Passive solar energy
Differences between active solar and passive solar energy
Solar energy can be used basically in two ways:
- Through active solar energy (solar photovoltaic and solar thermal)
- Using passive solar energy.
The main difference is that in active solar energy is a process of transformation. Through photovoltaic panels transform solar energy into electricity or by thermal panels transform solar energy into heat energy.
Passive solar techniques are allowing use solar energy directly without processing. For example, depending on the architectural design in the construction of buildings can greatly enhance the natural energy use.
Techniques for passive solar gain
The use passive solar building components such as walls, floors, ceilings, windows, exterior building elements and landscaping to control heat generated by the sun. Solar heating designs try to trap and store thermal energy from direct sunlight. Passive cooling minimizes the effects of solar radiation through shading or generating air convection currents ventilation.
An important factor in the design of buildings for the use of passive solar aspect is knowing how to manage the flow of air currents inside the building to capture dissipate heat in winter and outside in summer.
The natural lighting and passive heating and cooling are the main solar concepts.
A good architectural design also allows us to improve natural lighting. A commercial building can reduce your electricity bill by using natural light. It will create a pleasant environment and reduce air conditioning costs, because it is also a considerable amount of heat generated by the lamps and praise artificial light sources.
Benefits of passive solar energy
Passive solar energy to be characterized by low cost to perform their work. Sometimes, this cost is even zero. The maintenance cost is very low. During operation no greenhouse gases are emitted. However, we continue working for a better optimization of performance and profit.
This does not preclude further work needed to optimize systems for increased performance and profit. Saving and efficiency in energy consumption depends on the size of a facility (whether renewable or conventional). These criteria are more economic benefit criteria if they are considered from the beginning.
Passive solar technologies offer significant savings, especially with respect to space heating. Combined with active solar technologies such as solar photovoltaics, they may also become an excellent source of income.
Last review: September 28, 2015