Generating Electricity? Efficient use?

According to world averages, approximately 70% of the electricity used in industrial facilities is used in 3-phase asynchronous motors. On the load side of the electricity consumed in industrial facilities, most applications are fans, pumps and compressors. For this reason, the arrangements and improvements to be made in these systems are very important for the efficient use of Electrical Energy.

According to world averages, approximately 70% of the electricity used in industrial facilities is used in three-phase asynchronous motors. According to the data of the Ministry of Energy in our country, 48,000 GW of the 68,000 GW electricity consumed in industry in 2006 was consumed in electric motors. Again, according to international statistics, the distribution of electricity consumed in industrial facilities in fans, pumps and compressors is as follows:

PUMPS 29% FANS 16% Compressor 5% OTHER ENGINE 29% EXTERNAL ENGINE 19%

Considering that the electricity consumed in an average automotive factory is 2–2.5 million TL/month, the electricity consumed in an average iron and steel factory is 5-10 million TL/month, and the electricity consumed in an average tire factory is 1-2 million TL/month. The benefits of savings and improvements in pumps, compressors and conveyors will be easily seen. If we take compressor systems as an example, compressed air is often the most expensive form of energy in a business. Compressed air is used in all major industries. In Europe, about 80 TWh of energy is used for compressed air production.

The reasons for choosing fans, pumps and compressors as priority saving areas in the industry are as follows; ► The power consumption of the motors used is high. ► In the first establishment, motors above the maximum capacity are selected. ► Energy costs are large within LCC (life cycle cost) lifetime cost. (C)

LCC (Life Cycle Cost) = Cic + Cin + Ce + Co + Cm + Cs + Cenv + Cd LCC= Lifetime Cost Cic = Initial Investment Cost Cin = Installation and Commissioning Cost Ce = Energy Cost Co = Operating Cost Cm = Maintenance Repair Cost Cs = Cost of Failure and Loss of Production Cenv = Environmental Cost Cd = Cost of Closure and Disposal

The important thing is that these figures, which are known by many and discussed in different platforms, must be transformed into action rather than discourse. For this, awareness raising studies must continue and in fact, the importance of efficiency as well as production in the solution of the existing energy problem should be explained correctly. Energy efficiency; Reducing the share of energy input in production is the realization of the same production by consuming less energy. In another definition, energy efficiency; It is expressed as the reduction of energy consumption without causing a decrease in the standard of living and service quality in buildings, and the quality and quantity of production in industrial processes. For this reason, efficiency studies to be carried out in the industrial sector, which has a large share in energy consumption, are very important. In this context, I would like to start the topic of efficiency by talking about the use and need of variable speed drives in this article, and I would like to elaborate on this subject in my other articles.

produce? Is it efficient to use? What is the importance of drivers? Here are the 4 main reasons to use Driver Systems. ►Using the system at maximum capacity and high efficiency with the possibility of increasing the speed when high capacity is required, ►Best energy efficiency and lowest energy costs with the possibility to reduce speed when low capacity is required, ►Minimum maintenance for both electrical and mechanical equipment with the possibility of soft starting the motor at all times, ►Best product quality with accurate and optimal speed in variable process situations.

When the following information is examined, it is clearly seen that the drivers can save 9.5% from the total electrical energy used. Total electrical energy 100% 63% is consumed in electric motors 63% 60% driven by pump or fan 37% Driver can be used 50% due to process 19% 50% energy savings can be achieved 9.5%

What if we calculate numerically how our power consumption will be affected if the speed is reduced by 20% in an oversized pump system? P1 =132 kW and n1=1500 rpm and P2 = ? kW and n2=1200 rpm P2= 132 / (1500/1200)^3 Power is proportional to the cube of speed. (P~N^3) As a result, P2 = 67.58KW and it can be seen that there is a 51% decrease in Energy.

Energy Consumption Comparison Generally, since it is difficult to determine the parameters of fan & pump systems clearly, they are sized by leaving a margin above the maximum requirement. Unnecessary energy consumption caused by oversizing the system is tried to be eliminated by playing with the flow rate at constant engine speed in some simple control methods. While other control methods provide control over the system curve, more efficient results are obtained as energy savings are achieved by changing the fan & pump curve in VSD applications.

in pumps It reduces mechanical shocks. (Hammering Effect) The risk of cavity formation is reduced. (Cavitation) LCC reduces maintenance costs in Lifetime Cost. ( cm ) in fans Reduces mechanical shocks Since torque jumps do not occur at take-off, they do not wear out the mechanical parts. LCC reduces maintenance costs in Lifetime Cost. ( cm ) in compressors Since torque jumps do not occur at take-off, they do not wear out the mechanical parts. Thus, by reducing maintenance costs and extending service times; LCC reduces maintenance costs in Lifetime Cost. ( cm )

Electrical Benefits Since the motors always start and stop softly in VSD applications, sudden current spikes that wear down the switchgear equipment do not occur as in direct starting, star delta or soft starter applications. Harmonic harmonics to the grid can be reduced by choosing Low Harmonics series drivers.

Mechanical Benefits in pumps It reduces mechanical impacts. (Hammering Effect) The risk of cavity formation is reduced. (Cavitation) LCC reduces maintenance costs in Lifetime Cost. ( cm ) in fans Reduces mechanical shocks Since torque jumps do not occur at take-off, they do not wear out the mechanical parts. LCC reduces maintenance costs in Lifetime Cost. ( cm ) in compressors Since torque jumps do not occur at take-off, they do not wear out the mechanical parts. Thus, by reducing maintenance costs and extending service times; LCC reduces maintenance costs in Lifetime Cost. (ABB) (cm)

If the energy culture and efficiency awareness in the society is improved, there is an opportunity to save 2.5 billion YTL energy annually until 2010 in our country. In addition, 2008 has been declared as the 'Year of Energy Efficiency' in our country, and efforts will be continued for the education and awareness of the society by implementing the 'En-Ver' energy efficiency project and the 'Water-Give' project on water efficiency in order to use energy and water efficiently. It has been calculated in the studies conducted that each unit saving in energy reduces the expenditures for energy by 2.5-3 units. As a result, by ensuring energy supply security, our energy investment needs and import dependency will decrease, and it will contribute significantly to the improvement of economic growth and the protection of the clean environment. In short, with the dissemination of energy efficiency awareness in every part of the society, we need to carry it to every area of ​​our lives as a way of life. See you in our next article.