| system | initial cost ($ + hrs) / unit | annualized cost ($ + hrs) / unit | sqft building | sqft land | other resources | revenue | market cost | benefits | | --------------- | ----------------------------- | -------------------------------- | ------------- | --------- | ----------------------------------------------------- | ------- | ----------- | ------------------------------------------------------------------------------------------ | | Small Wind Farm | $2.8M + 22,400 hrs | $324k + 7,040 hrs | 5,000 | 10 acres | Manufacturing facility, Grid connection, Access roads | $150k | $438k | Energy independence, Manufacturing capability, Distributed generation, Community education | #### Assumptions - 50 turbines at 25kW each (1.25MW total capacity) - 20% average capacity factor - Community manufacturing of 60% of components - Internal resource unit costs (from source systems): - Grid connection infrastructure - Access road maintenance equipment - Manufacturing facility power/water #### Manufacturing Facility Requirements Initial Setup: $225,000 - Composite workshop: $50,000 * Mold systems * Curing equipment * Ventilation - Metal fabrication: $75,000 * Welding stations * Cutting equipment * Forming tools - Electronics assembly: $40,000 * Test equipment * Assembly stations * Programming tools - Testing facilities: $35,000 - Tool sets: $25,000 Space Requirements: 5,000 sqft total - Production area: 2,000 sqft - Assembly area: 1,500 sqft - Storage: 1,000 sqft - Testing area: 500 sqft #### Production Labor Hours Per Turbine - Blade production: 24 hrs - Tower fabrication: 16 hrs - Generator assembly: 8 hrs - Control systems: 12 hrs - Final assembly: 20 hrs Total: 80 hrs per turbine #### Market Solutions $438K/year Total cost if equivalent power was purchased from utility: - Energy charges: $350k/year - Demand charges: $48k/year - Connection fees: $40k/year #### Labor 4,800 Hours/year | Task | Hours/year | Notes | | ------------------------------ | ---------- | -------------------------------------------- | | Regular maintenance | 2,400 | 48 hrs per turbine | | Repairs and troubleshooting | 1,200 | On-demand response | | Performance monitoring | 600 | Data analysis and optimization | | Site maintenance | 400 | Access roads, grounds, electrical systems | | Safety inspections | 200 | Monthly detailed safety audits | | Total operational hours | 4,800 | | Initial Installation Labor: 17,600 hrs - Manufacturing (50 units × 80 hrs): 4,000 hrs - Site preparation: 2,000 hrs - Installation (50 units × 120 hrs): 6,000 hrs - Grid connection: 2,000 hrs - Testing and commissioning: 3,600 hrs #### Operating Costs $72k/year | Component | External Cost ($) | Internal Cost ($) | Notes | | --------------------------- | ----------------- | ----------------- | ---------------------------------------- | | Replacement parts | $35,000 | $15,000 | Mix of purchased and manufactured parts | | Materials and supplies | $12,000 | $5,000 | Maintenance materials | | Environmental monitoring | $3,000 | 0 | Wildlife impact studies | | Insurance | $15,000 | 0 | Liability and equipment coverage | | Permit renewals | $2,000 | 0 | Annual regulatory compliance | | Total annual cost | $67,000 | $20,000 | | #### Initial Costs $2.8M + 22,400 hrs -> $252k + 2,240 hrs/year | Component | Initial Cost ($ + hrs) | Lifespan (Years) | Amortized Cost/Year ($ + hrs) | Justification | | ------------------------ | ----------------------- | ---------------- | ---------------------------- | ------------------------------------------ | | 50 Turbines (materials) | $600k + 4,000 hrs | 20 | $30k + 200 hrs | 60% manufactured, 40% purchased components | | Manufacturing facility | $225k + 2,000 hrs | 15 | $15k + 133 hrs | Equipment and setup | | Installation equipment | $400k + 1,000 hrs | 10 | $40k + 100 hrs | Including crane and tools | | Site preparation | $300k + 2,000 hrs | 25 | $12k + 80 hrs | Roads, foundations, drainage | | Grid connection | $250k + 2,000 hrs | 25 | $10k + 80 hrs | Transformers, switchgear, controls | | Training program | $25k + 2,000 hrs | 5 | $5k + 400 hrs | Skill development and certification | | Total initial cost | $2.8M + 22,400 hrs | - | $252k + 2,240 hrs | | #### System Outputs | Output Type | Daily Units | Annual Units | Internal Cost ($/unit) | Internal Cost (hrs/unit) | Notes | | ----------------- | ----------- | ------------ | --------------------- | ---------------------- | ----------------------------------- | | Base Generation | 5 MWh | 1,825 MWh | $35.60 | 0.8 | Based on 20% capacity factor | | Peak Generation | 12 MWh | N/A | $14.83 | 0.3 | During optimal wind conditions | | Minimum Generation| 1 MWh | N/A | $178.00 | 4.0 | During low wind periods | #### Revenue $150k/year | Service Category | Revenue ($) | Notes | | -------------------- | ----------- | -------------------------------------------------- | | Excess power sales | $120k | Grid feed-in during overproduction | | Renewable credits | $30k | Sale of renewable energy certificates | | Total annual revenue | $150k | Additional value from offset community power costs |