CoolProp-OOP

An object-oriented wrapper for CoolProp thermodynamic properties. This library provides an intuitive, Pythonic interface to CoolProp's functionality for both humid air and pure fluid property calculations.

Features

• Object-oriented interface to CoolProp's functionality
• Property validation to prevent physically impossible states
• All thermodynamic properties are directly settable - enthalpy, entropy, and any other property can be used as a constraint
• Automatic caching of calculated properties for better performance
• Support for both Humid Air (StateHA) and Pure Fluids (StateProps)
• Comprehensive state validation with helpful error messages
• Fully Pythonic API with property-based getters and setters

CoolProp-OOP provides an intuitive, object-oriented interface to CoolProp's thermodynamic property calculations for both humid air and pure fluids. It simplifies property access and calculations through two main classes: StateHA for humid air properties and StateProps for pure fluid properties.

Installation

pip install coolprop-oop

Features

• Easy-to-use object-oriented interface
• Simple property constraint management
• Support for both humid air and pure fluid calculations
• Consistent SI unit system
• Compatible with CoolProp 6.7.0

Usage

Humid Air Properties

from coolprop_oop import StateHA

# Create a state for humid air at 25°C, 1 atm, 60% RH
state = StateHA('T', 298.15, 'P', 101325, 'R', 0.6)

# Access properties using property codes
humidity_ratio = state.get('W')
wet_bulb = state.get('B') - 273.15  # Convert to Celsius
enthalpy = state.get('H')

# Get multiple properties in one call
temp, pressure, rel_humidity = state.get('T', 'P', 'R')

# View current constraint values
constraints = state.constraints()
print(constraints)  # {'T': 298.15, 'P': 101325, 'R': 0.6}

# Update a constraint
state.reset('T', 303.15)  # Change temperature to 30°C

# Replace a constraint with a different property
state.replace('R', 'W', 0.015)  # Replace RH with humidity ratio

Pure Fluid Properties

from coolprop_oop import StateProps

# Create a state for water at 100°C, 1 atm
water = StateProps('T', 373.15, 'P', 101325, 'water')

# Access properties using property codes
density = water.get('D')
enthalpy = water.get('H')
entropy = water.get('S')

# Get multiple properties in one call
temp, pressure = water.get('T', 'P')

# View current constraint values
constraints = water.constraints()
print(constraints)  # {'T': 373.15, 'P': 101325, 'fluid': 'water'}

# Update a constraint
water.reset('T', 393.15)  # Change temperature to 120°C

# Replace a constraint with a different property
water.replace('P', 'D', 900.0)  # Replace pressure with density

Property Codes (CoolProp 6.7.0)

Humid Air Properties (StateHA)

• 'T': Temperature [K]
• 'P': Pressure [Pa]
• 'W': Humidity ratio [kg/kg dry air]
• 'R': Relative humidity [0-1]
• 'D': Dew point temperature [K]
• 'B': Wet bulb temperature [K]
• 'V': Specific volume [m³/kg dry air]
• 'H': Specific enthalpy [J/kg dry air]
• 'S': Specific entropy [J/kg dry air/K]
• 'C': Specific heat capacity [J/kg dry air/K]

Pure Fluid Properties (StateProps)

• 'T': Temperature [K]
• 'P': Pressure [Pa]
• 'D': Density [kg/m³]
• 'H': Specific enthalpy [J/kg]
• 'S': Specific entropy [J/kg-K]
• 'Q': Vapor quality [-]
• 'C': Specific heat capacity at constant pressure [J/kg-K]
• 'O': Specific heat capacity at constant volume [J/kg-K]
• 'U': Specific internal energy [J/kg]

License

MIT

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.