Bright Leaf Solar Water Heater
Energy-Efficient Solar Water Heating Solutions For Homes, Hotels & Commercial Applications
Solar Water Heater
A solar water heater works by capturing sunlight in solar collectors, which heats water or a heat-transfer fluid and sends it to an insulated storage tank.
This heated water is then ready for use, with a backup heater sometimes available during periods of low sunlight.
What Are Solar Water Heaters?
Solar water heaters are devices designed to harness the abundant and free energy of the sun to heat water.
These systems capture and utilise solar energy to raise the temperature of water to a comfortable range, typically between 60°C to 80°C.
A solar water heater has four major components:
Solar collector: Absorbs solar energy from sunlight.
Insulated tank: Stores hot water while minimising heat loss.
Supporting stand: Provides stable support for the system installation.
Connecting pipes & instrumentation: Transfers water and manages system operation.
The collector panel contains a black absorbing surface called an absorber, which captures solar energy efficiently.
The absorbed heat is transferred to the water circulating through the collector.
The heated water is then stored in an insulated tank designed to maintain temperature and reduce heat loss.
Water circulation between the collector and storage tank happens automatically, ensuring a steady and reliable supply of hot water.
Different Types of Solar Water Heaters
Depending on the collector system used, solar water heaters are mainly classified into the following types:
Flat Plate Tube Collector
The flat plate tube collector consists of a flat rectangular panel that absorbs sunlight and heats water inside tubes or channels.
The heat-absorbing panels are generally made from copper or aluminium, which are excellent conductors of heat.
The heated water is transferred to a storage tank for various heating applications.
Evacuated Tube Collector
The evacuated tube collector consists of double-layered borosilicate glass tubes with a metal absorber tube inside each tube.
These tubes are highly insulated and create a vacuum that minimises heat loss.
When sunlight strikes the absorber tube, it heats the water inside, which is then transferred to the water heater storage tank.
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