HVAC PsychroLab

HVAC PsychroLab is a specialized offline engineering and field calculation application designed for HVAC/R engineers, commissioning technicians, and mechanical professionals. The application operates entirely without an internet connection, storing all calculation data locally on your device.

Key Engineering Features:

1. Interactive Psychrometric Engine
• Calculates thermodynamic air state properties using ASHRAE and Hyland-Wexler formulations.
• Computes dry-bulb temperature, wet-bulb temperature, dew point, relative humidity, humidity ratio, specific enthalpy, and specific volume.
• Models fundamental air conditioning processes: sensible heating, sensible cooling, cooling coil dehumidification with Apparatus Dew Point (ADP) determination, steam humidification, evaporative cooling, and mass-weighted dual-stream air mixing.
• Interactive graphical chart with touch crosshair navigation and thermal comfort zone reference.

2. Refrigeration Pressure-Temperature (P-T) Engine
• Saturation curves and thermodynamic tables for over 30 refrigerants, including HFCs, HCFCs, HFOs, natural refrigerants, and modern A2L blends (R-32, R-454B, R-1234yf, and more).
• Calculates bubble point, dew point, and temperature glide for non-azeotropic blends.
• Evaluates evaporator superheat and condenser subcooling against target operating benchmarks.

3. Rule-Based Diagnostic Engine
• Evaluates 14 mechanical and thermodynamic field symptoms (operating pressures, temperatures, line temperatures, and airflow indicators).
• Identifies primary fault domains: refrigerant undercharge, overcharge, liquid line restrictions, metering device malfunctions, evaporator or condenser airflow restrictions, non-condensables, and compressor inefficiency.
• Provides confidence metrics, diagnostic explanations, and recommended field inspection steps.

4. Offline Error Code Reference
• Built-in database of manufacturer fault codes across 15 global HVAC equipment brands.
• Provides probable cause descriptions and sequential troubleshooting steps directly on-site without requiring internet connectivity.

5. Suite of 23 Field Engineering Calculators
• Air Systems: Airflow (CFM / L/s), sensible, latent, and total heat loads, target Delta-T across cooling coils, and outdoor air ventilation rates (ASHRAE 62.1).
• Refrigeration: Line set charge adjustments, A2L safety and maximum charge limits (ASHRAE 15 and EN 378), compression ratios, and suction line pressure drops.
• Air Distribution & Ductwork: Equal friction and velocity duct sizing, Colebrook-White friction losses, duct leakage test compliance, and fan affinity laws.
• Hydronics & Electrical: Chilled/hot water flow rates, pump head, motor power draw, coefficient of performance (COP), run capacitor testing, and 3-phase voltage imbalance.
• Environmental: Atmospheric pressure adjustments based on field elevation.

6. Client PDF Inspection Reports
• Generates standardized inspection and commissioning reports in PDF format directly from your device.
• Includes project details, measurement records, diagnostic findings, and psychrometric summaries.
• Ready for immediate local saving or sharing via installed device applications.

Privacy and Operation:
• 100% Offline: No account registration, cloud dependencies, or background data collection.
• Multilingual Interface: Fully localized support for English, Arabic, Turkish, German, French, and Dutch with complete right-to-left (RTL) layout compatibility.