Process Engineer/Drafter — PFD, Heat & Mass Balance, and P&ID for Waste-Heat-to-Power Pilot Skid - Contract to Hire

We’re an early-stage energy company developing a closed-loop, thermally regenerated salinity-gradient power system: an electrochemical (RED-type) stack discharges a concentration gradient to produce DC power, and a low-grade-heat regenerator (thermolytic ammonium bicarbonate — NH₃/CO₂ stripping and reabsorption, similar to amine gas-treating systems) continuously restores the gradient using host waste heat at 45–60°C. The concept follows published thermally-regenerative battery / RED heat-engine literature; proprietary materials are not part of this scope.

We have a complete written process description with a defined design point (~10 kW net electric, ~415 kW thermal input, sealed working fluid, dry-cooled, zero water consumption). We need a process engineer to convert it into a Rev-A engineering package.

Deliverables:

1. Process Flow Diagram (PFD)

2. Heat & mass balance (editable Excel, all streams)

3. P&ID, Rev A — stack loop, regenerator/stripper, reabsorber, recuperators, dry cooler, tanks, pumps, instrumentation

4. Equipment list with preliminary sizing (columns, HX duties, pump specs, tank volumes)

5. One revision cycle after our review

Native DWG + PDF required (AutoCAD or AutoCAD Plant 3D). Our fabricator’s drafter will handle skid GA/mechanical from your package.

Ideal background:

• Chemical/process engineering degree, 10+ years

• Absorption/stripping column design — amine, ammonia, or CO₂ gas-treating experience strongly preferred

• Heat-exchanger network and low-grade heat system design

• Electrochemical, membrane, or flow-battery system exposure a plus

• PE license a plus (stamped review will be a separate later engagement)

Timeline & budget: 3–4 weeks, est. 40–80 hours — propose your structure. Milestones: PFD + H&MB (40%) → P&ID + equipment list (40%) → final package (20%).

To apply: NDA required before receiving the design basis. In your proposal, please include: (1) one example of an absorption/stripping or gas-treating system you engineered, (2) the P&ID software you use, (3) a representative (sanitized) P&ID sample.