What does EnerTherm Engineering do?

EnerTherm Engineering is a UK-based industrial engineering company that designs and delivers thermal process solutions, energy auditing services, and bespoke thermal equipment for manufacturing and process industries. Services include energy audits, pinch analysis, process modelling, thermal design simulation, and project management.

What thermal products does EnerTherm Engineering manufacture?

EnerTherm Engineering manufactures process heaters, heat exchangers, thermal oxidisers, incinerators, condensers, dehydrators, and the Omni Vision industrial energy intelligence platform. All products are custom-designed for specific industrial applications and process requirements.

Does EnerTherm Engineering provide energy auditing services?

Yes. EnerTherm Engineering provides comprehensive energy audits, heat loss audits, and pinch analysis to identify energy waste, quantify potential savings, and prioritise capital investments in industrial facilities across sectors including chemical, pharmaceutical, food & beverage, and manufacturing.

What industries does EnerTherm Engineering serve?

EnerTherm Engineering serves chemical processing, pharmaceutical, food & beverage, oil & gas, power generation, automotive, textile, paper & pulp, general manufacturing, waste management, agriculture, healthcare, and mining & metals industries.

Where is EnerTherm Engineering located?

EnerTherm Engineering is headquartered in the United Kingdom and provides engineering services and thermal equipment to clients internationally.

Can EnerTherm Engineering help with industrial decarbonisation?

Yes. EnerTherm Engineering specialises in waste heat recovery system design, process optimisation for energy reduction, and net zero carbon roadmapping. They also provide ISO 14001 and ISO 50001 compliant energy management strategies.

does EnerTherm Engineering offer CFD simulation and thermal modelling?

Yes. EnerTherm Engineering provides Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) for thermal equipment design. These simulations validate heat transfer performance before fabrication, reducing costly physical prototyping.

What is a thermal oxidiser and does EnerTherm Engineering supply them?

A thermal oxidiser is an industrial system that destroys volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) through controlled high-temperature combustion. EnerTherm Engineering designs and manufactures regenerative, recuperative, and direct-fired thermal oxidisers for chemical, pharmaceutical, and manufacturing industries.

Does EnerTherm Engineering design custom process equipment?

Yes. EnerTherm Engineering provides bespoke engineering design of process vessels, heat exchangers, reactors, and thermal treatment systems from concept through to fabrication-ready drawings, as well as rapid prototyping and pilot plant commissioning.

What is EnerTherm Engineering's Omni Vision platform?

Omni Vision is EnerTherm Engineering's industrial energy intelligence platform. It provides turnkey utility metering, CO2 tracking, and AI-powered production KPI intelligence for industrial compliance monitoring and operational optimisation.

←All calculators

[Heat Transfer]

Free tool

Forced Convection

Six forced-convection calculators: flat plates, cylinders and square rods in cross-flow, developing and fully-developed tube flow, and PCB component arrays — average h and heat rate with real fluid properties.

[FREE_TOOLS]

Built by our engineers

Part of EnerTherm's free calculator suite — the same methods we use on live industrial projects.

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More tools, always free

Instant results in your browser, no sign-up. New calculators added regularly.

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[FIELD_NOTE]

In turbulent flow h scales with velocity to the power 0.8 — doubling the air speed buys you roughly 75% more heat transfer, not double.

[LIVE_TOOL]Results update as you type

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Results are indicative

Figures assume typical conditions and the stated method. For measured, guaranteed numbers on your plant, our engineers run site surveys, heat loss audits, and full process models.

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Send us the result — we'll tell you what it means for your plant.

[ABOUT_THIS_TOOL]

Forced-convection sizing comes down to one question: what is the heat transfer coefficient h? These six tools answer it for the classic external and internal geometries, using the standard engineering correlations with real fluid properties evaluated by an embedded CoolProp property database.

What's in this suite

Flat Plate — Isothermal — average h and heat rate for a plate in free-stream flow; switches automatically between laminar and mixed laminar–turbulent regimes at $R e_{L} = 5 \times 1 0^{5}$ .
Cylinder Cross-Flow — Isothermal — Hilpert's correlation with Reynolds-banded constants, from $R e$ = 0.4 to 400 000.
Square Rod Cross-Flow — Isothermal — the square-prism variant ( $C$ = 0.102, n = 0.675, face normal to flow).
Fully-Developed Tube Flow — $N u = 4.36$ in laminar flow; the Gnielinski correlation for $2300 \leq R e < 5 \times 1 0^{6}$ .
Developing Tube Flow — combined-entry-length treatment from an abrupt square entry, bridging to the fully-developed limit.
PCB Component Array — case temperature of surface-mounted components in a forced-air channel, using Will's correlation ( $h = G u_{m}^{0.8}$ ) with local air-temperature rise, fin efficiency and interface resistance.

Method

All external-flow tools follow the same chain. Fluid properties are evaluated at the film temperature

T_{f} = \frac{T _{s} + T _{\infty}}{2}

then the Reynolds number fixes the regime, a Nusselt correlation of the form

N u = C R e^{n} P r^{1/3}

gives the dimensionless coefficient, and $h = N u \cdot k / L$ converts it back to W/m²·K. The heat rate is $Q = h A (T_{s} - T_{\infty})$ . Internal-flow tools use the bulk-to-wall film temperature and, in the turbulent range, the friction-factor-based Gnielinski form, accurate to roughly ±10% over its stated range.

Assumptions

Uniform surface temperature, uniform free stream, smooth surfaces. Correlations are empirical fits — expect ±10–25% agreement with measurement depending on geometry and Reynolds range. Sources: Holman, Heat Transfer (1990); Incropera & DeWitt, Fundamentals of Heat and Mass Transfer.

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Need this tool, but deeper?

We build advanced versions on request — your fluids, your geometry, your standards, validated against plant data.

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Missing a calculator?

Tell us what you're sizing or estimating — we build the calculators engineers actually ask for.

[FAQ]

Frequently asked questions

Fluid properties like viscosity and conductivity change strongly with temperature, so correlations specify evaluating them at the film temperature — the average of the surface and free-stream (or wall and bulk) temperatures. The tools do this automatically through the built-in property database.

Any fluid in the embedded CoolProp property database — air, water, CO₂ and other common industrial fluids — with density, viscosity, conductivity and Prandtl number evaluated at the film temperature and pressure you set.

The Gnielinski correlation, valid for Reynolds numbers between 2 300 and 5 million, built on the Petukhov friction factor. It is generally accurate to about ±10% and supersedes the older Dittus–Boelter form. Laminar flow uses the exact constant-heat-flux result Nu = 4.36.

The underlying correlations are empirical fits to experimental data; ±10–25% is typical depending on geometry and Reynolds range. Treat the outputs as sizing estimates — for guaranteed numbers on a specific piece of plant, measurement or CFD validated against operating data is the next step.