Symbols used | ||

A | - | binary variable |

a | - | coefficient in the matrix |

A | - | matrix of input data |

A | [m | surface of the heater |

A | [m | surface of the cooler |

A | [m | surface of the heat exchanger |

B | - | binary variable |

CF | [kW・K | heat flow |

C | [J・(kg・K) | heat capacity |

C | [EUR・kg | price of raw materials, products and UC |

ddv | [%] | tax |

E | [kWh・a | energy productivity |

H | [kJ・mol | standard reaction enthalpy |

I | [kEUR] | investment of process units |

k | - | mass conversion |

k | [kW・(K・m | heat transfer coefficient of the heater |

k | [kW・(K・m | heat transfer coefficient of the cooler |

k | [kW・(K・m | heat transfer coefficient of the heat exchanger |

M | [kg・kmol | molar mass |

M | [m | the big-M |

qm | [kg・h | mass flow |

Q | [kW] | consumption of cold UC |

R | [kJ・(kmol・k) | general gas constant |

R | [kW・k | consumption of hot UC |

P | [bar] | pressure |

P | [kW] | power |

UC | [kWh・a | consumption of utility |

t | [h], [a] | time |

T | [˚C], [˚K], | temperature |

V | [m | volume |

Z | - | binary variable |

Z | [kEUR・a | maximized annual profit |

X | - | molar yield |

y | - | binary variable |

y | - | matrix of binary variables |

AMORT | [kEUR・a | cost of amortization of process units |

odh | [kEUR・a | expenses |

O PER | [kEUR・a | additional operating costs |

prod | [kEUR・a | income of the sale of products |

prod_steam | [kEUR・a | sale of medium pressure steam |

prih | [kEUR・a | incomes |

PROF | [kEUR・a | annual profit |

raw | [kEUR・a | cost of raw materials |

TAXE | [kEUR・a | emission taxes |