a guide to energy efficient retrofits of office and hotel...

A Guide to Energy Efficient Retrofits ofOffice and Hotel Buildings

AN INTRODUCTION

Background

Business Environment Council’s core mission is to identify practical means for business to address environmental concerns and to improve the overall environmental performance and competitiveness of Hong Kong.

With climate change being a fundamental environmental challenge, seeking to reduce carbon emissions is core to our work. The challenge is substantial considering the Paris Agreement’s overarching objective of net zero emissions in the second half of the century, supported by the Hong Kong SAR Government. Achieving this cost effectively involves not only cutting the carbon intensity of energy generation but also reducing energy demand.

Critical to reducing demand is improving the energy efficiency of buildings. The Government highlights in its Climate Action Plan 2030+, that buildings are the largest energy consuming sector. Buildings account for 90% of electricity consumption and over 60% of greenhouse gas emissions in Hong Kong, with the remainder essentially from transport and waste.

This Guide focuses on retrofitting existing commercial buildings, in particular offices and hotels, to which more than more than 60% of Hong Kong’s electricity usage and over 30% of Hong Kong’s carbon emissions can be attributed. Considering the large number of existing buildings with a long lifespan ahead of them, retrofitting those buildings cost effectively is important. As this Guide shows, many actions can be taken with net cost savings – in effect with no net cost to the business - and with short payback periods. There are substantial benefits in these technologies and initiatives being implemented swiftly and comprehensively.

This Guide is to support businesses make the right decisions as to the technology to adopt. It provides:

• Approximate costs of and energy savings for a range of energy efficient technologies and initiatives.

• A Retrofit Calculator that enables calculation of the energy saving potential of energy efficient technologies and initiatives, when applied to a specific building.

• Information as to the applicability, advantages and limitations of different steps.

• Case studies of real-world energy efficiency initiatives and their actual impacts.

It also enables a business case to be developed for investing in the energy efficiency of buildings, supporting sustainability teams as well as buildings and facilities managers in their work.

To communicate information on the range of technologies available, we show in simple “marginal abatement cost curves” the carbon and energy savings from different technologies and initiatives.

This Guide focuses on investment in energy efficiency technologies. This is part of the picture in termsof energy savings. Businesses will also want to take action on behavioural change and retro-commissioning, which we also briefly explain in the Guide.

The Purpose of the Guide

Housekeeping& Behavioural

Change

Retro-Commissioning

(RCx)

Retrofitting(the focus ofthis Guide)

Please see http://bec.org.hk/resource-centre/eerguide_intro#tb1 for more information on each building type.

What Does the Guide Contain?

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Greenhouse Gas Marginal Abatement Cost Curve

Type 2 Office Building – showing cost savings in end-of-life scenario for high capital cost technologies andwithin lifetime for others

Type 1 Office Building – showing cost savings in end-of-life scenario for high capital cost technologiesand within lifetime for others

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The Guide contains information on key energy saving technologies and initiatives for commercial buildings, offices and hotels. It shows the approximate energy saving potential in terms of carbon and energy, as well as costs and payback periods. The Marginal Abatement Cost Curves, we have produced, show the best steps to take. For more detail on each, please have a look at the Guide.

For technologies which have high capital costs, highlighted in blue, such as lifts, glazing and plug fans, we use “end-of-life scenarios” including only the incremental capital cost of the more efficient technology in our calculations. This means their costs are calculated based on the difference between an energy efficient replacement and a like-for-like replacement at the end-of-life stage, as in practice it would be rare to upgrade those technologies at any other stage.

ACalculated based on end-of-life scenario(incremental cost)


Tenant Office Design to 300luxFresh air demand controlTenant Office Lighting Control with Occupancy SensorsOil-free Water-cooled ChillersDC fan coilsVariable speed drive chilledwater pumpsLED lighting in landlord areasPlug fans for AHU (Fan wall)Smart controls / BMSSeasonal chilled water temperature reset

Variable speed drive water-cooled ChillersCarpark fans with VFD andCO sensorHigh-volume low-speed (HVLS) fansHigh efficiency liftsRegenerative braking liftsSolar control window filmPhotovoltaics (PV)High Performance Glazing

Fresh air demand controlTenant Office Design to 300luxOil-free Water-cooled ChillersVariable speed drive water-cooled ChillersTenant Office Lighting Control with Occupancy SensorsPlug fans for AHU (Fan wall)Variable speed drive water-cooled ChillersLED lighting in landlord areasHigh-volume low-speed (HVLS) fans

Carpark fans with VFD and CO sensorSeasonal chilled water temperature resetSolar control window filmSmart controls/ BMSHigh efficiency liftsRegenerative braking liftsPhotovoltaics (PV)High Performance Glazing

The Guide provides a description of each main technology with figures showing approximate carbon and cost savings plus payback periods in relation to capital expenditure for 4 categories of buildings.

The Guide is supported by the Retrofit Calculator that enables you to calculate the approximate carbon and energy savings in your own building.

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Hotel Building – showing cost savings in end-of-life scenario for high capital cost technologies andwithin lifetime for others

Type 3 Office Building – showing cost savings in end-of-life scenario for high capital cost technologies andwithin lifetime for others

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Tenant Office Design to 300luxVRF or high efficiency split typeTenant Office Lighing Control with Occupancy SensorsLED lighting in landlord areasCarpark fans with VFD andCO sensorHigh efficiency lifts

Regenerative braking liftsPhotovoltaics (PV)High-volume low-speed(HVLS) fansSolar control window filmHigh Performance Glazing


LED lighting in landlord areasOil-free Water-cooled ChillersHeat pumps for domesic hot waterSmart controls/ BMSVariable speed drive water-cooled ChillersSeasonal chilled water temperature resetFresh Air Demand Control -Fresh Air FanFresh Air Demand Control -Primary Air UnitVariable speed drive chilled water pumps

DC fan coilsPlug fans for AHU (Fan wall)Solar hot water (SHW)Solar pool heaingHigh efficiency lifsCarpark fans with VFD and CO sensorRegeneraive braking lifsHigh-volume low-speed (HVLS) fansSolar control window filmPhotovoltaics (PV)High Performance Glazing

Who is the Guide For?

We anticipate that this Guide and Retrofit Calculator will help the various parties involved have a conversation with other parties, for example for tenants to talk to landlords as to action that can be taken and for sustainability teams to discuss next steps with building managers and finance teams.

The Guide is targeted at…

How have the Guide & Retrofit Calculator been developed?

The project has built on past BEC projects: Every Building a Powerhouse in 2010, and Carbon Smart Buildings in 2012. The building technologies included in the Guide and Retrofit Calculator were selected mainly based on the results from interviews and surveys with BEC members.

The figures shown in the Guide and the Retrofit Calculator are based on a modelling exercise, carried out by engineering consultants appointed by BEC, using data collected from BEC Members and distributors. The Guide also includes case studies prepared with the support of BEC members to provide real-world examples and data. The figures are not exact and should only be used as a rough guide of savings that can be made.

To understand the cost, energy and carbon savings from energy efficient technologies

& initiatives

Building Owners

To understand how they can benefit from such technologies & initiatives, in terms of

cost savings and increased comfort levels

Tenants

To have an overview of technologies & initiatives currently available, and their

applicability to various building types

Building and Facility Managers

Access the Guide and

Retrofit Calculator

https://goo.gl/8QWbPf https://goo.gl/dQnhne

To access the Retrofit Calculator:To access the Guide:

Energy is an essential part of daily life. But effective management of energy demand is important in helping reduce carbon emissions, improve our air quality and run our businesses efficiently. Businesses need good, easy to understand information on energy saving initiatives to help them decide where their investments will get the best returns. That is why BEC has developed this Retrofit Guide and Calculator. It offers practical assistance and clear advice to property owners and managers to help them achieve highly energy efficient buildings.

Mr Richard Lancaster

Chairman,Business Environment Council Limited

Energy efficiency and conservation is central to the HKSAR Government’s environmental policies, as reflected in the Energy Saving Plan and Climate Action Plan 2030+. Energy saving should no doubt be our common goal, not just for cost concerns but also for our aspiration to thrive in a clean and green environment, as well as to tackle the global problem of climate change. I would like to encourage our stakeholders to actively participate in energy saving efforts. With the launch of this Guide and Calculator by Business Environment Council, they could provide an easy reference for stakeholders on investment in energy efficient technologies.

Ir Alfred Sit

Director of Electrical and Mechanical Services, Electrical and Mechanical Services Department, HKSAR Government

As the Chairman of BEC’s Energy Advisory Group, which has steered this project along the way, I am pleased to promote this Guide to Energy Efficient Retrofits of Office and Hotel Buildings to all those looking to understand better the steps they should be taking. It shows the approximate cost savings, energy savings and return on investment from the most important energy saving technologies and initiatives in simple “marginal abatement cost curves”, calculated through robust simulations. The Retrofit Calculator that accompanies the Guide is a simple, easy-to-use excel file that is able to provide approximate energy and cost savings data for individual buildings.

Mr Tony Small

Chairman,Energy Advisory Group,Business Environment Council Limited

For KAS, energy efficiency is vital in reducing the risk of severe climate change. We are firmly committed to the goal of keeping the global temperature rise under the 2°C limit set out in the Paris Agreement. We recognize the important contribution of all cities and countries in the transformation that is needed to achieve this. I hope that the study underlying this Guide and the tools published will contribute to Hong Kong’s green transformation. The city should strengthen its efforts to become a pilot for other metropolitan areas in Asia in sustainable development and our Foundation is pleased to be a partner on this path.

Dr Peter Hefele

Regional Director,Energy Security and Climate Change Asia-Pacific, Konrad-Adenauer-Stiftung

Supported by:

Copyright© 2017 Business Environment Council Limited

All rights reserved. No part of this publication and the associated Guide and Retrofit Calculator may be reprinted, reproduced or utilized in any form orby any electronic, mechanical or other means, now known or hereafter invented, without prior permission in writing from BEC.

AcknowledgementsThis project, leading to this Guide to Energy Efficient Retrofits of Office and Hotel Buildings and the Retrofit Calculator, has been supported and steered by BEC’s Energy Advisory Group and is kindly funded by Konrad-Adenauer-Stiftung.

BEC would like to thank: Konrad-Adenauer-Stiftung for its generous funding, Cundall Hong Kong Limited for cost and energy savings modelling and the development of the Retrofit Calculator, and the team of student interns from Worcester Polytechnic Institute, for their interviews and case studies.

We would also like to thank our BEC Energy Advisory Group members, without whom this work would not be possible.

About BEC

Business Environment Council Limited (“BEC”) is an independent, charitable membership organization, established by the business sector in Hong Kong. Since its establishment in 1992, BEC has been at the forefront of promoting environmental excellence by advocating the uptake of clean technologies and practices which reduce waste, conserve resources, prevent pollution and improve corporate environmental and social responsibility. BEC offers sustainable solutions and professional services covering advisory, research, assessment, training and award programs for government, business and the community, thus enabling environmental protection and contributing to the transition to a low carbon economy.

Disclaimer

This publication and the associated Guide and Retrofit Calculator have been prepared by BEC on the basis of information available at the date of publication without independent verification. The information contained is of a general nature; it is not intended to address the circumstances of any particular company or entity and BEC is not, by means of this publication, rendering any business, financial, legal, or other professional advice or services in any form. BEC does not guarantee or warrant the accuracy, reliability, completeness or currency of the information in this publication nor its usefulness in achieving any purpose. BEC shall not be liable for any loss, damage, cost or expense incurred or arising by reason of any person or entity using or relying on the information in this publication. Please be aware that the websites referred to in this publication may be changed, suspended or removed without prior notice.

List of Companies in BEC Energy Advisory Group (in Alphabetical Order)

A. S. Watson GroupActive Energy Management LimitedAECOM Asia Company LimitedCaSO (HK) Engineering Company LimitedCEDS LimitedChina Harbour Engineering Company

LimitedChinachem GroupCLP Power Hong Kong LimitedCundall Hong Kong LimitedEBP Hong Kong LimitedEnergenz Consulting LimitedEn-trak Hong Kong LimitedExxonMobil Hong Kong Limited

Gammon Construction LimitedGeb Impact Technology Company LimitedHongkong International Terminals LimitedHongkong Land LimitedJinchat Engineering (HK) Company LimitedLai Sun Development Company LimitedLeigh & Orange LimitedLirrico Technologies LimitedMayer Brown JSMMTR Corporation LimitedNetsphere Solution LimitedOve Arup & Partners Hong Kong LimitedSchneider Electric (Hong Kong) LimitedSiemens Limited

Sino Land Company LimitedSwire Pacific LimitedSwire Properties LimitedThe Baroque on Lamma LtdThe Hong Kong & China Gas Company

LimitedThe Hongkong Electric Company, LimitedThe Lantau Group (HK) LimitedTUV Rheinland Hong Kong LimitedVeolia Environmental Services China

LimitedWise Ally Holdings LimitedYau Lee Holdings Limited

For a full list of acknowledgements please see: http://bec.org.hk/resource-centre/eerguide

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a guide to energy efficient retrofits of office and hotel...

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