Water heating systems powered by solar energy, and also called collectors, get fitted on the roof. These are installed on North facing roofs to ensure full optimization concerning the collection of heat from the sun that will heat up the water to be stored in hot water cylinders or boilers.
Seated inside of the collectors would be optimal ratio mixtures that consist of non-toxic antifreeze fluid to function as a heat transfer fluid to transport the heat inside the collectors into what they call heat exchanger coils for the tank.
Many a homeowner would love to change their electric geyser into a solar geyser and would approach a prominent roofing company to make their ideals a reality. Why is this the case? Because one of the biggest consumers within any household is your electric geyser as it uses as much as 40 to 45% of your power.
What You Need to Consider When Choosing a Solar System
- Is my roof north facing?
- If not, then west facing will also do. However, you’ll need additional panels to accommodate your tank size and compensate for the loss of sun energy in the morning.
- Ensure there are no big trees that will throw shade onto the space that has been set aside for the installation of the solar panels on roof.
- When selecting your solar powered tank, you should opt for a bigger one to maximize the power of the sun. Doing so will ensure that you would still have power during cloudy days.
- Know those vertical tank systems are usually sized to set up as one centralized system per household. It features an insulated ring main system to feed hot water to all your designated water points.
The Orientation of the Solar Heat Collectors
The minimum suggested an angle of inclination for fitting flat plate collectors would be 10 degrees to ensure sufficient thermosyphon flow occurs, meaning that any rain will wash the dust of the glass materials.
The maximum angle of inclination should be set at 50 degrees. More significant angles will result in unwelcome shading during certain times of the year and result in less than desirable results.
Talking about shading, the solar collectors should be set up in such a way that they are shade free for the rest of the year. Shading should especially be avoided between 9am to 3pm. During this period, most of the solar energy is absorbed.
Partial shading during specific time slots of the day would have no effect on its efficiency as a solar panel.
In places where shading is unavoidable, you may want to request your roofing contractor to add extra collectors to compensate for the shortfall.
What if you choose to use gas water heaters instead of its electric counterparts?
There are numerous advantages to making use of gas water heaters, such as:
- The water gets heated while it flows through your unit, and you can look forward to instant hot water.
- These units are essentially low-pressure water heaters
- Water heaters, in general, are safeguarded against excess water pressure delivery when in use. If the water pressure is too high, water flow regulators will protect the heater against sudden pressure surges using a bypass valve.
- The ignition system of these systems is powered by a battery.
Most gas water heaters are automated in that there is no pilot light present to ignite once the water and gas supplies are connected and present. Just by opening the hot water tap, the gas will be ignited to provide instant hot water. When the tap gets closed, the gas supply will be cut immediately to extinguish the flame.
No doubt, gas heaters have an advantage over electric ones as you will never run out of hot water unless you run out of gas. In the event of overheating, a particular protection device would automatically cut off the gas supply.
The sun, wind, and waves are all elements of nature, and free. The equipment that is needed to harvest the energy this produce is what costs us. Therefore, it makes sense to hire a professional roofer to get it right first time round.