The determination of recovery efficiency for adsorption-based oil and gas recovery equipment is primarily aimed at evaluating the system's capacity to capture volatile oil and gas vapors. Testing is generally conducted using either the inlet-outlet concentration comparison method or the mass balance method to reflect actual operational performance.
The inlet-outlet concentration method involves collecting gas samples at both the inlet and outlet of the equipment, measuring the concentration difference of volatile organic compounds (VOCs), and calculating recovery efficiency based on gas flow rates. This method is relatively straightforward to implement and is commonly used in engineering testing.
The mass balance method evaluates the equipment's overall recovery capability by comparing the total amount of oil and gas entering the system with the total amount ultimately recovered or treated. This approach is better suited for system-level performance evaluation and reflects comprehensive efficiency under long-term operating conditions.
Factors such as adsorbent saturation, temperature, pressure, and flow rate fluctuations must be considered during testing, as they can influence the results. Consequently, multiple tests under stable operating conditions are typically required to ensure data accuracy and representativeness.
The testing process generally integrates standardized test methods with online monitoring systems, utilizing sensors to record key parameters in real time. This enables a scientific assessment and continuous optimization of the adsorption-based oil and gas recovery equipment's operational performance.