The Liquid Ethylene Density Calculator is an engineering and chemical property tool that estimates the density of liquid ethylene (C₂H₄) at a given temperature and pressure. Liquid ethylene is widely used in petrochemical processing, cryogenic storage, polymer production, and industrial refrigeration systems.
This calculator helps engineers, researchers, and technicians quickly determine density values required for design calculations, storage planning, and safety assessments.
Density is the mass per unit volume of a substance. For liquid ethylene, density varies significantly with temperature and pressure, especially near its boiling point. Understanding liquid ethylene density is critical for:
Storage tank design
Flow measurement
Heat transfer calculations
Safety and hazard analysis
Accurate density values ensure efficient and safe handling of cryogenic and pressurized ethylene.
The calculator uses temperature-dependent empirical correlations derived from thermodynamic data:
Density (ρ) = Mass / Volume
Temperature Dependence (Simplified Correlation):
ρ = ρ₀ [1 − β (T − T₀)]
Pressure Correction (Compressibility Factor):
ρ = ρ × (1 + κ (P − P₀))
Where:
ρ = liquid density
ρ₀ = reference density at temperature T₀
β = thermal expansion coefficient
κ = compressibility factor
T = temperature
P = pressure
These relationships estimate how density changes with temperature and pressure.Suppose liquid ethylene has:
Reference density (ρ₀) = 570 kg/m³ at 110 K
Temperature = 120 K
Thermal expansion coefficient (β) = 0.002 K⁻¹
Step 1: Apply temperature correction
ρ = 570 × [1 − 0.002 × (120 − 110)]
Step 2: Calculate
ρ = 570 × (1 − 0.02) = 570 × 0.98
Result: Density ≈ 559 kg/m³
This value can then be used in engineering design calculations.