Abstract
Natural gas, the cleanest fossil fuel, is a bridge to renewable energy systems and has received strong attention. There are still some challenges in the production of liquefied natural gas. This article experimentally investigates the condensation friction pressure drop of hydrocarbon mixture fluids during the liquefaction process of natural gas. Analyzed the effects of factors such as vapor quality, mass flux, and operating pressure, observed the flow regimes in the spiral pipe using a visualization system, divided the condensation flow patterns into four types, and obtained conversion criteria. Subsequently, the accuracy of eleven classic prediction models of friction pressure drop was compared, and a global model of friction pressure drop suitable for hydrocarbon mixture fluids was developed, incorporating flow regime-based mode and general mode. The global model had a mean absolute relative deviation of 12.5 % and 17.3 % under flow regime-based mode and general mode, respectively. Compared with the experimental and published paper data, it was verified that over 80 % of the data points had errors within 20 %.
Published Version
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