A detailed optimization model for combined cooling, heat and power system operation planning

Aldo Bischi, Leonardo Taccari, Emanuele Martelli, Edoardo Amaldi, Giampaolo Manzolini, Paolo Silva, Stefano Campanari, Ennio Macchi

Research output: Contribution to conferencePaperpeer-review

4 Citations (Scopus)

Abstract

A detailed optimization model is presented for planning the operation of combined cooling, heat and power (CCHP) energy systems. The purpose is, given the design of a cogeneration system, to determine an operating strategy that allows maximizing the gross margin of operation while taking into account time-varying loads, tariffs and ambient conditions. The model is capable of considering the simultaneous use of different prime movers (generating electricity and heat), auxiliary boilers, heat pumps, and absorption chillers to satisfy a given demand of electricity and heat. Heat, recovered from the units at two temperature levels, can be stored in hot tanks. Units can have one operative variable (e.g., simple cycle gas turbines, referred to as "one-degree of-freedom" units) or two operative variables (e.g., gas turbines with post firing, referred to as "two-degrees-of-freedom" units), highly nonlinear performance curves describing their off-design behavior, and limitations or penalizations which affect their start-up/shut-down operations. To exploit the effectiveness of modern Mixed Integer Linear Program (MILP) solvers, the resulting Mixed Integer Non Linear Programming (MINLP) model is converted into a MILP one by linearizing all performance curves and constraints according to state-of-the-art techniques. The model, which is written in the AMPL algebraic modeling language and solved with the IBM ILOG CPLEX Optimizer, has been tested on a real plant case. The results have been analyzed from the point of view of simulation capabilities, robustness, quality of the optimization results and computing time.

Original languageEnglish
Publication statusPublished - 2013
Externally publishedYes
Event26th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2013 - Guilin, China
Duration: 16 Jul 201319 Jul 2013

Conference

Conference26th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2013
Country/TerritoryChina
CityGuilin
Period16/07/1319/07/13

Keywords

  • Combined cooling heat and power (CCHP)
  • Heat storage
  • MILP
  • Off-design
  • Planning optimization

Fingerprint

Dive into the research topics of 'A detailed optimization model for combined cooling, heat and power system operation planning'. Together they form a unique fingerprint.

Cite this