Sun J., Feng X., Wang Y., 2015, Simultaneous Optimisation of Cooler and Pump Networks for Industrial Cooling-Water Systems, Chemical Engineering Transactions, 45, 1915-1920.
For a cooling water system (CWS), the cooling water (CW) from a cooling tower is supplied to the cooler network that usually has a parallel configuration. Re-use of CW between different coolers has been proved to be an effective way to reduce CW flow-rate and increase the capacity of cooling tower for a new design and retrofit. However, coolers with series configurations require a higher pressure head of the corresponding branch pipe. In order to minimise the power consumption, a novel methodology is proposed to simultaneously consider CW reuse exploration in the cooler network and pump arrangement in the pump network. The total annualised cost of cooling water systems (CWSs) is taken as its objective function, including CW cost, pumping cost and capital cost of coolers and pumps. A superstructure of CWSs is developed to consider the interactions between the design of cooler network and the performance of pumps. The proposed model is tested by a case study based on the simplified CWS of a refinery.
