Biomass steam in both plans, PV on the factory roof only

User, 17 Oct 2026: "only put solar on the factory, prepare the other
buildings for solar, option a and b should operate on biomass".

- Steam: two 500 kg/h biomass modules (Getabec class, 6M to 10M THB) plus
  a fuel store and handling block (1M to 2M, estimate) in both plans; the
  electric bank becomes the alternative. ~0.67M THB of fuel a year against
  ~4.9M for electric steam; grid demand ~264 kW instead of ~980 kW.
- Solar: ~520 kWp on the factory roof (the biomass-case optimum is ~500 to
  550 kWp, hourly sketch in sustainability.md "PV size with biomass
  steam"); office roof and parking canopies built PV-ready (~120 kWp
  later). ~87 % used on site, ~61 % of the plant's electricity.
- Calculator: biomass default, bFuel row, pvKWp 520, pvSelf 87, iso fills
  the factory roof first and shows the other roofs as PV-ready.
- Numbers: launch plant ~168M / 232M / 296M with contingency; Plan A
  ~182M (~2M above 180M: the Chinese-route lever priced only electric
  boilers; a Chinese biomass quote is the way back), Plan B ~217M (label
  ~215M), ~35M more. Calculator EBITDA A 2.17M, B 2.23M USD.
- CSV, total-investment, revenue-model, sustainability, scale, biomass,
  site-candidates, boi, steam-cooling, construction RFQ (canopies
  PV-ready), README, roadmap; business plan draft 0.3 rebuilt (A and B
  63 pages) with new renders.

docs/steam-cooling.html

@@ -179,7 +179,7 @@ td.low{color:var(--warn);font-weight:600}
     <h3>Boilers (Miura, Bangkok Industrial Boilers, STE)</h3>
     <ul>
       <li>2 × 500 kg/h against 3 × 500 kg/h and 1 × 1 t/h: price, footprint, lead/lag control, service from Chiang Mai.</li>
-      <li>Fuel: electric, biomass or LPG (sustainability.md, biomass.md); an electric bank draws ~312 to 375 kW for the launch plant, ~520 to 625 kW with five presses.</li>
+      <li>Fuel: biomass for B-1 and B-2 in both business plan versions (decided October 2026, biomass.md); an electric bank, the alternative, would draw ~312 to 375 kW for the launch plant, ~520 to 625 kW with five presses.</li>
       <li>Economizer on a fired bank: outlet feed and stack temperature, corrosion limit, pressure drop; rice husk ash is high in silica and abrasive, so fouling, cleaning, wear protection and a bypass.</li>
       <li>Blowdown cooling to the effluent limit; boiler registration and licensed operator (facility-security.md).</li>
       <li>Footprint per module with fuel feed, dust collector and fan, against the ~18 × 9 m hall laid out for four modules.</li>