Vapor Space Temperature Research Articles

Evaporation of cryogen in open storage tank: experimental and analytical studies

ABSTRACT While storing cryogens at atmospheric pressure, the key parameters governing the ullage space temperature profile are the heat leak rate, the rate of evaporation of liquid and release of vapor to maintain an isobaric state, and the initial fill-level. An analytical model, based on the basic thermodynamic laws, is proposed. The model is capable of predicting the spatial and temporal variations of temperature in the ullage space. An experimental test rig is designed exclusively to record the vapor space temperature profile with the evaporating liquid nitrogen maintained at atmospheric pressure. Experimental data and the simulated results are in excellent agreement.

Corrosion in Light Oil Storage Tanks

Abstract The most important factors governing corrosion rates in oil storage tanks are solubility of oxygen in the oil, rate of working, type of roof used, vapor pressure of the oil, and location of the tank (climatic conditions.) Data are given to show the relationship between stocks contained in tanks versus corrosion rate, and size and location of tanks versus corrosion rate. A corrosion mechanism is considered briefly. Corrosion control measures discussed include gas blanketing, inhibitors, breathing systems and protective coatings. Other topics considered include corrosion below the liquid level, vapor space effects, temperature effects and plate thickness corrosion allowance. 4.4.6