Solar system design - how does
Solar heating system design
A typical solar system comprises a solar panel collector
mounted usually on a roof. This then heats the water in the
cylinder indirectly through a coil at the bottom of a cylinder.
The sealed system is pressurised the water has glycol added
to prevent freezing and has an expansion vessel, pressure relief
valve, pump and controller. Whenever the collectors are hotter
than the cylinder, the controller switches on the system's
circulating pump. A mixture of antifreeze and water is then
circulated through the collectors and the cylinder's heat exchanger,
heating the cylinder in just the same way as a central heating
Solar heating system components
There are two different types of solar collectors; flat
plate and evacuated tubes. Evacuated tube systems occupy a
smaller area but are generally more expensive. High efficiency
Flat plate systems have an efficiency close to the evacuated
tube types and are generally cheaper but they are heavy to
handle larger footprint on the roof and can cost more to install
due to the physical installation requirements..
Cylinder A twin coil hot water cylinder with
160 litre capacity. This provides a similar amount
of hot water as a conventional 120 litre single
coil hot water cylinder. Solar heated water circulates
through the bottom coil, with the top coil used
for topping up the heat using your existing gas
or oil fired boiler. space is also left for an
electric immersion heater to be installed. The
cylinder is heavily lagged with twice the normal
thickness of foam insulation (100mm insulation
thickness) Tall and thin cylinders are recommended
for solar heating applications because temperature
gradients within the tank (stratification) optimise
efficient transfer of the sun's energy to the
choice of which solar controller to use will depend
upon the type of system. The controller will typically
need wiring to two sensors (one on the solar panel,
and one on the solar store or adjoining pipe work),
to the solar pump, and to the mains electrical
supply. Pre-assembled controls packs, such as Resols
controller unit, these give a much more professional
finish to the installation and allow the user to
fully monitor their solar systems performance.
The pump, pipe, valves and devices that connect
everything together and ensure the system works
reliably year after year. All our systems include
pressure, temperature and flow instrumentation
so you can see if the system is functioning properly.
This is complete in a compact and insulated housing.
Flame Fix provide oil service and gas service, repairs and maintenance.
Covering the Exeter Devon region for domestic heating appliances,
oil boiler and gas combi boiler fault finding, central heating installations,
landlord safety certificates,solar thermal heating design and installation
clear skies registered. We also install bio mass pellet burner systems.
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