Detailed Product Description
Solar water heating also called solar domestic hot water
systems, can be a to generate hot water for your home. They can be
used in any climate, and the fuel they use sunshine is free.
Solar water heating systems include storage tanks and solar
collectors. There are two types of solar water heating systems:
active, which have circulating pumps and controls, and passive,
which don't.
Most solar water heaters require a well-insulated storage tank.
Solar storage tanks have an additional outlet and inlet connected
to and from the collector. In two-tank systems, the solar water
heater preheats water before it enters the conventional water
heater. In one-tank systems, the back-up heater is combined with
the solar storage in one tank.
3. solar water
heating system type:
1) There are two types of active solar water heating
systems:
A: Direct circulation systems
Pumps circulate household water through the collectors and into
the home. They work well in climates where it rarely freezes.
B: Indirect circulation systems
Pumps circulate a non-freezing, through the collectors and a .
This heats the water that then flows into the home. They are
popular in climates prone to freezing temperatures.
2) Passive
solar water heating systems are typically less
expensive than active systems, but they're usually not as
efficient. However, passive systems can be more reliable and may
last longer. There are two basic types of passive systems.
These work best in areas where temperatures rarely fall below
freezing. They also work well in households with significant
daytime and evening hot-water needs.
Water flows through the system when warm water rises as cooler
water sinks. The collector must be installed below the storage tank
so that warm water will rise into the tank. These systems are
reliable, but contractors must pay careful attention to the roof
design because of the heavy storage tank. They are usually more
expensive than integral collector-storage passive systems.
Solar water heating systems almost always require a backup
system for cloudy days and times of increased demand. usually
provide backup and may already be part of the solar system package.
A backup system may also be part of the solar collector, such as
rooftop tanks with thermosyphon systems. Since an
integral-collector storage system already stores hot water in
addition to collecting solar heat, it may be packaged with a for
backup.
4. Selecting a
Solar Water Heater
Before you purchase and install a solar water heating system,
you want to do the following:
Consider the economics of a solar water heating system
Evaluate your site's solar resource
Determine the correct system size
Determine the system's energy efficiency
Estimate and compare system costs
Investigate local codes, covenants, and regulations.
5. Installing
and Maintaining the System
The proper installation of solar water heaters depends on many
factors. These factors include solar resource, climate, local
building code requirements, and safety issues; therefore, it's best
to have a qualified, solar thermal systems contractor install your
system.
After installation, properly maintaining your system will keep
it running smoothly. Passive systems don't require much
maintenance. For active systems, discuss the maintenance
requirements with your system provider, and consult the system's
owner's manual. Plumbing and other conventional water heating
components require the same maintenance as conventional systems.
Glazing may need to be cleaned in dry climates where rainwater
doesn't provide a natural rinse.
6. Improving
Energy EfficiencyAfter your water heater is
properly installed and maintained, try some additional to help
lower your water heating bills, especially if you require a back-up
system. Some energy-saving devices and systems are more
cost-effective to install with the water heater.
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