🧍 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
Hvac
📊 Solver Telemetry
● ACTIVE
🧍 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)
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%)
• 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
Predicted Mean Vote (PMV)
PMV = NaN
🚨 NON-COMPLIANT (Thermal Discomfort / Stress)
PPD = NaN %
Clothing Surface Temp (Tcl)
NaN °C
Skin Temp ~ 33.7 °C
Body Thermal Balance Load (L)
NaN W/m²
Heat Imbalance
Operative Temperature (Top)
20.0 °C
½ (Ta + Tr)
Metabolic Heat Rate
98.9 W/m²
1.70 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 : Shopping Mall / Retail Store Active Customer Air Temperature (Ta) : 20.00 °C Mean Radiant Temp (Tr) : 20.00 °C Relative Air Velocity : 0.25 m/s (49.2 FPM) Relative Humidity (RH) : 50.0 % Metabolic Activity Rate : 1.70 met (98.9 W/m2) Clothing Insulation (clo) : 0.70 clo (0.108 m2.K/W) ----------------------------------------------------------------- Clothing Surface Temp (Tcl): NaN °C Thermal Imbalance Load (L) : NaN W/m2 PREDICTED MEAN VOTE (PMV) : NaN PREDICTED DISSATISFIED PPD : NaN % Comfort Classification : 🚨 NON-COMPLIANT (Thermal Discomfort / Stress) =================================================================
📘 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.