Precision Thermodynamic
Analysis for Everyone
PsychroLab was created to replace outdated, heavy desktop software with a fast, modern, and accessible web-based workspace for mechanical engineers, HVAC designers, and engineering students.
ASHRAE Standard Math
Built directly on published ASHRAE 2017 Chapter 1 formulations for accurate moist air calculation across standard and high-altitude conditions.
Zero Installation
Instantly accessible in any modern web browser or tablet without software licenses, heavy installers, or active server requirements.
Modern Developer Stack
Engineered with SvelteKit and client-side execution to ensure instantaneous UI updates, 60 FPS chart interactions, and light resource usage.
What PsychroLab Solves
Targeted tools designed for practical HVAC workflows and academic engineering
Sensible & Latent Heat Calculations
Evaluate air handling unit (AHU) cooling coils, heating elements, and humidifiers by analyzing process deltas ($\Delta T_db$, $\Delta W$, $\Delta h$, $\Delta RH$). Compute total coil capacity, sensible heat ratios (SHR), and moisture removal rates instantly.
Carrier Psychrometric & DIN Mollier Charts
Switch effortlessly between standard Carrier-style temperature vs. humidity ratio charts used in North America and oblique enthalpy Mollier ($h$-$x$) diagrams common in European engineering standards (DIN 4107).
Off-Standard Atmospheric Pressure
Standard sea-level charts fail at high altitudes. PsychroLab dynamically recalibrates atmospheric pressure and elevation parameters, recomputing moist air density, saturation vapor pressure, and specific volume on the fly.
Built for Students & Instructors
Designed not just to give an answer, but to help students understand thermodynamics. Tabular state outputs provide full parameter breakdowns ($T_db, T_wb, T_dp, RH, W, h, v, p_v$), making textbook problem verification simple.
Formulations & Calculation Standards
PsychroLab solves moist air properties using high-order polynomial formulations derived from standard thermodynamic relations. Calculations are accurate across freezing ranges (-100°C to 0°C) and normal atmospheric ranges (0°C to 200°C).