Thermal System Optimizer

Learn / examples

Load a complete starting case, calculate it, then change one assumption at a time. The examples are editable and are not design recommendations.

Project nameSite name

Examples are editable. The severe-winter example uses explicit screening assumptions and does not replace the project BoD, EPW/TMY, hydrogeology or utility agreement.

Building / room load

Building use Conditioned floor area, m² Storeys Storey height, m Aspect ratio L/W Glazing fraction Envelope Glazing Indoor design, °C Outdoor design, °C People override Outdoor air override, m³/h

Not calculated

Screening result

Total H—W/K

Specific H—W/(m²·K)

Design heat loss—kW

People—persons

Outdoor air—m³/h

Outdoor air / person—m³/(h·person)

Envelope decomposition

Opaque envelope	—	W/K
Windows	—	W/K
Effective infiltration / ventilation prior	—	W/K
Wall / window / roof / floor area	—	m²
U wall / window / roof / floor	—	W/(m²·K)
Lighting / equipment prior	—	W/m²

The preset outdoor-air requirement is reported separately from the envelope estimator's effective ACH term; the two are not added here, avoiding an implicit double count. Cooling load is not yet exposed in this slice.

Annual building dynamics (2R2C)

Roa is derived from the screening heat-loss coefficient H. Ram and the two effective capacitances are explicit project inputs. No construction-derived value is inserted by this prototype.

Ram, K/kW Cair, MJ/K Cmass, MJ/K Initial air, °C Initial mass, °C Comfort min, °C Comfort max, °C

Annual climate basis

Climate profile Profile provenance Monthly mean outdoor, °C Monthly mean daily swing, K

First bounded candidate search

Electricity availability Firm electric import, kW Natural gas Firm gas input, kW Delivered fuel Plant families Heat-source families Free-cooling families Heating terminals Cooling terminals Cooling reserve factors Retain top Near-optimal band, % Cooling local step

Lifecycle economics

These values are used in annual energy cost and net-present-cost ranking; they are saved with the project and printed in the Basis of Design report.

Analysis period, years Real discount rate, % Energy escalation, %/y Electricity price, €/kWh Gas price, €/kWh

Expert family priors / site sources

Terminal priors are editable screening assumptions. Ground/source-water families are suppressed unless complete explicit source records are supplied. Borefield geometry/search choices and Rb, water-temperature profile and HX geometry are never inferred.

Ground source Ground undisturbed, °C Ground effective C, MJ/K Ground recovery τ, days Ground Tmin, °C Ground Tmax, °C Ground approach, K Max extraction, kW Max injection, kW Ground pump, W/kW Ground/source CAPEX, € Direct ground cooling Ground geometry provenance Borefield geometry / bounded search JSON Source water Source name Monthly water temperatures, °C Project hourly profile ref Hourly water temperatures, °C Temperature-profile provenance Source-water nameplate cap, kW Minimum outlet temperature, °C Externality / agreement note Source-side piping / hydraulics JSON HX geometry provenance

Specify exactly one source-water temperature input: hourly series, project profile reference, or monthly fallback. Hourly length must exactly match the 8760/8784 project calendar.

Direct-HX geometry JSON VRF screening VRF heat recovery

Family-prior overrides JSON Physical switching-threshold brackets JSON Physical profile / source geometry variants JSON

No physical threshold is inferred unless an explicit bracket is supplied. Each trial reruns both candidates annually and re-screens source physical feasibility.

Dynamics required

Load a complete case and run the comparison. The result will show a recommended concept plus credible alternatives and source constraints.

Candidate	Feasible	Why not	NPC €	CAPEX €	Grid MWh/y	Peak grid kW	Gas MWh/y	DHW backup	DHW MWh/y	Water heat MWh/y	Min outlet °C	Max ΔT K	Unserved kWh/y
Enter Ram, Cair and Cmass to generate a project-derived ensemble.

Near-optimal / robustness

Run the candidate comparison to evaluate the near-optimal set against the kernel sensitivity scenarios. Scenario weights are engineering weights, not probabilities.

Alternative	Base ΔNPC	Wins	Within band	Physical feasible	Physical issues	Mean regret	Max regret
No robustness result yet.

Physical-source thresholds

Not requested. Supply an explicit bracket in Candidate search assumptions.

Alternative	Axis	Event	Boundary / variant	ΔNPC	Failed candidate / physical issue
No physical-source threshold result.

Healthcare / residential program

Shown only for use types that require an explicit room or dwelling program. Rates and provenance are project inputs; no jurisdictional ventilation values are supplied by this editor.

Current use type does not require a special program.

Annual coupling

Ventilation schedule Sensible OA coupling Exhaust replacement Exhaust recovery effectiveness Enforce room T/RH constraints DHW coupling DHW cold water, °CDHW target, °C

Not run

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Benchmark data

Canonical scoped benchmark results are shipped as benchmarks/thermaloptimizer.json.

benchmarks/thermaloptimizer.json