When my first child had an accident at home, I realised we hadn't childproofed the house as well as we could have. Thankfully, they were fine, but I learned my lesson and began a thorough inspection of my home and garden. I got to work addressing the various hazards we had overlooked, and I started this blog to help other parents think objectively about the hazards in their own homes. I post about a variety of topics, such as pool safety, choosing a safe garden fence, storing medication and cleaning products, window and door locks and kitchen safety for kids. I hope you find my blog useful and informative.
In most Australian homes, heating water is considered the biggest source of greenhouse emissions. Households, as well as communities, are thus encouraged to turn to solar hot water technologies. If you are interested in these techniques, it is critical that you know the various solar hot water systems available to you. These include:
Direct system – In this type, water passes directly through the system, and it is circulated through the collector. This system does not need to heat glycol - an anti-freeze - and then pass it through the heat exchanger fitted in the water tank. This technique is suitable for most homes because of the low water hardness levels found in most households. It is also suitable is areas where there is moderate climate, that is, temperatures above -10ºC. The biggest advantage of the direct solar hot water system is that there is efficient heat transfer because there is no need for heat exchanging compounds. However, if you use hard water in your home or your home is located in Polar Regions, this solar hot water system is not ideal for you.
Closed Loop – This is the most versatile solar hot water system in the market. It is commonly used in homes, commercial purposes, space heating and in places where water quality may corrode the copper. In case you want to use this system for business applications, you must ensure that the water to be heated is not portable. It is vital to note that the liquid that circulates through the collector is separate from the water in the primary system and may be a mixture of water and glycol. The main advantage of this system is that it can withstand water of poor quality and stagnating conditions. However, it is not as efficient as the direct solar hot water system since it needs a heat exchanger. Its cost is also relatively high because it is a more complex system.
Drainback system – The drain back solar hot water system resembles the closed-loop systems since it uses an anti-freeze to prevent freezing in the collector. A heat transfer fluid that is unpressurized is pumped through the collector while being kept separate from the end water that is being heated. Whenever the pump is off, the heat transfer liquid drains from the collector to the lines. The drain-back solar hot water system is suitable for areas with frigid night temperatures and poor water quality. The ability of the system to utilize gravity's pull as freezing protection is its principal advantage as it allows the system to prevent freezing even when you turn the pump off. Additionally, this capability prevents the system from over relying on glycol as a heat transfer fluid.
For more information, contact companies like Solar Repairs.