Pipeline Modeling - Impact of Ambient Temperature and Heat Transfer Modeling

摘要

The impact of different methods for modelling heat transfer between apipeline and the ambient is investigated. The differences in outlettemperatures between a steady and an unsteady heat transfer model arequantified, as well as the effects of simulating the annual oceanictemperature cycle over several years. A seasonal difference betweenmeasured and modeled outlet temperature is found. The results showthat the absence of the heat storage term in the heat transfer model mayonly be a small contributing factor to this difference. Assuming theerror is caused by inaccuracies in the ambient temperature, the impacton the capacity is found to be between 0.1 and 0.5 %.