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第八讲 换热网络的合成(下) 作者在连载的第七讲中,从热力学角度介绍了B.Linnhoff的换热网络合成方法,并指出了这一方法的热力学实质;用η_t和△Ω两个指标来评价网络在能量利用数量和质量方面的优劣。 作者在本讲中将继续介绍这一方法。 我们注意到在节点温度处,上一区对下一区无传热量,这样便把整个网络分解为节点之上和节点之下两个子系统(如第七讲中图2(b)和图4(b)所示)。此时,在给定的决策变
Chapter 8 Synthesis of Heat Exchanger Networks (Part 2) In the seventh lecture of the series, the author introduced the method of heat exchanger network synthesis from B. Linnhoff from a thermodynamic point of view, and pointed out the thermodynamics of this method; using η_t and △ Ω Two indicators to evaluate the strengths and weaknesses of the network in terms of energy use quantity and quality. The author will continue to introduce this method in this lecture. We notice that at the node temperature, the previous zone has no heat transfer to the next zone, so the entire network is decomposed into two sub-systems above and below the node (as shown in Figure 2(b) and Figure 4 in the seventh lecture. (b) shown). At this point, the given change in decision