Steam and cooling plant for the five-press fleet; utilities re-based

New page docs/steam-cooling.html (site /demos/steam-cooling/): the
utility plant as a clickable process diagram. Steam side: raw water,
softener and dosing, feed tank with heat-pump feedwater recovery, feed
pumps, a bank of two 500 kg/h boilers (third for N+1 as an option),
separator and metering, optional accumulator, blowdown, the 10 bar
header with a valved, metered branch and trap per press, drip legs and
condensate return. Cooling side: Newbilt's press outlets are open (max.
2 bar), so returns drain to a warm tank, pass the heat pump, an optional
dry cooler and a plate heat exchanger to a cold buffer tank, and VFD
pumps feed the 20 to 25 C header at ~10 bar to every press, the
extruders and the central hydraulic oil cooler; the chiller loop
(three 250 kW air-cooled modules at 40 C ambient, fourth as option) stays
closed and clean. Galvanics cooling (12 to 20 C) is a separate circuit.
Operating cases (launch, Duplex system 1, five presses, one module down)
show demand against installed capacity; design basis with sources,
equipment schedule, RFQ questions. Static SVG, no per-frame work.

Design basis at Newbilt's per-machine figures: steam 750 to 900 kg/h,
cooling 652.5 kW (625 presses, 15 extruders, 12.5 hydraulics), 305 to
540 l/min circulating. Also found: Newbilt's 53 l/min at ~60 C out is
~140 kW, above its 125 kW peak; listed as a re-quote question.

Re-based in the same commit:
- scale.md: electrical table (chiller bank ~210 to 325 kW electrical,
  plant peak ~430 to 700 kW, ~950 to 1,330 kW with electric steam),
  grid 800 to 1,000 kVA (1,250 to 1,600 with electric steam, Schedule
  4 past 1,000 kW), tariff 4.5M to 6.8M THB/yr, battery ~1 h of chiller
  peak, boiler and chiller banks, biomass up to ~550 t/yr at 1.5 M
  records, utilities money line.
- sustainability.md, biomass.md: same figures; electric steam 5.2M to
  6.0M THB/yr mature, 1.6M to 1.8M early; fuel saving 4.0M to 5.4M.
- utilities CSV: boiler bank, chiller bank with HX and tanks, softener
  and loop treatment re-sized; baseline 23.98M-41.63M -> 30.07M-51.33M.
- total-investment.md: re-size as an added-scope row (+185k / +294k
  USD); headline 4.7M to 8.9M unchanged until the investment re-base.
- pressing-line, equipment-suppliers, facility-security, fleet
  calculator (boiler 1000 kg/h, chiller 750 kW), plant page detail
  texts; README, landing page, build.sh.

docs/equipment/pressing-line.md

@@ -78,14 +78,17 @@ automated candidate). What it means:
   two shifts, the range the [revenue model](../finance/revenue-model.md)
   uses: four semi-automatic presses at 60 to 80 records an hour (estimate)
   and the Classic at ~128 an hour (28 s cycle, vendor figure).
-- **Utilities do not scale from the old figures.** At Newbilt's per-press
-  figures (steam 150 to 180 kg/h, cooling up to 125 kW per press), five
-  presses draw ~750 to 900 kg/h of steam and up to ~625 kW of cooling,
-  against the ~400 kg/h steam generator and ~250 kW cooling system that the
-  2024 quote's exclusions describe for one Duplex. The boiler, chiller,
-  electrical connection and [utilities CSV](../finance/utilities-investment.csv)
-  are **not yet re-sized** for this fleet; that waits for the re-quote's
-  figures ([scale](../scale.md)).
+- **Utilities, re-based for this fleet (October 2026).** At Newbilt's
+  per-machine figures (steam 150 to 180 kg/h, cooling up to 125 kW per
+  press) the five presses draw ~750 to 900 kg/h of steam and up to ~650 kW
+  of cooling with extruders and hydraulics, against the ~400 kg/h steam
+  generator and ~250 kW cooling system that the 2024 quote's exclusions
+  describe for one Duplex. The proposal is a bank of two 500 kg/h boilers
+  and three 250 kW chillers, one module per press stage; the layout, the
+  operating cases and the open RFQ questions are in
+  [steam and cooling](../steam-cooling.html), the electrical consequences in
+  [scale](../scale.md) and the costs in the
+  [utilities CSV](../finance/utilities-investment.csv).
 - **Investment**: the fleet change is carried in the added-scope table of
   [total investment](../finance/total-investment.md) until the next
   re-base.