Comfort, air quality and energy in one balance.
From automotive cabins to civil engineering and large structures, HVAC studies decide whether occupants are comfortable and whether the energy budget holds. We resolve the airflow that spreadsheet load calculations cannot see.
1 · Sector needs with respect to CFD
Comfort complaints and energy overruns usually come from local airflow behaviour, so the sector needs simulation that predicts draught, stratification and contaminant transport at occupant scale.
| REQUIREMENT | WHAT IT DEMANDS OF THE SIMULATION |
|---|---|
| Local thermal comfort | Predicted mean vote, draught rate and vertical temperature gradients at occupied positions rather than a single room average. |
| Ventilation effectiveness | Age of air, contaminant removal effectiveness and short-circuiting between supply and extract — the real measure of whether fresh air reaches people. |
| Stratification in tall spaces | Displacement and buoyancy-driven behaviour in atria, halls and industrial volumes where mixing assumptions collapse. |
| Diffuser and terminal selection | Throw, spread and entrainment behaviour of real terminal devices, including interaction between adjacent units. |
| Energy and load reduction | Quantifying the saving from setpoint, flow-rate or system-type changes without giving up compliance margins. |
2 · Typical representative cases
Diffuser layout, supply temperature and flow rates assessed for draught risk and uniformity across the occupied zone.
Cabin airflow, defrost and demist performance including solar load, occupant plumes and duct pressure losses.
Unidirectional flow integrity, recovery time and particle transport around equipment and staff for classified spaces.
Aisle containment, CRAC placement and leakage assessed for inlet temperature compliance and PUE improvement.
Capture efficiency of hoods and local extract for heat, fumes and moisture, including make-up air interaction.
Airborne contaminant dispersion between occupants, and the effect of ventilation rate, filtration and layout on exposure.
3 · Policy and standards verifiable through CFD
Simulation supports — and in several frameworks explicitly permits — demonstration of compliance. Acceptance criteria and validation evidence are agreed with you and the approving body before the study begins.
| FRAMEWORK | HOW CFD SUPPORTS VERIFICATION |
|---|---|
| ISO 7730 / EN 16798-1 | Thermal comfort and indoor environment. PMV/PPD, draught rate and local discomfort indices are computed directly from simulation results and compared with the category limits the project targets. |
| ASHRAE 55 | Thermal environmental conditions. Occupied-zone comfort criteria — including air speed and vertical gradient limits — verified at real occupant positions. |
| ASHRAE 62.1 / EN 16798-3 | Ventilation for acceptable indoor air quality. Ventilation effectiveness assumptions behind required outdoor air rates can be substantiated rather than taken from default tables. |
| ISO 14644-3 | Cleanroom test methods. Recovery, airflow visualisation and containment leak behaviour can be pre-assessed by simulation before qualification testing. |
| EPBD (EU 2024/1275) | Energy performance of buildings. Airflow-driven energy measures modelled to support the performance calculations and indoor-climate reporting the directive requires. |
A complete outsourcing solution: an engineering description of your problem, the geometry or area to analyse and the operating flow conditions are enough to start. All work is carried out by CompFlow personnel at company premises under strict bidirectional non-disclosure agreements, on in-house computing facilities including a 120-core cluster.
Engagement is project-based (predefined deliverables and deadlines) or yearly (a set number of consultancy hours). Related services: CFD Consulting · Code Development · Flow Measurements · 3D Design & Scan · CFD Training · CFD Support.