State unloading port provision is made for vaporization

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Reference no: EM13180221

Large quantities of liquefied natural gas (LNG) are shipped by ocean tanker. At the unloading port provision is made for vaporization of the LNG so that it may be delivered to pipelines as gas. The LNG arrives in the tanker at atmospheric pressure and 113.7 K, and represents a possible heat sink for use as the cold reservoir of a heat engine. For unloading of LNG as a vapor at the rate of 9000 m3 s-I, as measured at 298.15 K (25°C) and 1.0133 bar, and assuming the availability of an adequate heat source at 303.15 K (30°C), what is the maximum possible power obtainable and what is the rate of heat transfer from the heat source? Assume that LNG at 298.15 K (25°C) and 1.0133 bar is an ideal gas with the molar mass of 17. Also assume that the LNG vaporizes only, absorbing only its latent heat of 512 kJ kg-' at 113.7 K. Maximum power possible is that of a carnot engine.

Reference no: EM13180221

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