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2.5 Capital Cost Estimates Given the current state of CHP technologies as described in the preceding sections, i.e., very few proven “reliable” are available, there is really insufficient cost data to allow preparation of a proper financial analysis. In the case of Stirling engines and Brayton cycle systems there are no reliable technologies available. There are a few pilot units in operations but the costs of these small demonstrations cannot be extrapolated to provide any reasonable capital cost estimates. Estimates and quotes are available (from suppliers and feasibility studies for remote communities, e.g., Yukon Energy Haines Junction FEED Study) for some of the gasification and ORC technologies although some of these have to be “taken with a grain of salt” due to the number of units in operation and absence of any units in remote communities. This report will therefore necessarily limit itself to expected ranges of capital cost for ORC and gasification units. A proper feasibility study for evaluating the economic viability of remote community biomass power projects would have to take into account not only capital cost but also detailed information on the actual site, transportation logistics, the community electricity consumption and load growth rates, heat loads for a local heating network, feedstock availability and costs, operating costs and energy purchase prices. Figure 7 presents a normalized view of the capital cost for gasification equipment. The x-axis shows the size of unit and the y-axis then gives the cost of the unit per kilowatt (electric) of power generation capacity. This graph is based on actual vendor estimates, although in some cases vendor quotes for an identical unit delivered to two different sites within the same year varied by over 50% of the lower price – an indication of the uncertainty in this field. Another example, not included in the graph, was the estimate by Proton Power which came in at ~$4,000/kWe, less than half of all the other estimates. Given that at the time of the estimate the company’s only operating equipment was in a laboratory, the validity of this estimate must be questioned. Figure 7 - Capital Cost (per kilowatt) of Gasifier Equipment 21PDF Image | Yukon Biomass Electrical Generation
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