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Active vs. Passive Solar Water Heater

Plumbernewtown 2 Types of Water HeaterTo save a huge amount of electricity bill, people nowadays try to utilise solar powered facilities. However, this is not just about the bill, people’s concern for the environmental impact of burning fossil fuel made solar powered heaters well-known.

In a solar water heater system, it is classified into two categories, the active water heater and the passive water heater. To know more about them, here are the following differences between the two:

Active Water Heater System
For active heater, this system is composed of a storage area and collectors to get the solar energy needed.

Design
Its design utilises external energy to power pumps and other tools to gather, keep and convert solar energy. Unlike the passive water heater, this heater can store the energy for later use. Large units of this type can provide power for a whole community while smaller ones can be used to supply energy for households.

Active Solar Collector
Unlike the previous system, this is considered as a complex system in terms of its mechanism and design. Both types consist of PV panels that are usually in a stationary position. In the collector, it has it uses either liquid or air that will serve as a conductor.

Active Solar Cooling
The sun’s energy can be utilised to lessen hot temperature during tropical seasons. In some places, this is done by using RPP or Rooftop Photovoltaic Panels to be able to run traditional conditioning systems.

Passive Water Heater system
The most convenient thing about passive heater is that there is no need for does not contain any pumps or controls.

Design
The design of this type of solar heater uses neither a mechanical technology nor conventional sources. Sun rooms, greenhouses and solarium are the examples of a passive solar structure. As the ray of the sun passes through the glass pane, the interior part of it will then absorb and keeps the heat. When you want to invest on this, this concept can reduce the water heater cost by at least half of the amount.

A passive solar home is a collector itself. The drawback about this is that the passive solar home can’t keep a huge amount of heat as a supply for a couple of days. If you want to try this, place the windows on the southern part.

Passive Solar Collectors
As mentioned in the first part, this type of system depends on the windows that face on the south part to catch the sun’s energy. Aside from that, systems could also utilise PV panels. When we talk about the basic law of thermodynamics, heat transfers from a warm area to cool surfaces and one of the easiest way to move it is by convection. Convection is a motion that occurs when warm air increases and cooler air falls down.

Passive Solar Cooling
The cooling design guarantees that passive solar homes can still be cosy even in summer season. Here are a few tips:

  • If you want to have a shade for the southern part of your home, try to plant deciduous trees.
  • The design of the window should be opened for evening time. Through it, night flush and cross-ventilation is possible.