分会场

高效清洁燃烧

摘要

Thermochemical exhaust heat recovery is a promising way to improve thermal efficiency of Stirling engines. A simulation model based on Aspen HYSYS is established to calculate the efficiency of the thermochemical recuperation system. The results show that the simulation data obtained by the model are in good agreement with the experimental data. With increased reforming temperature, the equilibrium conversion rate of n-heptane gradually increases. For temperatures from 460 ℃ to 560 ℃, as S/C increases from 1 to 2, the effect of temperature increase on the equilibrium conversion rate of n-heptane increased, and the heat for production increases by twofold. When the reforming temperature increases to 560 ℃ at S/C=2, external heat is needed to meet the heat balance of steam reforming. When the reforming temperature is given, increased pressure reduces the equilibrium conversion rate of n-heptane and the heat of the reforming reaction. At the same temperature, with the increase of reforming pressure of 1MPa, the heat of the reforming reaction decreases by over 3 kW.

关键词

Underwater Stirling engines; Large displacement unmanned undersea vehicles (LDUUV); Thermochemical recuperation

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