Archive for the ‘Solar Thermal Energy’ Category
Solar geysers are a great resource to save money and combat the effects of rising electricity costs in South Africa. With Eskom even subsidizing geysers for South African households, there really is not any excuse left why we need to unnecessarily have to continue paying outrageous energy bills. If you don’t know yet, the advantages and benefits to solar energy, and solar geysers in particular are manifold. If you consume a large amount of electricity, the chances are good you are paying too much on your electricity bills as some electricity tariffs are consumption driven. Reducing this amount could result in your electricity bill being substantially less. Which means in no time your solar geyser will be paying for itself.
A classic solar geyser would consist of a solar panel with a heat transfer fluid flowing through it that transports the heat energy to be collected by the panel from the sun to somewhere useful, typically a hot water tank or household radiator. The solar panel is located at a place with lots of exposure to sunlight during the day, most of the time on top of the roof of the building. A pump would push the heated water through the panel. The water is then taken from the panel and transferred to its storage container.
If you have made the decision of acquiring a solar water heating system for your home, the next step would be to consider your household’s hot water needs. This will place a supplier in the position to recommend a suitable collector size and storage volume, to accommodate your needs. As too small units will not provide enough hot water, overestimating your storage container is usually suggested. Although going too large could be uneconomical and lead to a longer payback period. Make sure to think this through carefully.
Why is it necessary to get a solar geyser, you ask? It is simply one of the most effective ways of nearly cutting your electricity bill in half. Heating your water solely through the sun’s energy saves you from spending money on electricity to keep your geyser working over time. Other related tasks to aid in keeping the heat from seeping out of your geyser, and thus raising your electricity bill is to add a geyser blanket for additional insulation, and get a geyser timer. This in an effort to conserve energy, and save you money.
Depending on the amount of power your new geyser will save, you are entitled to a subsidy ranging from a minimum of R2 500 to a maximum of R12 500 from Eskom, in a bid to make it more accessible to everyday South Africans. This means that in a short matter of time, the geyser will have paid for itself, and you will be left with a lot of free hot water.
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If you have been living in South Africa in the last 15 years, chances are very good that you’ve been hearing about solar and renewable energy. Corporate companies such as Eskom and Government has been urging people to use electricity wisely and conserve wherever possible. Eskom has even gone as far as to subsidize solar geysers for South African households in an effort to raise the nation’s participation in saving electricity. But what is a solar geyser? And what benefit does it hold for the everyday South African household?
Solar water heating, or solar hot water is water heated by the use of a solar geyser. A standard solar geyser generally consists of a solar thermal collector, a water storage tank and a fluid system to move the heat from the collector to the tank. Solar water heating works by expressly heating liquids through the sun’s power, and no electricity is directly generated. It may perhaps use electricity for pumping the fluid, and have a reservoir or tank for heat storage and later use. The water heated in this way may be used in a variety of ways such as for heating swimming pools, under-floor heating or even power input for space heating.
The water moves around a solar heating system either by passive circulation, or by means of pumps (forced circulation). In passive circulation, the water heats up in the collector and rises naturally into the storage container above it, while the cooler water in the storage container flows down to the bottom of the collector, creating an unaided circulation. In order for this system to work effectively and to avoid reverse circulation at night the collector must be placed below the geyser. This sort of system can be supplied with an inherent freeze resistance by using a closed circuit between the collector and the geyser. Forced circulation systems work with a pump that keeps the heat transfer fluid circulating between the collectors and the heat exchanger in the storage container. The pump itself is controlled by a differential controller. The pumps in forced circulation systems are small, and thus do not need or use much power.
ENSAV is a new lead-generating system for energy saving solution suppliers such as solar geysers, solar pool heating, heat pumps and more. ENSAV will find you multiple quotes from one query, and there is a great ratings system in place to help you the client find the best service provider the first time, every time.
ENSAV also has a huge variety of news, articles and videos in an information portal to help educate the prospective client on the different systems, their advantages and disadvantages. Eskom recently doubled the rebates for solar geysers, which means it is becoming much more viable to have one installed. Lawnmakers are also pushing to make solar geyser installation compulsory in new buildings and when a geyser needs replacing. Some insurance companies already have cover available for a solar geyser installation when replacing a faulty geyser.
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