Cogeneration on CampusCogent Plant at UNSW

Nalin Wickramasinghe

25 June 2010

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Overview

Cogent Energy – overview & business model

UNSW – Lowy Cancer Research Centre project background

plant overview

benefits achieved

Campus configuration vs. CBD commercial tower

Future opportunities at UNSW campus

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Company Overview

Distributed energy retailer and network operator

Licensed electricity retailer

Founded in early 2007 – offices in Melbourne & Sydney

Cogent is a BOOT scheme operator

Currently operating 6 plants – 5.4 MWe capacity

Further 2 plants under construction – 1.8 MWe

Since July 2009 fully-owned by Origin Energy Retail

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Cogent Energy Business Model

Cogent is a licensed retailer & also owns the plant:

Majority financed by Cogent

Cogent designs, configures & maintains plant -

We invoice monthly metered energy – electricity & thermal

Competitive energy pricing compared to similar grid supplied

Client’s scope includes:

Provision of suitable plant room with ventilation & sound attenuation

Bring electrical distribution & thermal reticulation systems to Cogent plant

Natural gas connection from meter set

12 year supply agreement with client (building owner)

Option to extend at end of period or buyout the plant at residual value

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UNSW Lowy Cancer Research Centre

Dedicated cancer research facility - $127m project

Located on UNSW campus at Kensington

16,500 sqm facility accommodating 400 specialist staff

One of the largest facilities in southern hemisphere

State-of-the-art facility with many ESD features

Cogeneration was a key part of the ESD strategy

Cogent Energy awarded contract to design, install & operate a cogen plant (12 year term)

Construction commenced in September 09 and the cogen plant was commissioned in November 09

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Overview of UNSW Plant

MTU gas reciprocating engine

772 kWe (4000 series V8 unit / 415v alternator)

Containerized within acoustic enclosure – rooftop location

Heat recovery module – 410 kW (hot water)

Plant is configured in parallel with incoming feeder

Excess Electricity fed back into the 11kV UNSW owned ring and utilized within the University

Cogent operate plant peak & shoulder periods (15hrs x 5 days) with off-peak grid supply

Plant is monitored & managed remotely in real-time via Back Office System

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Benefits of UNSW Cogen Plant

Reliability: highly reliable parallel cogen solution running parallel with grid

Energy Efficiency: up to 70% achieved

Sustainability: Saving of approximately 1,600 tonnes of CO2

per annum

Offers UNSW certainty of energy pricing & control over carbon emissions

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Advantages of the Campus Configuration

Typical CBD commercial tower configuration has constraints: Parallel import with no export – plant sizing is critical

Considerable modulation with building load variation

Impacts plant efficiency

Campus configuration eliminates these: Plant is connected in parallel with a LV feeder from UNSW Substation

Means plant can operate at full capacity – excess electricity exported in to ring & supplied to other UNSW buildings

“Exporting” achieved without the legal issues & energy market complexities

Similar utilization of hot water via campus reticulation

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Typical Commercial Building Profile

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UNSW Lowy Cancer Research Centre – Cogen & Grid Profiles

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KVAR

KVA

HV Ring/Engine Split

"HV Ring Demand Real Power - Sliding" Cogen Total Demand Real Power - Sliding

Future Opportunities on Campus

Cogent is currently working on a 1.2 MWe trigeneration plant Located at Central Energy Plant

Supply the new Tyree Energy Technology Building

Connected to electrical ring main & chilled water reticulation system

Further development: Cogent doing preliminary feasibility on 2 more plants on campus Capacities in the range 400 kWe – 800 kWe

Efficient utilization of the 2 ring mains on the UNSW campus

Further reticulation of hot water around the campus from cogen plant

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In General…..

Market for DE has grown rapidly over the past 12 months

City of Sydney 2030 project (330 MW) has added impetus

We have made progress with over 7.0 MW committed in Sydney & Melbourne

Still many challenges to overcome……….

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Thank you…………………..

nalin@cogentenergy.com.au

+61 (0)437 260 822

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