Buildings Energy Efficiency & Energy Audit...Energy Audit # Only applicable to central BS installations of commercial buildings and commercial portions of composite buildings • The

Buildings Energy Efficiency

& Energy Audit

Telemax Environmental and Energy Management Limited

Ir Eagle Mo

Contents 1) History of HK Energy Audit 2) Energy Audit in Other Contraries 3) Energy Audit Code (EAC) 4) Case Study


1) History of HK Energy Audit


What Are Energy Audits? Performing an energy audit is a crucial step to assessing and

improving energy efficiency. There are many types of energy audits that can be performed at water and wastewater treatment facilities, ranging from general 'walk-through audits' to more comprehensive 'process audits.

Enhancement of Energy Efficiency in Buildings

l  Total annual electricity consumption of HK in 2009: about 41.5 billion kWh (equivalent to the consumption by 9 millions of families annually)

l  About 90% of the electricity consumed by buildings l  Enhancement of buildings energy efficiency will be an effective means

to reduce energy consumption

Energy Consumption by Sectors in 2009 Hong Kong Energy End-use Data 2011

The Hong Kong Energy Efficiency Registration Scheme for Buildings (HKEERSB)

u  Launched since 1998 to promote the voluntary compliance with

BEC to enhance building energy efficiency

u  Up to Dec 2011, around 1,300 buildings have been registered

u  Registered buildings included commercial, industrial and

residential buildings

u  Participation rate of the private sector is very low (only around

30% of the registered buildings)

Mandatory Implementation of Building Energy Code (BEC)

•  As voluntary compliance with a higher energy efficiency standard appears not to be forthcoming in Hong Kong and amidst the growing environmental concerns, Government consider it an opportune time to pursue mandatory implantation of the BECs to accompany market

•  In order to combat climate change, mandatory implementation of minimum energy efficiency standard in buildings by legislation has been widely adopted by overseas and Mainland China driven changes

•  The mandatory BEC is formulated with the existing voluntary BEC 2007 Edition as the blueprint

Milestone of the Buildings Energy Efficiency Ordinance (BEEO)

21/03/2011 Registration of Registered Energy Assessors (REA) came into operation

03/12/2010 BEEO was gazetted

21/09/2012 BEEO will come into full operation

11/2010 01/2011 03/2011 05/2011 07/2011 09/2011 11/2011 01/2012 03/2012 05/2012 07/2012 09/2012 11/2012

Structure of Legislative Framework

Buildings Energy Efficiency Ordinance (BEEO)

Buildings Energy Efficiency (Fees)

Regulation

Buildings Energy Efficiency (Registered Energy Assessors)

Regulation

Energy Audit Code

(EAC)

Building Energy Code

(BEC)

Code of Practice

Control Regimes

1) Newly constructed buildings will be required to comply with the minimum energy efficiency standards and requirements as specified in BEC under BEEO

2) Existing buildings will be required to comply with BEC only when major retrofitting works are carried out

3) Commercial buildings and commercial portions of composite buildings will be required to carry out energy audits in accordance with the technical requirements as specified in EAC under BEEO

Control Regimes (cont’d) Different regulatory mechanisms for “newly constructed building after the commencement of the legislation” and “existing building before the commencement of the legislation”

Newly constructed building after the commencement of the legislation – Buildings having obtained the consent to the commencement of building works for superstructure construction from Building Authority after the legislation comes into full operation (i.e. 21 Sep 2012)

Existing building before the commencement of the legislation – Buildings that have obtained the consent on or before the legislation comes into full operation (i.e. 21 Sep 2012)

*Remarks: The abov e two terms are for publicity purpose only and do not appear in BEEO.

Energy Audit

Ø  Only applicable to central BS installations of commercial buildings and commercial portions of composite buildings

•  The owner of a building is required to engage a REA to conduct Energy Audit every 10 years

•  The owner is required to obtain an Energy Audit Form and an energy audit report from the REA

•  The REA is required to submit a copy of Energy Audit Form and the energy audit report to EMSD for record

•  The owner is required to exhibit the valid Energy Audit Form in a conspicuous position at the main entrance of the building

2) Energy Audit in Other Contraries


Energy Audit in US

The American Society of Heating, Refrigerating and Air-Conditioning

Engineers (ASHRAE) refers to

benchmarking as a preliminary energy use analysis; this process involves collecting facility energy data, reviewing energy bills, and comparing the facility's energy consumption with similarly-sized facilities using similar processes. EPA’s Energy Star's Portfolio Manager is a free, on-line benchmarking tool. EPA recommends all facilities use Portfolio Manager or another benchmarking tool prior to completing a walk-through or detailed process audit.

Energy Audit in US

Walk-through (also called ASHRAE Level 1) audits provide a “first

cut” assessment of energy savings; they’re especially valuable to small utilities with simple production and distribution systems, and facilities that have never received an energy audit. While walk-through audits lack a detailed analysis of potential energy efficiency measures (and only sometimes include rough pay-back period estimates), they reliably include relatively simple and immediately affordable recommendations—such as changes in operation timing (based on utility rate schedules), and upgrades to lighting, heating, ventilating and air conditioning (HVAC), and pumping equipment. For a small facility, a walk-through audit can be completed in 2-6 hours by someone familiar with the system. A number of entitles have provided ‘Do It Yourself’ guidance to assist facilities in conducting their own walk-through audits.

Energy Audit in US

Detailed process audits (also called Level 2—or, if more refined—

Level 3 ASHRAE audits) require a more in-depth conversation between the facility and professional auditors experienced in water and wastewater systems. Detailed process audits are the most cost-effective for mid-size and large facilities that lack in-house time to investigate energy efficiency opportunities, and that have not recently received an energy audit. Detailed process audits often involve equipment field tests, inventorying equipment energy performance data, creating energy profiles for equipment and systems, discussing potential O&M changes, and evaluating potential energy efficiency and renewable energy projects. Detailed process audits provide comprehensive information on the pay-back periods associated with the recommended measures.

Telemax Environmental and Energy Management Ltd 特立美環保及能源管理有限公司

3) Energy Audit Code (EAC)


Code of Practice for Building Energy Audit


Briefing on Energy Audit

-The Buildings Energy Efficiency Ordinance Cap 610 (the Ordinance) which is to come into full operation from 21 September 2012 onward. BUILDING THAT REQUIRE ENERGY AUDIT: 1. Commercial Building. 2. A portion of a composite building that is commercial use.

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Briefing on Energy Audit

SCHEDULE OF THE FIRST ENERGY AUDIT:

Date of issue of occupation approval in respect of

the building

Period within which the first energy audit must

be carried out

On or after 1 January 1988 12 months from the commencement of Part 4 of this Ordinance

After 1 January 1978 but before 1 January 1988

24 months from the commencement of Part 4 of this Ordinance

After 31 December 1969 but before 31 December 1977

36 months from the commencement of Part 4 of this Ordinance

On or before 31 December 1969 48 months from the commencement of Part 4 of this Ordinance

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EAC Requirements

Key Steps

1. Collection of information

2. Review of energy

3. Identification of EMO

4. Cost benefit analysis of EMO

5. Recommendations

6. Compiling energy audit report


Scope

-  Energy audit carried out for the central building services installations.

4 Key types of central building services installations i)   Air-conditioning installation ii)   Electrical installation iii)   Lighting installation iv)   Lift and Escalator installation

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Scope

-  Step 1: Data Collection and Review ü  Information on building operation & technical characteristic of various energy

consumption were collected. ü  Equipment type ü  Quantity ü  Power consumption ü  Running schedule

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Scope

-  Step 1: Data Collection and Review (cont’)

ü  General Building Plan ü  Occupancy Permit ü  GFA of the building ü  Retail Area

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�  Owner of building

Owner of Building

Company:

Address:

Tel:

Fax:

Representative of Owner of Building

Company:

Contact Person: (Eng)

(Chinese)

Position in the company:

Address:

Tel:

Fax:

Email:

Scope

-  Step 1: Data Collection and Review (cont’)


Scope

-  Step 2: Review of Energy •  The monthly and annual energy consumption of the building will be

calculated

ü  Site survey will be conducted with E&M plant operators and engineers. -  Confirm the equipment type -  Confirm the equipment quantity -  Confirm the equipment power consumption

25


Scope

Step 3: Identification of EMO Example:

•  Replacing existing inefficient electrical equipment •  Replacing lower COP chillers •  Install occupancy sensors

26


Scope

-  Step 4: Cost benefit analysis of EMO

-  Cost benefit and payback period will be provided if major BS equipment are being recommended to replace.

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Scope

-  Step 5: Recommendation

ü Recommendation for the energy improvement work in the next few years will be provided to the owner for their consideration.

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Scope

-  Step 6: Compiling Energy Audit Report ü  Energy audit report include:

•  building information, •  findings, •  scope of audit, •  description of operating characteristics, •  recommendations and •  EMO. •  Appendix (calculation summary)

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EAC Requirements

•  Energy audit report •  Energy utilization index (EUI) (MJ/m/

annum)

•  Energy audit form (exhibit at building main entrance)

•  Energy management opportunities (EMO)

–Implementation not mandatory


4) Case Study



Energy Audit Example

Chiller System – Identify Energy Consumption and its Efficiency

AHU / PAU System

Energy Audit Example 2

Lighting System Identification

Electrical System

Energy Audit Example 3

Elevation System – Identify Power and Efficiency



Required information - Energy Bills

� Energy Bill in Excel format for 36 months



Required information – Equipment Schedule (1)

� Equipment schedule with type, quantity, rating and power consumption



Required information – Equipment Schedule (2)

� MVAC – Chillers, chiller pump, AHU/PAU, FCU, exhaust fan

� Lighting Schedule

� Lift and Escalator



Required information - Operation Schedule

� MVAC equipment

� Lift and Escalator

� Lighting



Required information - Site Layout

�  Layout in PDF or CAD format with dimension

�  GBP



Required information -Administrative Information (1)

� GFA of the building

� Retail Area




� Occupancy Permit




� Owner of building Owner of Building

Company:

Address:

Tel:

Fax:

Representative of Owner of Building

Company:

Contact Person: (Eng)

(Chinese)

Position in the company:

Address:

Tel:

Fax:

Email:


END

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Buildings Energy Efficiency & Energy Audit...Energy Audit # Only applicable to central BS installations of commercial buildings and commercial portions of composite buildings • The