Nga Awa Purua Geothermal Power Plant

Rotokawa, New Zealand

Dr. Dan Hoyer prepared the process design for the Nga Awa Purua project located next to the existing Rotokawa Plant. He prepared piping and instrumentation diagrams, process flow diagrams, two-phase flow line sizing, control valve sizing, and rupture disc sizing. Dan performed a net present value-style economic analysis based on a 25-year life cycle and various options for gathering system line sizes, the timing of make-up wells, and drilling costs.

Dan developed the procurement documents for the lump-sum EPC contract, including resource production and power generation system, evaluated bids, negotiated the contract, requested approval from MRP Board, signed the contract and led construction oversight for the owner (approximately $210 million). He managed the budget, provided technical oversight of a $60 million drilling program and contract; developed operations process and procedures, capital expense, and maintenance budgets ($25 million per year); and hired 40 professional and non-professional staff. Dan led the turnover of the resource production and power generation system from EPC contractor to Mercury, startup, commissioning, and operations. He negotiated and implemented O&M service and supply contracts valued at more than $6 million per year.

3. Feasibility Study
4. Well Drilling, Resource Production, and Power Plant and Transmission Line Construction
5. Start-up and Operation