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© EnerNOC Inc. Data Driven Retro-Commissioning & Monitoring Based Commissioning Vivek Ghosh, Shane Russell September 12, 2012

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Page 1: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

© EnerNOC Inc.

Data Driven Retro-Commissioning &

Monitoring Based Commissioning

Vivek Ghosh, Shane Russell

September 12, 2012

Page 2: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Agenda

Introduction

Retro-Commissioning

– Steps & Best Practices

Monitoring Based-Commissioning

– Continuous CommissioningTM

– Data-Driven

Conclusions and Questions

Page 3: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

3

Agenda

Introduction

Retro-Commissioning

– Steps & Best Practices

Monitoring Based-Commissioning

– Continuous CommissioningTM

– Data-Driven

Conclusions and Questions

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4

Agenda

Introduction

Retro-Commissioning

– Steps & Best Practices

Monitoring Based-Commissioning

– Continuous CommissioningTM

– Data-Driven

Conclusions and Questions

Page 5: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Agenda

Introduction

Retro-Commissioning

– Steps & Best Practices

Monitoring Based-Commissioning

– Continuous CommissioningTM

– Data-Driven

Conclusions and Questions

Page 6: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Introduction to Commissioning

New Building Commissioning

The process of assuring that new buildings are designed and constructed

to meet the owner’s project requirements

Retro-Commissioning (RCx)

Testing and adjusting building systems to meet the original design intent

and/or optimize systems to satisfy current operational needs

Monitoring Based-Commisioning (MBCx)

Track BMS points in real-time to identify energy efficiency and operational

improvement opportunities as they occur

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Introduction to Commissioning

Commissioning Goals

Verify that the facility satisfies the owner’s functional needs

Ensure energy efficient operation

Improve space comfort and indoor air quality

Reduce O&M emergency calls

Page 8: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Retro-Commissioning

Planning Phase Pre-Investigation

Phase

Investigation Phase Implementation

Phase

Handoff Phase

Develop

MBCx Plan

Develop

Findings Log

Template

Kick-off

Meeting

Initial Site

Survey

Develop

M&V Plan

Evaluate/Calibrate

Existing Monitoring

System

Recommend

Additional Monitoring

Systems

Setup Sample

Trends/Collect

Sample Data

Assess Data Quality

Populate Findings

Log

Collect Baseline

Data

Establish Baseline

Conduct

Pre-Functional Tests

Update Findings Log

Conduct Functional

Testing

Update Findings Log

Support Client with

Implementing PFT

Improvements

Support Client with

Implementing FT

Improvements

Verify Improved

Operation

Update Findings

Log

Develop MBCx

Report

Develop Ongoing

Diagnostics

Complete Training

Develop MBCx

Systems Manual

Page 9: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Planning Phase – Key Actions

Request building

mechanical and

electrical construction

documents

Initial site survey

Measurement and

verification plan

RCx plan

Page 10: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Pre-Investigation Phase – Key Actions

Install/calibrate building

electric and BTU meters

Test EMS trending

capabilities

Assess data quality

Begin populating

findings log

Page 11: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Investigation Phase – Pre-functional tests

Ensure equipment

operates correctly in

isolation

Point-to-point testing

Common findings:

– Damper actuator

disengaged

– Supply fan VFD

operating in hand

– Miscalibrated

temperature sensors

Update findings log

Page 12: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Investigation Phase – Functional tests

Ensure EMS operates building systems as a whole in an

efficient manner while meeting occupant needs

Testing sequence of operations

Field based functional tests:

– Custom field tests designed to observe functional

performance

– Calibrate sample of VAV terminals

Trend based functional tests

– Sequence of operations verified through trends during

occupied usage

Page 13: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Investigation Phase – Functional tests

In field-based tests:

Adjustments are typically made by an operator at the

BAS workstation.

Actions are observed by commissioning team

member(s) at the equipment.

In trend-based tests:

Adjustments are primarily caused by the environment

and regular facility use.

Actions are monitored and then stored. The trend data

is then evaluated by the commissioning provider,

typically, at a later date

Page 14: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Implementation Phase

Implement measures

identified

Perform verification

testing

Perform measurement

and verification M&V

plan

http://www.energydesignresources.com

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Handoff and Training Phase

Develop ongoing

diagnostic test plan

Conduct onsite training

Update RCx Findings

Log

Update and submit final

RCx Report

Develop RCx Systems

Manual

Page 16: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Issues and Pitfalls: Planning Phase

Building drawings not available

Equipment data not available

Sequences of operation not available

System drawings not available

Energy metering equipment failed or non-existent

Page 17: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Issues and Pitfalls: Pre-Investigative Phase

Inadequate funds/resources to implement proper energy metering

Trend data analysis issues

– Inability to store data

– Limited ability to trend a large quantity of points

– Limited data storage capacity

– Inability to retrieve data

– BMS not capable of trending hardware or software points

Page 18: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Issues and Pitfalls: Investigative Phase

Problems arise during baseline energy monitoring phase

Resources not available to perform tests

Funds/resources not available to implement repairs to issues

identified in prefunctional tests

Trend data issues

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Issues and Pitfalls: Implementation Phase

Funds/resources not available to implement recommended

improvements

Resources not available to retest corrected/improved systems

Time not available to implement improvements due to program

constraints

Page 20: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Monitoring-Based Commissioning

… and delivered in detailed

energy dashboards and

scorecards with savings

recommendations

Thousands of data

points from throughout

the facility…

…. are collected and

analyzed by EnerNOC…

Data is captured at the meter and behind the meter, then software continuously looks for

equipment-level savings opportunities.

Page 21: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Walkthrough/Audit/RCx

Customized based on

customer need

Walkthrough is limited in

duration focusing on

simple O&M changes

Greatest value with full

Retro-Commissioning

– Sequence review and

pre-functional testing

provides greater insight

into systems

Page 22: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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MBCx Connectivity

22

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Equipment & Meters

BMS Integration

Connectivity

Meter Integration

Internet

Firewall

Network Data & Results

Query Gateway

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Baselining

Obtain Energy Data

Develop a predictive

energy consumption

profile

– Based on pre-

implementation phase

usage

– Select relevant

independent variables

Track usage with

respect to baseline

Page 24: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Fault Detection

Collect, store, analyze

BMS data on 5-minute

basis

Filters and diagnostics

automatically generate an

issues list

– Analyst able to further

investigate and quantify

issue

Page 25: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Workflow for Energy Efficiency Measures

25

EnerNOC

Review &

Validation

Engineering

Analysis

Monthly

Scorecard

Review

M & V

• SiteSMART alerts

analysts based on

Automatic Filters

• Dedicated analyst

reviews issue and,

if appropriate,

creates EEM

• EEM is explored

and sized for

energy and $

savings impact

• EEM is presented

to customer for

approval

• Continuous

monitoring of EEM

to ensure savings

• If EEM is due to

fault, verification

that fault is fixed

• Rejected

• Under Review

• In Progress

• Implemented

Page 26: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Common EEMs: Scheduling

Programming change

caused fan to be

enabled 24/7

Large savings from

reducing energy spend

– Fan energy

– Chilled water

– Heating hot water

fan speed

fan status

Page 27: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Common EEMs: Leaky CHW Valve

Supply temperature

below setpoint

Mixed air cooled

approximately 10° F

when CHW valve closed

Increased occupant

comfort

Chilled water and reheat

savings

Page 28: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Common EEMs: Simultaneous Heating &

Cooling

Valves open

concurrently

– No humidity control

Improper sequences

lead to excess

heating/cooling

Lockout valves such

that only one is

modulating

hot water

valve

Simultaneous

heating &

cooling

chilled water

valve

Page 29: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Common EEMs: Economizer Leakage

MAT does not follow OAT

when outside air damper

position is fully open

Return air leaking into

mixed air plenum

Faulty Sensors

– Check during RCx

portion

Page 30: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Deliverables – Efficiency Scorecard Opportunities are summarized in a regular report so that the user can focus on the

highest value opportunities that fit into the capital budgeting process

Page 31: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Implementation

• Common picture of overall energy use

• Actionable insight for the on-the-ground team

• Ready identification of energy efficiency opportunities

• Management of all measures to completion or disqualification

• Continuous M&V of Persistent Commissioning measures

Reduce energy consumption

Prioritize maintenance issues

Enhance occupant comfort

Page 32: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Issues and Pitfalls: MBCx

Understanding/defining points on customer’s BMS

Low points count on BMS

– Fault detection is limited with fewer BMS points

Limited resources to implement measures

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Years

10%

20%

30%

0

Pe

rcen

t o

f E

ne

rgy W

aste

d

Impact of Commissioning

Source: Lawrence Berkeley National Lab, Benchmarking Analysis of monitoring-based commissioning

1 2 3 4 5 6 7 8

Cxa Savings

RCx Savings

MBCx

MBCx

Savings

RCx and Insight can combine to deliver up to 30% savings

Page 34: Data Driven Retro-Commissioning & Monitoring Based ...presentation.pdfData Driven Retro-Commissioning & Monitoring Based Commissioning ... Retro-Commissioning (RCx) Testing and

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Vivek Ghosh

Energy Engineer

275 Sacramento St., Suite 300

San Francisco, CA 94114

(415) 490-0550

[email protected]

Shane Russell

Senior Manager of Engineering

500 Ygnacio Valley Rd., Suite 450

Walnut Creek, CA 94596

(925) 826-1603

[email protected]