The operation and installation of an air conditioning system have the purpose of cooling and dehumidifying the interior space of a home or a public building. To do this, the vapor compression cycle is used, which consists of circulating a refrigerant material inside the system that notably increases its temperature when it is compressed and cools quickly when it does the opposite. That is when it expands.
The outer part of an air conditioning system is called the condensing unit and contains on one side the compressor that consumes most of the energy and the condensing coil. The interior mechanical equipment, called the air control unit, contains the evaporator coil, the interior blower, and the extension or regulating valve. The controls and ducts through which the cold air circulates complete an air conditioning system.
Ventilation And Indoor Air Quality
Adequate conditioning of the interior environment of a home through an air conditioning system that cools the rooms in summer must be accompanied by a ventilation system that guarantees the health conditions and the quality of the interior air throughout the year. These systems must renew polluted air and also reduce excessive humidity levels. Therefore, the construction of inefficient homes in which the air is filtered should be avoided and, on the contrary, the installation of hybrid or mechanical ventilation systems should be promoted.
This requirement is due to the fact that in old buildings, ventilation is produced by natural ventilation and air filtration. However, these leaks are not a controllable source of the amount of air renewed. For example, air infiltration is higher during cold and windy periods, and is often quite low during hot periods.
With mechanical ventilation systems, it is possible to extract polluted air from humid rooms (kitchen, bathrooms, and toilets) and drive new, clean and filtered air into dry areas: living room and bedrooms. These systems also make it possible to dilute the polluting elements that are produced regularly inside a home, such as humidity, the CO2 produced by the metabolism of people when carrying out their activities, as well as other suspended elements produced by the building materials, construction, furniture, or finishes of a home.
To this aspect, we must add the advantages of installing a mechanical ventilation system incorporating fans with heat recovery. This system allows the heat of the interior environment to be conserved in winter and cooled in summer. For this, the heat exchangers recover 92% of the extracted air so that the air is introduced inside the house at 19ºC when the temperature gradient between the outside and the inside is 15ºC. In summer, the airflow is introduced at 22ºC, when the outside temperature is 30ºC and the inside temperature is 21ºC.
Final Words
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