Retro-Commissioning and Optimization of Building … and Optimization of Building Operation 17 November 2016 1 CONTENTS 1. Needs for Retro-Commissioning (RCx) 2. Retro-Commissioning

Retro-Commissioning and Optimization of Building Operation17 November 2016

1

CONTENTS

1. Needs for Retro-Commissioning (RCx)

2. Retro-Commissioning (RCx) Definition and Scope

3. Key Factors for Successful Implementation of RCx in HK

4. Upcoming Trend for Retro-Commissioning

5. Conclusion

2

Section 1 – Needs for Retro-Commissioning (RCx)

3

Stock Distribution of Private Offices(11,060,700 m2 at end 2014)

Stock Distribution of Commercial Buildings(10,917,200 m2 at end 2014)

Source: Hong Kong Property Review 2015, Rating and Valuation Departmenthttp://www.rvd.gov.hk/en/publications/hkpr.html

Buildings constructed before 1989 (>25 years old)

Private office ~4.4 million m² or ~40% of total

Commercial buildings ~7.1 million m² or ~65% of total

EXISTING BUILDING STOCK

4

Source: Hong Kong Property Review 2015, Rating and Valuation Departmenthttp://www.rvd.gov.hk/en/publications/hkpr.html

EXISTING BUILDING STOCK (CONT’D)

5

EXISTING BUILDING STOCK (CONT’D)

6

RCx is one of the key initiatives to

promote energy saving for existing

buildings as stated in the energy

saving plan

7

RCx INITIATIVE UNDER ENERGY SAVING PLAN

Section 2 –Retro-Commissioning (RCx) Definition and Scope

8

With reference to US Department of Energy,

Retro-Commissioning for existing building, is a systematic investigation process for improving and optimizing the Operation & Maintenance of building equipment and systems for saving the overall energy consumption and lower energy bills.

Existing Buildings cover those which were built for years or have undergone renovation.

9

RETRO-COMMISSIONING (RCx) DEFINITION

Optimizing the system and operation efficiency by:

a. Acquisition and analysis of the operational data, such as outdoor /

indoor conditions, on-off schedule, sequences of operation, trend log,

energy consumption record / data, etc.

b. Tuning system / control induced by renovation works and/or changes in

loading profiles over time, drift in control set points;

c. Improving the accuracy / sensitivity of sensors or controllers;

d. Optimal maintenance strategy

e. Fully utilization of the design provisions (e.g. building management

system, free cooling etc.)

10


Planning InvestigationImplementation and Handover

Post Handover

Stage 1 Stage 2 Stage 3 Stage 4

11


Section 3 –Key Factors for Successful Implementation of RCx in HK

12

1. Recognition by Building owners, Facility Management Staff, etc. on RCx’s

value

2. Technical guidance e.g. models and tools and proforma specification

3. Service providers and experienced practitioners for RCx implementation

4. Training for RCx

13

KEY FACTORS FOR SUCCESSFUL IMPLEMENTATION OF RCx IN HK:

Section 4 –Upcoming Trend for Retro-Commissioning

14

UPCOMING TREND FOR RETRO-COMMISSIONING

Before Connected – Unplanned Service Impact

15


Before Connected – Time and Cost are High

TIME TO RESOLUTION: 24-48+ hours

COST: $$$$$

DISRUPTION TO FACILITY: High

16


Before Connected – Long Labor Time

17


18


Big Data relates to data creation, storage,

retrieval and analysis that is remarkable in

terms of volume, velocity, and variety.

Cloud ComputingIntegration Building Services Systems

19


Intelligent Buildings

20


After Connected

• Connected Service• Long Term Data Storage• Professional Team Support• Health Report

Router

Cloud Computing Strategy• Achieve economies of scale• Deliver BS systems that are flexible and

responsive to demand• Take advantage of new technologies in order

to support various activities• Meet environmental and sustainability targets• Provide an open platform to allow client to

hook new emerging future BS applications

Building Services Equipment

21


Area Zone 1 Area Zone 2 Area Zone 3 Area Zone 4 Area Zone 5 Area Zone 6

Smart Centre 1 Smart Centre 2

Smart Centre centralized energymanagement through real-time monitoring

22

Smart Centre


Smart Centre Advantages:

23

Transparency on energy use

Real-Time monitoring

Customization of the solutions

Simplicity to measure

sustainability efforts

Usefulness of the energy data

management software

Detailed analysis of complex

building

System Health Checking

Easy Access to data

Support and training on the

tools used


BMS Server

Database Server

Cloud Database

- Alarm- Measurement- Energy- Operation Status

System Health Checking

- Monitor

- Detect

- Diagnose

- Identify faults

- Identify energy

wastage

24


Critical alarms are sent in case of any fault

Operating data is sent to the cloud for storage and analysis

Analytic reports are generated for system health check

Operating and trend data can be easily accessed

CLOUD-BASED ANALYTIC PLATFORM

TECHNICAL SUPPORT

25


System Health Checking & Diagnostics

Use all 4 approaches in combination to provide the best outcome

1. Alarming to identify critical issues

2. Rules to identify common performance issues caused by deteriorating conditions

3. Performance indexing to proactively plan for maintenance and repairs

4. Statistics to adjust rule and performance thresholds and to identify optimization opportunities

26


System Health Checking & Diagnostics

Central Chiller Plant Performance

Trouble Shooting

Energy Report

Automated System Health Checking

27

Section 5 –Conclusion

28

CONCLUSION

Past• Over 90% buildings

age more than 10 years

• Most of buildings lost 30% efficiency in the first few years

Present• RCx systematic

process to periodically check building performance

• Energy Saving Scheme

Future• Smart Centre for

central monitoring• Automatic System

Health Checking• Easy access• Various report types

are provided• System self

adjustment and optimization

29

30

Documents

Retro-Commissioning and Optimization of Building … and Optimization of Building Operation 17 November 2016 1 CONTENTS 1. Needs for Retro-Commissioning (RCx) 2. Retro-Commissioning