In another article, we have already seen What is energy efficiency, how it works and ways to save money, but now we will go further and understand how an energy efficiency project can bring benefits to a condominium, where the consumption of electricity is usually very high and tends to be increasing.
There are different approaches when looking for greater energy efficiency, there being not only one solution to this problem but a set of changes that if combined can result in larger savings at the end of the month for your condo.
6 Steps to carry out an Energy Efficiency Project for your Condominium:
According to CEPEL, it is considered that a condominium is more energy efficient when it provides the same environmental conditions and uses consuming less energy.
The first step is to ascertain the architectural elements that can contribute to a better result in energy consumption, the main ones are:
- Coverage: The transfer of heat from the Sun to the interior of the rooms may vary according to the material used, the larger the transfer, the greater the demand for refrigeration. In addition, there are options for thermal insulation of the roof that offers low cost as the application of expanded clay or the execution of a green roof, which has a slightly higher price.
- Doors and Windows: By controlling the penetration of light and air circulation, these elements can reduce the temperature by soothing the heat of the environment. The use of solar blocking films in conjunction with awnings or Brisas avoids the incidence of direct but not indirect light, therefore they do not require artificial lighting anymore.
- Walls: the application of materials with good thermal insulation together with a light-colored paint can reduce the absorption of heat by the environment.
2. Changing the lighting
According to INEE (National Institute of Energy Efficiency), an incandescent lamp converts only 8% of the energy consumed in light, warming the rest of the environment undesirably. This rate, however, rises to 32% when it comes to compact fluorescents, that is, it can turn less energy into more light, less heating the environment and requiring less cooling.
Lamps must have the Procel Class A seal and luminaires made of materials that allow maximum reflection of light. Very common in buildings, replacing 40W T12 tubular fluorescent lamps with more efficient luminaires with T5 tubular or tubular LED fluorescent lamps can save up to 35% on electricity consumption
As for LED lighting, a 7W lamp is equivalent to a 60W incandescent, which generates, in the case of an exchange, almost 90% savings. However, when we already have fluorescent lamps, calculations that are not always trivial must be made, taking into account the cost, consumption, and life of each type of lamp to evaluate the exchange.
In addition, the lighting of common areas of a condominium should work through presence sensors and dimmers, so that the lighting is active only when necessary.
Also available in the market, digital lighting controllers take into account the level of natural lighting to efficiently modify the artificial lighting.
For garages, the ideal is that only the corridors are illuminated and not the car boxes, in addition, it is also possible to install presence sensors in these environments.
3. Air conditioning of rooms
Air conditioners can control the temperature humidity, purity, and air distribution in the environments simultaneously. Common in ballrooms and other common areas, the use of inefficient, incorrectly dimensioned and overused appliances leads to a waste of energy.
The under-dimensioning of the air conditioners generates higher costs because there is an excessive consumption of energy and the need for more maintenance due to the wear of parts, since the equipment needs to work more to cool the environment, in case of a sizing than necessary, the devices have higher cost and the energy expenditure is very high.
The correct design of the refrigeration equipment allows the ideal use of the appliance, which according to ANVISA resolution must operate in the range between 23 ° C and 26 ° C in summer and between 20 ° C and 22 ° C in winter. These ranges reduce the temperature difference between the internal and external environment and increase the temperature difference with which the refrigerant is exchanged with room air, increasing the heat exchange along with the reduction of consumption.