In various industries and productive activities, high efficiency filters are used for the purposes of quality control and pollution prevention. To ensure that capture the type of particles and provided with the necessary effectiveness required, the filters have to undergo various tests to assess their degree of effectiveness and ensure that the required work will be accomplished.

To check the efficiency of filters, there are several parameters which vary according to geographical area, health policies and the requirements of each particular installation. Specifically, high efficiency filters have higher demands for particle capture by the activities of the areas for which they are created. In the European region, there are standards that must be considered.

There are certain standard to consider high efficiency filters such as Environmental Protection Agency (EPA), High Efficiency Particulate Air (HEPA) and Ultra Low Particle Air (ULPA). These filters are subject to testing and classified according to standard EN 1822: 2009.

EN 1822-1. 2009

The start of this standard contains the classification, performance testing, test filters and the rating of EPA, HEPA and ULPA filters. Based on the values determined for the individual efficiency and overall efficiency, the filter is classified into different types of models.

EN 1822-2: 2009

The second part of this standard describes the measurement equipment and aerosol generators used within the range of this test. In addition, with respect to particle counting, it specifies the statistical basis for evaluating each count with only a small number of events. During testing, the capture efficiency of the mesh is determined by the particle count.

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EN 1822-3: 2009

As the third part, on the flat mesh efficiency, particle size is measured and the most penetrating particle size is determined. During this test, the efficiency of particle size is determined using the filter mesh particle counting.

Samples of filter mesh are adjusted in a holder and subjected to a corresponding air flow with the average filtration rate. The test aerosol that comes from a generator is regulated; to name one example is the evaporation of a solvent. Subsequently, it is neutralized and mixed homogeneously with filtered air and guided into the filter.

To determine efficiency, aerosol partial flows are sampled by an updraft and downdraft in the filter mesh. Using a particle counting instrument, the concentration of particles contained is determined by their different sizes.

The results of these measurements are used for graphical penetration against particle size for which penetration is maximum. In this regard, the particle size is known as the most penetrating particle size.

EN 1822-4: 2009

The fourth part consists of applying a test aerosol whose average particle sizes correspond to the MPPS, a revision to the filter mesh for leaks; the overall efficiency is calculated using the filtered efficiencies measured individually.

The leak proof serves to test the filter mesh, so that those individual penetration values ​​exceed and permissible values ​​are detected.

EN 1822-5: 2009

The fifth of this standard has to do with the efficiency test of strainers that could not be subject to the tests, according to part four, because of its design. Sampling the downdraft to determine the overall efficiency is performed using a stationary probe sampling.

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The power consumption of our homes is today one of the most important points of our daily lives. We have many electrical appliances at home and the ones which consume less power are class A such as inverters. If we have high of electricity consuming appliances the electricity bill also go up. I will present today a few tricks to save electricity with the use of air conditioners.

Tips to Save Electricity with Air Conditioning

Install a machine with enough power to meet the needs of your room or bedroom. And I say this because many people, to save a few dollars, install an air conditioner of lower power and then that directly affects electricity consumption, so if you have not yet installed, I recommend you do the corresponding calculation and buy one with enough cooling capacity. Because an air conditioner when the temperature reaches, for example 25°, the compressor stops, and when the temperature rises again, it begins to work again. If you have a smaller machine, the thing is that it never stops or it takes much longer to do so.

Although this also depends on each person, and I say this because you may have it at 25º yet you can be grilled with heat. It is true that depending on how we use, the savings will be higher or lower. For that matter, instead of putting an air conditioning to work continuously, think about as it is better if you put a fan on the ceiling and run it for some time.

Maintain the inside environment and keep all the doors and windows tightly closed, otherwise hot air will enter the room and the machine will not stop working, as a result, it will consume more energy.

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Take advantage of the early morning hours to ventilate and cool the house and after that close it all up tightly. It may seem silly but it will get lower the temperature of the structure several degrees.

Another trick to save electricity with your air conditioning is that you take command of your air conditioning and hide the remote in a drawer or in the farthest corner of the house, so that only you can get it, so no one can find it and, as you already understood, nor will turn on it. In this way, you will save an awful lot of electricity throughout the summer.

Always have clean filters and exchangers. If you have a dirty air filters in your air conditioner, it will make a negative influences on the performance as well as consume more electricity to work.

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