Possible method for determining the energy and process efficiency will be presented, taking one refinery unit named Catalytic Reforming as an example.
From the aspect of energy, the efficiency of Catalytic Reforming is analyzed through the cost price of medium pressure steam and the possible money savings that can be realized by eliminating differences between the target standard (average energy consumption standards of Western European refineries) and specific energy consumption.
Steam gross consumption of observed Catalytic Reforming process is 40,000 t or 119 TJ. By observing the energy flows and Senky's diagram of energy flows of Catalytic Reforming process, it can be seen that by the own generation of medium pressure steam Catalytic Reforming ensures 10,000 t or 30 TJ i.e. about 25% of its own gross consumption, at the cost price of 0.45 US$/t. The remaining quantity of steam required, in the amount of 30,000 t or 89 TJ, is supplied from the refinery Power Plant at the cost price of 9.66 US$/t. The average cost price of medium pressure steam used for own consumption of Catalytic Reforming is 7.36 US$/t. Possible money savings realized by eliminating differences between the target standard and specific energy consumption are approximately 550,000 US$ per annum. Money savings can be achieved by using more efficient technological energy and organizational solutions.
From the aspect of technological process, Catalytic Reforming efficiency is analyzed through the cost prices of semi-products generated in this unit.
Methodology for determining the cost prices of semi-products is based on the principles of elective division calculation with equivalent numbers, as the most complex form of accountancy calculations.
Possible methods for determining the equivalent numbers are as follows: Product Density Method, Thermal Value Method and Average Production Cost Method.
Analyzing the results obtained by the mentioned calculating bases for determining the equivalent numbers, important differences in the cost prices per ton of product can be seen.
In addition to being one of the main energy generators, and a significant bearer of energy in final use, oil processing industry is at the same time a great energy consumer. The importance of oil processing industry as one of the main pillars of national energetics, obligates it to process oil in a conscientious, economical way. The mere fact that oil refineries mostly use their own (energygenerating) products does not free them from the obligation to consume these energy carriers rationally. Rational consumption of oil derivatives should start at the very source, in the process of derivative production, and it should be manifested in a reduction of own energy consumption in the BLOCK 2 - - FORUM 8 119 METHODS OF D