🧍 Thermal Comfort (PMV & PPD)

Evaluate indoor thermal comfort based on Fanger's 6-parameter model (ISO 7730 / ASHRAE 55), computing Predicted Mean Vote and Predicted Percentage Dissatisfied.

⚡ Fortran 90 Engine Double Precision (IEEE 754) ✓ ISO / ASME Validated

📊 Solver Telemetry ● ACTIVE

👁️ Consultations 23

⚡ Calculs faits 21

💾 Téléchargements 150 📦 Code Fortran 4.4 KB

📅 Mise en service Jun 2026

⏱️ Latence < 1 ms

🧍 Fanger Thermal Comfort Mannequin & 7-Point PMV Gauge

Real-time thermal radiation exchange, convective heat loss & ISO 7730 comfort zones

📝 Configuration & Presets

☀️ Summer Office (24.5°C / 0.5 clo) ❄️ Winter Office (21°C / 1.0 clo) 🛍️ Retail Active (1.7 met) 🌀 Ceiling Fan (0.8 m/s)

🌡️ Thermal Environmental Parameters

Air Temperature T_a [°C]:

Mean Radiant Temp T_r [°C]: Surrounding surface temperatures

Relative Air Velocity v_rel [m/s]: Still indoor air: 0.10 to 0.20 m/s

Relative Humidity RH [%]:

🏃 Occupant Activity & Clothing Insulation

Metabolic Rate [met]: Seated office: 1.0-1.2, Standing: 1.4-1.8

Clothing Insulation [clo]: Summer: 0.5 clo, Winter: 1.0 clo

Fanger ISO 7730 Formulations:
• PMV = [0.303 · e^{−0.036 M} + 0.028] · L [−3 to +3]
• PPD = 100 − 95 · exp(−0.03353 PMV⁴ − 0.2179 PMV²) [%]
• Cat A: |PMV| ≤ 0.2 (PPD ≤ 6%)
• Cat B: |PMV| ≤ 0.5 (PPD ≤ 10%)

📊 Thermal Comfort Results

📊 Output Summary
💾 Fortran Source

Predicted Mean Vote (PMV)

PMV = -0.40

✅ ISO 7730 Category B (PPD ≤ 10% — Normal Standard)

PPD = 8.3 %

Clothing Surface Temp (T_cl) 29.93 °C Skin Temp ~ 33.7 °C

Body Thermal Balance Load (L) -6.80 W/m² Heat Imbalance

Operative Temperature (T_op) 24.8 °C ½ (T_a + T_r)

Metabolic Heat Rate 64.0 W/m² 1.10 met

📈 Predicted Mean Vote (PMV) vs Air Temperature

📉 Predicted Percentage of Dissatisfied (PPD) vs PMV

=================================================================
 THERMOFLUIDCALC — ISO 7730 / ASHRAE 55 THERMAL COMFORT REPORT
=================================================================
Case Title                 : Commercial Office Standard Summer Comfort
Air Temperature (Ta)       : 24.50 °C
Mean Radiant Temp (Tr)     : 25.00 °C
Relative Air Velocity      : 0.15 m/s (29.5 FPM)
Relative Humidity (RH)     : 50.0 %
Metabolic Activity Rate    : 1.10 met (64.0 W/m2)
Clothing Insulation (clo)  : 0.50 clo (0.077 m2.K/W)
-----------------------------------------------------------------
Clothing Surface Temp (Tcl): 29.93 °C
Thermal Imbalance Load (L) : -6.80 W/m2
PREDICTED MEAN VOTE (PMV)  : -0.397
PREDICTED DISSATISFIED PPD : 8.28 %
Comfort Classification     : ✅ ISO 7730 Category B (PPD ≤ 10% — Normal Standard)
=================================================================

📘 Calculation Methodology & ISO 7730 Standards

The Fanger 6-Parameter Model

Combines physiological skin heat loss, dry/latent respiration, radiative exchange with walls, and convective heat transfer to compute the net thermal load $L$:

                    PMV = [0.303 · e−0.036 M + 0.028] · L
                

ISO 7730 Comfort Categories

Category A: $-0.2 \le PMV \le +0.2$ ($PPD \le 6\%$) — Premium spaces.
Category B: $-0.5 \le PMV \le +0.5$ ($PPD \le 10\%$) — New commercial buildings.
Category C: $-0.7 \le PMV \le +0.7$ ($PPD \le 15\%$) — Existing buildings.

Key Engineering Assumptions

Steady-state human body thermal equilibrium.
External mechanical work $W = 0\,\text{W/m}^2$.
Uniform clothing distribution across body surface.

ThermoFluidCalc Engineering Report