Active Solar Water Heater Systems And How They're Better Than A Traditional Water Heater By Itself
Solar water heater systems are designed to be active, with
pumps or fans to promote the gathering of heat, or passive,
with no mechanical parts added to the system. Solar water
heaters have been around since just before the dawn of the
twentieth century. Standard natural gas water heaters took
their place in the early 1900's. Since the 1970's, new
technologies have solved the many problems that have
plagued the solar water heater industry. Problems like
excessive oxidation and just plain not having enough hot
water are not problems now.
The only major differences between the four different kinds
of active solar water heater systems is the way in which
the heat collector, which is located on top of your roof or
similar location, protects itself against freezing. These
systems are called: Recirculate, drain-down, drain-back,
and heat exchange.
The recirculate system
This system uses an electrical pump to move water through
the collector to prevent it from freezing. Moving water
will not freeze, but some heat is sacrificed to do this.
The drain-down system
This system simply takes the water out of the collector by
opening a valve when a thermostat indicates that the water
is near freezing. If the electricity goes out for this
system, then it will remove the water from the collector as
well.
The drain-back system
This system uses a heat exchanger to store drained water
from the collector when it nears freezing. The heat
exchanger coordinated with a storage tank, pushes the water
through to the water heater and then the rest of the house.
The drain-back system has an electrical pump that works
most of the time. If the pump is shut off for any reason,
the heat exchanger stores the water from the collector and
uses this water as the heating fluid. The heat exchanger
can lose up to 10% of its heating efficiency.
The heat exchange system
This system is the only system which does not drain out any
water from the collector when it nears freezing. The heat
exchanger uses an oily fluid that prevents freezing to
travel to the collector and keep the water warm. Some of
these systems use compressed air to heat the water instead
of an oily fluid.
All these active systems have sensors located on them to
keep the pumps and fans working. These systems need
maintenance on a regular basis. These systems should still
be able to be bypassed by a standard water heater if
necessary.
----------------------------------------------------
Check out http://www.waterheater-info.com or contact
johnnyhayneser@gmail.com for information on solar water
heaters (they're the ultimate in energy efficiency),
tankless water heaters (they save you money on your energy
bill), traditional tank-type water heaters (they're the
cheapest and easiest to install), water heater repair and
maintenance, brand information, warranty information and
which installer to hire.
pumps or fans to promote the gathering of heat, or passive,
with no mechanical parts added to the system. Solar water
heaters have been around since just before the dawn of the
twentieth century. Standard natural gas water heaters took
their place in the early 1900's. Since the 1970's, new
technologies have solved the many problems that have
plagued the solar water heater industry. Problems like
excessive oxidation and just plain not having enough hot
water are not problems now.
The only major differences between the four different kinds
of active solar water heater systems is the way in which
the heat collector, which is located on top of your roof or
similar location, protects itself against freezing. These
systems are called: Recirculate, drain-down, drain-back,
and heat exchange.
The recirculate system
This system uses an electrical pump to move water through
the collector to prevent it from freezing. Moving water
will not freeze, but some heat is sacrificed to do this.
The drain-down system
This system simply takes the water out of the collector by
opening a valve when a thermostat indicates that the water
is near freezing. If the electricity goes out for this
system, then it will remove the water from the collector as
well.
The drain-back system
This system uses a heat exchanger to store drained water
from the collector when it nears freezing. The heat
exchanger coordinated with a storage tank, pushes the water
through to the water heater and then the rest of the house.
The drain-back system has an electrical pump that works
most of the time. If the pump is shut off for any reason,
the heat exchanger stores the water from the collector and
uses this water as the heating fluid. The heat exchanger
can lose up to 10% of its heating efficiency.
The heat exchange system
This system is the only system which does not drain out any
water from the collector when it nears freezing. The heat
exchanger uses an oily fluid that prevents freezing to
travel to the collector and keep the water warm. Some of
these systems use compressed air to heat the water instead
of an oily fluid.
All these active systems have sensors located on them to
keep the pumps and fans working. These systems need
maintenance on a regular basis. These systems should still
be able to be bypassed by a standard water heater if
necessary.
----------------------------------------------------
Check out http://www.waterheater-info.com or contact
johnnyhayneser@gmail.com for information on solar water
heaters (they're the ultimate in energy efficiency),
tankless water heaters (they save you money on your energy
bill), traditional tank-type water heaters (they're the
cheapest and easiest to install), water heater repair and
maintenance, brand information, warranty information and
which installer to hire.
posted by Hugh Harris-Evans at 12:48 AM
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