Design of water and heat recovery networks for the simultaneous minimisation of water and energy consumption
Design of water and heat recovery networks for the simultaneous minimisation of water and energy consumption
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DOI：
10.1016/j.applthermaleng.2010.03.031
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发表时间：
2010-11
影响因子：
6.4
通讯作者：
G. Polley;M. Picón-Núñez;José de Jesús López-Maciel
中科院分区：
文献类型：
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作者：
G. Polley;M. Picón-Núñez;José de Jesús López-Maciel
本文描述了水和能源消耗占运营成本很大一部分的工艺设计程序。良好的工艺设计可以具有许多特性，其中最重要的是：原材料的有效利用、低资本成本和良好的可操作性。根据热力学分析，这些过程可以被描述为“夹点”问题或“阈值”问题。本文重点关注阈值类型问题的开发设计。以前的工作人员讨论的大多数问题都是这种类型。考虑到这些特性，这项工作着眼于综合水和能源系统的设计，该系统具有以下特点：1. 最小的水消耗，2. 最小的能源消耗，3. 简单的网络结构。该方法适用于单一污染物。结果表明，节水问题和热回收问题可以解耦，首先应建立节水方案。结果表明，系统所需的加热器和热回收单元的数量、工厂所需热设施的数量和类型以及热回收网络的复杂性都可以确定，而无需设计任何热回收网络。这使得工程师可以在开始设计热回收网络之前选择更好的节水选项。对于此类问题，热回收网络本身的设计通常简单明了。
This paper describes procedures for the design of processes in which water and energy consumption form a large part of the operating cost. Good process design can be characterised by a number of properties, amongst the most important are: efficient use of raw materials, low capital cost and good operability. In terms of thermodynamic analysis these processes can be characterised as being either a “pinch” problem or a “threshold” problem. This paper concentrates on developing designs for problems of the threshold type. Most of the problems discussed by previous workers have been of this type. With these properties in mind this work looks at the design of integrated water and energy systems that exhibit the following features: 1. minimum water consumption, 2. minimum energy consumption, and 3. simple network structure. The approach applies for single contaminant. It is shown that the water conservation problem and the heat recovery problems can be de-coupled and the water conservation options should be established first. It is then shown that the number of heaters and heat recovery units required for the system, the quantity and type of hot utility needed for the plant and the complexity of the heat recovery network can all be determined without having to design any heat recovery network. This allows the engineer to select the better water conservation option before embarking on the design of the heat recovery network. For this type of problem the design of the heat recovery network itself is usually simple and straightforward.