Eneabba Gas Limited - Energy Generation for Regional Infrastructure in Western Australia

Centauri 1 Power Station

PROPOSED CENTAURI 1 POWER STATION 168MW

While no firm projections for the Centauri 1 Power Station 168MW and the future energy customer base have been finalised, the engagement of ACIL Tasman has provided a Market Model that gives management an estimate of opportunities and also attempts to place a range of values attributed to the IMO Capacity Payment, that are an integral part of the conditional power station generating capacity approval. Any future commercial feasibility, the funding and detailed financial projections, will be subject to a separate and unique commercial proposal, specifically focussed on the feasibility and operation of that plant. A separate funding, capital raising or other financial arrangement will be put in place at the time such a commercial proposal may be considered by the Company. This advised intention, also explains why certain timely and preliminary approvals and conditional certifications have been sought by the Company, should this future investment be considered by the Company.

In August 2004, the Company sought initial design and budget pricing indications from two gas turbine power station manufacturers. The basis of selection, apart from economical operation costs, was to have maximum flexibility of the generation plant, along with equipment capable of the meteorological requirements particular to the area. Operation and energy outputs of the plant would have to be maintained within the constraints of summer temperatures regularly in excess of 41o C.

In addition to the IMO specifications for SWIS energy supply, the Company also required the budget specification to meet the 100MW output on days where temperatures exceeded 45o C for up to 3 hours, being previously recorded meteorological data in the area. From those detailed enquiries, the Company selected GE Energy as the preferred equipment provider, with the configuration selected being four (4) units GE LM6000 gas turbines (with "as built" model specifications to be agreed, once final gas testing had been undertaken).

The Company also appointed engineering and power station consultants, Sinclair Knight Merz (SKM) to assist in further development of specification of the power station with GE Energy and also lodgements to Western Power for interconnect negotiation and transmission technical requirements. The Company lodged with the Office of Energy, an Expression of Interest in regard to the Wholesale Electricity Market and SWIS, on 6th December 2004. Further lodgements were also made with the IMO to secure certification of a base load 100MW power station for connection to SWIS no later than July 2008.

While initial budget pricing and design parameters have been undertaken by the Company, the final detailed plant configuration has yet to be confirmed with GE Energy. As a guide to prospective investors, the Company has been provided budget estimates for a "turnkey plant" that fall within the industry benchmark of approximate plant cost of $1.0m / MW (or approx $100 m).

Final site selection for the Centauri 1 power station has indicated a general location of Steele Road, east of the Dongara Township, with close proximity to the existing transmission network and with a road network adjacent. A proposed power station site layout as certified by the IMO is shown as indicative of the likely Centauri 1 power station design.

Basis of design

                        Location                       area near Dongara, Western Australia

                        Elevation                      50 m ASL

                        Design Range              10o C – 40o C    see comments*

                        Rel Humidity                20% - 100%

                        Primary Fuel                 natural gas

                        Secondary Fuel             possible coal seam methane

                        Seismic zone                UBC Zone 2

                        Wind                           100 MPH          160 KPH

                        Sound prox                   85dBA at 1.0m horiz : 1.5m vert

                        Sound in field               65 dBA at 150 yds         : 125 m

 

EPA Submission

EGL has appointed Strategen to act as the Company's environmental consultants to continue the process with the EPA of Western Australia and has lodged the initial section 38 (1) Referral Application with the Department.

 

Land Purchase

Eneabba Gas Limited (ASX:ENB) on 22 May 2006 announced  the purchase by a wholly owned subsidiary of EGL, Eneabba Energy Pty Ltd, of approximately 1,630 hectares (4,044 acres) of freehold land near Dongara in the mid west region of Western Australia. The details of this are given in the "Newsroom" of this website.

 

Summary of plant, as submitted to IMO : Rule 4.10.1

Available capacity from the four (4) turbines at the Centauri I Power Station

*The EoI submitted by EGL allows for a continuous base load of 100MW supply and a "buffer" oversupply of an additional 10MW. The current meteorological data combined with "typical CSM" gas supply analysis anticipates that at 41oC (the specification of supply at peak temperature) some 28.9MW per gas turbine (115.6MW) can be achieved and should EGL desire to install evaporative coolers instead of air coolers that capacity could increase to 32.3MW for each of the four gas turbines (total of 129.2MW). Considering this flexibility, EGL also considered under this Reserve Capacity Mechanism at a peak load at 41oC allowable at 130MW capacity, but only a Capacity of 110MW for SWIS.

In regard to non-summer temperatures the proposed base of each of the GE LM6000 gas turbines, may be capable of generation of an average 40MW – 42MW. This would give the Centauri I Power Station some 160MW – 168MW capacity. An existing GE LM6000 gas turbine unit in operation  at Kambalda has already established similar outputs. EGL understands  that the new model LM6000 PD Sprint can achieve a nominal output of 46.9MW, somewhat above existing operational units. Since EGL has yet to finally complete technical tests; this data and final model selection is yet be confirmed.

EGL has, on the above basis, sought certification from the Office of Energy under Rule 4.11 & 4.12 at the temperature of 41 o C level for two levels of preliminary Capacity.

SWIS                    100MW  standard delivery            110MW  on-demand

Total Capacity       130MW  peak temperature            160MW  off-season

A letter of support from the Region Manager, GE Aero Energy confirming the progression through that organisation of the ordering, delivery and maintenance of this proposal has been given to the company and is attached.

GE

 

 

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Eneabba Gas Limited
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