Due to the low inlet temperature, the heat loss of liquid carbon dioxide is negative. Due to the influence of Joule-Thomson effect, the temperature will always decrease, and the magnitude of primary heat loss will also increase with the increase of transportation distance. On the contrary, in supercritical state, due to the high inlet temperature, the heat loss is positive, that is, it releases heat to the outside world. When the pipeline transportation distance exceeds 400km, the heat loss reaches a stable state, while in gaseous state, when the transportation length is less than 47.5km, Due to the higher temperature, the heat loss is positive, but with the increase of distance, the pressure further decreases. Due to the prominent Joule-Thomson effect, the temperature of the medium will drop below the ambient temperature, thus the heat loss is negative, and it is manifested as absorbing heat from the environment.
正在翻译中..