Loading...

Development of an Optimization Model Based on Superstructure for the Integration of Water and Energy Networks in Process Industries

Torkfar, Fardin | 2016

636 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48601 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Avami, Akram
  7. Abstract:
  8. Lack of resources, environmental limitations, the incresed price of the water used by industrial processes, and the growth of the industry have caused the necessity of minimizing the heat and water consumption in industries become more vital. Therefore, in addition to the methods of energy integration for reducing the energy consumption, some other methods are being utilized to minimize the required fresh water or the production of the waste water in the industries. Studies show that regarding the direct impact that these two objects have on each other, a separate minimization of them cannot lead to the total optimization of the system. Thus, their minimization should be achieved while involving both objects. This project presents a simultaneous methodology for the optimal design of integrated heat and water networks in process industries. The objective of the model is to minimize the total annual costs. To accomplish this task, a new superstructure is proposed which follows the energy and mass streams from the resources to sinks that enables us to consider heat exchange between streams in two separate stages of the HENS before and after mixers. Furthermore, heat recovery from wastewater is considered. Also, pressure drops in heat exchangers and related power costs are considered. Optimum velocity and heat transfer coefficients for the streams in heat exchangers is determined and the results are in good agreement with the literature. At last, exergy destruction in mixers and heat exchangers is considered and the model is solved again. It may be concluded that pressure drop considerations have little effect on the structure. However, the operational variables move toward more realistic optimal values. Also, exergy destruction in objective function causes heat exchangers to be less in numbers and more in area. By using this model, heat and water consumption beside total annual cost of process industries is minimized and causes development in that industry
  9. Keywords:
  10. Process Integration ; Heat Integration ; Processing Industry ; Exergy Analysis ; Superstructure ; Pressure Drop ; Energy Consumption Reduction ; Water Conservation ; Water Integration

 Digital Object List

 Bookmark

No TOC