HVAC PsychroLab
Android app by U Z A LEARN. Productivity · U Z A LEARN
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- 3.79 USD
- In-app purchases
- Not listed in captured metadata
- Version
- 1.0.0
- Listing last refreshed
- 2026-09-17
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Store description excerpt
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 d
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