Energy supply system for optimizing energy cost, energy consumption and emission of pollutants

An energy supply system comprising:

• power receiving means for receiving electric power from a power plant,
• fuel receiving means for receiving fuel,
• in-system power generating means for generating power and heat by using the fuel received at said fuel receiving means,
• power supplying means for supplying, in system interconnection, the power received at said power receiving means and the power generated by said in-system power generating means to a power consuming installation,
• heat supplying means for supplying the heat generated by the in-system power generating means to a heat consuming installation,
• computing means for computing operation load of said in-system power generating means to minimize an equation "y" set out hereunder when meeting an energy demand of an energy consumer;
• and
• control means for controlling said in-system power generating means to satisfy the operation load computed by said computing means;
• y=aXL+bXM+cXN,
• where "a", "b" and "c" are weighting coefficients a>=0, b>=0 and c>=0, which do not become zero at the same time and do not become a>0, b=0 and c=0 at the same time, where:
• "L" is an energy cost borne by the energy consumer when said energy demand is met,
• "M" is a calculated total quantity of primary energy including energy consumed by said power plant and said in-system power generating means to meet said energy demand, and
• "N" is a calculated total quantity of environmental pollutants released at least by said power plant and said in-system generating means when said energy demand is met, and
• means for inputting values for L, M and N to said computing mean.