Using solar energy at home

Solar energy, you’ve already thought about it, but it’s complex digital signage malaysia, it costs too much, it is neither reliable nor profitable possible domestic uses of solar energy, the associated costs and things to know for an ecological and efficient installation.

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An important, but demanding source of energy

Solar is an energy of the future, with an important resource that is easy to harness digital signage systems supplier malaysia. The Earth receives 8,000 times more solar energy each year than the total energy consumption in the world.

Whether used to generate electricity or heat, solar energy is not always available. The sun is mischievous, it can remain hidden behind the clouds for several days and it is rarer in winter than in summer. Back-up energy to relay the missing solar energy is therefore necessary. To use solar energy 24 hours a day, it must also be able to store it during the day for use in the evening and at night. 

Solar for heating

The sun is above all thermal energy, which transmits its heat to the surfaces it illuminates.

To “heat in the sun”, there are two options: let the sun enter the house when it is there – this is passive solar thermal -, or capture its heat via panels and store it in a hot water tank. hot water to use it when needed: this is active solar thermal .

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Update on “passive” solar thermal

This is the simplest method: let the sun in through the windows and bay windows, so that it heats the interior of the house.

This approach is mainly used in the design of new houses but can be applied in renovation, by modifying the openings. In both cases, sun protection must be provided to avoid overheating in summer: awning (outside the house), pergola, solar cap or even suitable vegetation (a barrier of deciduous trees that will allow the sun’s rays in winter, where the heating needs are important, and will filter them in summer). Depending on the orientation of the windows, it will also be necessary to provide suitable glazing with the appropriate solar transmission coefficient. 

There are also more elaborate methods, such as the addition of a greenhouse or a veranda on the south facade of the house, which will participate in the overall heating of the home, or the storm wall, a solution still not widely used despite its simplicity. . It is a “normal” wall covered in part by glazing which creates a greenhouse effect against the wall and heats it from the outside. 

To make the best use of solar thermal energy, the materials that make up the walls and floors are important. Dense materials with high thermal inertia, such as stone or concrete will have more storage capacity and will therefore be able to release the heat provided by the sun for a longer period of time. If, for example, one wishes to take advantage of the thermal inertia of the stone walls of an old house, one will favor a thermal correction plaster (a lime-hemp plaster or an earth-linen plaster for example). 

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