Integrated Energy Retrofits Replicable Case Studies to go. BEYOND Title 24

Transcription

1 Integrated Energy Retrofits Replicable Case Studies to go. BEYOND Title 24

2 What is an Integrated Energy Retrofit? The best way to improve the energy efficiency of a building is by taking a holistic approach to energy projects and financial measures to achieve an optimal result. 2

3 IER in five simple steps Identify Opportunities Set Target Evaluate Concepts Create Packages Implement Projects Measure Success & Continue to Improve 3

4 Three examples 4

5 Step 1 Set the baseline and your target! Identify Opportunities Evaluate Capital Projects Review current capital projects Review timing and priorities Sort projects by energy impact potential Perform Comprehensive Energy Study Use qualified energy engineers to review all aspects of building energy consumption: Create Baseline Model Create equest energy model against which potential projects can be compared Conduct Theoretical Minimum Energy Workshop Facilitated workshop to develop energy project concepts: Owner Manager Brokers Marketing personnel Community Government Tenants Visitors 5

6 Comprehensive energy study ASHRAE Level 2 Audit Evaluation of equipment condition Review energy consumption and comparison of energy use intensities to norms End use analysis - major systems/processes Identification and quantification of costs and benefits of energy conservation opportunities Recommendations for implementation Completion of ASHRAE forms Review makeup air compliance Comprehensive, Integrated Study Building envelope Tenant plug loads Lighting HVAC BMS Etc.

7 Theoretical Minimal Energy (TME) Workshop Open to new ideas even those that seem impossible Not: won t work, but didn t work because One conversation at a time! Encourage one another s participation Build on others ideas combining or adding to ideas need not imply criticism Think across disciplines Have a beginner s mind Question assumptions

8 Theoretical minimum energy approach Annual Energy Use EEMs Current Energy Use Technical Potential Implementable Minimum

9 TME workshop results potential projects CONTROLS DCV Improved SOO Adjust temp set points Optimized controls for VFDs and equipment HVAC Ventilation strategies -modulate Heat source - eliminate steam Separate loading docks with air curtains Minimize chillers Optimize chillers Combine chiller plants Best Practice - technology strategies, modular chillers Utilizing condenser water VFDs for air and water side equipment Smaller units for low-volume days Solar thermal for DHW Reduce static pressure by reducing CFM within new AHU's - Heat recovery with ice rink Thermal storage 6x electric substations - air to hot water heat recovery - generate DHW Replacement of transformers with high efficiency models Use of the currently dumped steam condensate Capture heat lost Reduce sewer charges and reduction of potable water use Use domestic grey water to cool the condensate Use groundwater (de-watering) for cooling tower make up INTERIOR LOADS Alternative Lighting strategies LED, Plasma, ambient to flush surfaces, daylighting, Eliminate incandescent Dimming Occupancy/Vacancy sensors Outside lighting - convert to LEDs Elevators/escalators - variable motors, shutdown strategies Window film or alternative shading strategies FUTURE EEMs Increasing economizer operation More temperature sensors Spot and supplemental cooling Kiosk and educational demonstration on carbon reduction More training for BMS users Operate building passively Daylighting and Ventilation - combine Pipe de-watering to irrigation Exhibitor Standards - incentives, submetering, carbon footprint documentation Exhibitor design guidelines Additional daylighting for conference rooms - clerestories Smart meters and sub-metering strategy Re-zoning to improve over heating/cooling Sidewall diffusers for permanent walls Natural ventilation in lobbies More efficient kitchen equipment New roof with high SRI, Source all energy from non-carbon producing sources Eliminate steam

10 Step 2 Process of elimination Evaluate Concepts Estimated Costs Calculate potential costs for each project identified in the Energy Workshop Model Each Concept Plug each idea into equest to generate model Calculate ROI Perform financial analysis on each project to determine Return on Investment Measure Energy Impact Calculate energy impact of each concept, including estimated greenhouse gas emissions

11 The Business Case integrated approach 60,000,000 Energy Savings: Base Building vs. within Tenant Space Annual Energy Savings (kbtu) 50,000,000 40,000,000 30,000,000 20,000,000 10,000,000 0 Retrofit Chiller Balance of DDC Measures that only affect the Base Building Tenant DCV Radiative Barrier Tenant Energy Management Bldg Windows VAV AHU's Tenant Daylighting/ Lighting/Plugs Measures within Tenant Space

12 Tenant spaces Enhanced work environments are created Better thermal comfort resulting from better windows, radiative barrier, and better controls; Improved indoor air quality resulting from DCV; and Better lighting conditions that coordinate ambient and task lighting. Positive ROI Tenant Prebuilt Program and Design Guidelines

13 Step 3 Review integrated options Create Packages Parametric Runs Use equest to plot tradeoffs of each project between cost and energy impacts Calculate NPV/CO2 Savings of 3 to 5% yearover-year with low and no cost opportunities Savings can reach 20 to 30% or higher with capital for energy efficiency investments Reduces capital expenditures and manages utility cost risk Develop/Select Energy Packages Assemble concepts into 4 optimal models to evaluate Select the final package Energy Performance Contract For selected package, scope out costs and performance indicators. Create contract for JLL to implement IER program, including performance measures 13

14 Balance financial return & carbon reduction A solution that balances CO 2 reductions and financial returns is in this range. There are diminishing (and expensive) returns for greater efficiency.

15 Chicago Union Station Green Globes (Phase I) provided an intensive overview of sustainability picture and opportunities for improvement Phase II energy audit provided a deeper dive into conservation opportunities specific to electricity/gas/steam consumption Union Station had unique combination of existing fixed infrastructure elements and core and shell project(s) underway ==== Energy model assisted in analyzing energy consumption from multiple perspectives and provide anticipated results from the combination of existing and future

16 ECM - assumed best bundle ECM #1 Demand Control Ventilation Strategy ECM #2.1 Chiller Capacity Reduction (one 750-ton chiller) Consider utilizing one 750-ton chiller in lieu of two OR ECM #2.2 Chiller Capacity Reduction (two 500-ton chillers) Consider utilizing two 500-ton chillers in lieu of two 750-ton units. ECM #3 Great Hall Skylight Improvement Consider applying tinted film to entire Great Hall skylight to reduce Shading Coefficient by 50% (SC=0.35). ECM #4 Daylighting Control Strategy ECM #5 50% Roof Replacement Consider 50% of the roof as new with an R-value of R-25 ECM #6 Window Replacement Consider all window systems on the 2nd and 3rd floor as new/modified with a U-value of 0.31 and a Shading Coefficient of It is also assumed the new/modified window systems will reduce infiltration by 25%.

17 Recommendations moving forward Perform low cost/best practices in conjunction with infrastructure improvements Perform ECMs which show less than 5 year payback Assign JLL personnel as site energy manager. Primary responsibility will be to ensure execution of best practices, initiatives, and infrastructure improvements are in line with results from energy model Much of the window and roof replacement is in the works. Use JLL assigned energy manager to assess net effects of various design considerations as they are considered

18 Step 4 Reality Implement Projects Plan/Design Budget/Schedule Bid & Award Implement Create IER plan, including timeline Create drawings and specifications Finalize budget Establish work schedule Coordinate project bidding and contract awards Oversee installations, process changes, training and project commissioning 18

19 Implementation example insulation installation RADIATIVE BARRIER: Install insulated reflective barriers behind radiator units located on the perimeter of the building.

20 Implementation example window retrofit WINDOWS: Remanufacture existing insulated glass units (IGU) double-hung windows to include suspended coated film and gas fill.

21 Implementation example chiller plant retrofit CHILLER PLANT RETROFIT: The chiller plant retrofit project can include the retrofit/replacement of existing chillers in addition to upgrades to controls, variable speed drives, and primary loop bypasses.

22 Step 5 Assure performance through metrics Measure Success Measure & Verify An employee communications and change management program Provides educational services Improves the knowledge of CRE/FM employees in energy and sustainability Administer Performance Contracts Accelerates company sustainability goal, such as reducing carbon footprint with employee participation Annual Model Reconciliation Our experts have a combined knowledge of green building practices and employee change management delivered via our training program Sustainability University 22

23 Integrated Energy Retrofit M&V + CCx Your buildings are talking Are you listening? IntelliCommand July 2013

24 Service deliverables Measurement & Verification Performance -based lining EnergyAnalysis Identify & Qualify Track, measure & verify Commissioning Methodology Examine optional parameters Implement Measures Identify Changes Fault Detection & Diagnosis Carbon FootprintAnalysis

25 Dashboards

26 NEWLY COMMISSIONED LEED PLATINUM FACILITY Improvement in Demand -Equipment Running out of Occupancy Continuous Commissioning -Simultaneous Heating & Cooling -Sensor Out of Range -Humidifier Active Out of Occupancy Total potential savings (December 1, 2012 February 28, 2013) $ 9,996 (109,384 kwh) Approximately 6% of utility spend 2012 Fault Detection & Diagnosis -VFD Control Logic Failure -Space Temperature Deviation Full Utility Audit Discrepancies found in meter data from site and billing

27 IntelliCommand Clients

28 Does IER work?

29 IER process identified 8 integrated improvements Window Retrofit: Refurbishment of approximately 6,500 thermopane glass windows, using existing glass and sashes to create triple-glazed insulated panels. Radiator Insulation Retrofit: Introduction of insulation behind radiators to reduce heat loss and more efficiently heat the building perimeter. Tenant Lighting, Daylighting and Plug Upgrades: Improved lighting designs, daylighting controls, and plug load occupancy sensors in common areas. Air Handler Replacements: Replacement of air handling units with variable frequency drive fans.

30 IER process identified 8 integrated improvements Chiller Plant Retrofit: Reuse of existing chiller shells while removing and replacing guts to improve chiller efficiency and controllability, including new variable frequency drives. Building Control System Upgrade: Upgrade of existing building control system to optimize HVAC operation and more detailed sub-metering information. Ventilation Control Upgrade: Introduction of demand control ventilation in occupied spaces. Tenant Energy Management Systems: Individualized, web-based power usage systems for each tenant.

31 Bottom line $20M IER program goal Reduce energy use by 38 percent Produce annual savings of $4.4M Reduce carbon emissions by 105,000 metric tons over the next 15 years Be funded through energy and operational savings Be completed within two years Serve as a sustainability icon in the NY market

32 IER success stories Empire State Building NYC Union Station Chicago Grand Central Station NYC Lincoln Center Campus NYC Moscone Center San Francisco Merck 4 buildings (MA, NJ, PA, NC) Bank of America Hopewell campus Worldwide Plaza NYC Pfizer Headquarters NYC Deutsche Bank 60 Wall Street NYC 80 Park Avenue Worldwide Plaza 32

33 IER success stories 12 buildings for BofA 1333 Broadway 1350 Broadway 1359 Broadway 250 East 57th street 60 East 42nd street 112 West 34th street 1440 Broadway Pfizer HQ (phase I) 100 Bank Street 500 Mamaroneck First Stamford Place Metro Center 33

34 Practical Next Steps 1. Triage your building portfolio based on renovation cycle/portfolio strategy 2. Create a Sustainability Master Plan including retrofit projects, design standards, lease structure changes, tenant energy management programs, marketing initiatives, employee programs and corporate strategy 3. Commit to an integrated, whole-building retrofit approach: Conduct whole-building audits rather than single measure projects 4. Require performance guarantees with ongoing measurement and verification of savings to reduce risk and maintain performance 5. Engage tenants, employees, building occupants and vendors in energy savings efforts through training, tools and technology 6. Continue to improve by creating the proper culture and processes 7. Promote and reward success!!

35 Integrated Energy Retrofit Value Creation Initiative For more information: Mary Curtiss Senior Vice President Director Energy & Sustainability Jones Lang LaSalle