M1
Validation corpus
Public, citeable, NIST-anchored. IF97 steam, CoolProp refrigerants and ISO 5167 orifices, validated against reference data we publish in full — so reviewers can audit the numbers themselves.
Engineering Standard v4.12
Built by an engineer running 7 biomass boilers at a multinational
Validated thermal calculations with provenance on every export.
Twelve modules, IF97 + CoolProp validated, audit-ready PDFs with a reproducibility hash on every export. Plus Ask Dynamica — the AI co-pilot that runs the same engines and cites every tool call. No other thermal tool ships one.
47-case validation corpus · IF97 + CoolProp + EN 12952 · Ask Dynamica AI with citation block · SOC 2 Type I readiness in progress · PT-BR UI for LATAM teams · 5-day Pro trial, no card
Water T-s diagram
RE: IAPWS-IF97_V2
SHA-256: 8f2a…c391
FIG. 01
Saturation dome for H2O under IAPWS-IF97. Shaded loop is a Rankine cycle idealization.
All properties calculated via industrial-grade IF97 subroutines, ensuring sub-0.01% error margin against NIST RefProp benchmarks.
Wagner & Kretzschmar, Springer 2008
“I built Dynamica because I was tired of rebuilding the same steam-table spreadsheet every week while running 7 biomass boilers. Now my team uses it daily and the PDFs go straight into our QA file.”
- 12
- modules in one tab
- Up to 7
- days offline grace
- Per-org
- register + audit log
- IF97 / EN 12952
- standards traceable
§ 0 — Why Dynamica
Four moats, each one compounding.
We invest behind defensibility that an AI wrapper can't copy in a weekend: a validated property library, signed provenance on every result, regulated-industry controls, and matched content depth in the verticals we serve.
M2
Auditor-grade provenance
Provenance ships on every export: a reproducibility hash and the property package used, on every PDF. When a calc comes via Ask Dynamica, a full AI citation block is rendered as an extra layer alongside it.
M3
Regulated-industry trust
SOC 2 Type I readiness letter (draft) and DPA template (v0.1 draft) available on request. SAML SSO and exportable audit log shipped today.
M4
Vertical depth
Power, refining, pulp & paper packs pairing a deep technical article with the calculator that proves the point. The library compounds with every release; competitors restart from zero.
Compared to what you already use
EES / Mathcad
Desktop symbolic-math environments with deep custom-model flexibility, licensed per seat.
Vendor web calculators
Free, single-purpose tools for quick lookups — fast access without shared workspaces or audit trails.
Aspen HYSYS
Comprehensive process simulator for flowsheeting, equipment sizing and new plant design.
Dynamica fills the space between them: full thermo breadth, built for teams, browser-native.
§ I.b — Field comparison
Where Dynamica fits.
A quick read on price, deployment and audit posture against the tools engineers already know. The full matrix lives on the comparison page.
| Feature | Dynamica | Aspen HYSYS | EES / Mathcad |
|---|---|---|---|
| Starting price | $0 Free · $49/mo Pro | ~$10k+/seat/yr | $200–$1.5k/seat |
| Deployment | Web + PWA, offline-capable | Desktop install | Desktop install |
| Audit trail | Signed PDF + repro hash | Manual export | — |
| Best for | Working engineers, consultancies, auditors | Process design, equipment sizing | Academic, custom solvers |
See the full side-by-side at /compare →
§ I.c — The fleet-operator edge
Where fleets actually live.
Three capabilities every multi-site operator eventually rebuilds out of pivot tables and shared drives — already there, already audited. If you run a multi-boiler fleet, start here →
Offline-first PWA · 7-day grace
Save calcs at the boiler. The PWA queues your work and syncs the moment a network reappears. 7 days of grace by default; longer on Enterprise.
Per-org boiler register + audit trail
Per-org boiler register with audit trail — built for compliance, not spreadsheets. Every calc references a registered boiler; every change is logged.
Project workspaces
Scope work as “Acme Mill Retrofit 2026” — calcs, fuels, notes and Ask Dynamica chats stay together, with per-project visibility.
§ — Ask Dynamica
Meet Ask Dynamica — your thermal engineering copilot.
Natural-language access to steam tables, combustion, psychrometrics, power cycles, boiler performance and the full calculator suite.
- Plain-English calculator runs
Describe the problem; the assistant picks the right calculator and computes.
- Streaming with tool-call transparency
Watch each tool call appear inline — see which calc ran, with what inputs.
- Saved conversation history
Archive, restore and revisit prior threads. Your work is never lost.
- Inline error recovery
Interrupted streams resume in one click — no lost context, no retyping.
Always one click away — tap the sparkle button in the bottom-right corner once you're signed in.
§ I — Capabilities
Twelve instruments, one workbench.
Each module is built around the question an engineer actually asks at their desk — not a vendor's idea of a feature list. Type in what you know, get back what you need, and a citation for the road.
01
Steam tables
IAPWS-IF97 properties of water and steam across all five regions, with backward equations for fast iteration.
02
Power cycles
Rankine, regenerative and combined cycles. Edit state points and watch efficiency, work and heat rates update live.
03
Heat transfer
Conduction, convection and exchanger sizing with LMTD / effectiveness-NTU.
04
Combustion
Stoichiometry, excess air, adiabatic flame temperature and flue-gas composition for any fuel blend.
05
Biomass library
Curated proximate and ultimate analyses for over 180 woody and agricultural fuels, with HHV and ash chemistry.
06
Boiler & fleet
Direct and indirect efficiency per EN 12952, with fleet-level KPIs, alerts and longitudinal trends.
07
Project workspaces
Per-project membership silos calcs, boilers, fuels, notes and files. The creator is auto-added as project admin.
08
Ask Dynamica Assistant
Plain-English access to every calculator. Streaming answers with tool-call transparency and saved history.
Try Ask Dynamica →09
Boiler water chemistry
Cycles, blowdown, ABMA / EN 12952-12 limits, carryover. Pro+.
10
Heat transfer addendum
Advanced correlations, fouling factors and tube-side / shell-side comparison for exchanger reviews.
11
Safety valves
Pressure-relief sizing per API 520/521 and ISO 4126 — gas, liquid and two-phase, with discharge coefficients spelled out.
12
1D Network Solver
React Flow canvas for steam, condensate, flue-gas and hot-water networks. Incompressible, isothermal-compressible and two-phase HEM. Pro+.
Reference cycles for teaching — Otto, Diesel, vapor-compression refrigeration, psychrometrics — live at /academic.
BFB BIOMASS BOILER · LONGITUDINAL SECTION
RE: EN 12952
FIG. 02
Single-drum bubbling fluidized bed unit — distributor plate, bubbling sand bed, superheater bundles, economizer. The hardware our EN 12952 module is validated against.
§ II — Figures
A workbench that reads like a paper.
Design intent
“Replace the folder of spreadsheets and the printed steam table. Give every engineer on the team the same numbers a senior would have computed by hand — and show which equation produced each one.”
§ IV — Subscription
Free for one engineer. Priced for a team.
Free
$0
1 boiler · 50 calcs/mo
Public calculators with watermarked PDF exports.
Student
$0
.edu verified · annual re-verify
Everything in Pro while enrolled.
Pro
$49 / mo
or $490 / yr · 10k API calls/mo
All 12 modules, unwatermarked PDFs, uncertainty bands.
Team
$499 / mo
2 seats incl. · +$99 / extra seat · max 10
Shared org library, 30-day audit log, RBAC. Annual: $4,990 + $990/extra seat.
Enterprise
Custom
Starting at enterprise scale — let's scope it.
Unlimited everything, SAML SSO, DPA, SLA, full audit log.
Talk to sales →§ V — Questions
Briefly answered.
Quick answers on standards, accuracy, data sources and exports.
For property look-ups, energy balances, combustion, psychrometrics, refrigeration cycles, boiler performance, fleet management and similar working calculations — yes. For multi-unit flowsheeting and detailed equipment sizing, Aspen remains the right tool. Many teams use both: Aspen for flowsheets, Dynamica for everything else, plus auditable AI assistance and shareable PDFs.
Yes. Every Ask Dynamica tool call is logged with the exact inputs, the model used, and a SHA-1 hash of the canonical arguments. When you save the result, that provenance is stored on the calculation row and rendered as a citation block on the PDF export.
No. Dynamica runs entirely in the browser, with an installable PWA for offline use. No license server, no IT ticket, no desktop install.
Steam and water properties follow IAPWS-IF97 across all five regions. Power piping uses ASME B31.1. Water-tube boiler performance follows EN 12952-15 (indirect method). Psychrometrics is ASHRAE-aligned with altitude correction.
Property routines are validated against the IAPWS-IF97 reference tables to within reporting tolerance (typically ±0.01% on h, s and v). Backward equations in regions 1 and 2 are used to avoid Newton solves on bulk sweeps.
Proximate and ultimate analyses are sourced from Phyllis2 (ECN.TNO), the U.S. DOE Biomass Feedstock Library, and peer-reviewed literature. Each fuel entry shows its originating citation and revision date.
Yes. Every result carries a citation block naming the standard, revision and equation used. Reviewers see exactly which IF97 region, which EN 12952 loss term, and which fuel-library entry produced the answer.
SI by default, with per-field unit toggles for imperial (psia, °F, BTU/lb) and engineering mixes (bar·a, kJ/kg). Conversions are exact rather than table-rounded.
Yes. The workbench is an installable PWA — once loaded, the app shell, calculator routes and steam-table assets are precached by a service worker and continue to work without a network connection. A signed desktop build for fully air-gapped acceptance testing on isolated plant networks is on the roadmap for the Enterprise tier; contact us if you need early access.
The workbench installs as a PWA from any modern browser — no app store required. Desktop (Chrome / Edge): open the app, click the install icon (a small monitor with a down-arrow) in the right-hand side of the address bar, then confirm 'Install'. macOS Safari: File → Add to Dock. iOS Safari: tap the Share button, then 'Add to Home Screen'. Android Chrome: tap the three-dot menu, then 'Install app' (or 'Add to Home screen'). After install, launch the app once while online so the service worker can precache the calculators and steam-table assets — subsequent launches work fully offline.
Each tenant runs in an isolated namespace with row-level security. Saved cases never leave your region, and auditor access is granted through signed read-only links with an expiry — not shared credentials.
Yes — every case exports as JSON (full state) or CSV (tabular). There is no lock-in; if you cancel, you keep your exports and the citations remain valid against the published standards.
Technically yes, but it will break your QA process. Every PDF footer is stamped with the signed-in user's email, organization and a timestamp, so a shared account makes every deliverable look like it came from one person. Pro also enforces a single active session — when a second person signs in, the first is signed out within seconds. Team gives every reviewer their own identity, per-project membership and a 30-day audit log.
Open the workbench. Start computing.
The Free tier unlocks immediately, with no card. Bring your own units, your own fuels, your own cycles.