OEH Energy Efficient HVAC

for Business Training Coursewww.environment.nsw.gov.au/training

Presenter:

Chris Warris, BCW Carbon and Energy

• Overview of OEH Energy Efficiency Training Program

• Outline of OEH Energy Efficient HVAC for BusinessTraining Course:

– Target Audience(s)

– Aims

– Format of Training, Including Post-Training Support Offerings

– Outline of Topics Covered in the Training Course

– Details of Upcoming Courses

Agenda for Today

• General: Energy management basics; Building the business case; PIAM&V

• Technologies: Lighting; Cogeneration; Commercial Refrigeration; HVAC

• Sectors: Aged care; Registered clubs

• Face to face training; average of 15 participants

• Subsidised course fees, typical pricing:

– Sydney metro: $200

– Regional NSW: $100

– Custom courses: $2,000 (per organisation)

OEH Energy Efficiency Training Courses

NSW Energy Efficiency Action Plan (EEAP)

Why is HVAC Energy Efficiency Important?

HVAC (and Refrigeration) in Australia:

• 22% of national electricity consumption • 45 million individual installations • $6 billion in capital investment per annum,

~$100 billion installed HVAC&R infrastructure • 12% of national Greenhouse Gas emissions

From Cold Hard Facts 2, Dept of the Environment, 2013

Whole Building Energy End Use Breakdown

Why is HVAC Energy Efficiency Important?

Best practice optimization,

operation & maintenance

of existing systems can

deliver savings of >50%

Even higher savings

achievable by upgrading

major plant.

Module one: Introduction to energy efficient HVAC (Half Day)

• Aimed at building owners, executive managers, sustainability/ environment officers, operations and facilities managers (i.e. anyone involved in managing or operating buildings)

Module two: Energy efficient HVAC optimisation, operation and maintenance strategies (Full Day)

• Aimed at personnel directly involved in the day-to-day operation, maintenance & technical aspects of HVAC systems (e.g. facility managers, mechanical services consultants/contractors and technical service providers)

OEH Energy Efficient HVAC for Business Training Course

• Drivers, Barriers and Stakeholders for HVAC Energy Efficiency

• Steps to Achieving HVAC Energy Efficiency (Energy Management Planning)

• What Makes a High Performing Building?

• HVAC Equipment and Energy Consumption

• Low Emissions Refrigerants

• Optimisation Strategies

• Operation and Maintenance Strategies

• How to Assess HVAC Improvement Opportunities in Your Organisation

• Site Tour of HVAC Plant Room

• Post-Training Technical Support.

HVAC Course Topics

OEH Energy Efficient HVAC for Business Training Course

• Rising energy prices

• NABERS and Green Star ratings

• Commercial Building Disclosure (CBD)

• Save money, enhance asset values, increase profits and tenancy rates

• Growing stakeholder awareness and higher expectations.

Drivers for HVAC Energy Efficiency

• There are multiple stakeholders

• HVAC systems can be technically complex

• Buildings change over time – equipment ages, new tenants bring new fit outs etc

• HVAC systems tend to be “invisible” until something significant fails – problems are often masked by consuming more energy

• Solution: Energy Management Planning

Barriers to HVAC Energy Efficiency

Energy Management PlanningSteps to Achieving HVAC Energy Efficiency

Where are we now?

Where do we want to be?

Who is going to get us there?

How are we going to get

there?

How will we know when we have got there?

How do we stay there/improve

further?

• Increase Energy Awareness of occupants

• Reduce Internal Building Loads

• Improve Thermal Performance

• Improve Operation, Optimisation &

Maintenance of existing HVAC Systems

• Upgrade HVAC Equipment.

How to Improve Building Performance

HVAC Energy Consumption

Source: DCCEE - Guide to Best Practice Maintenance & Operation of HVAC Systems for Energy Efficiency

Energy breakdown for a typical commercial office building in Sydney Climate

• Two broad approaches to improve HVAC energy

efficiency:

– Optimise operation of existing equipment (low cost)

– Replace existing equipment (higher cost)

• Low (or no) cost HVAC optimisation opportunities are

discussed in the training course

• The opportunities are taken from the “OEH/AIRAH

HVAC Optimisation Guide”

http://www.environment.nsw.gov.au/business/hvac-guide.htm

HVAC Optimisation Opportunities

SYSTEM SUPERVISORY CONTROL OPTIMISATIONS

• Optimum Start/Stop Programming

• Space Temperature Set Point And Control Bands

• Master AHU Supply Air Temperature Signal

• Staging Of Chillers And Compressors

PLANT CONTROL PARAMETER OPTIMISATIONS

• Duct Static Pressure Reset

• Temperature Reset

– Resetting Heating Hot Water (HHW) Delivery Temperature;

– Resetting Chilled Water (CHW) Delivery Temperature;

– Resetting Condenser (CHW) Water Delivery Temperature;

• Retrofit of Electronic Expansion Valve.

HVAC Optimisation Strategies

VENTILATION AND AIRFLOW OPTIMISATIONS

• Economy Cycle

• Night Purge

• Demand Control Ventilation – controlling CO2/CO for occupied spaces, carparks & loading docks

VARIABLE SPEED BASED OPTIMISATIONS

• Optimised Secondary Chilled Water Pumping

• Variable Head Pressure Control (Air & Water Cooled Condensers)

OTHER HVAC OPTIMISATION OPPORTUNITIES

• Optimising Existing Fan/Pump Distribution Systems, Rebalancing Distribution Systems, Duct Leakage, Optimising Boilers, Demand Response, Occupancy Control, Free Water-side Cooling.

HVAC Optimisation Strategies

• HVAC energy efficiency strategies are rarely “set & forget”

• Most can be un-done as easily (or even more easily) as they are implemented, e.g.

– Set points, operating times & other control parameters can be altered – deliberately or inadvertently

– Many rely on sensors, actuators, VSDs etc to be working properly – these are items that periodically fail

– Building loads may change (occupancy, lighting etc)

• Control strategies and equipment must therefore be regularly reviewed and maintained.

Energy Efficient HVAC Operation and Maintenance

Three key strategies can contribute to a best practice operation & maintenance program:

1) Develop and implement an energy management plan

2) Deliver energy based training for occupants, operations staff, and maintenance contractors

3) Target maintenance delivery for energy efficiency outcomes

These strategies are discussed in more detail in the HVAC Training.

Energy Efficient HVAC Operation and Maintenance

• To assist with project implementation and case study development

• OEH contributes up to $3000

• Client fee of $300

The aim is for participants to implement energy saving projects!

Post-Training Support:

OEH Energy Efficiency Training Courses

• 50% discount for all remaining HVAC courses in 2015.

• Use the offer code ‘AIRAH_2015’ when booking through the OEH website:

www.environment.nsw.gov.au/training

Special Offer for AIRAH Members:

Upcoming OEH HVAC Courses

• Sept 22 – HVAC Module 1

• Sept 23 – HVAC Module 2

• Nov 25 – HVAC Module 1

• Nov 26 – HVAC Module 2