cogeneration on campus
Post on 19-Oct-2014
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Case Study presentation on a cogeneration projectTRANSCRIPT
Cogeneration on CampusCogent Plant at UNSW
Nalin Wickramasinghe
25 June 2010
1Commercial-In-Confidence
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
Commercial-In-Confidence 2
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
Commercial-In-Confidence 3
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
Commercial-In-Confidence 4
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
Commercial-In-Confidence 5
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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
Commercial-In-Confidence 12
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
Commercial-In-Confidence 13
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
Commercial-In-Confidence 14
Typical Commercial Building Profile
Commercial-In-Confidence 15
UNSW Lowy Cancer Research Centre – Cogen & Grid Profiles
Commercial-In-Confidence 16
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kW
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
Commercial-In-Confidence 17
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……….
Commercial-In-Confidence 18
