/tu/onalize - Ownership Lights HVAC Controls Bldg Shell Vehicles Self- Funded Upgrade? Performance Contract? Machines that use energy (3 30yr paybacks) Significant energy can be saved at minimal cost by crea/ng a culture of empowered energy conserva/on at all levels. Upgrades of inefficient equipment are important, but upgrades should not be the sole focus of energy managers A robust Measurement & Verifica>on plan is cri>cal to any energy management program! 9
10 Energy Monitoring: Cri4cal Tool for Managing Large Buildings PROBLEM - Most buildings run poorly. Energy costs are higher than they need to be. - Building managers rarely see u/lity bills and are oven untrained to tackle energy problems. ENERGY MONITORING OFFERS A SOLUTION - Analyze bill data and 15 minute data to find savings opportuni/es - Assist facility manager in understanding what the data means. - Work with the facility manager to improve building opera/on - Monitor live energy data to verify success within 24 hours - Use savings stream to invest in equipment upgrades 10
11 Good management is cri4cal to ensure vehicle charging costs are low at commercial buildings Fleet has 4 EVs, each drives 1,000 mi/month, has 4 Level 2 chargers (6.6kW each) Op/on 1. Charge any /me. This causes a new peak, 27kW higher than usual. $0.11/mi Op/on 2. Fleet sets EVs to automa/cally charge at night. $0.01/mile Chart shows building electric Demand in kilowaos (kw) Low overnight kw demand Op4on 1) Day4me charging of six EVs at 2:45pm on a hot day causes new peak of 117 kw for the month. Addi4onal cost on monthly bill could be $400. Cost per mile to drive the EVs could increase 10X = $0.11/mile Normal Peak Demand 90kW: caused by HVAC, computers, lights, etc. Op4on 2) EVs set to automa4cally charge at night. No new demand charge. EV driving = $0.01/mile
12 Why track your energy use? You can t manage what you don t measure Visualizing energy usage is key to finding waste Making energy bill data accessible is priority #1 Buildings are complex. EVSE adds another layer to building mgmt. Not just old facili/es new LEED facili/es need help too!! In God we trust, all others must bring data. W. Edwards Deming What to look for in a monitoring tool? Seek features you need to manage energy effec/vely U/lity bill tracking for mul/ple buildings in one place 15- minute energy performance data and alerts Accessible from anywhere by facility managers Look for Kiosk- compa/bility for community/customer engagement 12
13 Colorado Energy Navigator CASE STUDIES 13
14 Michael Ogburn, M.S.M.E Energy Engineer, CLEER