Solar energy water heater There are two basic types of solar water
heaters:Passive & Active.Active systems utilize a circulating pump
and some type of temperature control.Passive systems do not have
any moving parts and rely on the basic principle of physics-that
hot water rised & cold water falls.Active systems all function
basically the same, however, there are different configurations
(closed loop and open loop), depending on your climate zone.Passive
systems come in two basic types:Thermosyphon & Batch.Each system
has its distinct advantages.Active systems use electric pumps,
valves, and controllers to circulate water or other heat-transfer
fluids through the collectors.They are usually more expensive than
passive systems are generally easier to retrofit than passive
systems because their storage tanks do not need to be installed
above or close to the collectors.The thermosyphon solar water
heaters relies on The natural circulation of water between the
collector and the tank or heat exchanger.As water in the vacuum
tubes is heated it rise naturally into the tank, while cooler water
in the tank flows down to the bottom of the vacuum tubes, causing
circulation throughout the system.The following picture is the
simplest of installation configurations for the thermosyphon
tubular solar water heater.The tank is low pressure, open
vented.The tank is manually filled by opening a tap in the
house.Once the tank is full water runs out through an overflow pipe
which is fed back down into the house.When water starts flowing out
the tank is full.When using water the tank gradually drains until
it is empty.Once accustomed to the method of operation, the user
knows how much water is left in the tank and can fill it up at the
appropriate time.Depending on hot water usage pattern and weather
conditions, the hot water can be used directly for showering, or
can be used as a pre-heat, feeding the inlet of an instant or tank
water heater.Content:1.Outer tank material:Galvanized steel plate,
stainless steel.Galvanized iron sheet, colour steel plate.2.Inner
tank material:SUS304-2B Stainless steel plate of food grads.3.Inner
tank insulation layer:40-75mm integrate foamed
polyurethane.4.Support material:Shaped aluminum alloy, stainless
steel, plastic coated circular steel tube, electrophoresis aluminum
alloy.5.Normal water temperature:45-95 centigrade 6.All-glass
evacuated solar collector tubes, thermal transfer rate≤0.022W/m.K,
outer diameter:47mm/58mm/70mm.Length:1.5m, 1.6m, 1.8m, 2.0, 2.1m
7.Water volume( litre):100_300 8.Packing:Carton.Solar water heater,
solar energy heater, solar powered water heater, solar water heater
project, home appliance, solar product, water heater
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