Analys av energiförbrukning, Akzo Nobel Functional Chemicals AB
The main purpose of this project was to make a survey of the steam and electricity consumption at Akzo Nobel Functional Chemistry AB and give suggestions of how to minimize them. These three different areas were focused on. First to make a survey of all the most important consumers, second to find the electricity consumption of the air compressors and the amount of waste heat produced from them. The third area was to calculate a model of how much fresh water that is used during a cooling sequence in the water based heating/cooling system of the reactors and give a suggestion of a suitable reuse for this water.The main result is a total survey of the energy consumption in steam and electricity. The survey shows that the second largest group after drying is heating of ventilation which gives big potentials of reducing the total steam consumption if there is a way of being self supporting in ventilation heat. Because of the large amount of waste heat from the process equipment to the surrounding it could be possible to make the ventilation unit self supporting in heat by using an air to air heat exchanger.The second area that was decided to focus on was the two air compressors that is consuming a lot of electricity and produce a lot of hot water that could be reused in other applications. The waste heat from the air compressors may be used to preheat the water based heating system of the ventilation units.The third area that?s been looked closer into is the inefficient heating/cooling circuit of the reactors that also produces a lot of hot waste water. The simplest solution to this problem is to accumulate the amount water that?s holds a certain minimum temperature and recycle it in the next heating sequence. The calculated model gives the amount produced hot water which depends on the chosen temperature interval.