This is definitely the time to consider green renewable energy avenues and Plumbing Johannesburg specialize in solar geyser installations – the first step in achieving this.
As a company, Plumbing Johannesburg has a specialized solar-installation team in place to facilitate these installations.
We specialize in the following types of solar geyser installations:
- High-Pressure Thermosiphon Systems
- High-Pressure Split Pumped Systems
- Retrofit Systems
Why install a solar geyser?
Installing a solar geyser can save you up to 40% on your monthly electricity bill. These savings really start to add up over the long term. With load shedding and extended blackouts you are no longer reliant on Eskom to heat your water. Solar geysers do however have a heating element that can be connected to a timer to heat the water if necessary during long periods of bad weather. This will ensure you have hot water at all times.
How a solar geyser works
Solar water heating is the conversion of sunlight into renewable energy for water heating using a solar thermal collector. Solar water heating systems comprise various technologies that are used worldwide increasingly. In a “close-coupled” system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the hot water naturally rises into the tank through thermosiphon flow. In a “pump-circulated” system the storage tank is ground- or floor-mounted and is below the level of the collectors; a circulating pump moves water or heat transfer fluid between the tank and the collectors.
Direct Solar Geyser
Direct or open loop systems circulate potable water through the collectors. They are relatively cheap but can have the following drawbacks:
- They offer little or no overheat protection unless they have a heat export pump.
- They offer little or no freeze protection, unless the collectors are freeze-tolerant.
- Collectors accumulate scale in hard water areas, unless an ion-exchange softener is used.
Until the advent of freeze-tolerant solar collectors, they were not considered suitable for cold climates since, in the event of the collector being damaged by a freeze, pressurized water lines will force water to gush from the freeze-damaged collector until the problem is noticed and rectified.
Indirect Solar Geyser
Indirect or closed loop systems use a heat exchanger that separates the potable water from the fluid, known as the “heat-transfer fluid” (HTF), that circulates through the collector. The two most common HTFs are water and an antifreeze/water mix that typically uses non-toxic propylene glycol. After being heated in the panels, the HTF travels to the heat exchanger, where its heat is transferred to the potable water. Though slightly more expensive, indirect systems offer freeze protection and typically offer overheat protection as well.