energy modeling with equest - aee new england · with equest aee presentation april 7th, 2014 dana...
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Energy Modeling with eQUESTAEE PresentationApril 7th, 2014
Dana Etherington, PE, CEM, LEED AP BD+CCRB Consulting Engineers
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Benefits to Energy ModelingØ Catalog site energy spend per building benchmark to global
networks Ø Utilize for ongoing commissioning efforts (OCx)Ø Target specific Energy Conservation Measures (ECMs) with
best return on investmentØ Quickly develop detailed energy saving numbersØ Get “buy-in” from investors on capital projectsØ Incorporate savings +/- % ranges for financial analysisØ Create living record of building systems and operations
The models can be re-used again and again
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Case Study – Campus Modeling
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Facility DescriptionsBLDG. # TYPE AREA (SF) HVAC
8201 Warehouse / Data Center 10,500 Unit Heaters, CRACs
8200 Mixed-use Offices / Labs 30,000 VAV / CAV, CHW / HW
8900 Modular Offices 8,000 Heat Pumps
8100 Main Manufacturing 156,000 VAV, CHW / HW
8400 Utility Building 24,000 Unit Heater
8700 New Manufacturing 400,000 VAV, CHW / HW
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Modeling Process1) Previous Model, 8201 was obtained from prior year (EMA)2) Second model, 8200 / 8900 was built & obtained from EMA3) Third model, 8400 / 8100 was built by CRB4) Fourth model, 8700 was built by CRB (started by client)5) All models were prepped to be combined
a. Unique names applied to circulation loops, systems and other parameters
b. Naming convention updated to be unique (floors, spaces, zones)c. Coordinate parameters were created for locating buildings
6) Campus model was created and calibrated to site utility bills
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Combined Campus Model
Utility Building 8400
Building 8700
Building 8100
Building 8201
Building 8200
Building 8900
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Some Notes on Calibration, M&VGeneral Ø Metering and sub-metering allows for better diagnosticsØ Can directly monitor operational improvementsØ Metering can link up to energy models
Case Study ExampleØ Data points recorded every 30 minutesØ All of process / HVAC steam metered (several meters)Ø Process / HVAC CHW metered separatelyØ All chillers metered, including electric usage and loadØ All electric usage metered (several meters)
Metering was invaluable for model calibration
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8200 & 8900 Electric Calibration
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8200 & 8900 Gas Calibration
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8100 Initial Electric Calibration
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8100 Initial Steam Calibration
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8100 Final CalibrationØ Chiller performance curves were obtained from TRANEØ Chiller sequencing and load management controls were built
into the energy model to resemble operationØ Boilers were split to serve primarily HVAC loadsØ Steam generators were split to serve process loadsØ Additional controls modeled on air handling systems
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8100 Final Electric Calibration
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8100 Final Steam Calibration
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Campus Electric Usage Calibrationà 1.8% error
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Campus Gas Usage Calibrationà 6.5% error
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Keys to Success1) Collaborating between building owners and consultants2) Encouraging transparency with models and calculations 3) Working to link M&V and Modeling where possible4) Creating models that are living documents
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Contact InfoDana Etherington, PE, CEM, LEED AP BD+CSenior Energy EngineerCRB Consulting Engineers1 Kendall Square, Suite B2202Cambridge, MA 02139
Email: [email protected]: 617-475-3061Cell: 617-583-3009
THE RELENTLESS PURSUIT OF SUCCESS. YOURS.TM